hy3sd9MOAcc.json

[
    {
        "text": "[Music]",
        "start": 3.4,
        "duration": 9.859
    },
    {
        "text": "[Music]",
        "start": 15.28,
        "duration": 6.869
    },
    {
        "text": "all right this is cs50's Introduction to",
        "start": 24.56,
        "duration": 4.799
    },
    {
        "text": "programming with python my name is David",
        "start": 27.48,
        "duration": 3.879
    },
    {
        "text": "men and this is our week on regular",
        "start": 29.359,
        "duration": 4.641
    },
    {
        "text": "Expressions so a regular expression",
        "start": 31.359,
        "duration": 4.961
    },
    {
        "text": "otherwise known as a Rex is really just",
        "start": 34.0,
        "duration": 4.36
    },
    {
        "text": "a pattern and indeed it's quite common",
        "start": 36.32,
        "duration": 4.12
    },
    {
        "text": "in programming to want to use patterns",
        "start": 38.36,
        "duration": 4.679
    },
    {
        "text": "to match on some kind of data often user",
        "start": 40.44,
        "duration": 4.56
    },
    {
        "text": "input for instance if the user types in",
        "start": 43.039,
        "duration": 4.0
    },
    {
        "text": "an email address whether to your program",
        "start": 45.0,
        "duration": 4.079
    },
    {
        "text": "or a website or an app on your phone you",
        "start": 47.039,
        "duration": 3.321
    },
    {
        "text": "might ideally want to be able to",
        "start": 49.079,
        "duration": 3.241
    },
    {
        "text": "validate that they did indeed type in an",
        "start": 50.36,
        "duration": 3.28
    },
    {
        "text": "email address and not something",
        "start": 52.32,
        "duration": 3.36
    },
    {
        "text": "completely different so using regular",
        "start": 53.64,
        "duration": 3.399
    },
    {
        "text": "Expressions we're going to have the new",
        "start": 55.68,
        "duration": 3.8
    },
    {
        "text": "found capability to Define patterns in",
        "start": 57.039,
        "duration": 4.881
    },
    {
        "text": "our code to compare them against data",
        "start": 59.48,
        "duration": 4.039
    },
    {
        "text": "that we're receiving from someone else",
        "start": 61.92,
        "duration": 3.44
    },
    {
        "text": "whether it's just a validated or heck",
        "start": 63.519,
        "duration": 3.441
    },
    {
        "text": "even if we want to clean up a whole lot",
        "start": 65.36,
        "duration": 3.36
    },
    {
        "text": "of data that itself might be messy",
        "start": 66.96,
        "duration": 4.44
    },
    {
        "text": "because it too came from us humans",
        "start": 68.72,
        "duration": 4.48
    },
    {
        "text": "before though we use these regular",
        "start": 71.4,
        "duration": 4.399
    },
    {
        "text": "Expressions let me propose that we solve",
        "start": 73.2,
        "duration": 5.84
    },
    {
        "text": "a few problems using just some simpler",
        "start": 75.799,
        "duration": 5.041
    },
    {
        "text": "syntax and see what kind of limitations",
        "start": 79.04,
        "duration": 4.079
    },
    {
        "text": "we run up against let me propose that I",
        "start": 80.84,
        "duration": 4.599
    },
    {
        "text": "open up vs code here and let me create a",
        "start": 83.119,
        "duration": 4.481
    },
    {
        "text": "file called validate dopy the goal at",
        "start": 85.439,
        "duration": 3.801
    },
    {
        "text": "hand being to validate how about just",
        "start": 87.6,
        "duration": 3.519
    },
    {
        "text": "that a US users's email address they've",
        "start": 89.24,
        "duration": 3.32
    },
    {
        "text": "come to your app they've come to your",
        "start": 91.119,
        "duration": 3.04
    },
    {
        "text": "website they type in their email address",
        "start": 92.56,
        "duration": 4.04
    },
    {
        "text": "and we want to say yes or no this email",
        "start": 94.159,
        "duration": 5.0
    },
    {
        "text": "address looks valid all right let me go",
        "start": 96.6,
        "duration": 5.92
    },
    {
        "text": "ahead and type code of validate dopy to",
        "start": 99.159,
        "duration": 5.481
    },
    {
        "text": "create a new tab here and then within",
        "start": 102.52,
        "duration": 3.68
    },
    {
        "text": "this tab let me go ahead and start",
        "start": 104.64,
        "duration": 4.04
    },
    {
        "text": "writing some code how about that keeps",
        "start": 106.2,
        "duration": 4.44
    },
    {
        "text": "things simple initially first let me go",
        "start": 108.68,
        "duration": 3.64
    },
    {
        "text": "ahead and prompt the user for their",
        "start": 110.64,
        "duration": 3.839
    },
    {
        "text": "email address and I'll store the return",
        "start": 112.32,
        "duration": 4.56
    },
    {
        "text": "value of input in a variable called",
        "start": 114.479,
        "duration": 5.521
    },
    {
        "text": "email asking them what's your email",
        "start": 116.88,
        "duration": 4.8
    },
    {
        "text": "question mark I'm going to go ahead and",
        "start": 120.0,
        "duration": 3.28
    },
    {
        "text": "preemptively at least clean up the",
        "start": 121.68,
        "duration": 3.719
    },
    {
        "text": "user's input a little bit by minimally",
        "start": 123.28,
        "duration": 4.839
    },
    {
        "text": "just calling strip at the end of my call",
        "start": 125.399,
        "duration": 5.121
    },
    {
        "text": "to input because recall that input",
        "start": 128.119,
        "duration": 5.401
    },
    {
        "text": "returns a string or a stir stirs come",
        "start": 130.52,
        "duration": 5.04
    },
    {
        "text": "with some built-in methods or functions",
        "start": 133.52,
        "duration": 3.84
    },
    {
        "text": "one of which is strip which has the",
        "start": 135.56,
        "duration": 3.399
    },
    {
        "text": "effect of stripping off any leading",
        "start": 137.36,
        "duration": 3.959
    },
    {
        "text": "white space to the left or any trailing",
        "start": 138.959,
        "duration": 4.081
    },
    {
        "text": "white space to the right so that's just",
        "start": 141.319,
        "duration": 3.64
    },
    {
        "text": "going to go ahead and at least avoid the",
        "start": 143.04,
        "duration": 3.72
    },
    {
        "text": "human having accidentally typed in a",
        "start": 144.959,
        "duration": 3.121
    },
    {
        "text": "space character we're going to throw it",
        "start": 146.76,
        "duration": 3.72
    },
    {
        "text": "away just in case now I'm going to do",
        "start": 148.08,
        "duration": 5.84
    },
    {
        "text": "something simple for a user's input to",
        "start": 150.48,
        "duration": 5.36
    },
    {
        "text": "be an email address I think we can all",
        "start": 153.92,
        "duration": 3.679
    },
    {
        "text": "agree that it's got to minimally have an",
        "start": 155.84,
        "duration": 3.759
    },
    {
        "text": "at sign somewhere in it so let's start",
        "start": 157.599,
        "duration": 3.72
    },
    {
        "text": "simple if the user has typed in",
        "start": 159.599,
        "duration": 3.92
    },
    {
        "text": "something with an at sign let's very",
        "start": 161.319,
        "duration": 4.441
    },
    {
        "text": "generously just say Okay valid looks",
        "start": 163.519,
        "duration": 3.8
    },
    {
        "text": "like an email address and if we're",
        "start": 165.76,
        "duration": 4.04
    },
    {
        "text": "missing that at sign let's say invalid",
        "start": 167.319,
        "duration": 4.081
    },
    {
        "text": "because clearly it's not an email",
        "start": 169.8,
        "duration": 2.92
    },
    {
        "text": "address it's not going to be the best",
        "start": 171.4,
        "duration": 2.919
    },
    {
        "text": "version of my code yet but we'll start",
        "start": 172.72,
        "duration": 3.68
    },
    {
        "text": "simple so I'm going to ask the question",
        "start": 174.319,
        "duration": 5.2
    },
    {
        "text": "if there is an at symbol in the user's",
        "start": 176.4,
        "duration": 5.119
    },
    {
        "text": "email email address go ahead and print",
        "start": 179.519,
        "duration": 4.08
    },
    {
        "text": "out for instance quote unquote valid",
        "start": 181.519,
        "duration": 3.961
    },
    {
        "text": "else if there's not now I'm pretty",
        "start": 183.599,
        "duration": 3.761
    },
    {
        "text": "confident that the email address is in",
        "start": 185.48,
        "duration": 5.24
    },
    {
        "text": "fact invalid now what is this code doing",
        "start": 187.36,
        "duration": 6.84
    },
    {
        "text": "well if at sign in email is a pythonic",
        "start": 190.72,
        "duration": 5.519
    },
    {
        "text": "way of asking is this string quote",
        "start": 194.2,
        "duration": 5.88
    },
    {
        "text": "unquote at in this other string email no",
        "start": 196.239,
        "duration": 5.321
    },
    {
        "text": "matter where it is at the beginning the",
        "start": 200.08,
        "duration": 2.719
    },
    {
        "text": "middle of the end it's going to",
        "start": 201.56,
        "duration": 3.08
    },
    {
        "text": "automatically search through the entire",
        "start": 202.799,
        "duration": 3.921
    },
    {
        "text": "string for you automatically I could do",
        "start": 204.64,
        "duration": 3.56
    },
    {
        "text": "this more verbosely and I could use a",
        "start": 206.72,
        "duration": 3.56
    },
    {
        "text": "for Loop or a while loop and look at",
        "start": 208.2,
        "duration": 3.92
    },
    {
        "text": "every character in The user's email",
        "start": 210.28,
        "duration": 3.679
    },
    {
        "text": "address looking to see if it's an at",
        "start": 212.12,
        "duration": 3.16
    },
    {
        "text": "sign but this is one of the things",
        "start": 213.959,
        "duration": 3.161
    },
    {
        "text": "that's nice about python you can do more",
        "start": 215.28,
        "duration": 4.599
    },
    {
        "text": "with less so just by saying if at quote",
        "start": 217.12,
        "duration": 4.88
    },
    {
        "text": "unquote in email we're achieving that",
        "start": 219.879,
        "duration": 3.801
    },
    {
        "text": "same result we're going to get back true",
        "start": 222.0,
        "duration": 4.12
    },
    {
        "text": "if it's somewhere in there thus valid or",
        "start": 223.68,
        "duration": 4.919
    },
    {
        "text": "false if it is not well let me go ahead",
        "start": 226.12,
        "duration": 4.479
    },
    {
        "text": "now and run this program in my terminal",
        "start": 228.599,
        "duration": 4.64
    },
    {
        "text": "window with python of validate dopy and",
        "start": 230.599,
        "duration": 3.64
    },
    {
        "text": "I'm going to go ahead and give it my",
        "start": 233.239,
        "duration": 4.441
    },
    {
        "text": "email address mailen harvard.edu enter",
        "start": 234.239,
        "duration": 5.241
    },
    {
        "text": "and indeed it's valid looks valid is",
        "start": 237.68,
        "duration": 2.68
    },
    {
        "text": "valid",
        "start": 239.48,
        "duration": 2.64
    },
    {
        "text": "but of course this program is",
        "start": 240.36,
        "duration": 4.56
    },
    {
        "text": "technically broken it's buggy what would",
        "start": 242.12,
        "duration": 5.039
    },
    {
        "text": "be an example input if someone might",
        "start": 244.92,
        "duration": 4.319
    },
    {
        "text": "like to volunteer an answer here that",
        "start": 247.159,
        "duration": 4.16
    },
    {
        "text": "would be considered valid but you and I",
        "start": 249.239,
        "duration": 4.64
    },
    {
        "text": "know it really isn't valid yeah thank",
        "start": 251.319,
        "duration": 4.601
    },
    {
        "text": "you uh well pleas to you can type just",
        "start": 253.879,
        "duration": 4.88
    },
    {
        "text": "to science science and that's it and it",
        "start": 255.92,
        "duration": 5.8
    },
    {
        "text": "still be valid still be valid according",
        "start": 258.759,
        "duration": 5.841
    },
    {
        "text": "to your program but the same exactly",
        "start": 261.72,
        "duration": 5.199
    },
    {
        "text": "we've set a very low bar here in fact if",
        "start": 264.6,
        "duration": 4.76
    },
    {
        "text": "I go ahead and rerun python of validate",
        "start": 266.919,
        "duration": 4.201
    },
    {
        "text": "and I'll just type in one add sign",
        "start": 269.36,
        "duration": 4.2
    },
    {
        "text": "that's it no username no domain name",
        "start": 271.12,
        "duration": 3.88
    },
    {
        "text": "this doesn't really look like an email",
        "start": 273.56,
        "duration": 3.72
    },
    {
        "text": "address but unfortunately my code thinks",
        "start": 275.0,
        "duration": 3.72
    },
    {
        "text": "it in fact is because it's obviously",
        "start": 277.28,
        "duration": 3.759
    },
    {
        "text": "just looking for an at sign alone well",
        "start": 278.72,
        "duration": 4.319
    },
    {
        "text": "how could we improve this well minimally",
        "start": 281.039,
        "duration": 4.641
    },
    {
        "text": "an email address I I think tends to have",
        "start": 283.039,
        "duration": 3.641
    },
    {
        "text": "though this is not actually a",
        "start": 285.68,
        "duration": 3.2
    },
    {
        "text": "requirement tends to have an at sign and",
        "start": 286.68,
        "duration": 4.239
    },
    {
        "text": "a single dot at least maybe somewhere in",
        "start": 288.88,
        "duration": 5.48
    },
    {
        "text": "the domain name so mailen harvard.edu so",
        "start": 290.919,
        "duration": 5.081
    },
    {
        "text": "let's check for that dot as well though",
        "start": 294.36,
        "duration": 3.52
    },
    {
        "text": "again strictly speaking doesn't even",
        "start": 296.0,
        "duration": 3.84
    },
    {
        "text": "have to be that case but I'm going for",
        "start": 297.88,
        "duration": 3.4
    },
    {
        "text": "my own email address at least for now as",
        "start": 299.84,
        "duration": 3.199
    },
    {
        "text": "our test case so let me go ahead and",
        "start": 301.28,
        "duration": 3.84
    },
    {
        "text": "change my code now and say not only if",
        "start": 303.039,
        "duration": 6.72
    },
    {
        "text": "at is an email but also uh dot is in",
        "start": 305.12,
        "duration": 7.0
    },
    {
        "text": "email as well so I'm asking now two",
        "start": 309.759,
        "duration": 4.921
    },
    {
        "text": "questions I have two Boolean Expressions",
        "start": 312.12,
        "duration": 5.4
    },
    {
        "text": "if at in email and I'm anding them",
        "start": 314.68,
        "duration": 5.16
    },
    {
        "text": "together logically this is a logical and",
        "start": 317.52,
        "duration": 4.32
    },
    {
        "text": "so to speak so if it's the case that at",
        "start": 319.84,
        "duration": 5.0
    },
    {
        "text": "is an email and Dot is an email okay now",
        "start": 321.84,
        "duration": 4.88
    },
    {
        "text": "I'm going to go ahead and say valid all",
        "start": 324.84,
        "duration": 3.6
    },
    {
        "text": "right this would still seem to work for",
        "start": 326.72,
        "duration": 3.44
    },
    {
        "text": "my email address let me go ahead and run",
        "start": 328.44,
        "duration": 5.44
    },
    {
        "text": "python of validate dopy maen harbor. edu",
        "start": 330.16,
        "duration": 5.72
    },
    {
        "text": "enter and that of course is valid as",
        "start": 333.88,
        "duration": 4.36
    },
    {
        "text": "expected but here too we can be a little",
        "start": 335.88,
        "duration": 3.92
    },
    {
        "text": "adversarial and type in something",
        "start": 338.24,
        "duration": 3.6
    },
    {
        "text": "nonsensical like at Dot and",
        "start": 339.8,
        "duration": 3.839
    },
    {
        "text": "unfortunately that too is going to be",
        "start": 341.84,
        "duration": 3.919
    },
    {
        "text": "mistaken as valid even though there's",
        "start": 343.639,
        "duration": 4.241
    },
    {
        "text": "still no username domain name or",
        "start": 345.759,
        "duration": 3.601
    },
    {
        "text": "anything like that so I think we need to",
        "start": 347.88,
        "duration": 4.599
    },
    {
        "text": "be a little more methodical here in fact",
        "start": 349.36,
        "duration": 6.76
    },
    {
        "text": "notice that if I do this like this uh",
        "start": 352.479,
        "duration": 5.84
    },
    {
        "text": "the at sign can be anywhere and the dot",
        "start": 356.12,
        "duration": 4.4
    },
    {
        "text": "can be anywhere but if I assuming the",
        "start": 358.319,
        "duration": 3.44
    },
    {
        "text": "user is going to have a traditional",
        "start": 360.52,
        "duration": 3.76
    },
    {
        "text": "domain name like harvard.edu or",
        "start": 361.759,
        "duration": 4.921
    },
    {
        "text": "gmail.com I really want to look for the",
        "start": 364.28,
        "duration": 5.039
    },
    {
        "text": "dot in the domain name only not",
        "start": 366.68,
        "duration": 5.48
    },
    {
        "text": "necessarily just the username so let me",
        "start": 369.319,
        "duration": 4.801
    },
    {
        "text": "go ahead and do this let me go ahead and",
        "start": 372.16,
        "duration": 4.599
    },
    {
        "text": "introduce a bit more logic here and",
        "start": 374.12,
        "duration": 5.84
    },
    {
        "text": "instead do this let me go ahead and do",
        "start": 376.759,
        "duration": 4.321
    },
    {
        "text": "uh",
        "start": 379.96,
        "duration": 4.239
    },
    {
        "text": "email.it of quote unquote at sign so",
        "start": 381.08,
        "duration": 6.04
    },
    {
        "text": "email again is a string or a stir stirs",
        "start": 384.199,
        "duration": 5.0
    },
    {
        "text": "come with methods not just strip but",
        "start": 387.12,
        "duration": 4.16
    },
    {
        "text": "also another one called split that as",
        "start": 389.199,
        "duration": 4.321
    },
    {
        "text": "the name applies will split one stir",
        "start": 391.28,
        "duration": 3.96
    },
    {
        "text": "into multiple ones if you give it a",
        "start": 393.52,
        "duration": 5.92
    },
    {
        "text": "character or more to split on so this is",
        "start": 395.24,
        "duration": 5.679
    },
    {
        "text": "hopefully going to return to me two",
        "start": 399.44,
        "duration": 3.199
    },
    {
        "text": "parts from a traditional email address",
        "start": 400.919,
        "duration": 4.161
    },
    {
        "text": "the username and the domain name and it",
        "start": 402.639,
        "duration": 4.601
    },
    {
        "text": "turns out I can unpack that sequence of",
        "start": 405.08,
        "duration": 5.36
    },
    {
        "text": "responses by doing this username comma",
        "start": 407.24,
        "duration": 6.12
    },
    {
        "text": "domain equals this I could store it in a",
        "start": 410.44,
        "duration": 5.12
    },
    {
        "text": "list or some other structure but if I",
        "start": 413.36,
        "duration": 4.16
    },
    {
        "text": "already know in advance what kinds of",
        "start": 415.56,
        "duration": 3.479
    },
    {
        "text": "values I'm expecting a username and",
        "start": 417.52,
        "duration": 3.32
    },
    {
        "text": "hopefully a domain I'm going to go ahead",
        "start": 419.039,
        "duration": 3.201
    },
    {
        "text": "and do it like this instead and just",
        "start": 420.84,
        "duration": 3.72
    },
    {
        "text": "Define two variables at once on one line",
        "start": 422.24,
        "duration": 4.04
    },
    {
        "text": "of code and now I'm going to be a little",
        "start": 424.56,
        "duration": 3.72
    },
    {
        "text": "more precise if",
        "start": 426.28,
        "duration": 6.24
    },
    {
        "text": "username uh uh if username then I'm",
        "start": 428.28,
        "duration": 7.12
    },
    {
        "text": "going to go ahead and say print valid",
        "start": 432.52,
        "duration": 5.32
    },
    {
        "text": "else I'm going to go ahead and say print",
        "start": 435.4,
        "duration": 4.68
    },
    {
        "text": "invalid now this isn't good enough but",
        "start": 437.84,
        "duration": 3.84
    },
    {
        "text": "I'm at least checking for the presence",
        "start": 440.08,
        "duration": 3.119
    },
    {
        "text": "of a username now and you might not have",
        "start": 441.68,
        "duration": 3.359
    },
    {
        "text": "seen this before but if you simply ask a",
        "start": 443.199,
        "duration": 4.4
    },
    {
        "text": "question like if username and username",
        "start": 445.039,
        "duration": 5.521
    },
    {
        "text": "is a string well usern if username is",
        "start": 447.599,
        "duration": 5.16
    },
    {
        "text": "going to give me a true answer if",
        "start": 450.56,
        "duration": 4.759
    },
    {
        "text": "username is anything except none or",
        "start": 452.759,
        "duration": 5.041
    },
    {
        "text": "quote unquote nothing so there's a a",
        "start": 455.319,
        "duration": 4.921
    },
    {
        "text": "truthy value here whereby if username",
        "start": 457.8,
        "duration": 4.36
    },
    {
        "text": "has at least one character that's going",
        "start": 460.24,
        "duration": 3.799
    },
    {
        "text": "to be considered true but if username",
        "start": 462.16,
        "duration": 4.24
    },
    {
        "text": "has no characters it's going to be",
        "start": 464.039,
        "duration": 5.44
    },
    {
        "text": "considered a false value effectively but",
        "start": 466.4,
        "duration": 4.32
    },
    {
        "text": "this isn't good enough I don't want to",
        "start": 469.479,
        "duration": 2.961
    },
    {
        "text": "just check for username I want to also",
        "start": 470.72,
        "duration": 4.72
    },
    {
        "text": "check that it's the case that dot is in",
        "start": 472.44,
        "duration": 5.52
    },
    {
        "text": "the domain name as well so notice here",
        "start": 475.44,
        "duration": 4.68
    },
    {
        "text": "there's a bit of potential confusion",
        "start": 477.96,
        "duration": 4.76
    },
    {
        "text": "with the English language here I seem to",
        "start": 480.12,
        "duration": 5.479
    },
    {
        "text": "be saying if username and Dot in domain",
        "start": 482.72,
        "duration": 5.039
    },
    {
        "text": "as though I'm asking the question if the",
        "start": 485.599,
        "duration": 5.481
    },
    {
        "text": "username and the dot are in the domain",
        "start": 487.759,
        "duration": 4.761
    },
    {
        "text": "but that's not what this means these are",
        "start": 491.08,
        "duration": 3.559
    },
    {
        "text": "two separate Boolean Expressions if",
        "start": 492.52,
        "duration": 4.0
    },
    {
        "text": "username and",
        "start": 494.639,
        "duration": 5.441
    },
    {
        "text": "separately if dot in domain and if I",
        "start": 496.52,
        "duration": 5.079
    },
    {
        "text": "parenthesize this we could make that",
        "start": 500.08,
        "duration": 3.6
    },
    {
        "text": "even more clear by putting parentheses",
        "start": 501.599,
        "duration": 3.88
    },
    {
        "text": "there parentheses here so just to be",
        "start": 503.68,
        "duration": 3.199
    },
    {
        "text": "clear it's really two Boolean",
        "start": 505.479,
        "duration": 2.961
    },
    {
        "text": "Expressions that we're ending together",
        "start": 506.879,
        "duration": 4.16
    },
    {
        "text": "not one longer english-like sentence now",
        "start": 508.44,
        "duration": 5.36
    },
    {
        "text": "if I go ahead and run this python of",
        "start": 511.039,
        "duration": 5.601
    },
    {
        "text": "validate dopy enter I'll do my own email",
        "start": 513.8,
        "duration": 5.0
    },
    {
        "text": "address again mailin harvard.edu and",
        "start": 516.64,
        "duration": 5.72
    },
    {
        "text": "that's valid and it looks like I could",
        "start": 518.8,
        "duration": 5.239
    },
    {
        "text": "tolerate something like this if I do",
        "start": 522.36,
        "duration": 4.919
    },
    {
        "text": "mailin at just say Harvard I think at",
        "start": 524.039,
        "duration": 5.36
    },
    {
        "text": "the moment this is going to be invalid",
        "start": 527.279,
        "duration": 4.481
    },
    {
        "text": "now maybe the top level domain Harvard",
        "start": 529.399,
        "duration": 4.241
    },
    {
        "text": "exists but at the moment it looks like",
        "start": 531.76,
        "duration": 3.24
    },
    {
        "text": "we're looking for something more we're",
        "start": 533.64,
        "duration": 3.72
    },
    {
        "text": "looking for a top level domain too like",
        "start": 535.0,
        "duration": 4.6
    },
    {
        "text": "edu so for now we'll just consider for",
        "start": 537.36,
        "duration": 5.479
    },
    {
        "text": "this to be invalid but it's not just",
        "start": 539.6,
        "duration": 6.08
    },
    {
        "text": "that we want to do it's not just that we",
        "start": 542.839,
        "duration": 3.961
    },
    {
        "text": "want to check for the presence of a",
        "start": 545.68,
        "duration": 2.92
    },
    {
        "text": "username and the presence of a dot let's",
        "start": 546.8,
        "duration": 3.279
    },
    {
        "text": "be more specific let's start to now",
        "start": 548.6,
        "duration": 2.919
    },
    {
        "text": "narrow the scope of this program not",
        "start": 550.079,
        "duration": 3.041
    },
    {
        "text": "just to be about generic emails more",
        "start": 551.519,
        "duration": 4.32
    },
    {
        "text": "generally but about edu addresses so",
        "start": 553.12,
        "duration": 4.56
    },
    {
        "text": "specifically for someone in a US",
        "start": 555.839,
        "duration": 3.281
    },
    {
        "text": "University for instance whose email",
        "start": 557.68,
        "duration": 4.399
    },
    {
        "text": "address tends to end with doedu I can be",
        "start": 559.12,
        "duration": 4.52
    },
    {
        "text": "a little more precise and you might",
        "start": 562.079,
        "duration": 3.841
    },
    {
        "text": "recall this function already instead of",
        "start": 563.64,
        "duration": 4.24
    },
    {
        "text": "just saying is there a DOT somewhere in",
        "start": 565.92,
        "duration": 5.359
    },
    {
        "text": "domain let me instead say and the domain",
        "start": 567.88,
        "duration": 6.92
    },
    {
        "text": "ends with quote unquote. edu so now",
        "start": 571.279,
        "duration": 5.361
    },
    {
        "text": "we're being even more precise we want",
        "start": 574.8,
        "duration": 3.68
    },
    {
        "text": "there to be minimally a username that's",
        "start": 576.64,
        "duration": 3.96
    },
    {
        "text": "not empty it's not just quote unquote",
        "start": 578.48,
        "duration": 4.359
    },
    {
        "text": "nothing and we want the domain name to",
        "start": 580.6,
        "duration": 5.32
    },
    {
        "text": "actually end with doedu let me go ahead",
        "start": 582.839,
        "duration": 5.161
    },
    {
        "text": "and run python of validate dopy and just",
        "start": 585.92,
        "duration": 3.4
    },
    {
        "text": "to make sure I haven't made things even",
        "start": 588.0,
        "duration": 3.2
    },
    {
        "text": "worse let me at least chest my own email",
        "start": 589.32,
        "duration": 4.32
    },
    {
        "text": "address which does seem to be valid now",
        "start": 591.2,
        "duration": 3.879
    },
    {
        "text": "it seems that I minimally need to",
        "start": 593.64,
        "duration": 3.12
    },
    {
        "text": "provide a username because we definitely",
        "start": 595.079,
        "duration": 3.601
    },
    {
        "text": "do have that check in place so I'm going",
        "start": 596.76,
        "duration": 4.079
    },
    {
        "text": "to go ahead and say mailin and now I'm",
        "start": 598.68,
        "duration": 4.56
    },
    {
        "text": "going to go ahead and say at and it",
        "start": 600.839,
        "duration": 4.721
    },
    {
        "text": "looks like I could be a little malicious",
        "start": 603.24,
        "duration": 4.839
    },
    {
        "text": "here just say maen at.edu as though",
        "start": 605.56,
        "duration": 4.279
    },
    {
        "text": "minimally meeting the requirements of",
        "start": 608.079,
        "duration": 3.961
    },
    {
        "text": "this of this pattern and that of course",
        "start": 609.839,
        "duration": 4.401
    },
    {
        "text": "is considered valid but I'm pretty sure",
        "start": 612.04,
        "duration": 5.44
    },
    {
        "text": "there's no one at mailin at.edu we need",
        "start": 614.24,
        "duration": 5.279
    },
    {
        "text": "to have some domain name in there so",
        "start": 617.48,
        "duration": 3.919
    },
    {
        "text": "we're still not being quite as generous",
        "start": 619.519,
        "duration": 3.481
    },
    {
        "text": "now we could absolutely continue to",
        "start": 621.399,
        "duration": 3.68
    },
    {
        "text": "iterate on this program and we could add",
        "start": 623.0,
        "duration": 3.76
    },
    {
        "text": "some more Boolean Expressions we could",
        "start": 625.079,
        "duration": 3.681
    },
    {
        "text": "maybe use some other python methods for",
        "start": 626.76,
        "duration": 3.48
    },
    {
        "text": "checking more precisely is there's",
        "start": 628.76,
        "duration": 3.0
    },
    {
        "text": "something to the left of the dot to the",
        "start": 630.24,
        "duration": 3.279
    },
    {
        "text": "right of the dot we could use split",
        "start": 631.76,
        "duration": 3.4
    },
    {
        "text": "multiple times but honestly this just",
        "start": 633.519,
        "duration": 3.481
    },
    {
        "text": "escalates quickly like you end up having",
        "start": 635.16,
        "duration": 4.88
    },
    {
        "text": "to write a lot of code just to express",
        "start": 637.0,
        "duration": 4.8
    },
    {
        "text": "something that's relatively simple in",
        "start": 640.04,
        "duration": 4.76
    },
    {
        "text": "spirit just format this like an email",
        "start": 641.8,
        "duration": 5.68
    },
    {
        "text": "address so how can we go about improving",
        "start": 644.8,
        "duration": 4.92
    },
    {
        "text": "this well it turns out in Python there's",
        "start": 647.48,
        "duration": 4.919
    },
    {
        "text": "a library for regular Expressions it's",
        "start": 649.72,
        "duration": 5.359
    },
    {
        "text": "called succinctly re and in the re",
        "start": 652.399,
        "duration": 4.761
    },
    {
        "text": "Library you have a lot of capabilities",
        "start": 655.079,
        "duration": 5.721
    },
    {
        "text": "to Define and check for and even replace",
        "start": 657.16,
        "duration": 5.88
    },
    {
        "text": "patterns again a regular expression is a",
        "start": 660.8,
        "duration": 4.8
    },
    {
        "text": "pattern and this Library the re library",
        "start": 663.04,
        "duration": 4.039
    },
    {
        "text": "in Python is going to let us to Define",
        "start": 665.6,
        "duration": 2.84
    },
    {
        "text": "some of these patterns like a pattern",
        "start": 667.079,
        "duration": 3.041
    },
    {
        "text": "for an email address and then use some",
        "start": 668.44,
        "duration": 4.12
    },
    {
        "text": "built-in functions to actually validate",
        "start": 670.12,
        "duration": 4.399
    },
    {
        "text": "a user's input against that pattern or",
        "start": 672.56,
        "duration": 3.92
    },
    {
        "text": "even use these patterns to change the",
        "start": 674.519,
        "duration": 4.0
    },
    {
        "text": "user's input or extract partial",
        "start": 676.48,
        "duration": 3.4
    },
    {
        "text": "information there from we'll see",
        "start": 678.519,
        "duration": 4.12
    },
    {
        "text": "examples of all this and more so what",
        "start": 679.88,
        "duration": 4.48
    },
    {
        "text": "can and should I do with this Library",
        "start": 682.639,
        "duration": 3.041
    },
    {
        "text": "well first and foremost it comes with a",
        "start": 684.36,
        "duration": 3.159
    },
    {
        "text": "lot of functionality here's the URL for",
        "start": 685.68,
        "duration": 4.12
    },
    {
        "text": "instance to the official documentation",
        "start": 687.519,
        "duration": 3.721
    },
    {
        "text": "and let me propose that we focus on",
        "start": 689.8,
        "duration": 3.24
    },
    {
        "text": "using one of the most versatile",
        "start": 691.24,
        "duration": 4.039
    },
    {
        "text": "functions in the library library namely",
        "start": 693.04,
        "duration": 5.599
    },
    {
        "text": "this search re. search is the name of",
        "start": 695.279,
        "duration": 5.441
    },
    {
        "text": "the function in the re module that",
        "start": 698.639,
        "duration": 4.121
    },
    {
        "text": "allows you to pass in a few arguments",
        "start": 700.72,
        "duration": 3.96
    },
    {
        "text": "the first is going to be a pattern that",
        "start": 702.76,
        "duration": 4.48
    },
    {
        "text": "you want to search for in for instance a",
        "start": 704.68,
        "duration": 5.12
    },
    {
        "text": "string that came from a user the string",
        "start": 707.24,
        "duration": 4.24
    },
    {
        "text": "argument here is going to be the actual",
        "start": 709.8,
        "duration": 3.039
    },
    {
        "text": "string that you want to search for that",
        "start": 711.48,
        "duration": 2.84
    },
    {
        "text": "pattern and then there's a third",
        "start": 712.839,
        "duration": 3.12
    },
    {
        "text": "argument optionally that's a whole bunch",
        "start": 714.32,
        "duration": 4.28
    },
    {
        "text": "of flags a flag in general is like a a",
        "start": 715.959,
        "duration": 4.641
    },
    {
        "text": "parameter you can can pass in to modify",
        "start": 718.6,
        "duration": 3.28
    },
    {
        "text": "the behavior of the function but",
        "start": 720.6,
        "duration": 2.64
    },
    {
        "text": "initially we're not even going to use",
        "start": 721.88,
        "duration": 2.759
    },
    {
        "text": "this we're just going to pass in a",
        "start": 723.24,
        "duration": 4.08
    },
    {
        "text": "couple of arguments instead so let me go",
        "start": 724.639,
        "duration": 6.161
    },
    {
        "text": "ahead and employ this re Library this",
        "start": 727.32,
        "duration": 5.84
    },
    {
        "text": "regular expression library and just",
        "start": 730.8,
        "duration": 4.56
    },
    {
        "text": "improve on this design incrementally so",
        "start": 733.16,
        "duration": 3.44
    },
    {
        "text": "we're not going to solve this problem",
        "start": 735.36,
        "duration": 2.919
    },
    {
        "text": "all at once but we'll take some",
        "start": 736.6,
        "duration": 3.679
    },
    {
        "text": "incremental steps I'm going to go back",
        "start": 738.279,
        "duration": 4.321
    },
    {
        "text": "to VSS code here and I'm going to go",
        "start": 740.279,
        "duration": 4.281
    },
    {
        "text": "ahead now and get rid of most of this",
        "start": 742.6,
        "duration": 3.96
    },
    {
        "text": "code but I'm going to go into the top of",
        "start": 744.56,
        "duration": 4.92
    },
    {
        "text": "my file and first and all import this re",
        "start": 746.56,
        "duration": 5.2
    },
    {
        "text": "Library so import re gives me access to",
        "start": 749.48,
        "duration": 4.359
    },
    {
        "text": "that function and more now after I've",
        "start": 751.76,
        "duration": 3.72
    },
    {
        "text": "gotten the user's input in the same way",
        "start": 753.839,
        "duration": 3.641
    },
    {
        "text": "as before stripping off any leading or",
        "start": 755.48,
        "duration": 3.88
    },
    {
        "text": "trailing whitespace I'm just going to",
        "start": 757.48,
        "duration": 4.2
    },
    {
        "text": "use this function super trivially for",
        "start": 759.36,
        "duration": 4.159
    },
    {
        "text": "now even though this isn't really a big",
        "start": 761.68,
        "duration": 5.04
    },
    {
        "text": "step forward I'm going to say if re.",
        "start": 763.519,
        "duration": 6.921
    },
    {
        "text": "search contains quote unquote at in the",
        "start": 766.72,
        "duration": 5.72
    },
    {
        "text": "email address then let's go ahead and",
        "start": 770.44,
        "duration": 4.24
    },
    {
        "text": "print valid else let's go ahead and",
        "start": 772.44,
        "duration": 4.6
    },
    {
        "text": "print invalid at the moment this is",
        "start": 774.68,
        "duration": 4.56
    },
    {
        "text": "really no better than my very first",
        "start": 777.04,
        "duration": 4.239
    },
    {
        "text": "version where I was just asking python",
        "start": 779.24,
        "duration": 5.599
    },
    {
        "text": "if at sign in the email address but now",
        "start": 781.279,
        "duration": 5.081
    },
    {
        "text": "I'm at least beginning to use this",
        "start": 784.839,
        "duration": 3.961
    },
    {
        "text": "Library by using its own re. search",
        "start": 786.36,
        "duration": 4.479
    },
    {
        "text": "function which for now you can assume",
        "start": 788.8,
        "duration": 5.479
    },
    {
        "text": "returns a a True Value effectively if",
        "start": 790.839,
        "duration": 6.041
    },
    {
        "text": "indeed the at sign is an email just to",
        "start": 794.279,
        "duration": 4.481
    },
    {
        "text": "make sure that this version does work as",
        "start": 796.88,
        "duration": 3.56
    },
    {
        "text": "I expect let me go ahead and run python",
        "start": 798.76,
        "duration": 4.28
    },
    {
        "text": "of validate dopy and enter I'll type in",
        "start": 800.44,
        "duration": 5.0
    },
    {
        "text": "my actual email address and we're back",
        "start": 803.04,
        "duration": 4.64
    },
    {
        "text": "in business but of course this is not",
        "start": 805.44,
        "duration": 4.16
    },
    {
        "text": "great because if I similar Lally run",
        "start": 807.68,
        "duration": 3.48
    },
    {
        "text": "this version of the program and just",
        "start": 809.6,
        "duration": 3.76
    },
    {
        "text": "type in an at sign not an email address",
        "start": 811.16,
        "duration": 3.919
    },
    {
        "text": "and yet my code of course thinks it is",
        "start": 813.36,
        "duration": 4.68
    },
    {
        "text": "valid so how can I do better than this",
        "start": 815.079,
        "duration": 5.56
    },
    {
        "text": "well we need a bit more vocabulary in",
        "start": 818.04,
        "duration": 4.4
    },
    {
        "text": "the realm of regular expressions in",
        "start": 820.639,
        "duration": 4.281
    },
    {
        "text": "order to be able to express ourselves a",
        "start": 822.44,
        "duration": 5.0
    },
    {
        "text": "little more precisely really the pattern",
        "start": 824.92,
        "duration": 4.4
    },
    {
        "text": "I want to ultimately Define is going to",
        "start": 827.44,
        "duration": 3.72
    },
    {
        "text": "be something like I want there to be",
        "start": 829.32,
        "duration": 4.439
    },
    {
        "text": "something to the left then an at sign",
        "start": 831.16,
        "duration": 4.44
    },
    {
        "text": "then something to the right and that",
        "start": 833.759,
        "duration": 3.841
    },
    {
        "text": "something to the right should end with",
        "start": 835.6,
        "duration": 4.0
    },
    {
        "text": "edu but should also have something",
        "start": 837.6,
        "duration": 4.64
    },
    {
        "text": "before the edu like Harvard or Yale or",
        "start": 839.6,
        "duration": 5.4
    },
    {
        "text": "any other school in the US as well well",
        "start": 842.24,
        "duration": 4.48
    },
    {
        "text": "how can I go about doing this well it",
        "start": 845.0,
        "duration": 4.32
    },
    {
        "text": "turns out that in the world of regular",
        "start": 846.72,
        "duration": 4.679
    },
    {
        "text": "Expressions whether in python or a lot",
        "start": 849.32,
        "duration": 3.879
    },
    {
        "text": "of other languages as well there's",
        "start": 851.399,
        "duration": 3.481
    },
    {
        "text": "certain symbols that you can use to",
        "start": 853.199,
        "duration": 4.08
    },
    {
        "text": "define patterns at the moment I've just",
        "start": 854.88,
        "duration": 4.879
    },
    {
        "text": "used literal raw text if I go back to my",
        "start": 857.279,
        "duration": 5.12
    },
    {
        "text": "code here this technically qualifies as",
        "start": 859.759,
        "duration": 5.561
    },
    {
        "text": "a regular expression I've passed in a",
        "start": 862.399,
        "duration": 5.521
    },
    {
        "text": "quoted string inside of which is an at",
        "start": 865.32,
        "duration": 4.72
    },
    {
        "text": "sign now that's not a very interesting",
        "start": 867.92,
        "duration": 3.839
    },
    {
        "text": "pattern it's just an at sign but it",
        "start": 870.04,
        "duration": 3.28
    },
    {
        "text": "turns out that once you have access to",
        "start": 871.759,
        "duration": 3.401
    },
    {
        "text": "regular expressions or a library that",
        "start": 873.32,
        "duration": 4.079
    },
    {
        "text": "offers that feature you can more",
        "start": 875.16,
        "duration": 5.239
    },
    {
        "text": "powerfully express yourself as follows",
        "start": 877.399,
        "duration": 4.841
    },
    {
        "text": "let me reveal that the pattern that you",
        "start": 880.399,
        "duration": 4.081
    },
    {
        "text": "passed to re. search can take a whole",
        "start": 882.24,
        "duration": 4.08
    },
    {
        "text": "bunch of special symbols and here's just",
        "start": 884.48,
        "duration": 3.919
    },
    {
        "text": "some of them in the examples we're about",
        "start": 886.32,
        "duration": 4.4
    },
    {
        "text": "to see in the patterns we're about to",
        "start": 888.399,
        "duration": 4.841
    },
    {
        "text": "Define here are the special symbols you",
        "start": 890.72,
        "duration": 4.96
    },
    {
        "text": "can use a single period a DOT to just",
        "start": 893.24,
        "duration": 4.599
    },
    {
        "text": "represent any character except a new",
        "start": 895.68,
        "duration": 4.399
    },
    {
        "text": "line a blank line so that is to say if I",
        "start": 897.839,
        "duration": 3.8
    },
    {
        "text": "don't really care what letters of the",
        "start": 900.079,
        "duration": 3.601
    },
    {
        "text": "alphabet are in the user's username I",
        "start": 901.639,
        "duration": 3.521
    },
    {
        "text": "just want there to be one or more",
        "start": 903.68,
        "duration": 4.2
    },
    {
        "text": "characters uh in the user's name dot",
        "start": 905.16,
        "duration": 4.84
    },
    {
        "text": "allows me to express a through z",
        "start": 907.88,
        "duration": 4.0
    },
    {
        "text": "uppercase and lowercase and a bunch of",
        "start": 910.0,
        "duration": 5.16
    },
    {
        "text": "other letters as well star is going to",
        "start": 911.88,
        "duration": 5.959
    },
    {
        "text": "mean in single asterisk zero or more",
        "start": 915.16,
        "duration": 5.599
    },
    {
        "text": "repetitions so if I say something star",
        "start": 917.839,
        "duration": 4.68
    },
    {
        "text": "that means that I'm willing to accept",
        "start": 920.759,
        "duration": 4.08
    },
    {
        "text": "either zero repetitions that is nothing",
        "start": 922.519,
        "duration": 5.76
    },
    {
        "text": "at all or more repetitions one or two or",
        "start": 924.839,
        "duration": 4.881
    },
    {
        "text": "three or 300",
        "start": 928.279,
        "duration": 3.56
    },
    {
        "text": "if you see a plus in my patterns that's",
        "start": 929.72,
        "duration": 4.4
    },
    {
        "text": "going to mean one or more repetitions",
        "start": 931.839,
        "duration": 3.24
    },
    {
        "text": "that is to say there's got to be at",
        "start": 934.12,
        "duration": 3.279
    },
    {
        "text": "least one character there one symbol and",
        "start": 935.079,
        "duration": 5.161
    },
    {
        "text": "then there's optionally more after that",
        "start": 937.399,
        "duration": 4.92
    },
    {
        "text": "and then you can say zero or one",
        "start": 940.24,
        "duration": 4.039
    },
    {
        "text": "repetition you can use a single question",
        "start": 942.319,
        "duration": 4.361
    },
    {
        "text": "mark after a symbol and that will say I",
        "start": 944.279,
        "duration": 5.441
    },
    {
        "text": "want zero of this character or one but",
        "start": 946.68,
        "duration": 5.56
    },
    {
        "text": "that's all I'll expect and then lastly",
        "start": 949.72,
        "duration": 3.919
    },
    {
        "text": "there's going to be a way to specify a",
        "start": 952.24,
        "duration": 3.24
    },
    {
        "text": "specific number of symbols if you use",
        "start": 953.639,
        "duration": 3.68
    },
    {
        "text": "these curly braces and a number",
        "start": 955.48,
        "duration": 3.88
    },
    {
        "text": "represented here symbolically as m you",
        "start": 957.319,
        "duration": 4.161
    },
    {
        "text": "can specify that you want M repetitions",
        "start": 959.36,
        "duration": 4.56
    },
    {
        "text": "be it one or two or three or 300 you can",
        "start": 961.48,
        "duration": 4.0
    },
    {
        "text": "specify the number of repetitions",
        "start": 963.92,
        "duration": 3.32
    },
    {
        "text": "yourself and if you want a range of",
        "start": 965.48,
        "duration": 3.68
    },
    {
        "text": "repetitions like you want this few",
        "start": 967.24,
        "duration": 4.0
    },
    {
        "text": "characters or this many characters you",
        "start": 969.16,
        "duration": 4.039
    },
    {
        "text": "can use curly braces and two numbers",
        "start": 971.24,
        "duration": 4.44
    },
    {
        "text": "inside called here M and N which would",
        "start": 973.199,
        "duration": 5.481
    },
    {
        "text": "be a range of M through n repetitions",
        "start": 975.68,
        "duration": 4.519
    },
    {
        "text": "now what does all of this mean well let",
        "start": 978.68,
        "duration": 3.76
    },
    {
        "text": "me go back to vs code here and let me",
        "start": 980.199,
        "duration": 4.76
    },
    {
        "text": "propose that we iterate on this solution",
        "start": 982.44,
        "duration": 4.519
    },
    {
        "text": "further it's not sufficient to just",
        "start": 984.959,
        "duration": 3.44
    },
    {
        "text": "check for the at sign we know that",
        "start": 986.959,
        "duration": 3.081
    },
    {
        "text": "already we minimally want something to",
        "start": 988.399,
        "duration": 3.92
    },
    {
        "text": "the left and to the right so how can I",
        "start": 990.04,
        "duration": 4.32
    },
    {
        "text": "represent that I don't really care what",
        "start": 992.319,
        "duration": 4.32
    },
    {
        "text": "the user's username is or what letters",
        "start": 994.36,
        "duration": 4.56
    },
    {
        "text": "of the alphabet are in it be it men or",
        "start": 996.639,
        "duration": 4.361
    },
    {
        "text": "anyone else's so what I'm going to do to",
        "start": 998.92,
        "duration": 3.919
    },
    {
        "text": "the left of this equal sign is I'm going",
        "start": 1001.0,
        "duration": 4.72
    },
    {
        "text": "to use a single period the dot that",
        "start": 1002.839,
        "duration": 5.68
    },
    {
        "text": "again indicates any character except for",
        "start": 1005.72,
        "duration": 4.88
    },
    {
        "text": "a new line but I don't just want a",
        "start": 1008.519,
        "duration": 4.0
    },
    {
        "text": "single character otherwise the P",
        "start": 1010.6,
        "duration": 4.44
    },
    {
        "text": "person's username could only be a at",
        "start": 1012.519,
        "duration": 5.12
    },
    {
        "text": "such and such or B at such and such I",
        "start": 1015.04,
        "duration": 4.919
    },
    {
        "text": "want it to be multiple such characters",
        "start": 1017.639,
        "duration": 4.68
    },
    {
        "text": "so I'm going to initially use a star so",
        "start": 1019.959,
        "duration": 4.201
    },
    {
        "text": "star means give me something to the left",
        "start": 1022.319,
        "duration": 4.0
    },
    {
        "text": "and I'm going to do another one star",
        "start": 1024.16,
        "duration": 4.48
    },
    {
        "text": "something to the right now this isn't",
        "start": 1026.319,
        "duration": 4.281
    },
    {
        "text": "perfect but it's at least a step forward",
        "start": 1028.64,
        "duration": 3.159
    },
    {
        "text": "because now what I'm going to go ahead",
        "start": 1030.6,
        "duration": 3.199
    },
    {
        "text": "and do is this I'm going to rerun python",
        "start": 1031.799,
        "duration": 3.961
    },
    {
        "text": "to validate I'm going to keep testing my",
        "start": 1033.799,
        "duration": 3.361
    },
    {
        "text": "own email address just to make sure I",
        "start": 1035.76,
        "duration": 3.4
    },
    {
        "text": "haven't made things worse and that's now",
        "start": 1037.16,
        "duration": 4.0
    },
    {
        "text": "okay I'm now going to go ahead and type",
        "start": 1039.16,
        "duration": 5.48
    },
    {
        "text": "in some other input like how about just",
        "start": 1041.16,
        "duration": 6.44
    },
    {
        "text": "uh mailin at with no domain name",
        "start": 1044.64,
        "duration": 4.56
    },
    {
        "text": "whatsoever and you would think this is",
        "start": 1047.6,
        "duration": 5.16
    },
    {
        "text": "going to be invalid but but but it's",
        "start": 1049.2,
        "duration": 6.599
    },
    {
        "text": "still considered valid but why is that",
        "start": 1052.76,
        "duration": 6.0
    },
    {
        "text": "if I go back to this chart why is maen",
        "start": 1055.799,
        "duration": 7.601
    },
    {
        "text": "at with no domain now considered valid",
        "start": 1058.76,
        "duration": 8.12
    },
    {
        "text": "what's my mistake here by having used",
        "start": 1063.4,
        "duration": 6.48
    },
    {
        "text": "star at. star as my regular expression",
        "start": 1066.88,
        "duration": 5.56
    },
    {
        "text": "or Rex because you're using the star",
        "start": 1069.88,
        "duration": 5.44
    },
    {
        "text": "instead of the plus sign exactly the",
        "start": 1072.44,
        "duration": 4.84
    },
    {
        "text": "star again means zero or more",
        "start": 1075.32,
        "duration": 4.8
    },
    {
        "text": "repetitions so re e. search is perfectly",
        "start": 1077.28,
        "duration": 4.92
    },
    {
        "text": "happy to accept nothing after the equ",
        "start": 1080.12,
        "duration": 3.84
    },
    {
        "text": "after the at sign because that would be",
        "start": 1082.2,
        "duration": 4.04
    },
    {
        "text": "zero repetitions so I think I minimally",
        "start": 1083.96,
        "duration": 4.24
    },
    {
        "text": "need to evolve this and go back to my",
        "start": 1086.24,
        "duration": 3.88
    },
    {
        "text": "code here and let me go ahead and change",
        "start": 1088.2,
        "duration": 5.64
    },
    {
        "text": "this from Star to plus and let me change",
        "start": 1090.12,
        "duration": 7.16
    },
    {
        "text": "the ending from Star to plus so that now",
        "start": 1093.84,
        "duration": 5.64
    },
    {
        "text": "when I run my code here let me go ahead",
        "start": 1097.28,
        "duration": 4.279
    },
    {
        "text": "and run python of validate dopy I'm",
        "start": 1099.48,
        "duration": 4.16
    },
    {
        "text": "going to test my email addresses always",
        "start": 1101.559,
        "duration": 4.24
    },
    {
        "text": "still working now let me go ahead and",
        "start": 1103.64,
        "duration": 4.0
    },
    {
        "text": "type in that same thing from before that",
        "start": 1105.799,
        "duration": 4.481
    },
    {
        "text": "was accidentally considered valid now I",
        "start": 1107.64,
        "duration": 5.24
    },
    {
        "text": "hit enter finally it's invalid so now",
        "start": 1110.28,
        "duration": 4.639
    },
    {
        "text": "we're making some progress on being a",
        "start": 1112.88,
        "duration": 3.88
    },
    {
        "text": "little more precise as to what it is",
        "start": 1114.919,
        "duration": 4.081
    },
    {
        "text": "we're doing now I'll note here like with",
        "start": 1116.76,
        "duration": 4.56
    },
    {
        "text": "almost everything in programming python",
        "start": 1119.0,
        "duration": 4.44
    },
    {
        "text": "included there's often multiple ways to",
        "start": 1121.32,
        "duration": 4.88
    },
    {
        "text": "solve the same problem and does anyone",
        "start": 1123.44,
        "duration": 6.359
    },
    {
        "text": "see a way in my code here that I could",
        "start": 1126.2,
        "duration": 6.56
    },
    {
        "text": "make a slight tweak if I forgot that the",
        "start": 1129.799,
        "duration": 5.521
    },
    {
        "text": "plus operator exists and go back to",
        "start": 1132.76,
        "duration": 5.48
    },
    {
        "text": "using a star if I allowed you only to",
        "start": 1135.32,
        "duration": 5.8
    },
    {
        "text": "use Dot and only Stars could you",
        "start": 1138.24,
        "duration": 6.76
    },
    {
        "text": "recreate the notion of plus yes um use",
        "start": 1141.12,
        "duration": 6.76
    },
    {
        "text": "another dot dot dot star yeah because if",
        "start": 1145.0,
        "duration": 4.64
    },
    {
        "text": "a DOT means any character we'll just use",
        "start": 1147.88,
        "duration": 3.679
    },
    {
        "text": "a DOT and then when you want to say or",
        "start": 1149.64,
        "duration": 4.36
    },
    {
        "text": "more use another Dot and then the star",
        "start": 1151.559,
        "duration": 5.0
    },
    {
        "text": "so equivalent to dot plus would have",
        "start": 1154.0,
        "duration": 5.28
    },
    {
        "text": "been dot dotar because the first dot",
        "start": 1156.559,
        "duration": 5.161
    },
    {
        "text": "means any character and the second pair",
        "start": 1159.28,
        "duration": 5.0
    },
    {
        "text": "of characters dotar means zero or more",
        "start": 1161.72,
        "duration": 4.28
    },
    {
        "text": "other characters and to be clear it does",
        "start": 1164.28,
        "duration": 3.44
    },
    {
        "text": "not have to be the same character just",
        "start": 1166.0,
        "duration": 4.0
    },
    {
        "text": "by doing Dot or Dot star does not mean",
        "start": 1167.72,
        "duration": 5.439
    },
    {
        "text": "your whole username needs to be a or a A",
        "start": 1170.0,
        "duration": 6.679
    },
    {
        "text": "or a AA or A A AA it can vary with each",
        "start": 1173.159,
        "duration": 7.0
    },
    {
        "text": "symbol it just means zero or more of any",
        "start": 1176.679,
        "duration": 5.801
    },
    {
        "text": "character back to back so I could do",
        "start": 1180.159,
        "duration": 3.801
    },
    {
        "text": "this on both the left and the right",
        "start": 1182.48,
        "duration": 3.6
    },
    {
        "text": "which one is better you know it depends",
        "start": 1183.96,
        "duration": 3.92
    },
    {
        "text": "I think a an argument could be made that",
        "start": 1186.08,
        "duration": 3.76
    },
    {
        "text": "this is even more clear because it's",
        "start": 1187.88,
        "duration": 3.279
    },
    {
        "text": "obvious now that there's a DOT which",
        "start": 1189.84,
        "duration": 3.28
    },
    {
        "text": "means any character and then there's the",
        "start": 1191.159,
        "duration": 3.76
    },
    {
        "text": "dot star but if you're in the habit of",
        "start": 1193.12,
        "duration": 3.919
    },
    {
        "text": "doing this frequently one of the reasons",
        "start": 1194.919,
        "duration": 4.441
    },
    {
        "text": "things like the plus exist is just to",
        "start": 1197.039,
        "duration": 3.841
    },
    {
        "text": "consolidate your code into something a",
        "start": 1199.36,
        "duration": 3.0
    },
    {
        "text": "little more succinct and if you're",
        "start": 1200.88,
        "duration": 3.159
    },
    {
        "text": "familiar with seeing the plus now maybe",
        "start": 1202.36,
        "duration": 3.439
    },
    {
        "text": "this is more readable to you so again",
        "start": 1204.039,
        "duration": 3.52
    },
    {
        "text": "just like with python more generally",
        "start": 1205.799,
        "duration": 3.281
    },
    {
        "text": "you're going to often see different ways",
        "start": 1207.559,
        "duration": 3.041
    },
    {
        "text": "to express the same patterns and",
        "start": 1209.08,
        "duration": 2.959
    },
    {
        "text": "reasonable people might agree or",
        "start": 1210.6,
        "duration": 4.4
    },
    {
        "text": "disagree as to which way is better than",
        "start": 1212.039,
        "duration": 5.321
    },
    {
        "text": "another well let me propose to that we",
        "start": 1215.0,
        "duration": 4.44
    },
    {
        "text": "can think about both of these models a",
        "start": 1217.36,
        "duration": 3.64
    },
    {
        "text": "little more graphically if this looks a",
        "start": 1219.44,
        "duration": 2.92
    },
    {
        "text": "little cryptic to you let me go ahead",
        "start": 1221.0,
        "duration": 4.12
    },
    {
        "text": "and Rewind to the previous incarnation",
        "start": 1222.36,
        "duration": 4.36
    },
    {
        "text": "of this regular expression which was",
        "start": 1225.12,
        "duration": 4.32
    },
    {
        "text": "just a single dot star this regular",
        "start": 1226.72,
        "duration": 6.12
    },
    {
        "text": "expression doar at doar means what again",
        "start": 1229.44,
        "duration": 5.16
    },
    {
        "text": "it means zero or more characters",
        "start": 1232.84,
        "duration": 3.8
    },
    {
        "text": "followed by a literal at sign followed",
        "start": 1234.6,
        "duration": 4.12
    },
    {
        "text": "by zero or more other characters now",
        "start": 1236.64,
        "duration": 3.519
    },
    {
        "text": "when you pass this pattern in as an",
        "start": 1238.72,
        "duration": 3.76
    },
    {
        "text": "argument to re. search it's going to",
        "start": 1240.159,
        "duration": 4.681
    },
    {
        "text": "read it from left to right and then use",
        "start": 1242.48,
        "duration": 5.16
    },
    {
        "text": "it to try to match against the input",
        "start": 1244.84,
        "duration": 4.8
    },
    {
        "text": "email in this case that the user typed",
        "start": 1247.64,
        "duration": 5.08
    },
    {
        "text": "in now how is the computer how is re.",
        "start": 1249.64,
        "duration": 5.6
    },
    {
        "text": "search going to keep track of whether or",
        "start": 1252.72,
        "duration": 4.36
    },
    {
        "text": "not the user's email matches this",
        "start": 1255.24,
        "duration": 3.559
    },
    {
        "text": "pattern well it turns out that that it's",
        "start": 1257.08,
        "duration": 3.56
    },
    {
        "text": "going to be using a machine of sorts",
        "start": 1258.799,
        "duration": 3.321
    },
    {
        "text": "implemented in software known as a",
        "start": 1260.64,
        "duration": 3.8
    },
    {
        "text": "finite State machine or more formally a",
        "start": 1262.12,
        "duration": 4.799
    },
    {
        "text": "non-deterministic finite automaton and",
        "start": 1264.44,
        "duration": 3.96
    },
    {
        "text": "the way it works if we depict this",
        "start": 1266.919,
        "duration": 4.481
    },
    {
        "text": "graphically is as follows the re. search",
        "start": 1268.4,
        "duration": 5.72
    },
    {
        "text": "function starts over here in a so-called",
        "start": 1271.4,
        "duration": 4.399
    },
    {
        "text": "start State that's the sort of condition",
        "start": 1274.12,
        "duration": 3.6
    },
    {
        "text": "in which it begins and then it's going",
        "start": 1275.799,
        "duration": 3.961
    },
    {
        "text": "to read the user's email address from",
        "start": 1277.72,
        "duration": 4.0
    },
    {
        "text": "left to right and it's going to decide",
        "start": 1279.76,
        "duration": 3.76
    },
    {
        "text": "whether or not to stay in this first",
        "start": 1281.72,
        "duration": 4.52
    },
    {
        "text": "state or transition to the next state so",
        "start": 1283.52,
        "duration": 4.72
    },
    {
        "text": "for instance in this first state as the",
        "start": 1286.24,
        "duration": 4.4
    },
    {
        "text": "user is reading my email address maen",
        "start": 1288.24,
        "duration": 5.039
    },
    {
        "text": "harvard.edu it's going to follow this",
        "start": 1290.64,
        "duration": 5.24
    },
    {
        "text": "curved edge up and around to itself a",
        "start": 1293.279,
        "duration": 4.601
    },
    {
        "text": "reflexive Edge and it's labeled dot",
        "start": 1295.88,
        "duration": 3.399
    },
    {
        "text": "because dot again just means any",
        "start": 1297.88,
        "duration": 3.96
    },
    {
        "text": "character so as the function is reading",
        "start": 1299.279,
        "duration": 4.4
    },
    {
        "text": "my email address mail at harvard.edu",
        "start": 1301.84,
        "duration": 4.88
    },
    {
        "text": "from left to right it's going to follow",
        "start": 1303.679,
        "duration": 9.48
    },
    {
        "text": "these transitions as follows m a l a n",
        "start": 1306.72,
        "duration": 8.319
    },
    {
        "text": "and then it's hopefully going to follow",
        "start": 1313.159,
        "duration": 4.0
    },
    {
        "text": "this transition to the second state",
        "start": 1315.039,
        "duration": 4.081
    },
    {
        "text": "because there's a literal at sign both",
        "start": 1317.159,
        "duration": 3.88
    },
    {
        "text": "in this machine as well as in my email",
        "start": 1319.12,
        "duration": 3.32
    },
    {
        "text": "address then it's going to try to read",
        "start": 1321.039,
        "duration": 8.281
    },
    {
        "text": "the rest of my address h a r v a r d. e",
        "start": 1322.44,
        "duration": 9.68
    },
    {
        "text": "du and that's it and then the computer's",
        "start": 1329.32,
        "duration": 5.04
    },
    {
        "text": "going to check did it end up in a an",
        "start": 1332.12,
        "duration": 4.439
    },
    {
        "text": "except State a final State that's",
        "start": 1334.36,
        "duration": 3.76
    },
    {
        "text": "actually depicted here pictorially a",
        "start": 1336.559,
        "duration": 3.521
    },
    {
        "text": "little differently with double circles",
        "start": 1338.12,
        "duration": 3.48
    },
    {
        "text": "one inside of the other and that just",
        "start": 1340.08,
        "duration": 4.16
    },
    {
        "text": "means that if the computer finds itself",
        "start": 1341.6,
        "duration": 5.64
    },
    {
        "text": "in that second accept state after having",
        "start": 1344.24,
        "duration": 5.84
    },
    {
        "text": "read all of the users input it is indeed",
        "start": 1347.24,
        "duration": 5.679
    },
    {
        "text": "a valid email address if by some chance",
        "start": 1350.08,
        "duration": 4.56
    },
    {
        "text": "the machine somehow ended up stuck in",
        "start": 1352.919,
        "duration": 3.321
    },
    {
        "text": "that first state which does not have",
        "start": 1354.64,
        "duration": 3.039
    },
    {
        "text": "double circles and it is therefore not",
        "start": 1356.24,
        "duration": 3.12
    },
    {
        "text": "an accept state the computer would",
        "start": 1357.679,
        "duration": 3.88
    },
    {
        "text": "conclude this is an invalid email",
        "start": 1359.36,
        "duration": 5.12
    },
    {
        "text": "address instead by contrast if we go",
        "start": 1361.559,
        "duration": 4.48
    },
    {
        "text": "back to my other version of the code",
        "start": 1364.48,
        "duration": 4.319
    },
    {
        "text": "where I instead had Plus on both the",
        "start": 1366.039,
        "duration": 4.681
    },
    {
        "text": "left and the right recall that re.",
        "start": 1368.799,
        "duration": 3.321
    },
    {
        "text": "search is going to use one of these",
        "start": 1370.72,
        "duration": 3.559
    },
    {
        "text": "State machines in order to decide from",
        "start": 1372.12,
        "duration": 4.36
    },
    {
        "text": "left to right whether or not to accept",
        "start": 1374.279,
        "duration": 5.081
    },
    {
        "text": "the user's input like Ma at harbard edu",
        "start": 1376.48,
        "duration": 4.72
    },
    {
        "text": "can we get from the start state so to",
        "start": 1379.36,
        "duration": 4.439
    },
    {
        "text": "speak to an accept state to decide Yep",
        "start": 1381.2,
        "duration": 4.88
    },
    {
        "text": "this was in fact meeting the pattern",
        "start": 1383.799,
        "duration": 4.081
    },
    {
        "text": "well let's propose that this",
        "start": 1386.08,
        "duration": 4.079
    },
    {
        "text": "non-deterministic finite automaton look",
        "start": 1387.88,
        "duration": 4.159
    },
    {
        "text": "like this instead we're going to start",
        "start": 1390.159,
        "duration": 4.201
    },
    {
        "text": "as before in the leftmost start State",
        "start": 1392.039,
        "duration": 4.24
    },
    {
        "text": "and we're going to necessarily consume",
        "start": 1394.36,
        "duration": 3.96
    },
    {
        "text": "one character per this first Edge which",
        "start": 1396.279,
        "duration": 3.561
    },
    {
        "text": "is labeled with a DOT to indicate that",
        "start": 1398.32,
        "duration": 3.28
    },
    {
        "text": "we can consume any one character like",
        "start": 1399.84,
        "duration": 5.199
    },
    {
        "text": "the m in Ma at harvard.edu then we can",
        "start": 1401.6,
        "duration": 4.8
    },
    {
        "text": "spend some time consuming more",
        "start": 1405.039,
        "duration": 4.081
    },
    {
        "text": "characters before the at sign so the a a",
        "start": 1406.4,
        "duration": 6.92
    },
    {
        "text": "l a n then we can consume the at sign",
        "start": 1409.12,
        "duration": 5.96
    },
    {
        "text": "then we can consume at least one more",
        "start": 1413.32,
        "duration": 3.64
    },
    {
        "text": "character because recall that the Rex",
        "start": 1415.08,
        "duration": 4.92
    },
    {
        "text": "has dot plus this time and then we can",
        "start": 1416.96,
        "duration": 5.16
    },
    {
        "text": "consume even more characters if we want",
        "start": 1420.0,
        "duration": 4.32
    },
    {
        "text": "so if we first consume the H in",
        "start": 1422.12,
        "duration": 7.799
    },
    {
        "text": "harvard.edu that then leaves the a r v a",
        "start": 1424.32,
        "duration": 11.08
    },
    {
        "text": "d and then e du and now here too we're",
        "start": 1429.919,
        "duration": 7.24
    },
    {
        "text": "at the end of the story but we're in an",
        "start": 1435.4,
        "duration": 3.72
    },
    {
        "text": "accept state because that's circle at",
        "start": 1437.159,
        "duration": 4.321
    },
    {
        "text": "the end has two circles total which",
        "start": 1439.12,
        "duration": 4.12
    },
    {
        "text": "means that if the computer if this",
        "start": 1441.48,
        "duration": 4.199
    },
    {
        "text": "function finds itself in that accept",
        "start": 1443.24,
        "duration": 4.16
    },
    {
        "text": "state after reading the entirety of the",
        "start": 1445.679,
        "duration": 5.12
    },
    {
        "text": "user's input it is too in fact a valid",
        "start": 1447.4,
        "duration": 5.72
    },
    {
        "text": "email address if by contrast we had",
        "start": 1450.799,
        "duration": 4.081
    },
    {
        "text": "gotten stuck in one of those other",
        "start": 1453.12,
        "duration": 4.2
    },
    {
        "text": "states unable to follow a transition one",
        "start": 1454.88,
        "duration": 4.48
    },
    {
        "text": "of those edges and therefore unable to",
        "start": 1457.32,
        "duration": 4.32
    },
    {
        "text": "make progress in the user's input from",
        "start": 1459.36,
        "duration": 3.96
    },
    {
        "text": "left to right then we would have to",
        "start": 1461.64,
        "duration": 3.639
    },
    {
        "text": "conclude that that email address is in",
        "start": 1463.32,
        "duration": 4.479
    },
    {
        "text": "fact invalid well how can we go upon",
        "start": 1465.279,
        "duration": 4.481
    },
    {
        "text": "approving this code further let me",
        "start": 1467.799,
        "duration": 3.681
    },
    {
        "text": "propose now that we check not only for a",
        "start": 1469.76,
        "duration": 4.24
    },
    {
        "text": "username and also something after the",
        "start": 1471.48,
        "duration": 4.0
    },
    {
        "text": "username like a domain name but",
        "start": 1474.0,
        "duration": 3.64
    },
    {
        "text": "minimally required that the string ends",
        "start": 1475.48,
        "duration": 5.04
    },
    {
        "text": "with edu as well well I think I could do",
        "start": 1477.64,
        "duration": 5.08
    },
    {
        "text": "this fairly straightforward not only do",
        "start": 1480.52,
        "duration": 3.72
    },
    {
        "text": "I want there to be something after the",
        "start": 1482.72,
        "duration": 3.839
    },
    {
        "text": "at sign like the domain like Harvard I",
        "start": 1484.24,
        "duration": 4.72
    },
    {
        "text": "want the whole thing to end with",
        "start": 1486.559,
        "duration": 5.081
    },
    {
        "text": "edu but there's a little bit of danger",
        "start": 1488.96,
        "duration": 5.4
    },
    {
        "text": "here what have I done wrong by",
        "start": 1491.64,
        "duration": 5.08
    },
    {
        "text": "implementing my regular expression now",
        "start": 1494.36,
        "duration": 5.679
    },
    {
        "text": "in this way by using plus",
        "start": 1496.72,
        "duration": 8.12
    },
    {
        "text": "do.edu what could go wrong with this",
        "start": 1500.039,
        "duration": 7.921
    },
    {
        "text": "version uh the dot is dot means",
        "start": 1504.84,
        "duration": 5.16
    },
    {
        "text": "something else in this context where it",
        "start": 1507.96,
        "duration": 3.719
    },
    {
        "text": "means zero or more repetitions of a",
        "start": 1510.0,
        "duration": 3.36
    },
    {
        "text": "character which is why it will interpret",
        "start": 1511.679,
        "duration": 4.36
    },
    {
        "text": "it differently exactly even though I",
        "start": 1513.36,
        "duration": 5.48
    },
    {
        "text": "mean for it to mean literally edu a",
        "start": 1516.039,
        "duration": 5.24
    },
    {
        "text": "period and then edu unfortunately in the",
        "start": 1518.84,
        "duration": 4.36
    },
    {
        "text": "world of regular Expressions dot means",
        "start": 1521.279,
        "duration": 4.041
    },
    {
        "text": "any character which means that this",
        "start": 1523.2,
        "duration": 5.12
    },
    {
        "text": "string could technically end in a edu or",
        "start": 1525.32,
        "duration": 7.16
    },
    {
        "text": "or bedu or cedu and so forth but that's",
        "start": 1528.32,
        "duration": 7.12
    },
    {
        "text": "not in fact that I want so any instincts",
        "start": 1532.48,
        "duration": 5.04
    },
    {
        "text": "now as to how I could fix this problem",
        "start": 1535.44,
        "duration": 3.68
    },
    {
        "text": "and let me demonstrate the problem more",
        "start": 1537.52,
        "duration": 3.48
    },
    {
        "text": "clearly let me go ahead and run this",
        "start": 1539.12,
        "duration": 3.919
    },
    {
        "text": "code here let me go ahead and type in",
        "start": 1541.0,
        "duration": 5.159
    },
    {
        "text": "maen harvard.edu and as always this does",
        "start": 1543.039,
        "duration": 5.561
    },
    {
        "text": "in fact work but Watch What Happens here",
        "start": 1546.159,
        "duration": 5.481
    },
    {
        "text": "let me go ahead and do Ma at Harvard and",
        "start": 1548.6,
        "duration": 7.0
    },
    {
        "text": "then uh M at Harvard question mark edu",
        "start": 1551.64,
        "duration": 6.96
    },
    {
        "text": "enter that too is valid so I could put",
        "start": 1555.6,
        "duration": 4.64
    },
    {
        "text": "any character there and it's still going",
        "start": 1558.6,
        "duration": 3.48
    },
    {
        "text": "to be accepted but I don't want question",
        "start": 1560.24,
        "duration": 4.84
    },
    {
        "text": "mark edu I want edu literally any",
        "start": 1562.08,
        "duration": 5.479
    },
    {
        "text": "instincts then for how we can solve this",
        "start": 1565.08,
        "duration": 4.92
    },
    {
        "text": "problem here how can I get this new",
        "start": 1567.559,
        "duration": 4.761
    },
    {
        "text": "function re. search and a regular",
        "start": 1570.0,
        "duration": 3.919
    },
    {
        "text": "expression more generally to literally",
        "start": 1572.32,
        "duration": 4.28
    },
    {
        "text": "mean a dot might you think you can use",
        "start": 1573.919,
        "duration": 5.64
    },
    {
        "text": "the uh Escape character the backslash",
        "start": 1576.6,
        "duration": 4.84
    },
    {
        "text": "indeed the so-called Escape character",
        "start": 1579.559,
        "duration": 3.561
    },
    {
        "text": "which we've seen before outside of the",
        "start": 1581.44,
        "duration": 3.08
    },
    {
        "text": "context of regular Expressions when we",
        "start": 1583.12,
        "duration": 4.159
    },
    {
        "text": "talked about new lines back sln was a",
        "start": 1584.52,
        "duration": 4.6
    },
    {
        "text": "way of telling the computer I want a new",
        "start": 1587.279,
        "duration": 3.441
    },
    {
        "text": "line but without actually literally",
        "start": 1589.12,
        "duration": 3.159
    },
    {
        "text": "hitting enter and moving the cursor",
        "start": 1590.72,
        "duration": 3.559
    },
    {
        "text": "yourself and you don't want a literal n",
        "start": 1592.279,
        "duration": 4.361
    },
    {
        "text": "on the screen so back sln was a way to",
        "start": 1594.279,
        "duration": 4.241
    },
    {
        "text": "escape and and convey that you want a",
        "start": 1596.64,
        "duration": 3.68
    },
    {
        "text": "new line it turns out regular",
        "start": 1598.52,
        "duration": 3.44
    },
    {
        "text": "Expressions use a similar technique to",
        "start": 1600.32,
        "duration": 3.959
    },
    {
        "text": "solve this problem here in fact let me",
        "start": 1601.96,
        "duration": 4.4
    },
    {
        "text": "go into my regular expression and before",
        "start": 1604.279,
        "duration": 4.201
    },
    {
        "text": "that final dot let me put a single",
        "start": 1606.36,
        "duration": 4.039
    },
    {
        "text": "backslash in the world of regular",
        "start": 1608.48,
        "duration": 3.88
    },
    {
        "text": "Expressions this is a so-called special",
        "start": 1610.399,
        "duration": 4.081
    },
    {
        "text": "sequence and it indicates per this",
        "start": 1612.36,
        "duration": 3.96
    },
    {
        "text": "backslash and a single dot that I",
        "start": 1614.48,
        "duration": 4.04
    },
    {
        "text": "literally want to match on a DOT it's",
        "start": 1616.32,
        "duration": 3.88
    },
    {
        "text": "not that I want to match on any",
        "start": 1618.52,
        "duration": 4.0
    },
    {
        "text": "character and then edu I want to match",
        "start": 1620.2,
        "duration": 5.76
    },
    {
        "text": "on a DOT or a period edu but we don't",
        "start": 1622.52,
        "duration": 5.84
    },
    {
        "text": "want python to misinterpret this",
        "start": 1625.96,
        "duration": 4.8
    },
    {
        "text": "backslash is beginning a an escape",
        "start": 1628.36,
        "duration": 3.96
    },
    {
        "text": "sequence something special like backs",
        "start": 1630.76,
        "duration": 3.2
    },
    {
        "text": "slash n which even though we as the",
        "start": 1632.32,
        "duration": 3.2
    },
    {
        "text": "programmer might type two characters",
        "start": 1633.96,
        "duration": 3.92
    },
    {
        "text": "backslash in it really is interpreted by",
        "start": 1635.52,
        "duration": 4.72
    },
    {
        "text": "python as a single new line we don't",
        "start": 1637.88,
        "duration": 4.36
    },
    {
        "text": "want any kind of misinterpretation like",
        "start": 1640.24,
        "duration": 3.96
    },
    {
        "text": "that here so it turns out there's one",
        "start": 1642.24,
        "duration": 3.28
    },
    {
        "text": "other thing we should do for regular",
        "start": 1644.2,
        "duration": 3.359
    },
    {
        "text": "expressions like this that have a backs",
        "start": 1645.52,
        "duration": 4.68
    },
    {
        "text": "slash used in this way I want to specify",
        "start": 1647.559,
        "duration": 4.921
    },
    {
        "text": "to python that I want this string this",
        "start": 1650.2,
        "duration": 4.12
    },
    {
        "text": "regular expression in double quotes to",
        "start": 1652.48,
        "duration": 4.199
    },
    {
        "text": "be treated as a raw string literally",
        "start": 1654.32,
        "duration": 3.76
    },
    {
        "text": "putting an r at the beginning of the",
        "start": 1656.679,
        "duration": 3.0
    },
    {
        "text": "string to indicate to python that you",
        "start": 1658.08,
        "duration": 3.4
    },
    {
        "text": "should not try to interpret any",
        "start": 1659.679,
        "duration": 4.281
    },
    {
        "text": "backslashes in the usual way I want to",
        "start": 1661.48,
        "duration": 4.4
    },
    {
        "text": "literally pass the backslash and the dot",
        "start": 1663.96,
        "duration": 4.0
    },
    {
        "text": "and the edu into this particular",
        "start": 1665.88,
        "duration": 4.519
    },
    {
        "text": "function search in this case so it's",
        "start": 1667.96,
        "duration": 4.48
    },
    {
        "text": "similar in spirit to using that F at the",
        "start": 1670.399,
        "duration": 3.921
    },
    {
        "text": "beginning of a format string which of",
        "start": 1672.44,
        "duration": 3.68
    },
    {
        "text": "course tells python to format the string",
        "start": 1674.32,
        "duration": 3.88
    },
    {
        "text": "in a certain way plugging in variables",
        "start": 1676.12,
        "duration": 3.84
    },
    {
        "text": "that might be between curly braces but",
        "start": 1678.2,
        "duration": 4.599
    },
    {
        "text": "in this case r indicates a raw string",
        "start": 1679.96,
        "duration": 5.719
    },
    {
        "text": "that I want passed in exactly as is now",
        "start": 1682.799,
        "duration": 4.801
    },
    {
        "text": "it's only strictly necessary if you are",
        "start": 1685.679,
        "duration": 4.521
    },
    {
        "text": "in fact using backslashes to indicate",
        "start": 1687.6,
        "duration": 4.24
    },
    {
        "text": "that you want some special sequence like",
        "start": 1690.2,
        "duration": 3.599
    },
    {
        "text": "backslash dot but in general it's",
        "start": 1691.84,
        "duration": 3.839
    },
    {
        "text": "probably good habit to get into to just",
        "start": 1693.799,
        "duration": 4.081
    },
    {
        "text": "use raw strings for all of your regular",
        "start": 1695.679,
        "duration": 3.72
    },
    {
        "text": "Expressions so that if you eventually go",
        "start": 1697.88,
        "duration": 3.48
    },
    {
        "text": "back in make a change make an addition",
        "start": 1699.399,
        "duration": 3.52
    },
    {
        "text": "you don't accidentally introduce a",
        "start": 1701.36,
        "duration": 3.6
    },
    {
        "text": "backslash and then forget that that",
        "start": 1702.919,
        "duration": 3.6
    },
    {
        "text": "might have some special or",
        "start": 1704.96,
        "duration": 3.76
    },
    {
        "text": "misinterpreted meaning well let me go",
        "start": 1706.519,
        "duration": 3.481
    },
    {
        "text": "ahead and try this new regular",
        "start": 1708.72,
        "duration": 3.24
    },
    {
        "text": "expression I'll clear my terminal window",
        "start": 1710.0,
        "duration": 5.48
    },
    {
        "text": "run python of validate run python of",
        "start": 1711.96,
        "duration": 5.839
    },
    {
        "text": "validate dopy and then I'll type in my",
        "start": 1715.48,
        "duration": 4.72
    },
    {
        "text": "email address correctly maen harvard.edu",
        "start": 1717.799,
        "duration": 4.961
    },
    {
        "text": "and that's fortunately still valid Let",
        "start": 1720.2,
        "duration": 4.28
    },
    {
        "text": "Me Clear My screen and run it one more",
        "start": 1722.76,
        "duration": 4.2
    },
    {
        "text": "time python of validate dopy and this",
        "start": 1724.48,
        "duration": 5.559
    },
    {
        "text": "time let's mistype it as maen Harvard",
        "start": 1726.96,
        "duration": 5.4
    },
    {
        "text": "questionmark edu whereby there's",
        "start": 1730.039,
        "duration": 4.041
    },
    {
        "text": "obviously not a DOT there but there is",
        "start": 1732.36,
        "duration": 4.08
    },
    {
        "text": "some other Single Character that last",
        "start": 1734.08,
        "duration": 4.52
    },
    {
        "text": "time was misinterpreted as valid",
        "start": 1736.44,
        "duration": 4.359
    },
    {
        "text": "but this time now that I've improved my",
        "start": 1738.6,
        "duration": 4.799
    },
    {
        "text": "regular expression it's discovered as",
        "start": 1740.799,
        "duration": 6.521
    },
    {
        "text": "indeed invalid any questions now on this",
        "start": 1743.399,
        "duration": 6.721
    },
    {
        "text": "technique for matching something to the",
        "start": 1747.32,
        "duration": 4.56
    },
    {
        "text": "left of the at sign something to the",
        "start": 1750.12,
        "duration": 4.96
    },
    {
        "text": "right and now ending with edu explicitly",
        "start": 1751.88,
        "duration": 6.08
    },
    {
        "text": "um what happens when use",
        "start": 1755.08,
        "duration": 5.36
    },
    {
        "text": "that a good question and you kind of",
        "start": 1757.96,
        "duration": 3.959
    },
    {
        "text": "called me out here well when in doubt",
        "start": 1760.44,
        "duration": 4.52
    },
    {
        "text": "let's try let me go ahead and do python",
        "start": 1761.919,
        "duration": 5.12
    },
    {
        "text": "invalidate dopy",
        "start": 1764.96,
        "duration": 5.839
    },
    {
        "text": "mailin harvard.edu which also is",
        "start": 1767.039,
        "duration": 6.24
    },
    {
        "text": "incorrect unfortunately my code thinks",
        "start": 1770.799,
        "duration": 5.0
    },
    {
        "text": "it's valid so another problem to solve",
        "start": 1773.279,
        "duration": 4.601
    },
    {
        "text": "but a shortcoming for now other",
        "start": 1775.799,
        "duration": 4.561
    },
    {
        "text": "questions on these regular Expressions",
        "start": 1777.88,
        "duration": 6.679
    },
    {
        "text": "thus far can you use curly brackets M",
        "start": 1780.36,
        "duration": 6.919
    },
    {
        "text": "instead of backslash can you use curly",
        "start": 1784.559,
        "duration": 4.401
    },
    {
        "text": "brackets instead of backslash not in",
        "start": 1787.279,
        "duration": 3.361
    },
    {
        "text": "this case if you want a literal dot",
        "start": 1788.96,
        "duration": 3.959
    },
    {
        "text": "backslash dot is the way to do it",
        "start": 1790.64,
        "duration": 4.12
    },
    {
        "text": "literally how about one other question",
        "start": 1792.919,
        "duration": 4.76
    },
    {
        "text": "on regular Expressions is this the same",
        "start": 1794.76,
        "duration": 5.519
    },
    {
        "text": "thing that that Google forms uses in",
        "start": 1797.679,
        "duration": 5.561
    },
    {
        "text": "order to categorize data in let's say",
        "start": 1800.279,
        "duration": 5.721
    },
    {
        "text": "some if you've got multiple people",
        "start": 1803.24,
        "duration": 6.08
    },
    {
        "text": "sending in requests about some feedback",
        "start": 1806.0,
        "duration": 5.76
    },
    {
        "text": "do they categorize the data that they",
        "start": 1809.32,
        "duration": 4.52
    },
    {
        "text": "get using this particular regular",
        "start": 1811.76,
        "duration": 3.6
    },
    {
        "text": "expression thing indeed if you've ever",
        "start": 1813.84,
        "duration": 3.719
    },
    {
        "text": "used Google forms to not just submit it",
        "start": 1815.36,
        "duration": 4.72
    },
    {
        "text": "but to create a Google form one of the",
        "start": 1817.559,
        "duration": 4.921
    },
    {
        "text": "menu options is for response validation",
        "start": 1820.08,
        "duration": 4.24
    },
    {
        "text": "in English at least and what that allows",
        "start": 1822.48,
        "duration": 3.52
    },
    {
        "text": "you to do is specify that the user has",
        "start": 1824.32,
        "duration": 5.68
    },
    {
        "text": "to input an email address or URL uh or a",
        "start": 1826.0,
        "duration": 5.88
    },
    {
        "text": "string of some length but there's an",
        "start": 1830.0,
        "duration": 3.6
    },
    {
        "text": "even more powerful feature that some of",
        "start": 1831.88,
        "duration": 3.519
    },
    {
        "text": "you may not have ever noticed and indeed",
        "start": 1833.6,
        "duration": 3.64
    },
    {
        "text": "if you'd like to open up Google forms",
        "start": 1835.399,
        "duration": 3.961
    },
    {
        "text": "create a new form temporarily and poke",
        "start": 1837.24,
        "duration": 4.319
    },
    {
        "text": "around you will actually see in English",
        "start": 1839.36,
        "duration": 4.199
    },
    {
        "text": "at least quote unquote regular",
        "start": 1841.559,
        "duration": 3.681
    },
    {
        "text": "expression mentioned as one of the",
        "start": 1843.559,
        "duration": 3.641
    },
    {
        "text": "mechanisms you can use to validate your",
        "start": 1845.24,
        "duration": 4.36
    },
    {
        "text": "users's input into your Google form so",
        "start": 1847.2,
        "duration": 4.52
    },
    {
        "text": "in fact after today you can start",
        "start": 1849.6,
        "duration": 4.079
    },
    {
        "text": "avoiding these specific dropdowns of",
        "start": 1851.72,
        "duration": 3.76
    },
    {
        "text": "like email address or URL or the like",
        "start": 1853.679,
        "duration": 4.36
    },
    {
        "text": "and you can express your own patterns",
        "start": 1855.48,
        "duration": 4.919
    },
    {
        "text": "precisely as well regular Expressions",
        "start": 1858.039,
        "duration": 4.961
    },
    {
        "text": "can even be used in VSS code itself if",
        "start": 1860.399,
        "duration": 5.041
    },
    {
        "text": "you go and find or do a find and replace",
        "start": 1863.0,
        "duration": 4.48
    },
    {
        "text": "in vs code you can of course just type",
        "start": 1865.44,
        "duration": 4.199
    },
    {
        "text": "in words like you could into Microsoft",
        "start": 1867.48,
        "duration": 4.84
    },
    {
        "text": "Word or Google Docs you can also type if",
        "start": 1869.639,
        "duration": 4.561
    },
    {
        "text": "you check the right box regular",
        "start": 1872.32,
        "duration": 3.92
    },
    {
        "text": "expressions and start searching for",
        "start": 1874.2,
        "duration": 5.479
    },
    {
        "text": "patterns not literally specific values",
        "start": 1876.24,
        "duration": 6.039
    },
    {
        "text": "well let me propose that we now enhance",
        "start": 1879.679,
        "duration": 4.681
    },
    {
        "text": "this implementation further by",
        "start": 1882.279,
        "duration": 4.081
    },
    {
        "text": "introducing a few other symbols because",
        "start": 1884.36,
        "duration": 4.52
    },
    {
        "text": "right now with my code I keep saying",
        "start": 1886.36,
        "duration": 4.439
    },
    {
        "text": "that I want my email address to end with",
        "start": 1888.88,
        "duration": 5.24
    },
    {
        "text": "doedu and start with a username but I'm",
        "start": 1890.799,
        "duration": 5.561
    },
    {
        "text": "being a little too generous this does in",
        "start": 1894.12,
        "duration": 4.12
    },
    {
        "text": "fact work as expected for my own email",
        "start": 1896.36,
        "duration": 5.48
    },
    {
        "text": "address maen harvard.edu but what if I",
        "start": 1898.24,
        "duration": 7.2
    },
    {
        "text": "type in a sentence like my email address",
        "start": 1901.84,
        "duration": 6.679
    },
    {
        "text": "is maen harvard.edu and suppose I've",
        "start": 1905.44,
        "duration": 4.92
    },
    {
        "text": "typed that into the program or I've",
        "start": 1908.519,
        "duration": 4.28
    },
    {
        "text": "typed that into a Google form is this",
        "start": 1910.36,
        "duration": 7.6
    },
    {
        "text": "going to be considered valid or invalid",
        "start": 1912.799,
        "duration": 7.921
    },
    {
        "text": "well let's consider it's got the at sign",
        "start": 1917.96,
        "duration": 5.28
    },
    {
        "text": "so we're good there it's got one or more",
        "start": 1920.72,
        "duration": 4.919
    },
    {
        "text": "characters to the left of the at sign",
        "start": 1923.24,
        "duration": 4.48
    },
    {
        "text": "it's got one or more characters to the",
        "start": 1925.639,
        "duration": 5.081
    },
    {
        "text": "right of the at sign it's got a literal",
        "start": 1927.72,
        "duration": 5.839
    },
    {
        "text": "doedu somewhere in there to the right of",
        "start": 1930.72,
        "duration": 4.679
    },
    {
        "text": "the at sign and granted there's more",
        "start": 1933.559,
        "duration": 3.641
    },
    {
        "text": "stuff to the right there's literally",
        "start": 1935.399,
        "duration": 3.561
    },
    {
        "text": "this period at the end of my English",
        "start": 1937.2,
        "duration": 4.0
    },
    {
        "text": "sentence but that's okay because at the",
        "start": 1938.96,
        "duration": 4.16
    },
    {
        "text": "moment my regular expression is not so",
        "start": 1941.2,
        "duration": 4.68
    },
    {
        "text": "precise as to say the pattern must start",
        "start": 1943.12,
        "duration": 6.2
    },
    {
        "text": "with the username and end with the edu",
        "start": 1945.88,
        "duration": 5.759
    },
    {
        "text": "technically it's left unsaid what more",
        "start": 1949.32,
        "duration": 4.0
    },
    {
        "text": "can be to the left and what more can be",
        "start": 1951.639,
        "duration": 4.241
    },
    {
        "text": "to the right so when I hit enter now",
        "start": 1953.32,
        "duration": 4.199
    },
    {
        "text": "you'll see that that whole sentence in",
        "start": 1955.88,
        "duration": 3.72
    },
    {
        "text": "English is valid and that's obviously",
        "start": 1957.519,
        "duration": 3.721
    },
    {
        "text": "not what you want in fact consider the",
        "start": 1959.6,
        "duration": 4.439
    },
    {
        "text": "case of using Google forms or Office 365",
        "start": 1961.24,
        "duration": 5.12
    },
    {
        "text": "to collect data from users if you don't",
        "start": 1964.039,
        "duration": 4.52
    },
    {
        "text": "validate your input your users might",
        "start": 1966.36,
        "duration": 4.0
    },
    {
        "text": "very well type in a full sentence or",
        "start": 1968.559,
        "duration": 3.84
    },
    {
        "text": "some else with a typographical error not",
        "start": 1970.36,
        "duration": 3.88
    },
    {
        "text": "an actual email so if you're just trying",
        "start": 1972.399,
        "duration": 3.921
    },
    {
        "text": "to copy all of the results that have",
        "start": 1974.24,
        "duration": 3.36
    },
    {
        "text": "been typed into your form so you can",
        "start": 1976.32,
        "duration": 3.28
    },
    {
        "text": "paste them into Gmail or some email",
        "start": 1977.6,
        "duration": 3.64
    },
    {
        "text": "program it's going to break because",
        "start": 1979.6,
        "duration": 2.84
    },
    {
        "text": "you're going to accidentally paste",
        "start": 1981.24,
        "duration": 2.799
    },
    {
        "text": "something like a whole English sentence",
        "start": 1982.44,
        "duration": 3.599
    },
    {
        "text": "into the program instead of just an",
        "start": 1984.039,
        "duration": 4.041
    },
    {
        "text": "email address which is what your mailer",
        "start": 1986.039,
        "duration": 4.201
    },
    {
        "text": "expects so how can I be more precise",
        "start": 1988.08,
        "duration": 3.719
    },
    {
        "text": "well let me propose we introduce a few",
        "start": 1990.24,
        "duration": 4.319
    },
    {
        "text": "more symbols as well it turns out in the",
        "start": 1991.799,
        "duration": 4.88
    },
    {
        "text": "context of a regular expression one of",
        "start": 1994.559,
        "duration": 4.321
    },
    {
        "text": "these patterns you can use the carrot",
        "start": 1996.679,
        "duration": 4.72
    },
    {
        "text": "symbol the little triangular Mark to",
        "start": 1998.88,
        "duration": 4.72
    },
    {
        "text": "represent that you want this pattern to",
        "start": 2001.399,
        "duration": 4.361
    },
    {
        "text": "match the start of the string",
        "start": 2003.6,
        "duration": 4.36
    },
    {
        "text": "specifically not anywhere but the start",
        "start": 2005.76,
        "duration": 4.759
    },
    {
        "text": "of the user string by contrast you can",
        "start": 2007.96,
        "duration": 4.599
    },
    {
        "text": "use a dollar sign in your regular",
        "start": 2010.519,
        "duration": 4.081
    },
    {
        "text": "expression to say that you want to match",
        "start": 2012.559,
        "duration": 3.96
    },
    {
        "text": "the end of the string or technically",
        "start": 2014.6,
        "duration": 3.559
    },
    {
        "text": "just before the new line at the end of",
        "start": 2016.519,
        "duration": 3.081
    },
    {
        "text": "the string but for all intents and",
        "start": 2018.159,
        "duration": 3.201
    },
    {
        "text": "purposes think of carrot as meaning",
        "start": 2019.6,
        "duration": 3.88
    },
    {
        "text": "start of the string and dollar sign as",
        "start": 2021.36,
        "duration": 5.159
    },
    {
        "text": "meaning end of the string it is a weird",
        "start": 2023.48,
        "duration": 5.199
    },
    {
        "text": "thing that one is a carrot and one is a",
        "start": 2026.519,
        "duration": 3.721
    },
    {
        "text": "dollar sign these are not really things",
        "start": 2028.679,
        "duration": 3.281
    },
    {
        "text": "that I think of as opposites like a",
        "start": 2030.24,
        "duration": 3.52
    },
    {
        "text": "parenthesis or something like that but",
        "start": 2031.96,
        "duration": 3.28
    },
    {
        "text": "those are the symbols the world chose",
        "start": 2033.76,
        "duration": 4.279
    },
    {
        "text": "many years ago so let me go back to vs C",
        "start": 2035.24,
        "duration": 5.24
    },
    {
        "text": "now and let me add this feature to my",
        "start": 2038.039,
        "duration": 5.201
    },
    {
        "text": "code here let me specify that yes I do",
        "start": 2040.48,
        "duration": 4.679
    },
    {
        "text": "want to search for this pattern but I",
        "start": 2043.24,
        "duration": 4.559
    },
    {
        "text": "want the users's input to start with",
        "start": 2045.159,
        "duration": 4.641
    },
    {
        "text": "this pattern and end with this pattern",
        "start": 2047.799,
        "duration": 3.08
    },
    {
        "text": "so even though it's going to start",
        "start": 2049.8,
        "duration": 3.48
    },
    {
        "text": "looking even more cryptic I put a carrot",
        "start": 2050.879,
        "duration": 4.561
    },
    {
        "text": "symbol here at the beginning and I put a",
        "start": 2053.28,
        "duration": 4.399
    },
    {
        "text": "dollar sign here at the end that does",
        "start": 2055.44,
        "duration": 4.0
    },
    {
        "text": "not mean I want the user to type a",
        "start": 2057.679,
        "duration": 3.881
    },
    {
        "text": "carrot symbol or a dollar sign this is",
        "start": 2059.44,
        "duration": 5.12
    },
    {
        "text": "special symbology that indicates to re.",
        "start": 2061.56,
        "duration": 5.079
    },
    {
        "text": "search that it should only look for now",
        "start": 2064.56,
        "duration": 5.0
    },
    {
        "text": "an exact math against this pattern so if",
        "start": 2066.639,
        "duration": 5.24
    },
    {
        "text": "I now go back to my terminal window and",
        "start": 2069.56,
        "duration": 3.799
    },
    {
        "text": "I'll leave the previous result on the",
        "start": 2071.879,
        "duration": 3.641
    },
    {
        "text": "screen let me type the exact same thing",
        "start": 2073.359,
        "duration": 5.201
    },
    {
        "text": "my email address is maen harvard.edu",
        "start": 2075.52,
        "duration": 6.2
    },
    {
        "text": "enter sorry period and now I'm going to",
        "start": 2078.56,
        "duration": 5.799
    },
    {
        "text": "go ahead and hit enter now that's",
        "start": 2081.72,
        "duration": 4.959
    },
    {
        "text": "considered invalid but let me clear the",
        "start": 2084.359,
        "duration": 3.681
    },
    {
        "text": "screen and just to make sure I didn't",
        "start": 2086.679,
        "duration": 3.2
    },
    {
        "text": "break things let me type in just my",
        "start": 2088.04,
        "duration": 5.639
    },
    {
        "text": "email address and that too is valid any",
        "start": 2089.879,
        "duration": 6.121
    },
    {
        "text": "questions now on this version of my",
        "start": 2093.679,
        "duration": 4.841
    },
    {
        "text": "regular expression which note goes",
        "start": 2096.0,
        "duration": 5.68
    },
    {
        "text": "further to specify even more precisely",
        "start": 2098.52,
        "duration": 5.64
    },
    {
        "text": "that I want it to match at the start and",
        "start": 2101.68,
        "duration": 3.36
    },
    {
        "text": "the",
        "start": 2104.16,
        "duration": 4.919
    },
    {
        "text": "end any questions on this one here okay",
        "start": 2105.04,
        "duration": 7.2
    },
    {
        "text": "you have slash and that edu and then the",
        "start": 2109.079,
        "duration": 6.721
    },
    {
        "text": "dollar sign but the dot is like uh one",
        "start": 2112.24,
        "duration": 6.32
    },
    {
        "text": "of the regular expression right it",
        "start": 2115.8,
        "duration": 5.4
    },
    {
        "text": "normally is but this backslash that I",
        "start": 2118.56,
        "duration": 6.039
    },
    {
        "text": "deliberately put before this period here",
        "start": 2121.2,
        "duration": 6.0
    },
    {
        "text": "is an escape character it is a way of",
        "start": 2124.599,
        "duration": 5.361
    },
    {
        "text": "telling re. search that I don't want any",
        "start": 2127.2,
        "duration": 4.919
    },
    {
        "text": "character there I literally want a",
        "start": 2129.96,
        "duration": 4.52
    },
    {
        "text": "period there and it's the only way you",
        "start": 2132.119,
        "duration": 4.48
    },
    {
        "text": "can distinguish one from the other if I",
        "start": 2134.48,
        "duration": 4.68
    },
    {
        "text": "got rid of that slash this would mean",
        "start": 2136.599,
        "duration": 4.441
    },
    {
        "text": "that the email address just has to end",
        "start": 2139.16,
        "duration": 4.4
    },
    {
        "text": "with any character then an e then a d",
        "start": 2141.04,
        "duration": 4.52
    },
    {
        "text": "then a u i don't want that I want",
        "start": 2143.56,
        "duration": 5.0
    },
    {
        "text": "literally a period Then the E then the D",
        "start": 2145.56,
        "duration": 5.36
    },
    {
        "text": "then the U this is actually common",
        "start": 2148.56,
        "duration": 4.64
    },
    {
        "text": "convention in programming and technology",
        "start": 2150.92,
        "duration": 3.919
    },
    {
        "text": "in general if you and I decide on a",
        "start": 2153.2,
        "duration": 3.48
    },
    {
        "text": "convention whereby we're using some",
        "start": 2154.839,
        "duration": 3.28
    },
    {
        "text": "character on the keyboard to mean",
        "start": 2156.68,
        "duration": 3.919
    },
    {
        "text": "something special invariably we create a",
        "start": 2158.119,
        "duration": 4.401
    },
    {
        "text": "future problem for oursel when we want",
        "start": 2160.599,
        "duration": 4.441
    },
    {
        "text": "to literally use that same character and",
        "start": 2162.52,
        "duration": 4.319
    },
    {
        "text": "so the solution in general to that",
        "start": 2165.04,
        "duration": 3.799
    },
    {
        "text": "problem is to somehow escape the",
        "start": 2166.839,
        "duration": 3.361
    },
    {
        "text": "character so that it's clear to the",
        "start": 2168.839,
        "duration": 3.121
    },
    {
        "text": "computer that it's not that special",
        "start": 2170.2,
        "duration": 4.32
    },
    {
        "text": "symbol it's literally the symbol it sees",
        "start": 2171.96,
        "duration": 4.56
    },
    {
        "text": "so we don't need another we don't need",
        "start": 2174.52,
        "duration": 5.64
    },
    {
        "text": "another another slash before the dollar",
        "start": 2176.52,
        "duration": 7.36
    },
    {
        "text": "sign no uh because in this case dollar",
        "start": 2180.16,
        "duration": 5.88
    },
    {
        "text": "sign means something special per this",
        "start": 2183.88,
        "duration": 4.4
    },
    {
        "text": "chart here dollar sign by itself does",
        "start": 2186.04,
        "duration": 4.76
    },
    {
        "text": "not mean US dollars or currency it",
        "start": 2188.28,
        "duration": 4.28
    },
    {
        "text": "literally means match the end of the",
        "start": 2190.8,
        "duration": 4.96
    },
    {
        "text": "string if however I wanted the user to",
        "start": 2192.56,
        "duration": 5.68
    },
    {
        "text": "literally type in a dollar sign at the",
        "start": 2195.76,
        "duration": 4.52
    },
    {
        "text": "end of their input the solution would be",
        "start": 2198.24,
        "duration": 4.359
    },
    {
        "text": "the same I would put a backslash before",
        "start": 2200.28,
        "duration": 4.4
    },
    {
        "text": "the dollar sign which means my email",
        "start": 2202.599,
        "duration": 3.48
    },
    {
        "text": "address would have to be something like",
        "start": 2204.68,
        "duration": 4.56
    },
    {
        "text": "maen harvard.edu dollar sign which is",
        "start": 2206.079,
        "duration": 5.961
    },
    {
        "text": "obviously not correct too so backslashes",
        "start": 2209.24,
        "duration": 5.48
    },
    {
        "text": "just allow you to tell the computer to",
        "start": 2212.04,
        "duration": 4.88
    },
    {
        "text": "not treat those symbols specially like",
        "start": 2214.72,
        "duration": 4.359
    },
    {
        "text": "meaning something special but to treat",
        "start": 2216.92,
        "duration": 4.56
    },
    {
        "text": "them literally instead how about one",
        "start": 2219.079,
        "duration": 4.481
    },
    {
        "text": "other question here on regular",
        "start": 2221.48,
        "duration": 4.4
    },
    {
        "text": "Expressions you said you said one",
        "start": 2223.56,
        "duration": 5.519
    },
    {
        "text": "represents to to make it one plus then",
        "start": 2225.88,
        "duration": 5.04
    },
    {
        "text": "you say one was to make it one with",
        "start": 2229.079,
        "duration": 5.321
    },
    {
        "text": "nothing sure let me rewind in time I",
        "start": 2230.92,
        "duration": 4.72
    },
    {
        "text": "think what you're referring to was one",
        "start": 2234.4,
        "duration": 3.04
    },
    {
        "text": "of our earlier versions that initially",
        "start": 2235.64,
        "duration": 4.24
    },
    {
        "text": "looked like this which just meant Zero",
        "start": 2237.44,
        "duration": 5.24
    },
    {
        "text": "or more characters than an at sign than",
        "start": 2239.88,
        "duration": 5.479
    },
    {
        "text": "zero or more other characters we then",
        "start": 2242.68,
        "duration": 5.88
    },
    {
        "text": "evolved that to be this do Plus on both",
        "start": 2245.359,
        "duration": 4.96
    },
    {
        "text": "sides which means one or more characters",
        "start": 2248.56,
        "duration": 4.12
    },
    {
        "text": "on the left then an at sign then one or",
        "start": 2250.319,
        "duration": 4.52
    },
    {
        "text": "more characters on the right and if I'm",
        "start": 2252.68,
        "duration": 4.08
    },
    {
        "text": "interpreting your question correctly one",
        "start": 2254.839,
        "duration": 3.641
    },
    {
        "text": "of the points I made earlier was that if",
        "start": 2256.76,
        "duration": 3.88
    },
    {
        "text": "you didn't use Plus or forgot that it",
        "start": 2258.48,
        "duration": 4.359
    },
    {
        "text": "exists you could equivalently achieve",
        "start": 2260.64,
        "duration": 4.32
    },
    {
        "text": "the exact same result with two dots and",
        "start": 2262.839,
        "duration": 5.041
    },
    {
        "text": "a star because the first dot means any",
        "start": 2264.96,
        "duration": 5.04
    },
    {
        "text": "character it's got to be there the",
        "start": 2267.88,
        "duration": 5.4
    },
    {
        "text": "second dot star means zero or more other",
        "start": 2270.0,
        "duration": 5.48
    },
    {
        "text": "characters and same on the right so it's",
        "start": 2273.28,
        "duration": 4.28
    },
    {
        "text": "just another way of expressing the same",
        "start": 2275.48,
        "duration": 4.879
    },
    {
        "text": "idea one or more can be represented like",
        "start": 2277.56,
        "duration": 5.559
    },
    {
        "text": "this with DOT do star or you can just",
        "start": 2280.359,
        "duration": 5.361
    },
    {
        "text": "use the handier syntax of plus which",
        "start": 2283.119,
        "duration": 4.601
    },
    {
        "text": "means the same thing all right so I dare",
        "start": 2285.72,
        "duration": 3.599
    },
    {
        "text": "say there's still some problems with the",
        "start": 2287.72,
        "duration": 3.48
    },
    {
        "text": "regular expression in this current form",
        "start": 2289.319,
        "duration": 3.52
    },
    {
        "text": "because even though now we're starting",
        "start": 2291.2,
        "duration": 2.919
    },
    {
        "text": "to look for the username at the",
        "start": 2292.839,
        "duration": 3.321
    },
    {
        "text": "beginning of the string from the user",
        "start": 2294.119,
        "duration": 4.161
    },
    {
        "text": "and we're looking for the edu literally",
        "start": 2296.16,
        "duration": 4.4
    },
    {
        "text": "at the end of the string from the user",
        "start": 2298.28,
        "duration": 4.96
    },
    {
        "text": "those dots are a little too encompassing",
        "start": 2300.56,
        "duration": 4.6
    },
    {
        "text": "right now I am allowed to type in more",
        "start": 2303.24,
        "duration": 4.839
    },
    {
        "text": "than the single at sign why because at",
        "start": 2305.16,
        "duration": 4.959
    },
    {
        "text": "is a character and Dot means any",
        "start": 2308.079,
        "duration": 3.881
    },
    {
        "text": "character so honestly I can have as many",
        "start": 2310.119,
        "duration": 3.841
    },
    {
        "text": "at signs is this thing at the moment as",
        "start": 2311.96,
        "duration": 4.28
    },
    {
        "text": "I want for instance if I run python of",
        "start": 2313.96,
        "duration": 5.119
    },
    {
        "text": "validate dopy maen harvard.edu still",
        "start": 2316.24,
        "duration": 5.56
    },
    {
        "text": "works as expected but if I also run",
        "start": 2319.079,
        "duration": 4.881
    },
    {
        "text": "python of validate dopy and incorrectly",
        "start": 2321.8,
        "duration": 5.68
    },
    {
        "text": "do mail harvard.edu that should be",
        "start": 2323.96,
        "duration": 6.28
    },
    {
        "text": "invalid but it's considered valid",
        "start": 2327.48,
        "duration": 4.56
    },
    {
        "text": "instead so I think we need to be a",
        "start": 2330.24,
        "duration": 4.76
    },
    {
        "text": "little more restrictive when it comes to",
        "start": 2332.04,
        "duration": 5.039
    },
    {
        "text": "that dot and we can't just say oh any",
        "start": 2335.0,
        "duration": 4.68
    },
    {
        "text": "old character there is fine we need to",
        "start": 2337.079,
        "duration": 5.321
    },
    {
        "text": "be more specific well it turns out that",
        "start": 2339.68,
        "duration": 4.84
    },
    {
        "text": "regular Expressions also support this",
        "start": 2342.4,
        "duration": 5.08
    },
    {
        "text": "syntax you can use square brackets",
        "start": 2344.52,
        "duration": 5.44
    },
    {
        "text": "inside of your pattern and inside of",
        "start": 2347.48,
        "duration": 5.56
    },
    {
        "text": "those square brackets include one or",
        "start": 2349.96,
        "duration": 5.119
    },
    {
        "text": "more characters that you want to look",
        "start": 2353.04,
        "duration": 3.079
    },
    {
        "text": "for",
        "start": 2355.079,
        "duration": 3.721
    },
    {
        "text": "specifically alternatively you can",
        "start": 2356.119,
        "duration": 4.881
    },
    {
        "text": "inside of those square brackets put a",
        "start": 2358.8,
        "duration": 4.24
    },
    {
        "text": "carrot symbol which unfortunately in",
        "start": 2361.0,
        "duration": 3.76
    },
    {
        "text": "this context means something completely",
        "start": 2363.04,
        "duration": 3.44
    },
    {
        "text": "different from match the start of the",
        "start": 2364.76,
        "duration": 3.96
    },
    {
        "text": "string but would be the complement",
        "start": 2366.48,
        "duration": 4.24
    },
    {
        "text": "operator inside of these square brackets",
        "start": 2368.72,
        "duration": 4.32
    },
    {
        "text": "which means you cannot match any of",
        "start": 2370.72,
        "duration": 4.639
    },
    {
        "text": "these characters so things are about to",
        "start": 2373.04,
        "duration": 4.279
    },
    {
        "text": "look even more cryptic now but that's",
        "start": 2375.359,
        "duration": 3.76
    },
    {
        "text": "why we're focusing on regular",
        "start": 2377.319,
        "duration": 4.321
    },
    {
        "text": "Expressions on their own here if I don't",
        "start": 2379.119,
        "duration": 5.2
    },
    {
        "text": "want to allow any character which is",
        "start": 2381.64,
        "duration": 5.439
    },
    {
        "text": "what a DOT is let me go ahead and I",
        "start": 2384.319,
        "duration": 5.0
    },
    {
        "text": "could just say well I only want to",
        "start": 2387.079,
        "duration": 6.161
    },
    {
        "text": "support a or B's or C's or D's or E's or",
        "start": 2389.319,
        "duration": 5.721
    },
    {
        "text": "FS or G's I could type in the whole",
        "start": 2393.24,
        "duration": 3.76
    },
    {
        "text": "alphabet here plus some numbers to",
        "start": 2395.04,
        "duration": 3.799
    },
    {
        "text": "actually include all of the letters that",
        "start": 2397.0,
        "duration": 4.2
    },
    {
        "text": "I do want to allow but honestly a little",
        "start": 2398.839,
        "duration": 5.0
    },
    {
        "text": "simpler would be this I could use a",
        "start": 2401.2,
        "duration": 6.159
    },
    {
        "text": "carrot symbol and then in at sign which",
        "start": 2403.839,
        "duration": 6.081
    },
    {
        "text": "has the effect of saying this is the set",
        "start": 2407.359,
        "duration": 5.76
    },
    {
        "text": "of characters that has everything except",
        "start": 2409.92,
        "duration": 5.56
    },
    {
        "text": "an at sign and I can do the same thing",
        "start": 2413.119,
        "duration": 4.801
    },
    {
        "text": "over here instead of a DOT to the right",
        "start": 2415.48,
        "duration": 5.0
    },
    {
        "text": "of the at sign I can do Open",
        "start": 2417.92,
        "duration": 6.24
    },
    {
        "text": "Bracket carrot at sign and I admit",
        "start": 2420.48,
        "duration": 5.599
    },
    {
        "text": "things are starting to escalate quickly",
        "start": 2424.16,
        "duration": 3.72
    },
    {
        "text": "here but let's start from the left and",
        "start": 2426.079,
        "duration": 4.841
    },
    {
        "text": "go to the right this carrot outside of",
        "start": 2427.88,
        "duration": 4.56
    },
    {
        "text": "the square brackets at the very start of",
        "start": 2430.92,
        "duration": 3.84
    },
    {
        "text": "my string as before means match from the",
        "start": 2432.44,
        "duration": 4.44
    },
    {
        "text": "start of the string and let's Jump Ahead",
        "start": 2434.76,
        "duration": 3.88
    },
    {
        "text": "the dollar sign all the way at the end",
        "start": 2436.88,
        "duration": 3.84
    },
    {
        "text": "of the regular expression means match at",
        "start": 2438.64,
        "duration": 4.04
    },
    {
        "text": "the end of the string so if we can",
        "start": 2440.72,
        "duration": 3.359
    },
    {
        "text": "mentally tick those off as",
        "start": 2442.68,
        "duration": 3.36
    },
    {
        "text": "straightforward let's now focus on",
        "start": 2444.079,
        "duration": 4.321
    },
    {
        "text": "everything else in the middle well to",
        "start": 2446.04,
        "duration": 4.64
    },
    {
        "text": "the left here we have new syntax a",
        "start": 2448.4,
        "duration": 6.04
    },
    {
        "text": "square bracket another carrot an at sign",
        "start": 2450.68,
        "duration": 6.24
    },
    {
        "text": "and a closed square bracket and then a",
        "start": 2454.44,
        "duration": 4.879
    },
    {
        "text": "plus the plus means the same thing as",
        "start": 2456.92,
        "duration": 4.8
    },
    {
        "text": "always it means one or more of the",
        "start": 2459.319,
        "duration": 4.881
    },
    {
        "text": "things to the left what is the thing to",
        "start": 2461.72,
        "duration": 5.119
    },
    {
        "text": "the left well this is the new syntax",
        "start": 2464.2,
        "duration": 4.6
    },
    {
        "text": "inside of square brackets here I have a",
        "start": 2466.839,
        "duration": 4.52
    },
    {
        "text": "carrot symbol and then an at sign that",
        "start": 2468.8,
        "duration": 5.559
    },
    {
        "text": "just means any character accept an at",
        "start": 2471.359,
        "duration": 5.401
    },
    {
        "text": "sign it's a weird syntax but this is how",
        "start": 2474.359,
        "duration": 5.121
    },
    {
        "text": "we can express that simple idea any",
        "start": 2476.76,
        "duration": 5.72
    },
    {
        "text": "character on the keyboard except for an",
        "start": 2479.48,
        "duration": 4.92
    },
    {
        "text": "at sign and heck even other characters",
        "start": 2482.48,
        "duration": 3.4
    },
    {
        "text": "that aren't physically on your keyboard",
        "start": 2484.4,
        "duration": 3.84
    },
    {
        "text": "but that nonetheless exist",
        "start": 2485.88,
        "duration": 4.52
    },
    {
        "text": "then we have a literal at sign then we",
        "start": 2488.24,
        "duration": 3.879
    },
    {
        "text": "have another one of these same things",
        "start": 2490.4,
        "duration": 4.16
    },
    {
        "text": "square bracket carrot at close bracket",
        "start": 2492.119,
        "duration": 4.281
    },
    {
        "text": "which means any character accept an at",
        "start": 2494.56,
        "duration": 4.48
    },
    {
        "text": "sign then one or more of those things",
        "start": 2496.4,
        "duration": 5.52
    },
    {
        "text": "followed by literally a period",
        "start": 2499.04,
        "duration": 5.92
    },
    {
        "text": "U so now let me go ahead and do this",
        "start": 2501.92,
        "duration": 5.679
    },
    {
        "text": "again let me rerun python of validate",
        "start": 2504.96,
        "duration": 4.399
    },
    {
        "text": "dopy and test my own email address to",
        "start": 2507.599,
        "duration": 4.041
    },
    {
        "text": "make sure I've not made things worse and",
        "start": 2509.359,
        "duration": 3.921
    },
    {
        "text": "we're good now let me go ahead and clear",
        "start": 2511.64,
        "duration": 3.24
    },
    {
        "text": "my screen and run python of validate",
        "start": 2513.28,
        "duration": 2.96
    },
    {
        "text": "dopy again and do",
        "start": 2514.88,
        "duration": 4.88
    },
    {
        "text": "mailin at harvard.edu crossing my",
        "start": 2516.24,
        "duration": 5.92
    },
    {
        "text": "fingers this time and finally this now",
        "start": 2519.76,
        "duration": 5.559
    },
    {
        "text": "is invalid why I'm allowing myself to",
        "start": 2522.16,
        "duration": 5.32
    },
    {
        "text": "have one at sign in the middle of the",
        "start": 2525.319,
        "duration": 4.76
    },
    {
        "text": "user's input but everything to the left",
        "start": 2527.48,
        "duration": 5.599
    },
    {
        "text": "per this new syntax cannot be an at sign",
        "start": 2530.079,
        "duration": 5.921
    },
    {
        "text": "it can be anything but one or more times",
        "start": 2533.079,
        "duration": 4.721
    },
    {
        "text": "and everything to the right of the at",
        "start": 2536.0,
        "duration": 4.359
    },
    {
        "text": "sign can be anything but an at sign one",
        "start": 2537.8,
        "duration": 5.4
    },
    {
        "text": "or more times followed by lastly a",
        "start": 2540.359,
        "duration": 6.161
    },
    {
        "text": "literal. edu so again the new syntax is",
        "start": 2543.2,
        "duration": 4.6
    },
    {
        "text": "quite simply there",
        "start": 2546.52,
        "duration": 3.76
    },
    {
        "text": "square brackets allow you to specify a",
        "start": 2547.8,
        "duration": 4.16
    },
    {
        "text": "set of characters that you literally",
        "start": 2550.28,
        "duration": 4.44
    },
    {
        "text": "type out at your keyboard a b CDE e f or",
        "start": 2551.96,
        "duration": 4.96
    },
    {
        "text": "the complement the opposite the carrot",
        "start": 2554.72,
        "duration": 4.44
    },
    {
        "text": "symbol which means not and then the one",
        "start": 2556.92,
        "duration": 4.72
    },
    {
        "text": "or more symbols you want to",
        "start": 2559.16,
        "duration": 5.439
    },
    {
        "text": "exclude questions now on this syntax",
        "start": 2561.64,
        "duration": 5.84
    },
    {
        "text": "here so right after add sign can we use",
        "start": 2564.599,
        "duration": 5.401
    },
    {
        "text": "the curly brackets M uh one so that we",
        "start": 2567.48,
        "duration": 5.0
    },
    {
        "text": "can only have one repetition of the add",
        "start": 2570.0,
        "duration": 4.64
    },
    {
        "text": "symbol absolutely so we could do this",
        "start": 2572.48,
        "duration": 4.32
    },
    {
        "text": "let me go ahead and pull a VSS code and",
        "start": 2574.64,
        "duration": 4.24
    },
    {
        "text": "let me delete the current form of a",
        "start": 2576.8,
        "duration": 3.519
    },
    {
        "text": "regular expression and go back to where",
        "start": 2578.88,
        "duration": 5.0
    },
    {
        "text": "we began which was justar at andar I",
        "start": 2580.319,
        "duration": 5.76
    },
    {
        "text": "could absolutely do something like this",
        "start": 2583.88,
        "duration": 5.12
    },
    {
        "text": "and require that I want at least one of",
        "start": 2586.079,
        "duration": 5.361
    },
    {
        "text": "any character here and then I could do",
        "start": 2589.0,
        "duration": 4.68
    },
    {
        "text": "something more to have any more as well",
        "start": 2591.44,
        "duration": 4.24
    },
    {
        "text": "so the curly brace syntax which we saw",
        "start": 2593.68,
        "duration": 3.8
    },
    {
        "text": "on the slide earlier but didn't yet use",
        "start": 2595.68,
        "duration": 4.0
    },
    {
        "text": "absolutely can be used to specify a",
        "start": 2597.48,
        "duration": 4.16
    },
    {
        "text": "specific number of characters but",
        "start": 2599.68,
        "duration": 3.8
    },
    {
        "text": "honestly this is more verbose than is",
        "start": 2601.64,
        "duration": 4.4
    },
    {
        "text": "necessary the best solution arguably or",
        "start": 2603.48,
        "duration": 4.76
    },
    {
        "text": "the simplest at least ultimately is just",
        "start": 2606.04,
        "duration": 4.319
    },
    {
        "text": "to say plus but there too another",
        "start": 2608.24,
        "duration": 3.76
    },
    {
        "text": "example of how you can solve the same",
        "start": 2610.359,
        "duration": 4.2
    },
    {
        "text": "problem multiple ways let me go back to",
        "start": 2612.0,
        "duration": 4.24
    },
    {
        "text": "where the regular expression just was",
        "start": 2614.559,
        "duration": 4.601
    },
    {
        "text": "and take other questions as well",
        "start": 2616.24,
        "duration": 6.24
    },
    {
        "text": "questions on these sets of characters or",
        "start": 2619.16,
        "duration": 6.84
    },
    {
        "text": "complimenting that's set so can you use",
        "start": 2622.48,
        "duration": 5.879
    },
    {
        "text": "that same syntax to say that you don't",
        "start": 2626.0,
        "duration": 4.359
    },
    {
        "text": "want a certain character throughout the",
        "start": 2628.359,
        "duration": 6.081
    },
    {
        "text": "whole string you could it's going to be",
        "start": 2630.359,
        "duration": 5.561
    },
    {
        "text": "uh you could absolutely use the same",
        "start": 2634.44,
        "duration": 3.2
    },
    {
        "text": "character to exclude",
        "start": 2635.92,
        "duration": 4.24
    },
    {
        "text": "um you could absolutely use this syntax",
        "start": 2637.64,
        "duration": 4.479
    },
    {
        "text": "to exclude a certain character from the",
        "start": 2640.16,
        "duration": 4.159
    },
    {
        "text": "entire string but it would be a little",
        "start": 2642.119,
        "duration": 3.601
    },
    {
        "text": "harder right now because we're still",
        "start": 2644.319,
        "duration": 5.481
    },
    {
        "text": "requiring doedu at the end but yes",
        "start": 2645.72,
        "duration": 7.04
    },
    {
        "text": "absolutely other questions what happens",
        "start": 2649.8,
        "duration": 6.44
    },
    {
        "text": "if the user inputs do edu in the",
        "start": 2652.76,
        "duration": 6.0
    },
    {
        "text": "beginning of the string a good question",
        "start": 2656.24,
        "duration": 4.68
    },
    {
        "text": "what happens if the user types in edu at",
        "start": 2658.76,
        "duration": 3.48
    },
    {
        "text": "the beginning of the screen well let me",
        "start": 2660.92,
        "duration": 3.199
    },
    {
        "text": "go back to vs code here and let's try to",
        "start": 2662.24,
        "duration": 3.52
    },
    {
        "text": "solve this in two different ways first",
        "start": 2664.119,
        "duration": 3.401
    },
    {
        "text": "let's look at the regular expression and",
        "start": 2665.76,
        "duration": 4.24
    },
    {
        "text": "see if we can infer if that's going to",
        "start": 2667.52,
        "duration": 4.64
    },
    {
        "text": "be tolerated well according to the",
        "start": 2670.0,
        "duration": 5.28
    },
    {
        "text": "current cryptic regular expression I'm",
        "start": 2672.16,
        "duration": 5.36
    },
    {
        "text": "saying that you can have any character",
        "start": 2675.28,
        "duration": 4.44
    },
    {
        "text": "except the at sign so that would work I",
        "start": 2677.52,
        "duration": 4.96
    },
    {
        "text": "could have the dot for the edu but then",
        "start": 2679.72,
        "duration": 5.52
    },
    {
        "text": "I have to have an at sign so that",
        "start": 2682.48,
        "duration": 5.16
    },
    {
        "text": "wouldn't really work because if I'm just",
        "start": 2685.24,
        "duration": 4.76
    },
    {
        "text": "typing in.edu we're not going to pass",
        "start": 2687.64,
        "duration": 4.28
    },
    {
        "text": "that constraint so now let me try this",
        "start": 2690.0,
        "duration": 4.04
    },
    {
        "text": "in uh by running the program let me type",
        "start": 2691.92,
        "duration": 4.56
    },
    {
        "text": "in just literally doedu that doesn't",
        "start": 2694.04,
        "duration": 6.92
    },
    {
        "text": "work but but but I could do this doedu",
        "start": 2696.48,
        "duration": 8.56
    },
    {
        "text": "at.edu that too is invalid but let me do",
        "start": 2700.96,
        "duration": 7.32
    },
    {
        "text": "this uhedu",
        "start": 2705.04,
        "duration": 6.72
    },
    {
        "text": "something. edu that passes so it's",
        "start": 2708.28,
        "duration": 5.4
    },
    {
        "text": "starting to get a little weird now maybe",
        "start": 2711.76,
        "duration": 3.72
    },
    {
        "text": "it's valid maybe it's not but I think",
        "start": 2713.68,
        "duration": 4.52
    },
    {
        "text": "we'll eventually be more precise too how",
        "start": 2715.48,
        "duration": 5.2
    },
    {
        "text": "about one more question on this regular",
        "start": 2718.2,
        "duration": 4.6
    },
    {
        "text": "expression and these complimenting of",
        "start": 2720.68,
        "duration": 6.399
    },
    {
        "text": "sets can we use uh another domain name",
        "start": 2722.8,
        "duration": 6.16
    },
    {
        "text": "as a string input can you use another",
        "start": 2727.079,
        "duration": 3.841
    },
    {
        "text": "domain name absolutely I'm using my own",
        "start": 2728.96,
        "duration": 3.52
    },
    {
        "text": "just for the sake of demonstration but",
        "start": 2730.92,
        "duration": 4.04
    },
    {
        "text": "you could absolutely use any domain or",
        "start": 2732.48,
        "duration": 4.879
    },
    {
        "text": "top level domain and I'm using edu which",
        "start": 2734.96,
        "duration": 3.96
    },
    {
        "text": "is very us-centric but this would",
        "start": 2737.359,
        "duration": 4.48
    },
    {
        "text": "absolutely work exactly the same for any",
        "start": 2738.92,
        "duration": 5.48
    },
    {
        "text": "top level domain all right let me go and",
        "start": 2741.839,
        "duration": 4.72
    },
    {
        "text": "ahead now and propose that we improve",
        "start": 2744.4,
        "duration": 3.84
    },
    {
        "text": "this regular expression further because",
        "start": 2746.559,
        "duration": 4.401
    },
    {
        "text": "if I pull it up again in V vs code here",
        "start": 2748.24,
        "duration": 4.599
    },
    {
        "text": "you'll see that I'm being a little too",
        "start": 2750.96,
        "duration": 4.119
    },
    {
        "text": "tolerant still it turns out that there",
        "start": 2752.839,
        "duration": 4.561
    },
    {
        "text": "are certain requirements for someone's",
        "start": 2755.079,
        "duration": 4.721
    },
    {
        "text": "username and domain name in an email",
        "start": 2757.4,
        "duration": 4.28
    },
    {
        "text": "address there is an official standard in",
        "start": 2759.8,
        "duration": 3.64
    },
    {
        "text": "the world for what an email address can",
        "start": 2761.68,
        "duration": 4.28
    },
    {
        "text": "be and what characters can be in it and",
        "start": 2763.44,
        "duration": 5.52
    },
    {
        "text": "this is way too accommodating of all the",
        "start": 2765.96,
        "duration": 4.84
    },
    {
        "text": "characters in the world except for the",
        "start": 2768.96,
        "duration": 4.28
    },
    {
        "text": "at symbol so let's actually narrow the",
        "start": 2770.8,
        "duration": 3.72
    },
    {
        "text": "definition of what we're going to",
        "start": 2773.24,
        "duration": 3.56
    },
    {
        "text": "tolerate in usernames and companies like",
        "start": 2774.52,
        "duration": 4.839
    },
    {
        "text": "Gmail could certainly do this as well",
        "start": 2776.8,
        "duration": 4.16
    },
    {
        "text": "suppose that it's not just that I want",
        "start": 2779.359,
        "duration": 4.121
    },
    {
        "text": "to exclude at sign suppose that I only",
        "start": 2780.96,
        "duration": 5.159
    },
    {
        "text": "want to allow for say characters that",
        "start": 2783.48,
        "duration": 4.76
    },
    {
        "text": "normally appear in words like letters of",
        "start": 2786.119,
        "duration": 4.521
    },
    {
        "text": "the alphabet A through Z be it uppercase",
        "start": 2788.24,
        "duration": 4.8
    },
    {
        "text": "or lowercase maybe some numbers in heck",
        "start": 2790.64,
        "duration": 3.919
    },
    {
        "text": "maybe even an underscore could be",
        "start": 2793.04,
        "duration": 4.079
    },
    {
        "text": "allowed to well we can use this same",
        "start": 2794.559,
        "duration": 4.8
    },
    {
        "text": "square bracket syntax to specify a set",
        "start": 2797.119,
        "duration": 5.281
    },
    {
        "text": "of characters as follows I could do a b",
        "start": 2799.359,
        "duration": 6.2
    },
    {
        "text": "c d e f g h i j oh my God this is going",
        "start": 2802.4,
        "duration": 4.24
    },
    {
        "text": "to take forever I'm going to have to",
        "start": 2805.559,
        "duration": 3.681
    },
    {
        "text": "type out all 26 letters of the alphabet",
        "start": 2806.64,
        "duration": 4.719
    },
    {
        "text": "both lowercase and uppercase so let me",
        "start": 2809.24,
        "duration": 3.76
    },
    {
        "text": "stop doing that there's a better way",
        "start": 2811.359,
        "duration": 3.76
    },
    {
        "text": "already if you want to specify Within",
        "start": 2813.0,
        "duration": 5.119
    },
    {
        "text": "These square brackets a range of letters",
        "start": 2815.119,
        "duration": 5.641
    },
    {
        "text": "you can actually just do a hyphen if you",
        "start": 2818.119,
        "duration": 6.081
    },
    {
        "text": "literally do a hyphen Z in these square",
        "start": 2820.76,
        "duration": 5.359
    },
    {
        "text": "brackets the computer is going to know",
        "start": 2824.2,
        "duration": 4.08
    },
    {
        "text": "you mean a through z you do not need to",
        "start": 2826.119,
        "duration": 4.761
    },
    {
        "text": "type 26 letters of the alphabet if you",
        "start": 2828.28,
        "duration": 4.36
    },
    {
        "text": "want to include uppercase letters as",
        "start": 2830.88,
        "duration": 4.239
    },
    {
        "text": "well you just do the same no spaces no",
        "start": 2832.64,
        "duration": 5.0
    },
    {
        "text": "commas you literally just keep typing a",
        "start": 2835.119,
        "duration": 5.881
    },
    {
        "text": "through capital Z so I have little a",
        "start": 2837.64,
        "duration": 7.0
    },
    {
        "text": "hyphen little Z big a hyphen big Z no",
        "start": 2841.0,
        "duration": 6.04
    },
    {
        "text": "spaces no commas no separators you just",
        "start": 2844.64,
        "duration": 4.56
    },
    {
        "text": "keep specifying those ranges if I",
        "start": 2847.04,
        "duration": 4.72
    },
    {
        "text": "additionally want numbers I could do 0 1",
        "start": 2849.2,
        "duration": 4.68
    },
    {
        "text": "2 3 4 NOP you don't need to type in all",
        "start": 2851.76,
        "duration": 4.96
    },
    {
        "text": "10 decimal digits you can just say 0",
        "start": 2853.88,
        "duration": 5.4
    },
    {
        "text": "through n using a hyphen as well and if",
        "start": 2856.72,
        "duration": 4.68
    },
    {
        "text": "you now want to support underscores as",
        "start": 2859.28,
        "duration": 3.64
    },
    {
        "text": "well which is pretty common in user",
        "start": 2861.4,
        "duration": 3.24
    },
    {
        "text": "names for email addresses you can",
        "start": 2862.92,
        "duration": 4.24
    },
    {
        "text": "literally just type in underscore at the",
        "start": 2864.64,
        "duration": 5.16
    },
    {
        "text": "at the end notice that all of these",
        "start": 2867.16,
        "duration": 5.48
    },
    {
        "text": "characters are inside of square brackets",
        "start": 2869.8,
        "duration": 5.44
    },
    {
        "text": "which just again means here is a set of",
        "start": 2872.64,
        "duration": 5.12
    },
    {
        "text": "characters that I want to allow I have",
        "start": 2875.24,
        "duration": 5.359
    },
    {
        "text": "not used a carrot symbol at the",
        "start": 2877.76,
        "duration": 4.599
    },
    {
        "text": "beginning of this whole thing because I",
        "start": 2880.599,
        "duration": 3.921
    },
    {
        "text": "don't want to complement it complement",
        "start": 2882.359,
        "duration": 4.681
    },
    {
        "text": "it with an E not complement it with an i",
        "start": 2884.52,
        "duration": 4.12
    },
    {
        "text": "I want don't want to complement it by",
        "start": 2887.04,
        "duration": 3.84
    },
    {
        "text": "making it the opposite I literally want",
        "start": 2888.64,
        "duration": 4.919
    },
    {
        "text": "to accept only these characters I'm",
        "start": 2890.88,
        "duration": 4.0
    },
    {
        "text": "going to go ahead and do the same thing",
        "start": 2893.559,
        "duration": 4.161
    },
    {
        "text": "on the right if I want to require that",
        "start": 2894.88,
        "duration": 5.199
    },
    {
        "text": "the domain name similarly come from this",
        "start": 2897.72,
        "duration": 4.2
    },
    {
        "text": "set of characters which admittedly is a",
        "start": 2900.079,
        "duration": 3.601
    },
    {
        "text": "little too narrow but it's familiar for",
        "start": 2901.92,
        "duration": 3.6
    },
    {
        "text": "now so we'll keep it simple I'm going to",
        "start": 2903.68,
        "duration": 3.84
    },
    {
        "text": "go ahead and paste that exact same set",
        "start": 2905.52,
        "duration": 5.079
    },
    {
        "text": "of characters over there to the right",
        "start": 2907.52,
        "duration": 6.28
    },
    {
        "text": "and so now it's much more restrictive",
        "start": 2910.599,
        "duration": 5.041
    },
    {
        "text": "now I'm going to go ahead and run python",
        "start": 2913.8,
        "duration": 3.559
    },
    {
        "text": "of validate I'm going to test my own",
        "start": 2915.64,
        "duration": 3.919
    },
    {
        "text": "email address and we're still good I'm",
        "start": 2917.359,
        "duration": 3.921
    },
    {
        "text": "going to clear my screen and run it once",
        "start": 2919.559,
        "duration": 5.321
    },
    {
        "text": "more this time trying to break it let me",
        "start": 2921.28,
        "duration": 6.72
    },
    {
        "text": "go ahead and do something like how about",
        "start": 2924.88,
        "duration": 7.64
    },
    {
        "text": "davidor maen harvard.edu enter but that",
        "start": 2928.0,
        "duration": 7.319
    },
    {
        "text": "too is going to be valid but if I do",
        "start": 2932.52,
        "duration": 6.319
    },
    {
        "text": "something completely wrong again like ma",
        "start": 2935.319,
        "duration": 6.841
    },
    {
        "text": "harvard.edu that's still going to be",
        "start": 2938.839,
        "duration": 5.401
    },
    {
        "text": "invalid why because my regular",
        "start": 2942.16,
        "duration": 4.12
    },
    {
        "text": "expression currently only allows for a",
        "start": 2944.24,
        "duration": 4.119
    },
    {
        "text": "single at in the middle because",
        "start": 2946.28,
        "duration": 4.319
    },
    {
        "text": "everything to the left must be alpha",
        "start": 2948.359,
        "duration": 5.081
    },
    {
        "text": "numeric alphabetical or numeric or an",
        "start": 2950.599,
        "duration": 5.441
    },
    {
        "text": "underscore the same thing to the right",
        "start": 2953.44,
        "duration": 6.24
    },
    {
        "text": "followed by the edu now honestly this is",
        "start": 2956.04,
        "duration": 5.44
    },
    {
        "text": "a regular expression that you might be",
        "start": 2959.68,
        "duration": 3.879
    },
    {
        "text": "in the habit of typing in the real world",
        "start": 2961.48,
        "duration": 4.4
    },
    {
        "text": "as in as cryptic as this might look this",
        "start": 2963.559,
        "duration": 4.28
    },
    {
        "text": "is the world of regular Expressions so",
        "start": 2965.88,
        "duration": 3.32
    },
    {
        "text": "you'll get more comfortable with this",
        "start": 2967.839,
        "duration": 3.96
    },
    {
        "text": "syntax over time but thankfully some of",
        "start": 2969.2,
        "duration": 5.0
    },
    {
        "text": "these patterns are so common that there",
        "start": 2971.799,
        "duration": 5.04
    },
    {
        "text": "are builtin shortcuts for representing",
        "start": 2974.2,
        "duration": 4.96
    },
    {
        "text": "some of the same information that is to",
        "start": 2976.839,
        "duration": 4.401
    },
    {
        "text": "say you don't have to constantly type",
        "start": 2979.16,
        "duration": 3.919
    },
    {
        "text": "out all of the symbols that you want to",
        "start": 2981.24,
        "duration": 3.28
    },
    {
        "text": "include because odds are some other",
        "start": 2983.079,
        "duration": 3.401
    },
    {
        "text": "programmer has had the same problem so",
        "start": 2984.52,
        "duration": 3.96
    },
    {
        "text": "built into regular Expressions",
        "start": 2986.48,
        "duration": 3.839
    },
    {
        "text": "themselves are some additional patterns",
        "start": 2988.48,
        "duration": 4.56
    },
    {
        "text": "you can use and in fact I can go ahead",
        "start": 2990.319,
        "duration": 5.52
    },
    {
        "text": "and get rid of this entire set a through",
        "start": 2993.04,
        "duration": 5.319
    },
    {
        "text": "z lowercase A through Z uppercase 0",
        "start": 2995.839,
        "duration": 4.601
    },
    {
        "text": "through 9 in an underscore and just",
        "start": 2998.359,
        "duration": 5.641
    },
    {
        "text": "replace it with a single back slw back",
        "start": 3000.44,
        "duration": 6.119
    },
    {
        "text": "slw in this case represents a word",
        "start": 3004.0,
        "duration": 5.28
    },
    {
        "text": "character which is commonly known as a",
        "start": 3006.559,
        "duration": 6.841
    },
    {
        "text": "alpha numeric symbol or the underscore",
        "start": 3009.28,
        "duration": 5.88
    },
    {
        "text": "as well I'm going to do the same thing",
        "start": 3013.4,
        "duration": 3.12
    },
    {
        "text": "over here I'm going to highlight the",
        "start": 3015.16,
        "duration": 3.639
    },
    {
        "text": "entire set of square brackets delete it",
        "start": 3016.52,
        "duration": 5.12
    },
    {
        "text": "and replace it with a single back slw",
        "start": 3018.799,
        "duration": 4.601
    },
    {
        "text": "and now I feel like we're making",
        "start": 3021.64,
        "duration": 2.919
    },
    {
        "text": "progress because even though it's",
        "start": 3023.4,
        "duration": 2.84
    },
    {
        "text": "cryptic and what if it looked way",
        "start": 3024.559,
        "duration": 5.161
    },
    {
        "text": "cryptic a little bit ago um and even",
        "start": 3026.24,
        "duration": 4.599
    },
    {
        "text": "though it would have looked even more",
        "start": 3029.72,
        "duration": 3.16
    },
    {
        "text": "cryptic a little bit ago now it's at",
        "start": 3030.839,
        "duration": 3.881
    },
    {
        "text": "least starting to read a little more",
        "start": 3032.88,
        "duration": 4.12
    },
    {
        "text": "friendly the carrot on the left means",
        "start": 3034.72,
        "duration": 3.72
    },
    {
        "text": "start matching at the beginning of the",
        "start": 3037.0,
        "duration": 5.119
    },
    {
        "text": "string back slw means any word character",
        "start": 3038.44,
        "duration": 6.359
    },
    {
        "text": "the plus means one or more at symbol",
        "start": 3042.119,
        "duration": 5.0
    },
    {
        "text": "literally then another word character",
        "start": 3044.799,
        "duration": 4.841
    },
    {
        "text": "one or more then a literal dot then",
        "start": 3047.119,
        "duration": 5.2
    },
    {
        "text": "literally edu and then match at the very",
        "start": 3049.64,
        "duration": 4.76
    },
    {
        "text": "end of the string and that's it so",
        "start": 3052.319,
        "duration": 3.681
    },
    {
        "text": "there's more of these two and we won't",
        "start": 3054.4,
        "duration": 4.56
    },
    {
        "text": "use them all here but here is a partial",
        "start": 3056.0,
        "duration": 5.599
    },
    {
        "text": "list of the patterns you can use within",
        "start": 3058.96,
        "duration": 5.72
    },
    {
        "text": "a regular expression one you have backd",
        "start": 3061.599,
        "duration": 5.081
    },
    {
        "text": "for any decimal digit decimal digit",
        "start": 3064.68,
        "duration": 5.2
    },
    {
        "text": "meaning 0 through n commonly done here",
        "start": 3066.68,
        "duration": 5.56
    },
    {
        "text": "too is if you want to do the opposite of",
        "start": 3069.88,
        "duration": 4.56
    },
    {
        "text": "that the complement so to speak you can",
        "start": 3072.24,
        "duration": 5.0
    },
    {
        "text": "do back slash capital D which is",
        "start": 3074.44,
        "duration": 5.159
    },
    {
        "text": "anything that's not a decimal digit so",
        "start": 3077.24,
        "duration": 5.359
    },
    {
        "text": "it might be letters and punctuation and",
        "start": 3079.599,
        "duration": 6.081
    },
    {
        "text": "other symbols as well Meanwhile Back SLS",
        "start": 3082.599,
        "duration": 5.2
    },
    {
        "text": "means wh space characters like a single",
        "start": 3085.68,
        "duration": 4.04
    },
    {
        "text": "hit of the space or maybe hitting tab on",
        "start": 3087.799,
        "duration": 4.881
    },
    {
        "text": "the keyboard that's Whit space back SL",
        "start": 3089.72,
        "duration": 5.28
    },
    {
        "text": "capital S is the opposite or complement",
        "start": 3092.68,
        "duration": 4.72
    },
    {
        "text": "of that anything that's not a whit space",
        "start": 3095.0,
        "duration": 5.119
    },
    {
        "text": "character back slw we've seen a word",
        "start": 3097.4,
        "duration": 5.159
    },
    {
        "text": "character as well as numbers and the",
        "start": 3100.119,
        "duration": 4.161
    },
    {
        "text": "underscore and if you want the",
        "start": 3102.559,
        "duration": 3.641
    },
    {
        "text": "complement or opposite of that you can",
        "start": 3104.28,
        "duration": 4.559
    },
    {
        "text": "use back SL capital W to give you",
        "start": 3106.2,
        "duration": 4.96
    },
    {
        "text": "everything but a word character again",
        "start": 3108.839,
        "duration": 4.041
    },
    {
        "text": "these are just common patterns that so",
        "start": 3111.16,
        "duration": 3.24
    },
    {
        "text": "many people were presumably using in",
        "start": 3112.88,
        "duration": 3.919
    },
    {
        "text": "yester year that it's now baked into the",
        "start": 3114.4,
        "duration": 4.56
    },
    {
        "text": "regular expression syntax so that you",
        "start": 3116.799,
        "duration": 5.0
    },
    {
        "text": "can more succinctly express your same",
        "start": 3118.96,
        "duration": 5.639
    },
    {
        "text": "ideas any questions then on this",
        "start": 3121.799,
        "duration": 5.8
    },
    {
        "text": "approach here where we're now using",
        "start": 3124.599,
        "duration": 6.52
    },
    {
        "text": "backw to represent my word",
        "start": 3127.599,
        "duration": 6.361
    },
    {
        "text": "character uh so what I want to ask about",
        "start": 3131.119,
        "duration": 4.561
    },
    {
        "text": "was the actually the previous approach",
        "start": 3133.96,
        "duration": 3.8
    },
    {
        "text": "like the square bracket approach could",
        "start": 3135.68,
        "duration": 4.72
    },
    {
        "text": "we accept like uh lists in there yes",
        "start": 3137.76,
        "duration": 4.68
    },
    {
        "text": "we'll see this before long but suppose",
        "start": 3140.4,
        "duration": 4.679
    },
    {
        "text": "you wanted to tolerate not just edu but",
        "start": 3142.44,
        "duration": 4.96
    },
    {
        "text": "maybe edu or",
        "start": 3145.079,
        "duration": 4.48
    },
    {
        "text": "you could do this you could introduce",
        "start": 3147.4,
        "duration": 4.679
    },
    {
        "text": "parentheses and then you can or those",
        "start": 3149.559,
        "duration": 6.04
    },
    {
        "text": "together I could say Comm or edu I could",
        "start": 3152.079,
        "duration": 6.401
    },
    {
        "text": "also add in something like in the US or",
        "start": 3155.599,
        "duration": 6.441
    },
    {
        "text": "gov or net or anything else or org or",
        "start": 3158.48,
        "duration": 5.56
    },
    {
        "text": "the like and each of the vertical bars",
        "start": 3162.04,
        "duration": 4.16
    },
    {
        "text": "here means something special it means or",
        "start": 3164.04,
        "duration": 4.039
    },
    {
        "text": "and the parentheses simply group things",
        "start": 3166.2,
        "duration": 4.0
    },
    {
        "text": "together formally you have this syntax",
        "start": 3168.079,
        "duration": 6.681
    },
    {
        "text": "here A or B A or vertical Bar B means a",
        "start": 3170.2,
        "duration": 6.52
    },
    {
        "text": "has to match or B has to match where A",
        "start": 3174.76,
        "duration": 4.48
    },
    {
        "text": "and B can be any other patterns you want",
        "start": 3176.72,
        "duration": 4.04
    },
    {
        "text": "in parentheses you can group those",
        "start": 3179.24,
        "duration": 3.599
    },
    {
        "text": "things together so just like math you",
        "start": 3180.76,
        "duration": 4.96
    },
    {
        "text": "can uh combine ideas into one phrase and",
        "start": 3182.839,
        "duration": 4.881
    },
    {
        "text": "do this thing or the other um and",
        "start": 3185.72,
        "duration": 3.399
    },
    {
        "text": "there's other syntax as well that we'll",
        "start": 3187.72,
        "duration": 3.48
    },
    {
        "text": "soon see other questions on these",
        "start": 3189.119,
        "duration": 5.48
    },
    {
        "text": "regular expressions and this syntax here",
        "start": 3191.2,
        "duration": 6.08
    },
    {
        "text": "what if we put spaces in the expression",
        "start": 3194.599,
        "duration": 5.041
    },
    {
        "text": "sure so if you want spaces in there you",
        "start": 3197.28,
        "duration": 5.279
    },
    {
        "text": "can't use backw alone because that is",
        "start": 3199.64,
        "duration": 4.52
    },
    {
        "text": "only a word character which is",
        "start": 3202.559,
        "duration": 4.04
    },
    {
        "text": "alphabetical numerical or the under",
        "start": 3204.16,
        "duration": 4.8
    },
    {
        "text": "score but you could do this you could go",
        "start": 3206.599,
        "duration": 4.601
    },
    {
        "text": "back to this approach whereby you use uh",
        "start": 3208.96,
        "duration": 3.92
    },
    {
        "text": "square brackets and you could say A",
        "start": 3211.2,
        "duration": 6.0
    },
    {
        "text": "through Z or a through z or 0 through 9",
        "start": 3212.88,
        "duration": 6.199
    },
    {
        "text": "or underscore or I'm going to hit the",
        "start": 3217.2,
        "duration": 3.96
    },
    {
        "text": "space bar a single space you can put a",
        "start": 3219.079,
        "duration": 3.72
    },
    {
        "text": "literal space inside of the square",
        "start": 3221.16,
        "duration": 3.36
    },
    {
        "text": "brackets which will allow you then to",
        "start": 3222.799,
        "duration": 4.721
    },
    {
        "text": "detect a space alternatively I could",
        "start": 3224.52,
        "duration": 5.88
    },
    {
        "text": "still use back slw but I could combine",
        "start": 3227.52,
        "duration": 4.76
    },
    {
        "text": "it as follows I could say give me a back",
        "start": 3230.4,
        "duration": 4.919
    },
    {
        "text": "slw or a back slash S because recall",
        "start": 3232.28,
        "duration": 5.36
    },
    {
        "text": "that back SLS is white space so it's",
        "start": 3235.319,
        "duration": 3.721
    },
    {
        "text": "even more than a single space it could",
        "start": 3237.64,
        "duration": 3.4
    },
    {
        "text": "be a tab but by putting those things in",
        "start": 3239.04,
        "duration": 4.16
    },
    {
        "text": "parentheses now you can match either the",
        "start": 3241.04,
        "duration": 4.079
    },
    {
        "text": "thing on the left or the thing on the",
        "start": 3243.2,
        "duration": 4.639
    },
    {
        "text": "right one or more times how about one",
        "start": 3245.119,
        "duration": 6.44
    },
    {
        "text": "other question on these regular",
        "start": 3247.839,
        "duration": 3.72
    },
    {
        "text": "Expressions perfect so I was going to",
        "start": 3251.68,
        "duration": 6.24
    },
    {
        "text": "ask um does the back slw um include a",
        "start": 3253.64,
        "duration": 8.04
    },
    {
        "text": "DOT uh because no nope it only includes",
        "start": 3257.92,
        "duration": 6.48
    },
    {
        "text": "letters numbers uh and underscore that",
        "start": 3261.68,
        "duration": 5.32
    },
    {
        "text": "is it and I was wondering you gave an",
        "start": 3264.4,
        "duration": 4.959
    },
    {
        "text": "example at the beginning that had uh",
        "start": 3267.0,
        "duration": 6.24
    },
    {
        "text": "spaces like this is my email so on so um",
        "start": 3269.359,
        "duration": 7.081
    },
    {
        "text": "I don't think our current version even",
        "start": 3273.24,
        "duration": 5.0
    },
    {
        "text": "quite quite a long while ago stopped",
        "start": 3276.44,
        "duration": 3.84
    },
    {
        "text": "accepting it was that because of the",
        "start": 3278.24,
        "duration": 3.8
    },
    {
        "text": "carrot uh",
        "start": 3280.28,
        "duration": 4.72
    },
    {
        "text": "or because of something no the reason I",
        "start": 3282.04,
        "duration": 5.36
    },
    {
        "text": "was handling spaces and other English",
        "start": 3285.0,
        "duration": 4.52
    },
    {
        "text": "words when I typed out my email address",
        "start": 3287.4,
        "duration": 4.919
    },
    {
        "text": "as mailin at harvard.edu was because we",
        "start": 3289.52,
        "duration": 5.88
    },
    {
        "text": "were using initially star or plus which",
        "start": 3292.319,
        "duration": 5.0
    },
    {
        "text": "is any character",
        "start": 3295.4,
        "duration": 4.52
    },
    {
        "text": "uh and even after that we said anything",
        "start": 3297.319,
        "duration": 5.681
    },
    {
        "text": "except the at sign which includes spaces",
        "start": 3299.92,
        "duration": 5.639
    },
    {
        "text": "only once I started using square",
        "start": 3303.0,
        "duration": 5.28
    },
    {
        "text": "brackets and a through z and 0 through 9",
        "start": 3305.559,
        "duration": 5.321
    },
    {
        "text": "and underscore did we finally get to the",
        "start": 3308.28,
        "duration": 4.96
    },
    {
        "text": "point where we would reject wh space and",
        "start": 3310.88,
        "duration": 4.52
    },
    {
        "text": "in fact I can run this here let me go",
        "start": 3313.24,
        "duration": 4.04
    },
    {
        "text": "into the current version of my code in",
        "start": 3315.4,
        "duration": 4.199
    },
    {
        "text": "VSS code which is using again the back",
        "start": 3317.28,
        "duration": 4.88
    },
    {
        "text": "WS for word characters let me run python",
        "start": 3319.599,
        "duration": 4.881
    },
    {
        "text": "of validate and incorrectly type in",
        "start": 3322.16,
        "duration": 6.0
    },
    {
        "text": "something like my email address is maen",
        "start": 3324.48,
        "duration": 6.76
    },
    {
        "text": "harvard.edu period which has spaces to",
        "start": 3328.16,
        "duration": 5.48
    },
    {
        "text": "the left of my username and that is now",
        "start": 3331.24,
        "duration": 4.68
    },
    {
        "text": "invalid because space is not a word",
        "start": 3333.64,
        "duration": 4.28
    },
    {
        "text": "character yorgo notes too that",
        "start": 3335.92,
        "duration": 4.0
    },
    {
        "text": "technically I'm not allowing dots and",
        "start": 3337.92,
        "duration": 3.199
    },
    {
        "text": "some of you might be thinking wait a",
        "start": 3339.92,
        "duration": 4.199
    },
    {
        "text": "minute my gmail address has a dot in it",
        "start": 3341.119,
        "duration": 4.161
    },
    {
        "text": "that's something we're going to still",
        "start": 3344.119,
        "duration": 4.2
    },
    {
        "text": "have to fix a back slw is not the end",
        "start": 3345.28,
        "duration": 5.24
    },
    {
        "text": "all here it's just allowing us to",
        "start": 3348.319,
        "duration": 4.561
    },
    {
        "text": "express our previous solution a little",
        "start": 3350.52,
        "duration": 4.96
    },
    {
        "text": "more succinctly now one thing we're",
        "start": 3352.88,
        "duration": 4.439
    },
    {
        "text": "still not handling quite properly is",
        "start": 3355.48,
        "duration": 4.879
    },
    {
        "text": "uppercase versus lowercase the back slw",
        "start": 3357.319,
        "duration": 4.601
    },
    {
        "text": "technically does handle lowercase",
        "start": 3360.359,
        "duration": 3.401
    },
    {
        "text": "letters and uppercase because it's the",
        "start": 3361.92,
        "duration": 4.56
    },
    {
        "text": "exact same thing as that set from before",
        "start": 3363.76,
        "duration": 5.039
    },
    {
        "text": "which had little a through little Z and",
        "start": 3366.48,
        "duration": 5.119
    },
    {
        "text": "big a through big Z but watch this let",
        "start": 3368.799,
        "duration": 4.601
    },
    {
        "text": "me go ahead and my current form run",
        "start": 3371.599,
        "duration": 4.0
    },
    {
        "text": "python to validate dopy and just because",
        "start": 3373.4,
        "duration": 4.52
    },
    {
        "text": "my caps slot key is down maen",
        "start": 3375.599,
        "duration": 5.601
    },
    {
        "text": "harvard.edu shouting my email address",
        "start": 3377.92,
        "duration": 5.679
    },
    {
        "text": "it's going to be okay in terms of the ma",
        "start": 3381.2,
        "duration": 4.0
    },
    {
        "text": "it's going to be okay in terms of the",
        "start": 3383.599,
        "duration": 3.841
    },
    {
        "text": "Harvard because those are matching the",
        "start": 3385.2,
        "duration": 5.159
    },
    {
        "text": "back slw which does include lowercase",
        "start": 3387.44,
        "duration": 6.24
    },
    {
        "text": "and uppercase but I'm about to see",
        "start": 3390.359,
        "duration": 8.841
    },
    {
        "text": "invalid why why is mail at harvard.edu",
        "start": 3393.68,
        "duration": 8.32
    },
    {
        "text": "invalid when it's in all caps here even",
        "start": 3399.2,
        "duration": 4.32
    },
    {
        "text": "though I'm using",
        "start": 3402.0,
        "duration": 5.359
    },
    {
        "text": "backw yeah so you are asking for the",
        "start": 3403.52,
        "duration": 6.76
    },
    {
        "text": "domain. edu in lowercase and you're",
        "start": 3407.359,
        "duration": 5.841
    },
    {
        "text": "typing it in an uppercase exactly I'm",
        "start": 3410.28,
        "duration": 5.16
    },
    {
        "text": "typing in my email address in all",
        "start": 3413.2,
        "duration": 4.2
    },
    {
        "text": "uppercase but I'm looking for literally",
        "start": 3415.44,
        "duration": 4.2
    },
    {
        "text": "edu and as I see you with airpods and so",
        "start": 3417.4,
        "duration": 3.84
    },
    {
        "text": "many of you with headphones I apologize",
        "start": 3419.64,
        "duration": 3.159
    },
    {
        "text": "for yelling into my microphone just now",
        "start": 3421.24,
        "duration": 3.48
    },
    {
        "text": "to make this point but let's see if we",
        "start": 3422.799,
        "duration": 5.04
    },
    {
        "text": "can't fix that well if my pattern on",
        "start": 3424.72,
        "duration": 6.359
    },
    {
        "text": "line five is expecting it to be",
        "start": 3427.839,
        "duration": 5.2
    },
    {
        "text": "lowercase there's actually a few ways I",
        "start": 3431.079,
        "duration": 3.641
    },
    {
        "text": "can solve this one would be something",
        "start": 3433.039,
        "duration": 3.881
    },
    {
        "text": "we've seen before I could just force the",
        "start": 3434.72,
        "duration": 4.56
    },
    {
        "text": "user's input to all lowercase and I",
        "start": 3436.92,
        "duration": 4.48
    },
    {
        "text": "could put onto the end of my first line",
        "start": 3439.28,
        "duration": 4.36
    },
    {
        "text": "do lower and actually force it all to",
        "start": 3441.4,
        "duration": 4.48
    },
    {
        "text": "lowercase alternatively I could do that",
        "start": 3443.64,
        "duration": 4.24
    },
    {
        "text": "a little later instead of passing in",
        "start": 3445.88,
        "duration": 4.12
    },
    {
        "text": "email I could pass in the lowercase",
        "start": 3447.88,
        "duration": 4.04
    },
    {
        "text": "version of email because email addresses",
        "start": 3450.0,
        "duration": 3.96
    },
    {
        "text": "should in fact be case insensitive so",
        "start": 3451.92,
        "duration": 3.76
    },
    {
        "text": "that would work too but there's another",
        "start": 3453.96,
        "duration": 3.839
    },
    {
        "text": "mechanism here which is worth seeing it",
        "start": 3455.68,
        "duration": 5.0
    },
    {
        "text": "turns out that that function before",
        "start": 3457.799,
        "duration": 6.24
    },
    {
        "text": "called re. search supports recall a",
        "start": 3460.68,
        "duration": 5.48
    },
    {
        "text": "third argument as well these so-called",
        "start": 3464.039,
        "duration": 4.241
    },
    {
        "text": "flags and flags are configuration",
        "start": 3466.16,
        "duration": 3.6
    },
    {
        "text": "options typically to a function that",
        "start": 3468.28,
        "duration": 3.279
    },
    {
        "text": "allow you to configure it a little",
        "start": 3469.76,
        "duration": 3.76
    },
    {
        "text": "differently and how might I go about",
        "start": 3471.559,
        "duration": 5.04
    },
    {
        "text": "configuring this call to re. search a",
        "start": 3473.52,
        "duration": 5.2
    },
    {
        "text": "little bit differently in so far as I'm",
        "start": 3476.599,
        "duration": 4.401
    },
    {
        "text": "currently only passing in two arguments",
        "start": 3478.72,
        "duration": 4.16
    },
    {
        "text": "well it turns out that some of the flags",
        "start": 3481.0,
        "duration": 4.119
    },
    {
        "text": "you can pass into this function are",
        "start": 3482.88,
        "duration": 4.52
    },
    {
        "text": "these it turns out that the regular",
        "start": 3485.119,
        "duration": 6.121
    },
    {
        "text": "expression library in Python AKA re",
        "start": 3487.4,
        "duration": 6.08
    },
    {
        "text": "comes with a few built-in variables so",
        "start": 3491.24,
        "duration": 4.16
    },
    {
        "text": "to speak things that you can think of as",
        "start": 3493.48,
        "duration": 5.72
    },
    {
        "text": "constants that have meaning to re.",
        "start": 3495.4,
        "duration": 6.639
    },
    {
        "text": "search and they do so as follows if you",
        "start": 3499.2,
        "duration": 5.68
    },
    {
        "text": "pass in as a flag re. ignore case what",
        "start": 3502.039,
        "duration": 4.961
    },
    {
        "text": "re. search is going to do is ignore the",
        "start": 3504.88,
        "duration": 3.88
    },
    {
        "text": "case of the user's input it can be",
        "start": 3507.0,
        "duration": 3.319
    },
    {
        "text": "uppercase lower case a combination",
        "start": 3508.76,
        "duration": 3.52
    },
    {
        "text": "thereof the case is going to be ignored",
        "start": 3510.319,
        "duration": 4.201
    },
    {
        "text": "it will be treated case insensitively",
        "start": 3512.28,
        "duration": 3.519
    },
    {
        "text": "and you can do other things too that we",
        "start": 3514.52,
        "duration": 3.279
    },
    {
        "text": "won't do here but if you want to handle",
        "start": 3515.799,
        "duration": 3.8
    },
    {
        "text": "the user's input that maybe spans",
        "start": 3517.799,
        "duration": 3.56
    },
    {
        "text": "multiple lines maybe they didn't just",
        "start": 3519.599,
        "duration": 3.76
    },
    {
        "text": "type in an email address but an entire",
        "start": 3521.359,
        "duration": 4.081
    },
    {
        "text": "paragraph of text and you want to match",
        "start": 3523.359,
        "duration": 3.801
    },
    {
        "text": "different lines of that text that is",
        "start": 3525.44,
        "duration": 4.639
    },
    {
        "text": "multiple lines another flag is for re.",
        "start": 3527.16,
        "duration": 5.72
    },
    {
        "text": "multi-line for just that or re doall",
        "start": 3530.079,
        "duration": 5.081
    },
    {
        "text": "whereby you can con uh you can configure",
        "start": 3532.88,
        "duration": 5.36
    },
    {
        "text": "the DOT to rep to recognize not just any",
        "start": 3535.16,
        "duration": 5.439
    },
    {
        "text": "character except new lines but any",
        "start": 3538.24,
        "duration": 4.839
    },
    {
        "text": "character plus new lines as well but for",
        "start": 3540.599,
        "duration": 4.24
    },
    {
        "text": "now let me go ahead and just make use of",
        "start": 3543.079,
        "duration": 3.841
    },
    {
        "text": "this first one let me pass in a third",
        "start": 3544.839,
        "duration": 5.361
    },
    {
        "text": "argument to re. search which is",
        "start": 3546.92,
        "duration": 7.439
    },
    {
        "text": "re. uh ignore case let me now rerun the",
        "start": 3550.2,
        "duration": 5.839
    },
    {
        "text": "program without clearing my screen",
        "start": 3554.359,
        "duration": 4.0
    },
    {
        "text": "python of validate dopy let me type in",
        "start": 3556.039,
        "duration": 4.681
    },
    {
        "text": "again in all caps effectively shouting",
        "start": 3558.359,
        "duration": 5.841
    },
    {
        "text": "maen harvard.edu enter and now it's",
        "start": 3560.72,
        "duration": 5.92
    },
    {
        "text": "considered valid because I'm telling re.",
        "start": 3564.2,
        "duration": 4.359
    },
    {
        "text": "search specifically to ignore the case",
        "start": 3566.64,
        "duration": 4.24
    },
    {
        "text": "of the input and that to here is fine",
        "start": 3568.559,
        "duration": 3.961
    },
    {
        "text": "and why might I do this approach rather",
        "start": 3570.88,
        "duration": 3.8
    },
    {
        "text": "than call do lower in one of those other",
        "start": 3572.52,
        "duration": 4.12
    },
    {
        "text": "locations if I don't actually want to",
        "start": 3574.68,
        "duration": 3.76
    },
    {
        "text": "change the user's input for whatever",
        "start": 3576.64,
        "duration": 3.84
    },
    {
        "text": "reason I can still treat it case",
        "start": 3578.44,
        "duration": 4.8
    },
    {
        "text": "insensitively without actually changing",
        "start": 3580.48,
        "duration": 5.76
    },
    {
        "text": "the value of that variable itself all",
        "start": 3583.24,
        "duration": 5.119
    },
    {
        "text": "right any final questions now on this",
        "start": 3586.24,
        "duration": 4.24
    },
    {
        "text": "validation of email",
        "start": 3588.359,
        "duration": 5.881
    },
    {
        "text": "addresses uh so the pattern is a string",
        "start": 3590.48,
        "duration": 8.0
    },
    {
        "text": "right M uh can use an F string you can",
        "start": 3594.24,
        "duration": 6.0
    },
    {
        "text": "yes you can use an F string so that you",
        "start": 3598.48,
        "duration": 3.879
    },
    {
        "text": "could plug in for instance the value of",
        "start": 3600.24,
        "duration": 4.64
    },
    {
        "text": "a variable and pass it into the function",
        "start": 3602.359,
        "duration": 4.921
    },
    {
        "text": "other questions on this access W",
        "start": 3604.88,
        "duration": 4.52
    },
    {
        "text": "character could we take it as an input",
        "start": 3607.28,
        "duration": 4.48
    },
    {
        "text": "from the user technically yes that's not",
        "start": 3609.4,
        "duration": 3.8
    },
    {
        "text": "a problem we're trying to solve right",
        "start": 3611.76,
        "duration": 3.279
    },
    {
        "text": "now we want the user to provide literal",
        "start": 3613.2,
        "duration": 3.599
    },
    {
        "text": "input like their email address not",
        "start": 3615.039,
        "duration": 4.241
    },
    {
        "text": "necessarily a regular expression but you",
        "start": 3616.799,
        "duration": 4.161
    },
    {
        "text": "could imagine building software that",
        "start": 3619.28,
        "duration": 3.44
    },
    {
        "text": "asks the user especially if they're more",
        "start": 3620.96,
        "duration": 3.44
    },
    {
        "text": "advanced users to type in a regular",
        "start": 3622.72,
        "duration": 3.92
    },
    {
        "text": "expression for some reason to validate",
        "start": 3624.4,
        "duration": 3.76
    },
    {
        "text": "something else against that and in fact",
        "start": 3626.64,
        "duration": 3.439
    },
    {
        "text": "that's what Google's doing if you play",
        "start": 3628.16,
        "duration": 3.72
    },
    {
        "text": "around with Google forms and create a",
        "start": 3630.079,
        "duration": 4.24
    },
    {
        "text": "form with response validation and select",
        "start": 3631.88,
        "duration": 5.36
    },
    {
        "text": "regular expression Google lets you and I",
        "start": 3634.319,
        "duration": 4.641
    },
    {
        "text": "type in our own regular Expressions",
        "start": 3637.24,
        "duration": 3.16
    },
    {
        "text": "would be a per which would be a perfect",
        "start": 3638.96,
        "duration": 3.44
    },
    {
        "text": "example of that all right well let me",
        "start": 3640.4,
        "duration": 4.36
    },
    {
        "text": "propose that we try to solve one other",
        "start": 3642.4,
        "duration": 5.56
    },
    {
        "text": "problem here whereby if I go into the",
        "start": 3644.76,
        "duration": 5.72
    },
    {
        "text": "same version as before which is now",
        "start": 3647.96,
        "duration": 4.599
    },
    {
        "text": "ignoring case but I type in one of my",
        "start": 3650.48,
        "duration": 3.92
    },
    {
        "text": "other email addresses let me go ahead",
        "start": 3652.559,
        "duration": 4.441
    },
    {
        "text": "and run python of validate and this time",
        "start": 3654.4,
        "duration": 4.76
    },
    {
        "text": "let me type in not maen harvard.edu",
        "start": 3657.0,
        "duration": 4.24
    },
    {
        "text": "which I use primarily but my another",
        "start": 3659.16,
        "duration": 4.28
    },
    {
        "text": "email address of mine maen cs50.h",
        "start": 3661.24,
        "duration": 4.92
    },
    {
        "text": "harvard.edu which forwards to the same",
        "start": 3663.44,
        "duration": 5.08
    },
    {
        "text": "let me go ahead and hit enter now and",
        "start": 3666.16,
        "duration": 5.48
    },
    {
        "text": "huh invalid even though I'm pretty sure",
        "start": 3668.52,
        "duration": 4.88
    },
    {
        "text": "that is in fact my email address well",
        "start": 3671.64,
        "duration": 4.32
    },
    {
        "text": "let's put our finger on the reason why",
        "start": 3673.4,
        "duration": 5.919
    },
    {
        "text": "why at the moment is mail at cs50.h",
        "start": 3675.96,
        "duration": 6.879
    },
    {
        "text": "harvard.edu being considered invalid",
        "start": 3679.319,
        "duration": 6.04
    },
    {
        "text": "even though I'm pretty sure I send and",
        "start": 3682.839,
        "duration": 6.121
    },
    {
        "text": "receive email email from that address",
        "start": 3685.359,
        "duration": 3.601
    },
    {
        "text": "too why might that be because there is a",
        "start": 3689.599,
        "duration": 9.121
    },
    {
        "text": "DOT that has come after the ad symbol",
        "start": 3693.48,
        "duration": 9.0
    },
    {
        "text": "exactly there's a DOT after my cs50 and",
        "start": 3698.72,
        "duration": 5.52
    },
    {
        "text": "I'm not expecting any dots there I'm",
        "start": 3702.48,
        "duration": 4.119
    },
    {
        "text": "expecting only again word characters",
        "start": 3704.24,
        "duration": 5.92
    },
    {
        "text": "which is a through z 0-9 and underscore",
        "start": 3706.599,
        "duration": 5.881
    },
    {
        "text": "so I'm going to have to retool here but",
        "start": 3710.16,
        "duration": 4.04
    },
    {
        "text": "how could I go about doing this well it",
        "start": 3712.48,
        "duration": 4.04
    },
    {
        "text": "turns out theoretically there could be",
        "start": 3714.2,
        "duration": 3.839
    },
    {
        "text": "other email addresses even though they'd",
        "start": 3716.52,
        "duration": 3.4
    },
    {
        "text": "be getting a little excessively long for",
        "start": 3718.039,
        "duration": 4.881
    },
    {
        "text": "instance mailin at something. cs50.h",
        "start": 3719.92,
        "duration": 4.84
    },
    {
        "text": "harvard.edu which is not technically",
        "start": 3722.92,
        "duration": 4.119
    },
    {
        "text": "exist but it could you can have of",
        "start": 3724.76,
        "duration": 4.2
    },
    {
        "text": "course multiple dots in a domain name",
        "start": 3727.039,
        "duration": 3.76
    },
    {
        "text": "like we see here wouldn't it be nice if",
        "start": 3728.96,
        "duration": 4.079
    },
    {
        "text": "we could handle that as well well let me",
        "start": 3730.799,
        "duration": 4.48
    },
    {
        "text": "propose that we modify my regular",
        "start": 3733.039,
        "duration": 4.921
    },
    {
        "text": "expression as follows it turns out that",
        "start": 3735.279,
        "duration": 5.52
    },
    {
        "text": "you can group ideas together and you can",
        "start": 3737.96,
        "duration": 5.56
    },
    {
        "text": "not only ask whether or not this pattern",
        "start": 3740.799,
        "duration": 5.721
    },
    {
        "text": "matches or this one using syntax like a",
        "start": 3743.52,
        "duration": 6.319
    },
    {
        "text": "vertical Bar B which means either A or B",
        "start": 3746.52,
        "duration": 5.68
    },
    {
        "text": "you can also group things together and",
        "start": 3749.839,
        "duration": 4.44
    },
    {
        "text": "then apply some other operator to them",
        "start": 3752.2,
        "duration": 4.2
    },
    {
        "text": "as well in fact let me go back to VSS",
        "start": 3754.279,
        "duration": 4.201
    },
    {
        "text": "code here and let me propose that if I",
        "start": 3756.4,
        "duration": 5.639
    },
    {
        "text": "want to tolerate a subdomain like cs50",
        "start": 3758.48,
        "duration": 6.559
    },
    {
        "text": "that may or may not be there let me go",
        "start": 3762.039,
        "duration": 5.121
    },
    {
        "text": "ahead and change it as follows I could",
        "start": 3765.039,
        "duration": 4.08
    },
    {
        "text": "naively do this if I want to support",
        "start": 3767.16,
        "duration": 4.399
    },
    {
        "text": "subdomains I could say well let's allow",
        "start": 3769.119,
        "duration": 5.401
    },
    {
        "text": "for otherw characters plus and then a",
        "start": 3771.559,
        "duration": 4.921
    },
    {
        "text": "literal Dot and and notice I'll",
        "start": 3774.52,
        "duration": 4.0
    },
    {
        "text": "highlight in blue here what I've just",
        "start": 3776.48,
        "duration": 4.119
    },
    {
        "text": "added everything else is the same but",
        "start": 3778.52,
        "duration": 5.039
    },
    {
        "text": "I'm now adding room for another sequence",
        "start": 3780.599,
        "duration": 5.52
    },
    {
        "text": "of one or more word characters and then",
        "start": 3783.559,
        "duration": 7.0
    },
    {
        "text": "a literal dot so this now I think if I",
        "start": 3786.119,
        "duration": 6.841
    },
    {
        "text": "rerun python of validate will work for",
        "start": 3790.559,
        "duration": 6.121
    },
    {
        "text": "maen cs50.h harvard.edu enter",
        "start": 3792.96,
        "duration": 5.76
    },
    {
        "text": "unfortunately does anyone see where this",
        "start": 3796.68,
        "duration": 4.639
    },
    {
        "text": "is going let me rerun python of validate",
        "start": 3798.72,
        "duration": 4.8
    },
    {
        "text": "dopy and type in as I keep doing maen at",
        "start": 3801.319,
        "duration": 4.081
    },
    {
        "text": "harvard.edu which up until now has kept",
        "start": 3803.52,
        "duration": 4.88
    },
    {
        "text": "working despite all of my changes but",
        "start": 3805.4,
        "duration": 6.879
    },
    {
        "text": "now finally I've broken my own email",
        "start": 3808.4,
        "duration": 6.8
    },
    {
        "text": "address so logically what's the solution",
        "start": 3812.279,
        "duration": 4.481
    },
    {
        "text": "here well there's a bunch of ways we",
        "start": 3815.2,
        "duration": 3.32
    },
    {
        "text": "could solve this I could maybe start",
        "start": 3816.76,
        "duration": 3.76
    },
    {
        "text": "using two regular expressions and",
        "start": 3818.52,
        "duration": 4.279
    },
    {
        "text": "support you uh email addresses of the",
        "start": 3820.52,
        "duration": 7.279
    },
    {
        "text": "form username at domain. TLD or username",
        "start": 3822.799,
        "duration": 8.401
    },
    {
        "text": "at subdomain dod. TLD where TLD just",
        "start": 3827.799,
        "duration": 6.24
    },
    {
        "text": "means top level domain like edu or I",
        "start": 3831.2,
        "duration": 4.76
    },
    {
        "text": "could maybe just modify this one cuz I'd",
        "start": 3834.039,
        "duration": 4.481
    },
    {
        "text": "prefer not to have like two uh regular",
        "start": 3835.96,
        "duration": 5.04
    },
    {
        "text": "expressions or one that's twice as big",
        "start": 3838.52,
        "duration": 5.24
    },
    {
        "text": "why don't I just specify to re. search",
        "start": 3841.0,
        "duration": 5.76
    },
    {
        "text": "that part of this pattern is optional",
        "start": 3843.76,
        "duration": 6.039
    },
    {
        "text": "what was the symbol we saw earlier that",
        "start": 3846.76,
        "duration": 5.079
    },
    {
        "text": "allows you to specify that the thing",
        "start": 3849.799,
        "duration": 5.641
    },
    {
        "text": "before it is technically optional the",
        "start": 3851.839,
        "duration": 5.801
    },
    {
        "text": "straight bar we are using the Straight",
        "start": 3855.44,
        "duration": 3.359
    },
    {
        "text": "bar as",
        "start": 3857.64,
        "duration": 4.199
    },
    {
        "text": "a optional make the opt the argument",
        "start": 3858.799,
        "duration": 5.361
    },
    {
        "text": "optional so we could we could use a",
        "start": 3861.839,
        "duration": 4.801
    },
    {
        "text": "vertical bar and some parth es and say",
        "start": 3864.16,
        "duration": 4.76
    },
    {
        "text": "either there's something here or there's",
        "start": 3866.64,
        "duration": 4.36
    },
    {
        "text": "nothing we could do that in parentheses",
        "start": 3868.92,
        "duration": 3.6
    },
    {
        "text": "but I think there's actually an even",
        "start": 3871.0,
        "duration": 4.48
    },
    {
        "text": "easier way uh actually is a question",
        "start": 3872.52,
        "duration": 6.0
    },
    {
        "text": "mark indeed question mark think back to",
        "start": 3875.48,
        "duration": 5.119
    },
    {
        "text": "this summary here of our first set of",
        "start": 3878.52,
        "duration": 5.0
    },
    {
        "text": "symbols whereby we had not just Dot and",
        "start": 3880.599,
        "duration": 5.281
    },
    {
        "text": "star and plus but also a question mark",
        "start": 3883.52,
        "duration": 4.839
    },
    {
        "text": "which means literally zero or one",
        "start": 3885.88,
        "duration": 4.36
    },
    {
        "text": "repetitions which effectively means",
        "start": 3888.359,
        "duration": 4.841
    },
    {
        "text": "optional it's either there one or it's",
        "start": 3890.24,
        "duration": 6.28
    },
    {
        "text": "not zero now how can I translate to that",
        "start": 3893.2,
        "duration": 5.44
    },
    {
        "text": "to this code here well let me go ahead",
        "start": 3896.52,
        "duration": 5.12
    },
    {
        "text": "and Surround this part of my pattern",
        "start": 3898.64,
        "duration": 5.399
    },
    {
        "text": "with parentheses which doesn't mean I",
        "start": 3901.64,
        "duration": 4.28
    },
    {
        "text": "want literally a parenthesis in the",
        "start": 3904.039,
        "duration": 4.121
    },
    {
        "text": "user's input I just want to group these",
        "start": 3905.92,
        "duration": 4.679
    },
    {
        "text": "characters together and in fact this now",
        "start": 3908.16,
        "duration": 4.199
    },
    {
        "text": "will still work I've only added",
        "start": 3910.599,
        "duration": 3.52
    },
    {
        "text": "parentheses around the new part for the",
        "start": 3912.359,
        "duration": 3.96
    },
    {
        "text": "subdomain let me run python of validate",
        "start": 3914.119,
        "duration": 5.321
    },
    {
        "text": "dopy let me run ma cs50.h harvard.edu",
        "start": 3916.319,
        "duration": 5.921
    },
    {
        "text": "enter that's still valid but to be clear",
        "start": 3919.44,
        "duration": 5.28
    },
    {
        "text": "if I rerun it again for maen harvard.edu",
        "start": 3922.24,
        "duration": 6.559
    },
    {
        "text": "that is still invalid but not if I go in",
        "start": 3924.72,
        "duration": 6.599
    },
    {
        "text": "here and say after the parentheses which",
        "start": 3928.799,
        "duration": 5.641
    },
    {
        "text": "now is one logical unit it's one big",
        "start": 3931.319,
        "duration": 6.121
    },
    {
        "text": "group of ideas together I add a single",
        "start": 3934.44,
        "duration": 6.04
    },
    {
        "text": "question mark there this will now tell",
        "start": 3937.44,
        "duration": 5.56
    },
    {
        "text": "re. search that that whole thing in",
        "start": 3940.48,
        "duration": 5.76
    },
    {
        "text": "parentheses can either be there once or",
        "start": 3943.0,
        "duration": 6.44
    },
    {
        "text": "be there not at all zero times so what",
        "start": 3946.24,
        "duration": 5.319
    },
    {
        "text": "does this translate into when I run it",
        "start": 3949.44,
        "duration": 4.04
    },
    {
        "text": "well let me go ahead and rerun it with",
        "start": 3951.559,
        "duration": 5.161
    },
    {
        "text": "Ma at cs50.h harvard. you so that the",
        "start": 3953.48,
        "duration": 6.28
    },
    {
        "text": "subdomain is there that works as before",
        "start": 3956.72,
        "duration": 4.72
    },
    {
        "text": "let me clear my screen and run it again",
        "start": 3959.76,
        "duration": 4.64
    },
    {
        "text": "python validate with Ma at harvard.edu",
        "start": 3961.44,
        "duration": 5.639
    },
    {
        "text": "which used to work then broke is are we",
        "start": 3964.4,
        "duration": 5.76
    },
    {
        "text": "back in business now we are that's now",
        "start": 3967.079,
        "duration": 6.28
    },
    {
        "text": "valid again questions now on this",
        "start": 3970.16,
        "duration": 5.639
    },
    {
        "text": "approach where we've use not just the",
        "start": 3973.359,
        "duration": 4.841
    },
    {
        "text": "question mark But the parentheses as",
        "start": 3975.799,
        "duration": 4.48
    },
    {
        "text": "well okay yeah you said he works for",
        "start": 3978.2,
        "duration": 5.079
    },
    {
        "text": "zero or one repetition what if you have",
        "start": 3980.279,
        "duration": 5.921
    },
    {
        "text": "more what if you have more that's okay",
        "start": 3983.279,
        "duration": 6.241
    },
    {
        "text": "that's where you could do star star is",
        "start": 3986.2,
        "duration": 5.72
    },
    {
        "text": "zero or more which gives you all the",
        "start": 3989.52,
        "duration": 5.599
    },
    {
        "text": "flexibility in the world yeah so I was",
        "start": 3991.92,
        "duration": 5.76
    },
    {
        "text": "just asking that uh uh with question",
        "start": 3995.119,
        "duration": 5.601
    },
    {
        "text": "mark there's only one repetition allow",
        "start": 3997.68,
        "duration": 5.28
    },
    {
        "text": "it means zero or one repetition so it's",
        "start": 4000.72,
        "duration": 5.599
    },
    {
        "text": "either not there or it is there and so",
        "start": 4002.96,
        "duration": 5.319
    },
    {
        "text": "that's why this pattern now if I go back",
        "start": 4006.319,
        "duration": 3.641
    },
    {
        "text": "to my code even though again it",
        "start": 4008.279,
        "duration": 3.721
    },
    {
        "text": "admittedly looks cryptic let me",
        "start": 4009.96,
        "duration": 4.56
    },
    {
        "text": "highlight everything after the at sign",
        "start": 4012.0,
        "duration": 5.079
    },
    {
        "text": "and before the dollar sign sign this now",
        "start": 4014.52,
        "duration": 4.88
    },
    {
        "text": "represents a domain name like",
        "start": 4017.079,
        "duration": 5.96
    },
    {
        "text": "harvard.edu or a subdomain within the",
        "start": 4019.4,
        "duration": 6.32
    },
    {
        "text": "domain name why well this part to the",
        "start": 4023.039,
        "duration": 5.721
    },
    {
        "text": "right is the same as always backw plus",
        "start": 4025.72,
        "duration": 5.92
    },
    {
        "text": "means something like Harvard or Yale",
        "start": 4028.76,
        "duration": 6.48
    },
    {
        "text": "back.edu means literally doedu so the",
        "start": 4031.64,
        "duration": 6.24
    },
    {
        "text": "new part is this in parentheses I have",
        "start": 4035.24,
        "duration": 7.119
    },
    {
        "text": "another set of backw plus back SL do now",
        "start": 4037.88,
        "duration": 6.88
    },
    {
        "text": "but it's all in parentheses I'm now",
        "start": 4042.359,
        "duration": 4.281
    },
    {
        "text": "having any question mark right after",
        "start": 4044.76,
        "duration": 3.44
    },
    {
        "text": "that which means that whole thing in",
        "start": 4046.64,
        "duration": 4.52
    },
    {
        "text": "parentheses either can be there or it",
        "start": 4048.2,
        "duration": 4.72
    },
    {
        "text": "can't be there it's either of those that",
        "start": 4051.16,
        "duration": 4.48
    },
    {
        "text": "are acceptable so a question mark",
        "start": 4052.92,
        "duration": 5.24
    },
    {
        "text": "effectively makes something optional it",
        "start": 4055.64,
        "duration": 4.24
    },
    {
        "text": "would not be correct to remove the",
        "start": 4058.16,
        "duration": 3.919
    },
    {
        "text": "parentheses because what would this mean",
        "start": 4059.88,
        "duration": 4.479
    },
    {
        "text": "if I remove the parentheses that would",
        "start": 4062.079,
        "duration": 5.401
    },
    {
        "text": "mean that only this dot is optional",
        "start": 4064.359,
        "duration": 4.48
    },
    {
        "text": "which isn't really what we want to",
        "start": 4067.48,
        "duration": 5.16
    },
    {
        "text": "express I want the subdomain like cs50",
        "start": 4068.839,
        "duration": 5.921
    },
    {
        "text": "and the additional dot to be what's",
        "start": 4072.64,
        "duration": 3.919
    },
    {
        "text": "there or not there there how about one",
        "start": 4074.76,
        "duration": 4.88
    },
    {
        "text": "other question on rexus here can they",
        "start": 4076.559,
        "duration": 6.04
    },
    {
        "text": "use this for the usernames absolutely we",
        "start": 4079.64,
        "duration": 4.399
    },
    {
        "text": "still have other problems right we're",
        "start": 4082.599,
        "duration": 3.081
    },
    {
        "text": "not solving all of the problems today",
        "start": 4084.039,
        "duration": 4.28
    },
    {
        "text": "just yet but absolutely right now we are",
        "start": 4085.68,
        "duration": 5.0
    },
    {
        "text": "not letting you have a period in your",
        "start": 4088.319,
        "duration": 3.96
    },
    {
        "text": "username and again some of you with",
        "start": 4090.68,
        "duration": 3.599
    },
    {
        "text": "Gmail accounts or other accounts you",
        "start": 4092.279,
        "duration": 3.441
    },
    {
        "text": "probably have not just underscores",
        "start": 4094.279,
        "duration": 2.56
    },
    {
        "text": "numbers and letters you might have",
        "start": 4095.72,
        "duration": 4.079
    },
    {
        "text": "periods too well we could fix that not",
        "start": 4096.839,
        "duration": 5.241
    },
    {
        "text": "using question mark here per se but now",
        "start": 4099.799,
        "duration": 4.0
    },
    {
        "text": "that we have these parentheses at our",
        "start": 4102.08,
        "duration": 4.84
    },
    {
        "text": "disposal what I could do is this I could",
        "start": 4103.799,
        "duration": 6.56
    },
    {
        "text": "use parentheses to surround the back slw",
        "start": 4106.92,
        "duration": 5.16
    },
    {
        "text": "to say any word character which is the",
        "start": 4110.359,
        "duration": 4.081
    },
    {
        "text": "same thing again as a letter or a number",
        "start": 4112.08,
        "duration": 5.159
    },
    {
        "text": "or an underscore but I could also or in",
        "start": 4114.44,
        "duration": 6.04
    },
    {
        "text": "using a vertical bar something else like",
        "start": 4117.239,
        "duration": 6.0
    },
    {
        "text": "a literal dot now a literal dot needs to",
        "start": 4120.48,
        "duration": 4.96
    },
    {
        "text": "be escaped otherwise it represents any",
        "start": 4123.239,
        "duration": 3.881
    },
    {
        "text": "character which would be a regression a",
        "start": 4125.44,
        "duration": 4.08
    },
    {
        "text": "step back but now notice what I've done",
        "start": 4127.12,
        "duration": 5.639
    },
    {
        "text": "in parentheses I'm telling re. search",
        "start": 4129.52,
        "duration": 5.239
    },
    {
        "text": "that those first few characters in your",
        "start": 4132.759,
        "duration": 4.161
    },
    {
        "text": "email address that is your username has",
        "start": 4134.759,
        "duration": 5.361
    },
    {
        "text": "to be a word character Like A through Z",
        "start": 4136.92,
        "duration": 5.56
    },
    {
        "text": "uppercase or lowercase or 0 through 9 or",
        "start": 4140.12,
        "duration": 5.599
    },
    {
        "text": "an underscore or a literal dot we could",
        "start": 4142.48,
        "duration": 5.04
    },
    {
        "text": "do this differently too I could get rid",
        "start": 4145.719,
        "duration": 4.361
    },
    {
        "text": "of the parentheses and the or and I",
        "start": 4147.52,
        "duration": 4.56
    },
    {
        "text": "could just use a set of characters I",
        "start": 4150.08,
        "duration": 5.119
    },
    {
        "text": "could again manually say a through z a",
        "start": 4152.08,
        "duration": 7.079
    },
    {
        "text": "through z 0 through 9 underscore and",
        "start": 4155.199,
        "duration": 5.921
    },
    {
        "text": "then I could do a literal dot with a",
        "start": 4159.159,
        "duration": 4.56
    },
    {
        "text": "back slash period and now I technically",
        "start": 4161.12,
        "duration": 4.039
    },
    {
        "text": "don't even need the uppercase because",
        "start": 4163.719,
        "duration": 2.921
    },
    {
        "text": "I'm already telling the computer to",
        "start": 4165.159,
        "duration": 3.52
    },
    {
        "text": "ignore case I can just pick one or the",
        "start": 4166.64,
        "duration": 4.119
    },
    {
        "text": "other which one is better is really up",
        "start": 4168.679,
        "duration": 3.48
    },
    {
        "text": "to you whichever one you think is more",
        "start": 4170.759,
        "duration": 3.92
    },
    {
        "text": "readable would generally be the better",
        "start": 4172.159,
        "duration": 5.361
    },
    {
        "text": "design all right let me propose that I",
        "start": 4174.679,
        "duration": 6.321
    },
    {
        "text": "rewind this in time to where we left off",
        "start": 4177.52,
        "duration": 6.52
    },
    {
        "text": "which was here and let me propose that",
        "start": 4181.0,
        "duration": 5.0
    },
    {
        "text": "there are indeed still limitations of",
        "start": 4184.04,
        "duration": 4.52
    },
    {
        "text": "this solution not just with the username",
        "start": 4186.0,
        "duration": 3.92
    },
    {
        "text": "not just with the domain name we're",
        "start": 4188.56,
        "duration": 3.52
    },
    {
        "text": "still being a little too restrictive so",
        "start": 4189.92,
        "duration": 4.0
    },
    {
        "text": "would you like to see the official",
        "start": 4192.08,
        "duration": 3.32
    },
    {
        "text": "regular expression that at least",
        "start": 4193.92,
        "duration": 3.84
    },
    {
        "text": "browsers use nowadays whenever you type",
        "start": 4195.4,
        "duration": 4.24
    },
    {
        "text": "in an email address to a web form and",
        "start": 4197.76,
        "duration": 4.479
    },
    {
        "text": "the web form the browser tells you yes",
        "start": 4199.64,
        "duration": 4.24
    },
    {
        "text": "or no your email address is",
        "start": 4202.239,
        "duration": 6.48
    },
    {
        "text": "syntactically valid ready ready here is",
        "start": 4203.88,
        "duration": 7.839
    },
    {
        "text": "and this isn't even officially the right",
        "start": 4208.719,
        "duration": 5.121
    },
    {
        "text": "regular expression it's a simplified",
        "start": 4211.719,
        "duration": 3.921
    },
    {
        "text": "version that browsers use because it",
        "start": 4213.84,
        "duration": 4.44
    },
    {
        "text": "catches most mistakes but not all here",
        "start": 4215.64,
        "duration": 6.44
    },
    {
        "text": "we go this is the regular expression for",
        "start": 4218.28,
        "duration": 6.48
    },
    {
        "text": "a valid email address at least as",
        "start": 4222.08,
        "duration": 5.84
    },
    {
        "text": "browsers nowadays Implement them now",
        "start": 4224.76,
        "duration": 6.24
    },
    {
        "text": "it's crazy cryptic at first glance but",
        "start": 4227.92,
        "duration": 5.2
    },
    {
        "text": "not and it's wrapping onto many lines",
        "start": 4231.0,
        "duration": 4.48
    },
    {
        "text": "but it's just one pattern but just",
        "start": 4233.12,
        "duration": 5.32
    },
    {
        "text": "notice the now familiar symbols there is",
        "start": 4235.48,
        "duration": 5.32
    },
    {
        "text": "the carrot symbol at the very top there",
        "start": 4238.44,
        "duration": 5.0
    },
    {
        "text": "is the dollar sign at the very end there",
        "start": 4240.8,
        "duration": 4.64
    },
    {
        "text": "is a square bracket over here and then",
        "start": 4243.44,
        "duration": 3.84
    },
    {
        "text": "some of these ranges plus other",
        "start": 4245.44,
        "duration": 3.84
    },
    {
        "text": "characters turns out you don't normally",
        "start": 4247.28,
        "duration": 3.879
    },
    {
        "text": "see these characters in email addresses",
        "start": 4249.28,
        "duration": 3.399
    },
    {
        "text": "it looks like you're swearing at someone",
        "start": 4251.159,
        "duration": 3.601
    },
    {
        "text": "in their username but they're valid",
        "start": 4252.679,
        "duration": 4.081
    },
    {
        "text": "characters they're valid officially that",
        "start": 4254.76,
        "duration": 3.479
    },
    {
        "text": "doesn't mean that Gmail is going to",
        "start": 4256.76,
        "duration": 4.0
    },
    {
        "text": "allow you to put dollar signs and other",
        "start": 4258.239,
        "duration": 4.241
    },
    {
        "text": "punctuation in your username but",
        "start": 4260.76,
        "duration": 4.08
    },
    {
        "text": "officially some servers might allow that",
        "start": 4262.48,
        "duration": 4.36
    },
    {
        "text": "so if you really want to validate a",
        "start": 4264.84,
        "duration": 4.16
    },
    {
        "text": "user's email address you would actually",
        "start": 4266.84,
        "duration": 4.56
    },
    {
        "text": "come up with or copy paste something",
        "start": 4269.0,
        "duration": 5.0
    },
    {
        "text": "like this but honestly this looks so",
        "start": 4271.4,
        "duration": 4.4
    },
    {
        "text": "cryptic and if you were to type it out",
        "start": 4274.0,
        "duration": 3.96
    },
    {
        "text": "manually you are so likely to make a",
        "start": 4275.8,
        "duration": 4.399
    },
    {
        "text": "mistake what's the better solution here",
        "start": 4277.96,
        "duration": 5.239
    },
    {
        "text": "instead this is where P past week's",
        "start": 4280.199,
        "duration": 5.641
    },
    {
        "text": "libraries are your friend sure someone",
        "start": 4283.199,
        "duration": 5.121
    },
    {
        "text": "else on the internet a programmer more",
        "start": 4285.84,
        "duration": 4.839
    },
    {
        "text": "experienced than you even has come up",
        "start": 4288.32,
        "duration": 5.12
    },
    {
        "text": "with code that validates email addresses",
        "start": 4290.679,
        "duration": 4.681
    },
    {
        "text": "properly using this regular expression",
        "start": 4293.44,
        "duration": 3.52
    },
    {
        "text": "or even something more sophisticated",
        "start": 4295.36,
        "duration": 3.52
    },
    {
        "text": "than that so generally if the problem at",
        "start": 4296.96,
        "duration": 4.4
    },
    {
        "text": "hand is to validate input that is pretty",
        "start": 4298.88,
        "duration": 4.96
    },
    {
        "text": "conventional an email address a URL",
        "start": 4301.36,
        "duration": 3.839
    },
    {
        "text": "something where there's an official",
        "start": 4303.84,
        "duration": 3.799
    },
    {
        "text": "definition that's independent of you",
        "start": 4305.199,
        "duration": 5.241
    },
    {
        "text": "yourself find a popular library that",
        "start": 4307.639,
        "duration": 5.281
    },
    {
        "text": "you're comfortable using and use it in",
        "start": 4310.44,
        "duration": 4.56
    },
    {
        "text": "your code to validate email addresses",
        "start": 4312.92,
        "duration": 4.64
    },
    {
        "text": "this is not a wheel necessarily that you",
        "start": 4315.0,
        "duration": 4.719
    },
    {
        "text": "yourself should invent we've used email",
        "start": 4317.56,
        "duration": 4.2
    },
    {
        "text": "addresses though to iteratively start",
        "start": 4319.719,
        "duration": 4.081
    },
    {
        "text": "from something simple too simple and",
        "start": 4321.76,
        "duration": 3.919
    },
    {
        "text": "build on top of that so you could",
        "start": 4323.8,
        "duration": 3.399
    },
    {
        "text": "certainly imagine using regular",
        "start": 4325.679,
        "duration": 2.921
    },
    {
        "text": "Expressions still to validate things",
        "start": 4327.199,
        "duration": 3.52
    },
    {
        "text": "that aren't email addresses but are data",
        "start": 4328.6,
        "duration": 4.599
    },
    {
        "text": "that are important to you so we at least",
        "start": 4330.719,
        "duration": 4.721
    },
    {
        "text": "now have these building blocks now",
        "start": 4333.199,
        "duration": 3.801
    },
    {
        "text": "besides the regular Expressions",
        "start": 4335.44,
        "duration": 2.96
    },
    {
        "text": "themselves it turns out there's other",
        "start": 4337.0,
        "duration": 3.88
    },
    {
        "text": "functions in Python's re library for",
        "start": 4338.4,
        "duration": 4.36
    },
    {
        "text": "regular Expressions among them is this",
        "start": 4340.88,
        "duration": 3.68
    },
    {
        "text": "function here re. match which is",
        "start": 4342.76,
        "duration": 4.28
    },
    {
        "text": "actually very similar to re. search",
        "start": 4344.56,
        "duration": 4.24
    },
    {
        "text": "except you don't have to specify the",
        "start": 4347.04,
        "duration": 3.32
    },
    {
        "text": "carrot symbol at the very beginning of",
        "start": 4348.8,
        "duration": 3.28
    },
    {
        "text": "your Rex if you want to match from the",
        "start": 4350.36,
        "duration": 4.6
    },
    {
        "text": "start of a string re. match by Design",
        "start": 4352.08,
        "duration": 4.96
    },
    {
        "text": "will automatically start matching from",
        "start": 4354.96,
        "duration": 3.96
    },
    {
        "text": "the start of the string for you similar",
        "start": 4357.04,
        "duration": 4.28
    },
    {
        "text": "in spirit is re. full match which does",
        "start": 4358.92,
        "duration": 4.12
    },
    {
        "text": "the same thing but not only matches at",
        "start": 4361.32,
        "duration": 3.2
    },
    {
        "text": "the start of the string but the end of",
        "start": 4363.04,
        "duration": 3.32
    },
    {
        "text": "the string so that you too don't need to",
        "start": 4364.52,
        "duration": 4.24
    },
    {
        "text": "type in the carrot symbol or the dollar",
        "start": 4366.36,
        "duration": 4.64
    },
    {
        "text": "sign as well but let's go ahead and",
        "start": 4368.76,
        "duration": 4.32
    },
    {
        "text": "transition back now to some actual code",
        "start": 4371.0,
        "duration": 3.76
    },
    {
        "text": "whereby we solve a different problem in",
        "start": 4373.08,
        "duration": 3.88
    },
    {
        "text": "spirit rather than just validate the",
        "start": 4374.76,
        "duration": 4.04
    },
    {
        "text": "user's input and make sure it looks the",
        "start": 4376.96,
        "duration": 3.84
    },
    {
        "text": "way we want let's just assume that the",
        "start": 4378.8,
        "duration": 3.879
    },
    {
        "text": "users are not going to type in data",
        "start": 4380.8,
        "duration": 3.839
    },
    {
        "text": "exactly as we want and so we're going to",
        "start": 4382.679,
        "duration": 3.801
    },
    {
        "text": "have to clean up their input this",
        "start": 4384.639,
        "duration": 3.641
    },
    {
        "text": "happens so often when you're using like",
        "start": 4386.48,
        "duration": 4.28
    },
    {
        "text": "a Google form or Office 365 form or",
        "start": 4388.28,
        "duration": 4.72
    },
    {
        "text": "anything else to collect user input no",
        "start": 4390.76,
        "duration": 4.56
    },
    {
        "text": "matter what your form question says your",
        "start": 4393.0,
        "duration": 4.12
    },
    {
        "text": "users are not necessarily going to",
        "start": 4395.32,
        "duration": 3.48
    },
    {
        "text": "follow those directions they might go",
        "start": 4397.12,
        "duration": 3.079
    },
    {
        "text": "ahead and type in something that's a",
        "start": 4398.8,
        "duration": 3.32
    },
    {
        "text": "little differently formatted than you",
        "start": 4400.199,
        "duration": 3.921
    },
    {
        "text": "might like now you could certainly go",
        "start": 4402.12,
        "duration": 4.64
    },
    {
        "text": "through the results and download a CSV",
        "start": 4404.12,
        "duration": 4.36
    },
    {
        "text": "or open the Google spreadsheet or",
        "start": 4406.76,
        "duration": 3.76
    },
    {
        "text": "equivalent in Excel and just clean up",
        "start": 4408.48,
        "duration": 4.12
    },
    {
        "text": "all the data manually but if you've got",
        "start": 4410.52,
        "duration": 4.199
    },
    {
        "text": "lots of submissions dozens hundreds",
        "start": 4412.6,
        "duration": 4.76
    },
    {
        "text": "thousands of rows in your data set doing",
        "start": 4414.719,
        "duration": 4.48
    },
    {
        "text": "things manually might not be very fun it",
        "start": 4417.36,
        "duration": 3.56
    },
    {
        "text": "might be much more effective to write",
        "start": 4419.199,
        "duration": 4.52
    },
    {
        "text": "code as in Python that can allow you to",
        "start": 4420.92,
        "duration": 5.44
    },
    {
        "text": "clean up that data and any future data",
        "start": 4423.719,
        "duration": 5.841
    },
    {
        "text": "as well so let me propose that we go",
        "start": 4426.36,
        "duration": 5.359
    },
    {
        "text": "ahead here and close validate dopy and",
        "start": 4429.56,
        "duration": 3.88
    },
    {
        "text": "let's go ahead and create a new program",
        "start": 4431.719,
        "duration": 4.041
    },
    {
        "text": "alog together called format. Pi the goal",
        "start": 4433.44,
        "duration": 4.68
    },
    {
        "text": "of which is to reformat the user's input",
        "start": 4435.76,
        "duration": 4.64
    },
    {
        "text": "in the format we expect I'm going to go",
        "start": 4438.12,
        "duration": 5.28
    },
    {
        "text": "ahead and run code of format. piy and",
        "start": 4440.4,
        "duration": 4.759
    },
    {
        "text": "let's suppose that the data we're going",
        "start": 4443.4,
        "duration": 4.56
    },
    {
        "text": "to reformat is the user's name so not",
        "start": 4445.159,
        "duration": 5.04
    },
    {
        "text": "email address but name this time and",
        "start": 4447.96,
        "duration": 3.48
    },
    {
        "text": "we're going to hope that they type in",
        "start": 4450.199,
        "duration": 4.52
    },
    {
        "text": "their name properly like David ma but",
        "start": 4451.44,
        "duration": 4.799
    },
    {
        "text": "some users might be in the habit for",
        "start": 4454.719,
        "duration": 3.161
    },
    {
        "text": "whatever reason of typing their name",
        "start": 4456.239,
        "duration": 3.681
    },
    {
        "text": "backwards if you will with a comma such",
        "start": 4457.88,
        "duration": 6.72
    },
    {
        "text": "as ma comma David instead now it's fine",
        "start": 4459.92,
        "duration": 6.6
    },
    {
        "text": "because both both are clearly as",
        "start": 4464.6,
        "duration": 3.8
    },
    {
        "text": "readable to the human but if you want to",
        "start": 4466.52,
        "duration": 4.0
    },
    {
        "text": "standardize how those names are stored",
        "start": 4468.4,
        "duration": 4.56
    },
    {
        "text": "in your system perhaps a database or CSV",
        "start": 4470.52,
        "duration": 4.24
    },
    {
        "text": "file or something else it would be nice",
        "start": 4472.96,
        "duration": 3.96
    },
    {
        "text": "to at least standardize or canonicalize",
        "start": 4474.76,
        "duration": 3.8
    },
    {
        "text": "the format in which you're storing your",
        "start": 4476.92,
        "duration": 3.759
    },
    {
        "text": "data so that if you print out the user's",
        "start": 4478.56,
        "duration": 4.119
    },
    {
        "text": "name it's always the same format David",
        "start": 4480.679,
        "duration": 4.761
    },
    {
        "text": "men and there's no commas or backwards",
        "start": 4482.679,
        "duration": 5.401
    },
    {
        "text": "to it so let's go ahead and do something",
        "start": 4485.44,
        "duration": 4.04
    },
    {
        "text": "familiar let's go ahead and give myself",
        "start": 4488.08,
        "duration": 3.599
    },
    {
        "text": "a variable called name and set it equal",
        "start": 4489.48,
        "duration": 3.96
    },
    {
        "text": "to the return value of input asking the",
        "start": 4491.679,
        "duration": 3.96
    },
    {
        "text": "user as we've done many times what's",
        "start": 4493.44,
        "duration": 4.12
    },
    {
        "text": "your name question mark I'm going to go",
        "start": 4495.639,
        "duration": 3.721
    },
    {
        "text": "ahead and proactively at least clean up",
        "start": 4497.56,
        "duration": 4.119
    },
    {
        "text": "some messiness as we keep doing here by",
        "start": 4499.36,
        "duration": 3.72
    },
    {
        "text": "just stripping off any leading or",
        "start": 4501.679,
        "duration": 2.881
    },
    {
        "text": "trailing whites space just in case the",
        "start": 4503.08,
        "duration": 3.559
    },
    {
        "text": "user accidentally hits the space bar we",
        "start": 4504.56,
        "duration": 4.44
    },
    {
        "text": "don't want that ultimately in our data",
        "start": 4506.639,
        "duration": 4.721
    },
    {
        "text": "set and now let me go ahead and do this",
        "start": 4509.0,
        "duration": 3.76
    },
    {
        "text": "as we've done before let me just go",
        "start": 4511.36,
        "duration": 3.24
    },
    {
        "text": "ahead quickly and print out just to make",
        "start": 4512.76,
        "duration": 4.28
    },
    {
        "text": "sure I'm off to the right start hello",
        "start": 4514.6,
        "duration": 4.559
    },
    {
        "text": "and then in curly braces name so making",
        "start": 4517.04,
        "duration": 5.159
    },
    {
        "text": "an F string to format hello comma name",
        "start": 4519.159,
        "duration": 4.401
    },
    {
        "text": "now let me go ahead and clear my screen",
        "start": 4522.199,
        "duration": 3.921
    },
    {
        "text": "and run python a format up Pi let me",
        "start": 4523.56,
        "duration": 4.36
    },
    {
        "text": "behave and type in my name as I normally",
        "start": 4526.12,
        "duration": 4.519
    },
    {
        "text": "would David space ma enter and I think",
        "start": 4527.92,
        "duration": 4.88
    },
    {
        "text": "the output looks pretty good it looks as",
        "start": 4530.639,
        "duration": 4.52
    },
    {
        "text": "expected grammatically let me now go",
        "start": 4532.8,
        "duration": 4.72
    },
    {
        "text": "ahead though and play this game again",
        "start": 4535.159,
        "duration": 3.601
    },
    {
        "text": "but this time maybe because I'm not",
        "start": 4537.52,
        "duration": 2.52
    },
    {
        "text": "thinking or I'm just in the habit of",
        "start": 4538.76,
        "duration": 3.879
    },
    {
        "text": "doing last name comma first I do mein",
        "start": 4540.04,
        "duration": 5.4
    },
    {
        "text": "comma David and hit enter all right well",
        "start": 4542.639,
        "duration": 5.241
    },
    {
        "text": "this now is is weird even though the",
        "start": 4545.44,
        "duration": 4.239
    },
    {
        "text": "program is just spitting out exactly",
        "start": 4547.88,
        "duration": 4.319
    },
    {
        "text": "what I typed in arguably this is not",
        "start": 4549.679,
        "duration": 4.241
    },
    {
        "text": "close to correct at least grammatically",
        "start": 4552.199,
        "duration": 4.921
    },
    {
        "text": "it should really say hello David ma now",
        "start": 4553.92,
        "duration": 4.759
    },
    {
        "text": "maybe I could have some if conditions",
        "start": 4557.12,
        "duration": 3.119
    },
    {
        "text": "and I could just reject the users's",
        "start": 4558.679,
        "duration": 3.641
    },
    {
        "text": "input if they type a comma or get their",
        "start": 4560.239,
        "duration": 4.121
    },
    {
        "text": "names backwards somehow but that's going",
        "start": 4562.32,
        "duration": 4.359
    },
    {
        "text": "to be uh too little too late if the user",
        "start": 4564.36,
        "duration": 4.72
    },
    {
        "text": "has already submitted a form online and",
        "start": 4566.679,
        "duration": 4.601
    },
    {
        "text": "I already have the data and now I need",
        "start": 4569.08,
        "duration": 3.84
    },
    {
        "text": "to go in and clean it up and it's not",
        "start": 4571.28,
        "duration": 3.32
    },
    {
        "text": "going to be fun to go through manually",
        "start": 4572.92,
        "duration": 3.64
    },
    {
        "text": "in Google spreadsheets or apple numbers",
        "start": 4574.6,
        "duration": 4.76
    },
    {
        "text": "or Microsoft Excel and manually fix a",
        "start": 4576.56,
        "duration": 4.52
    },
    {
        "text": "lot of people's names to get rid of the",
        "start": 4579.36,
        "duration": 3.56
    },
    {
        "text": "commas and move the first name before",
        "start": 4581.08,
        "duration": 5.0
    },
    {
        "text": "the last as is conventional in the us so",
        "start": 4582.92,
        "duration": 5.0
    },
    {
        "text": "let's do this it could be a little",
        "start": 4586.08,
        "duration": 3.76
    },
    {
        "text": "fragile but let's like let's start to",
        "start": 4587.92,
        "duration": 2.92
    },
    {
        "text": "express ourselves a little",
        "start": 4589.84,
        "duration": 3.6
    },
    {
        "text": "programmatically here and ask this if",
        "start": 4590.84,
        "duration": 6.0
    },
    {
        "text": "there is a comma in the person's name",
        "start": 4593.44,
        "duration": 5.32
    },
    {
        "text": "which is pythonic I'm just asking the",
        "start": 4596.84,
        "duration": 4.04
    },
    {
        "text": "question is this shorter string in this",
        "start": 4598.76,
        "duration": 4.04
    },
    {
        "text": "longer string then let me go ahead and",
        "start": 4600.88,
        "duration": 4.04
    },
    {
        "text": "do this let me go ahead and grab that",
        "start": 4602.8,
        "duration": 5.52
    },
    {
        "text": "name in the variable split on not just",
        "start": 4604.92,
        "duration": 6.279
    },
    {
        "text": "the comma but the space after assuming",
        "start": 4608.32,
        "duration": 4.68
    },
    {
        "text": "the human typed in a space after their",
        "start": 4611.199,
        "duration": 3.721
    },
    {
        "text": "name and let me go ahead and store the",
        "start": 4613.0,
        "duration": 4.04
    },
    {
        "text": "result of that splitting of me comma",
        "start": 4614.92,
        "duration": 4.96
    },
    {
        "text": "David into two variables let's do last",
        "start": 4617.04,
        "duration": 5.36
    },
    {
        "text": "comma first again unpacking the sequence",
        "start": 4619.88,
        "duration": 5.64
    },
    {
        "text": "of values that comes back now let me go",
        "start": 4622.4,
        "duration": 4.88
    },
    {
        "text": "ahead and reformat the name so I'm going",
        "start": 4625.52,
        "duration": 3.76
    },
    {
        "text": "to forcibly change the user's name to be",
        "start": 4627.28,
        "duration": 4.399
    },
    {
        "text": "as I expect so name is actually going to",
        "start": 4629.28,
        "duration": 6.28
    },
    {
        "text": "be this format string first name then",
        "start": 4631.679,
        "duration": 6.121
    },
    {
        "text": "last name both in curly braces but",
        "start": 4635.56,
        "duration": 4.36
    },
    {
        "text": "formatt it together with a single space",
        "start": 4637.8,
        "duration": 4.72
    },
    {
        "text": "so that I'm overriding the user's input",
        "start": 4639.92,
        "duration": 4.48
    },
    {
        "text": "and updating my name variable",
        "start": 4642.52,
        "duration": 2.84
    },
    {
        "text": "accordingly",
        "start": 4644.4,
        "duration": 2.52
    },
    {
        "text": "for the moment to be clear this program",
        "start": 4645.36,
        "duration": 3.64
    },
    {
        "text": "is interactive like the users like me",
        "start": 4646.92,
        "duration": 4.48
    },
    {
        "text": "are typing their name into the program",
        "start": 4649.0,
        "duration": 5.0
    },
    {
        "text": "but imagine the data already is in a CSV",
        "start": 4651.4,
        "duration": 4.44
    },
    {
        "text": "file it came in from some process like a",
        "start": 4654.0,
        "duration": 3.92
    },
    {
        "text": "Google form or something else online you",
        "start": 4655.84,
        "duration": 4.16
    },
    {
        "text": "could imagine writing code similar to",
        "start": 4657.92,
        "duration": 4.239
    },
    {
        "text": "this but that maybe goes and reads that",
        "start": 4660.0,
        "duration": 4.6
    },
    {
        "text": "file into memory first maybe it's a CSV",
        "start": 4662.159,
        "duration": 5.0
    },
    {
        "text": "via CSV reader or a dict reader and then",
        "start": 4664.6,
        "duration": 4.36
    },
    {
        "text": "iterating over each of those names but",
        "start": 4667.159,
        "duration": 3.121
    },
    {
        "text": "we'll keep it simple and just do one",
        "start": 4668.96,
        "duration": 3.8
    },
    {
        "text": "name at a time but now what's kind of",
        "start": 4670.28,
        "duration": 4.08
    },
    {
        "text": "interesting here is if I go back to my",
        "start": 4672.76,
        "duration": 3.24
    },
    {
        "text": "terminal window window and clear it and",
        "start": 4674.36,
        "duration": 4.4
    },
    {
        "text": "run python of format. piy and hit enter",
        "start": 4676.0,
        "duration": 4.8
    },
    {
        "text": "I'm going to type in David space ma as",
        "start": 4678.76,
        "duration": 4.64
    },
    {
        "text": "before and I think we're still good but",
        "start": 4680.8,
        "duration": 4.6
    },
    {
        "text": "I'm also going to go ahead and do this",
        "start": 4683.4,
        "duration": 5.839
    },
    {
        "text": "python of format. py maen comma David",
        "start": 4685.4,
        "duration": 5.88
    },
    {
        "text": "with a space in between crossing my",
        "start": 4689.239,
        "duration": 5.521
    },
    {
        "text": "fingers and hit enter and voila that now",
        "start": 4691.28,
        "duration": 6.56
    },
    {
        "text": "has been fixed such a simple thing to be",
        "start": 4694.76,
        "duration": 5.959
    },
    {
        "text": "sure but it is so commonly necessary to",
        "start": 4697.84,
        "duration": 5.28
    },
    {
        "text": "clean up users input here we see at",
        "start": 4700.719,
        "duration": 5.601
    },
    {
        "text": "least one way to do so pretty easily now",
        "start": 4703.12,
        "duration": 5.44
    },
    {
        "text": "to be fair there's some problems here",
        "start": 4706.32,
        "duration": 3.96
    },
    {
        "text": "and in fact can someone imagine a",
        "start": 4708.56,
        "duration": 3.84
    },
    {
        "text": "scenario in which this code really",
        "start": 4710.28,
        "duration": 4.919
    },
    {
        "text": "doesn't fix the user's input what could",
        "start": 4712.4,
        "duration": 6.319
    },
    {
        "text": "still go wrong even with this fix in my",
        "start": 4715.199,
        "duration": 6.881
    },
    {
        "text": "code any thoughts if they type their in",
        "start": 4718.719,
        "duration": 6.281
    },
    {
        "text": "their name comma and then sign them oh",
        "start": 4722.08,
        "duration": 4.68
    },
    {
        "text": "and then something else yeah so let me",
        "start": 4725.0,
        "duration": 3.92
    },
    {
        "text": "let me try this for instance um let me",
        "start": 4726.76,
        "duration": 4.84
    },
    {
        "text": "go ahead and run a program and uh I am",
        "start": 4728.92,
        "duration": 4.64
    },
    {
        "text": "the only David men that I know but",
        "start": 4731.6,
        "duration": 5.68
    },
    {
        "text": "suppose I were uh uh let's say junior",
        "start": 4733.56,
        "duration": 5.76
    },
    {
        "text": "like this and it's common in English at",
        "start": 4737.28,
        "duration": 3.56
    },
    {
        "text": "least to sometimes put a comma there you",
        "start": 4739.32,
        "duration": 2.919
    },
    {
        "text": "don't necessarily need the comma but I'm",
        "start": 4740.84,
        "duration": 3.56
    },
    {
        "text": "one of those people who uses a comma",
        "start": 4742.239,
        "duration": 4.801
    },
    {
        "text": "that's now really really broken so I've",
        "start": 4744.4,
        "duration": 5.239
    },
    {
        "text": "broken some assumption there and so that",
        "start": 4747.04,
        "duration": 4.32
    },
    {
        "text": "could certainly go wrong here what else",
        "start": 4749.639,
        "duration": 2.961
    },
    {
        "text": "well let me go ahead and run this again",
        "start": 4751.36,
        "duration": 4.44
    },
    {
        "text": "and if I did ma comma David no space",
        "start": 4752.6,
        "duration": 4.48
    },
    {
        "text": "because I'm being a little sloppy I'm",
        "start": 4755.8,
        "duration": 3.08
    },
    {
        "text": "not paying attention which is going to",
        "start": 4757.08,
        "duration": 3.32
    },
    {
        "text": "happen when you have lots of users",
        "start": 4758.88,
        "duration": 3.799
    },
    {
        "text": "ultimately well this really broke now",
        "start": 4760.4,
        "duration": 4.839
    },
    {
        "text": "notice I have a value error and actual",
        "start": 4762.679,
        "duration": 6.121
    },
    {
        "text": "exception why well because split is",
        "start": 4765.239,
        "duration": 5.241
    },
    {
        "text": "supposed to be splitting the string into",
        "start": 4768.8,
        "duration": 4.399
    },
    {
        "text": "two strings by looking for the comma and",
        "start": 4770.48,
        "duration": 4.96
    },
    {
        "text": "a space but if there is no comma in",
        "start": 4773.199,
        "duration": 4.601
    },
    {
        "text": "space it can't split it into two things",
        "start": 4775.44,
        "duration": 4.68
    },
    {
        "text": "and the fact that I have two variables",
        "start": 4777.8,
        "duration": 5.0
    },
    {
        "text": "on the left but I'm only getting back",
        "start": 4780.12,
        "duration": 5.16
    },
    {
        "text": "one thing on the right means that I",
        "start": 4782.8,
        "duration": 4.52
    },
    {
        "text": "can't do this code quite as this so it's",
        "start": 4785.28,
        "duration": 4.04
    },
    {
        "text": "fragile to be sure but wouldn't it be",
        "start": 4787.32,
        "duration": 3.76
    },
    {
        "text": "nice if we could at least improve it for",
        "start": 4789.32,
        "duration": 3.16
    },
    {
        "text": "instance we now know some regular",
        "start": 4791.08,
        "duration": 3.68
    },
    {
        "text": "expression syntax what if I at least",
        "start": 4792.48,
        "duration": 5.04
    },
    {
        "text": "wanted to make this space optional well",
        "start": 4794.76,
        "duration": 4.36
    },
    {
        "text": "I could use my new found regular",
        "start": 4797.52,
        "duration": 3.159
    },
    {
        "text": "expression syntax and put a question",
        "start": 4799.12,
        "duration": 4.599
    },
    {
        "text": "mark question mark means zero or one of",
        "start": 4800.679,
        "duration": 5.121
    },
    {
        "text": "the things to the left what's the thing",
        "start": 4803.719,
        "duration": 4.041
    },
    {
        "text": "to the left it's literally a space I",
        "start": 4805.8,
        "duration": 3.64
    },
    {
        "text": "don't even need parentheses if there's",
        "start": 4807.76,
        "duration": 4.12
    },
    {
        "text": "just one thing there so that would be",
        "start": 4809.44,
        "duration": 4.68
    },
    {
        "text": "the start of a pattern that says I must",
        "start": 4811.88,
        "duration": 4.359
    },
    {
        "text": "have a comma and then I may or may not",
        "start": 4814.12,
        "duration": 4.32
    },
    {
        "text": "have a space zero or one spaces",
        "start": 4816.239,
        "duration": 5.041
    },
    {
        "text": "thereafter unfortunately the version of",
        "start": 4818.44,
        "duration": 6.64
    },
    {
        "text": "split that's built into the stir",
        "start": 4821.28,
        "duration": 6.28
    },
    {
        "text": "variable as in this case doesn't support",
        "start": 4825.08,
        "duration": 4.079
    },
    {
        "text": "regular Expressions if we want our",
        "start": 4827.56,
        "duration": 3.28
    },
    {
        "text": "regular Expressions we need to go use",
        "start": 4829.159,
        "duration": 3.801
    },
    {
        "text": "that Library here so let me go ahead and",
        "start": 4830.84,
        "duration": 4.799
    },
    {
        "text": "do this let me go in and leave this code",
        "start": 4832.96,
        "duration": 4.8
    },
    {
        "text": "AS is but go up to the top now and",
        "start": 4835.639,
        "duration": 4.721
    },
    {
        "text": "import re to import the library for",
        "start": 4837.76,
        "duration": 5.2
    },
    {
        "text": "regular expressions and now let me go",
        "start": 4840.36,
        "duration": 4.879
    },
    {
        "text": "ahead and start changing my Approach",
        "start": 4842.96,
        "duration": 4.6
    },
    {
        "text": "here I'm going to go ahead and do this",
        "start": 4845.239,
        "duration": 3.881
    },
    {
        "text": "I'm going to use the same function",
        "start": 4847.56,
        "duration": 4.079
    },
    {
        "text": "called re. search and I'm going to",
        "start": 4849.12,
        "duration": 5.72
    },
    {
        "text": "search for a pattern that I think will",
        "start": 4851.639,
        "duration": 5.721
    },
    {
        "text": "be last comma first so let me use my",
        "start": 4854.84,
        "duration": 4.56
    },
    {
        "text": "newfound regular expression syntax and",
        "start": 4857.36,
        "duration": 4.44
    },
    {
        "text": "represent a pattern for something like",
        "start": 4859.4,
        "duration": 6.239
    },
    {
        "text": "men comma space David how can I do this",
        "start": 4861.8,
        "duration": 6.68
    },
    {
        "text": "well inside of my quotes for re. search",
        "start": 4865.639,
        "duration": 6.321
    },
    {
        "text": "I'm going to have something so plus",
        "start": 4868.48,
        "duration": 6.679
    },
    {
        "text": "sorry I'm GNA have something so plus",
        "start": 4871.96,
        "duration": 5.12
    },
    {
        "text": "then I'm G to have a comma then I'm G to",
        "start": 4875.159,
        "duration": 3.641
    },
    {
        "text": "have a space then I'm going to have",
        "start": 4877.08,
        "duration": 4.079
    },
    {
        "text": "something plus now I'm going to",
        "start": 4878.8,
        "duration": 4.64
    },
    {
        "text": "preemptively refine this a little bit I",
        "start": 4881.159,
        "duration": 3.801
    },
    {
        "text": "want this whole pattern to start",
        "start": 4883.44,
        "duration": 2.96
    },
    {
        "text": "matching at the beginning of the user's",
        "start": 4884.96,
        "duration": 3.239
    },
    {
        "text": "input so I'm going to add the carrot",
        "start": 4886.4,
        "duration": 4.16
    },
    {
        "text": "right away and I want the end of the",
        "start": 4888.199,
        "duration": 4.48
    },
    {
        "text": "user's input to be matched as well so",
        "start": 4890.56,
        "duration": 4.0
    },
    {
        "text": "that I'm literally expecting any",
        "start": 4892.679,
        "duration": 4.361
    },
    {
        "text": "character one or more times then a comma",
        "start": 4894.56,
        "duration": 4.599
    },
    {
        "text": "then a space then any other character",
        "start": 4897.04,
        "duration": 5.24
    },
    {
        "text": "one or more times and then that is it",
        "start": 4899.159,
        "duration": 5.04
    },
    {
        "text": "and I'm going to pass in the name",
        "start": 4902.28,
        "duration": 5.16
    },
    {
        "text": "variable as before now when we've used",
        "start": 4904.199,
        "duration": 7.04
    },
    {
        "text": "re. search in the past we really used it",
        "start": 4907.44,
        "duration": 6.0
    },
    {
        "text": "just to answer a question does the",
        "start": 4911.239,
        "duration": 5.241
    },
    {
        "text": "user's input match the following pattern",
        "start": 4913.44,
        "duration": 6.68
    },
    {
        "text": "or not true or false effectively but re.",
        "start": 4916.48,
        "duration": 5.64
    },
    {
        "text": "search is actually more powerful than",
        "start": 4920.12,
        "duration": 4.16
    },
    {
        "text": "that you can actually get back more",
        "start": 4922.12,
        "duration": 4.88
    },
    {
        "text": "information and you can do this you can",
        "start": 4924.28,
        "duration": 4.56
    },
    {
        "text": "specify a variable and then an",
        "start": 4927.0,
        "duration": 4.159
    },
    {
        "text": "assignment operator and get back more",
        "start": 4928.84,
        "duration": 5.04
    },
    {
        "text": "precise answers to what has been found",
        "start": 4931.159,
        "duration": 5.08
    },
    {
        "text": "when searched for but what is it you",
        "start": 4933.88,
        "duration": 4.6
    },
    {
        "text": "want to get back well it turns out",
        "start": 4936.239,
        "duration": 4.0
    },
    {
        "text": "there's this other feature of regular",
        "start": 4938.48,
        "duration": 3.88
    },
    {
        "text": "Expressions which allow you to use",
        "start": 4940.239,
        "duration": 4.521
    },
    {
        "text": "parentheses not just to group things",
        "start": 4942.36,
        "duration": 5.4
    },
    {
        "text": "together but to capture them it turns",
        "start": 4944.76,
        "duration": 5.68
    },
    {
        "text": "out when you specify parentheses in a",
        "start": 4947.76,
        "duration": 4.959
    },
    {
        "text": "regular expression unbeknownst to us up",
        "start": 4950.44,
        "duration": 4.6
    },
    {
        "text": "until now everything in the parentheses",
        "start": 4952.719,
        "duration": 5.761
    },
    {
        "text": "will be returned to you as a return",
        "start": 4955.04,
        "duration": 6.599
    },
    {
        "text": "value from the re. search function it's",
        "start": 4958.48,
        "duration": 5.88
    },
    {
        "text": "going to allow you to extract specific",
        "start": 4961.639,
        "duration": 5.161
    },
    {
        "text": "amounts of information from the user's",
        "start": 4964.36,
        "duration": 4.44
    },
    {
        "text": "own input you can reverse this process",
        "start": 4966.8,
        "duration": 4.879
    },
    {
        "text": "too by using the non-capturing version",
        "start": 4968.8,
        "duration": 4.96
    },
    {
        "text": "as well you can use parentheses and then",
        "start": 4971.679,
        "duration": 4.121
    },
    {
        "text": "literally a Mark and a colon and then",
        "start": 4973.76,
        "duration": 3.6
    },
    {
        "text": "some other stuff and that will say don't",
        "start": 4975.8,
        "duration": 3.08
    },
    {
        "text": "bother capturing this I just want to",
        "start": 4977.36,
        "duration": 3.2
    },
    {
        "text": "group things but for now we're going to",
        "start": 4978.88,
        "duration": 4.2
    },
    {
        "text": "use just the parentheses themselves so",
        "start": 4980.56,
        "duration": 3.92
    },
    {
        "text": "how am I going to do this well if I want",
        "start": 4983.08,
        "duration": 4.559
    },
    {
        "text": "to get back the user's last name and",
        "start": 4984.48,
        "duration": 5.8
    },
    {
        "text": "first name I think what I want to",
        "start": 4987.639,
        "duration": 7.681
    },
    {
        "text": "capture is the plus here and the plus",
        "start": 4990.28,
        "duration": 7.879
    },
    {
        "text": "here so I've deliberately surrounded in",
        "start": 4995.32,
        "duration": 5.399
    },
    {
        "text": "parentheses the dot plus both to the",
        "start": 4998.159,
        "duration": 4.401
    },
    {
        "text": "left and the right of the comma not",
        "start": 5000.719,
        "duration": 3.44
    },
    {
        "text": "because I'm grouping them together per",
        "start": 5002.56,
        "duration": 3.48
    },
    {
        "text": "se I'm not adding a question mark I'm",
        "start": 5004.159,
        "duration": 4.48
    },
    {
        "text": "not adding up another Plus or a star I'm",
        "start": 5006.04,
        "duration": 5.639
    },
    {
        "text": "using parentheses now for capturing",
        "start": 5008.639,
        "duration": 5.641
    },
    {
        "text": "purposes why well I'm going to do this",
        "start": 5011.679,
        "duration": 4.721
    },
    {
        "text": "next I'm going to still ask a Boolean",
        "start": 5014.28,
        "duration": 5.0
    },
    {
        "text": "question like if there are matches then",
        "start": 5016.4,
        "duration": 6.12
    },
    {
        "text": "do this so if matches is not effectively",
        "start": 5019.28,
        "duration": 7.439
    },
    {
        "text": "false like none I do expect I've gotten",
        "start": 5022.52,
        "duration": 6.04
    },
    {
        "text": "back some matches and watch what I can",
        "start": 5026.719,
        "duration": 6.281
    },
    {
        "text": "do now I can do last comma first equals",
        "start": 5028.56,
        "duration": 6.56
    },
    {
        "text": "whatever matches in and get back all of",
        "start": 5033.0,
        "duration": 4.76
    },
    {
        "text": "the groups of matches then go ahead and",
        "start": 5035.12,
        "duration": 4.16
    },
    {
        "text": "update name just like before with a",
        "start": 5037.76,
        "duration": 4.919
    },
    {
        "text": "format string and do first and then last",
        "start": 5039.28,
        "duration": 5.48
    },
    {
        "text": "in curly braces as well and then at the",
        "start": 5042.679,
        "duration": 3.96
    },
    {
        "text": "very bottom just like before print out",
        "start": 5044.76,
        "duration": 5.919
    },
    {
        "text": "for instance hello comma name so the new",
        "start": 5046.639,
        "duration": 7.401
    },
    {
        "text": "code now is everything highlighted here",
        "start": 5050.679,
        "duration": 6.921
    },
    {
        "text": "I'm using re search to search for",
        "start": 5054.04,
        "duration": 5.8
    },
    {
        "text": "whether the user typed their name in",
        "start": 5057.6,
        "duration": 5.039
    },
    {
        "text": "last comma first format but I am more",
        "start": 5059.84,
        "duration": 6.04
    },
    {
        "text": "powerfully using re . search to capture",
        "start": 5062.639,
        "duration": 5.481
    },
    {
        "text": "some of the user's input what's going to",
        "start": 5065.88,
        "duration": 4.44
    },
    {
        "text": "get captured anything I surround it in",
        "start": 5068.12,
        "duration": 5.039
    },
    {
        "text": "parentheses will be returned to me as",
        "start": 5070.32,
        "duration": 5.44
    },
    {
        "text": "return values how do you get at those",
        "start": 5073.159,
        "duration": 4.801
    },
    {
        "text": "return values you ask the variable to",
        "start": 5075.76,
        "duration": 4.2
    },
    {
        "text": "which you assigned them for all of the",
        "start": 5077.96,
        "duration": 4.48
    },
    {
        "text": "groups all of the groups of parentheses",
        "start": 5079.96,
        "duration": 5.04
    },
    {
        "text": "that were captured so let me go ahead",
        "start": 5082.44,
        "duration": 4.6
    },
    {
        "text": "and do this let me go ahead now and run",
        "start": 5085.0,
        "duration": 5.239
    },
    {
        "text": "python of format. Pi enter and I'm going",
        "start": 5087.04,
        "duration": 6.56
    },
    {
        "text": "to type my name as usual in this case",
        "start": 5090.239,
        "duration": 6.281
    },
    {
        "text": "nothing happen happens with this if",
        "start": 5093.6,
        "duration": 5.079
    },
    {
        "text": "condition why because I did not type a",
        "start": 5096.52,
        "duration": 6.159
    },
    {
        "text": "comma and so this search does not find a",
        "start": 5098.679,
        "duration": 6.201
    },
    {
        "text": "comma so there are no matches so we",
        "start": 5102.679,
        "duration": 3.881
    },
    {
        "text": "immediately just print out hello name",
        "start": 5104.88,
        "duration": 4.319
    },
    {
        "text": "nothing interesting or new there but if",
        "start": 5106.56,
        "duration": 5.0
    },
    {
        "text": "I now go ahead and clear my screen and",
        "start": 5109.199,
        "duration": 5.04
    },
    {
        "text": "run python of format. and do maen commas",
        "start": 5111.56,
        "duration": 6.44
    },
    {
        "text": "space David enter we've reformatted my",
        "start": 5114.239,
        "duration": 6.161
    },
    {
        "text": "name well how did this work let me be a",
        "start": 5118.0,
        "duration": 4.8
    },
    {
        "text": "little more explicit now it turns out I",
        "start": 5120.4,
        "duration": 3.92
    },
    {
        "text": "don't have to just say matches. group",
        "start": 5122.8,
        "duration": 4.28
    },
    {
        "text": "groups I can get specific groups back",
        "start": 5124.32,
        "duration": 5.0
    },
    {
        "text": "that I want so let me change my code a",
        "start": 5127.08,
        "duration": 5.28
    },
    {
        "text": "little bit more let me go ahead now and",
        "start": 5129.32,
        "duration": 7.04
    },
    {
        "text": "just say this let's update name uh to",
        "start": 5132.36,
        "duration": 6.279
    },
    {
        "text": "well actually let's do this let's say",
        "start": 5136.36,
        "duration": 5.44
    },
    {
        "text": "that the last name is going to be in the",
        "start": 5138.639,
        "duration": 6.0
    },
    {
        "text": "matches but specifically group one the",
        "start": 5141.8,
        "duration": 4.839
    },
    {
        "text": "first name is going to be in the matches",
        "start": 5144.639,
        "duration": 3.881
    },
    {
        "text": "but specifically group two why one and",
        "start": 5146.639,
        "duration": 3.921
    },
    {
        "text": "two because this is the first set of",
        "start": 5148.52,
        "duration": 4.199
    },
    {
        "text": "parentheses to the left of the comma",
        "start": 5150.56,
        "duration": 3.92
    },
    {
        "text": "this is the second set of parentheses to",
        "start": 5152.719,
        "duration": 3.761
    },
    {
        "text": "the right of the comma and based on the",
        "start": 5154.48,
        "duration": 4.159
    },
    {
        "text": "input this would be the user's last name",
        "start": 5156.48,
        "duration": 4.32
    },
    {
        "text": "in this scenario me this would be the",
        "start": 5158.639,
        "duration": 5.161
    },
    {
        "text": "user's first name David in this scenario",
        "start": 5160.8,
        "duration": 5.72
    },
    {
        "text": "that's why I'm using group one for the",
        "start": 5163.8,
        "duration": 5.319
    },
    {
        "text": "last name and group two for the first",
        "start": 5166.52,
        "duration": 4.32
    },
    {
        "text": "name and now I'm going to go ahead and",
        "start": 5169.119,
        "duration": 6.281
    },
    {
        "text": "say name equals uh F string again uh",
        "start": 5170.84,
        "duration": 9.56
    },
    {
        "text": "first and then last done and let me",
        "start": 5175.4,
        "duration": 7.16
    },
    {
        "text": "refine this one last step before we take",
        "start": 5180.4,
        "duration": 3.92
    },
    {
        "text": "questions I don't really need these",
        "start": 5182.56,
        "duration": 3.76
    },
    {
        "text": "variables if I'm immediately using them",
        "start": 5184.32,
        "duration": 3.319
    },
    {
        "text": "let's just go ahead and tighten this up",
        "start": 5186.32,
        "duration": 2.76
    },
    {
        "text": "further as we've done in the past for",
        "start": 5187.639,
        "duration": 4.04
    },
    {
        "text": "design sake if I want to make the name",
        "start": 5189.08,
        "duration": 4.559
    },
    {
        "text": "the concatenation of the person's first",
        "start": 5191.679,
        "duration": 3.721
    },
    {
        "text": "name and last name let's just do this",
        "start": 5193.639,
        "duration": 6.961
    },
    {
        "text": "matches. group two first plus a space",
        "start": 5195.4,
        "duration": 8.799
    },
    {
        "text": "plus matches. group one so it's just up",
        "start": 5200.6,
        "duration": 5.76
    },
    {
        "text": "to me to know from left to right this is",
        "start": 5204.199,
        "duration": 4.601
    },
    {
        "text": "group one this is group two so group one",
        "start": 5206.36,
        "duration": 5.12
    },
    {
        "text": "is last group two is first so if I want",
        "start": 5208.8,
        "duration": 5.08
    },
    {
        "text": "to flip them around and update the value",
        "start": 5211.48,
        "duration": 4.92
    },
    {
        "text": "of name name I can explicitly get group",
        "start": 5213.88,
        "duration": 5.48
    },
    {
        "text": "two first concatenate using plus a",
        "start": 5216.4,
        "duration": 5.56
    },
    {
        "text": "single space and then concatenate on",
        "start": 5219.36,
        "duration": 6.04
    },
    {
        "text": "group one all right that was a lot let",
        "start": 5221.96,
        "duration": 5.6
    },
    {
        "text": "me pause to see if there are questions",
        "start": 5225.4,
        "duration": 3.6
    },
    {
        "text": "the key difference here is we're still",
        "start": 5227.56,
        "duration": 4.4
    },
    {
        "text": "using re. search the exact same way but",
        "start": 5229.0,
        "duration": 5.52
    },
    {
        "text": "now I'm using its return value not just",
        "start": 5231.96,
        "duration": 4.8
    },
    {
        "text": "to answer a question true or false but",
        "start": 5234.52,
        "duration": 4.719
    },
    {
        "text": "to actually get back specific matches",
        "start": 5236.76,
        "duration": 5.6
    },
    {
        "text": "anything I captured so to speak with",
        "start": 5239.239,
        "duration": 5.521
    },
    {
        "text": "parentheses why is it here we're using",
        "start": 5242.36,
        "duration": 4.879
    },
    {
        "text": "one and two instead of zero and one",
        "start": 5244.76,
        "duration": 4.439
    },
    {
        "text": "really good question caping the first a",
        "start": 5247.239,
        "duration": 3.801
    },
    {
        "text": "good observation in almost every other",
        "start": 5249.199,
        "duration": 3.881
    },
    {
        "text": "context we've started counting at zero",
        "start": 5251.04,
        "duration": 4.48
    },
    {
        "text": "and one instead of one and two it turns",
        "start": 5253.08,
        "duration": 4.52
    },
    {
        "text": "out there's something else in location",
        "start": 5255.52,
        "duration": 4.36
    },
    {
        "text": "zero when it comes back from re. search",
        "start": 5257.6,
        "duration": 4.16
    },
    {
        "text": "related to the string itself so",
        "start": 5259.88,
        "duration": 3.799
    },
    {
        "text": "according to the documentation of this",
        "start": 5261.76,
        "duration": 4.879
    },
    {
        "text": "function only one is the first set of",
        "start": 5263.679,
        "duration": 5.401
    },
    {
        "text": "parentheses and two is the second set",
        "start": 5266.639,
        "duration": 4.721
    },
    {
        "text": "and onward from there just a different",
        "start": 5269.08,
        "duration": 4.84
    },
    {
        "text": "convention here other questions uh what",
        "start": 5271.36,
        "duration": 6.56
    },
    {
        "text": "if we write nothing like whes space",
        "start": 5273.92,
        "duration": 7.68
    },
    {
        "text": "comma whes space uh how how we check um",
        "start": 5277.92,
        "duration": 6.6
    },
    {
        "text": "true of condition before I answer",
        "start": 5281.6,
        "duration": 4.28
    },
    {
        "text": "directly let me just run this and make",
        "start": 5284.52,
        "duration": 2.88
    },
    {
        "text": "sure I've not broken anything further",
        "start": 5285.88,
        "duration": 3.88
    },
    {
        "text": "let me run python of format. let me type",
        "start": 5287.4,
        "duration": 4.839
    },
    {
        "text": "in David space ma the right way let me",
        "start": 5289.76,
        "duration": 4.56
    },
    {
        "text": "run it once more let me type it Ma comma",
        "start": 5292.239,
        "duration": 4.44
    },
    {
        "text": "David the wrong way that we're fixing",
        "start": 5294.32,
        "duration": 4.44
    },
    {
        "text": "and we're still good but I think it will",
        "start": 5296.679,
        "duration": 3.721
    },
    {
        "text": "still break let me run it a third time",
        "start": 5298.76,
        "duration": 5.16
    },
    {
        "text": "with ma comma David with no space and",
        "start": 5300.4,
        "duration": 6.759
    },
    {
        "text": "now now it's still broken why because",
        "start": 5303.92,
        "duration": 7.279
    },
    {
        "text": "I'm still looking for comma space now",
        "start": 5307.159,
        "duration": 5.761
    },
    {
        "text": "how can I fix that one way I could do",
        "start": 5311.199,
        "duration": 3.44
    },
    {
        "text": "that is to add a question mark here",
        "start": 5312.92,
        "duration": 3.84
    },
    {
        "text": "which again is zero or more of the thing",
        "start": 5314.639,
        "duration": 4.6
    },
    {
        "text": "before so if I have a space and then a",
        "start": 5316.76,
        "duration": 4.32
    },
    {
        "text": "question mark literally no need for any",
        "start": 5319.239,
        "duration": 4.641
    },
    {
        "text": "parentheses then I can literally",
        "start": 5321.08,
        "duration": 6.599
    },
    {
        "text": "tolerate both ma comma space David or ma",
        "start": 5323.88,
        "duration": 6.359
    },
    {
        "text": "comma David so let's try again before",
        "start": 5327.679,
        "duration": 4.52
    },
    {
        "text": "this did not work let's do ma comma",
        "start": 5330.239,
        "duration": 5.241
    },
    {
        "text": "David with no space now it does actually",
        "start": 5332.199,
        "duration": 5.081
    },
    {
        "text": "work so we can tolerate different",
        "start": 5335.48,
        "duration": 4.12
    },
    {
        "text": "amounts of white space if I am a little",
        "start": 5337.28,
        "duration": 5.04
    },
    {
        "text": "more precise with my formula let me go",
        "start": 5339.6,
        "duration": 4.4
    },
    {
        "text": "ahead and try once more let me very",
        "start": 5342.32,
        "duration": 3.919
    },
    {
        "text": "weirdly but possibly hit the space bar a",
        "start": 5344.0,
        "duration": 4.08
    },
    {
        "text": "few too many times so now they're really",
        "start": 5346.239,
        "duration": 5.0
    },
    {
        "text": "separated this again is uh not going to",
        "start": 5348.08,
        "duration": 5.079
    },
    {
        "text": "work quite right because it's going to",
        "start": 5351.239,
        "duration": 4.601
    },
    {
        "text": "consume all of that white space so now I",
        "start": 5353.159,
        "duration": 5.161
    },
    {
        "text": "might want to strip left and right any",
        "start": 5355.84,
        "duration": 4.56
    },
    {
        "text": "of the leading white space on the result",
        "start": 5358.32,
        "duration": 4.72
    },
    {
        "text": "or what I could do here is say this",
        "start": 5360.4,
        "duration": 6.48
    },
    {
        "text": "instead of zero or one I could use a",
        "start": 5363.04,
        "duration": 7.4
    },
    {
        "text": "star here so space star and now if I run",
        "start": 5366.88,
        "duration": 5.839
    },
    {
        "text": "this once more with ma comma space space",
        "start": 5370.44,
        "duration": 4.6
    },
    {
        "text": "space David enter now we've cleaned up",
        "start": 5372.719,
        "duration": 4.321
    },
    {
        "text": "things further so you can imagine",
        "start": 5375.04,
        "duration": 4.199
    },
    {
        "text": "depending on how messy the data is that",
        "start": 5377.04,
        "duration": 3.639
    },
    {
        "text": "you're cleaning up your regular",
        "start": 5379.239,
        "duration": 3.0
    },
    {
        "text": "Expressions might need to get more and",
        "start": 5380.679,
        "duration": 3.56
    },
    {
        "text": "more sophisticated it really depends on",
        "start": 5382.239,
        "duration": 4.081
    },
    {
        "text": "just how many problems we want to solve",
        "start": 5384.239,
        "duration": 4.92
    },
    {
        "text": "at once well allow me to propose that we",
        "start": 5386.32,
        "duration": 5.24
    },
    {
        "text": "Forge ahead further just to clean this",
        "start": 5389.159,
        "duration": 4.401
    },
    {
        "text": "up even more so using a feature that's",
        "start": 5391.56,
        "duration": 5.079
    },
    {
        "text": "actually relatively new to python itself",
        "start": 5393.56,
        "duration": 5.119
    },
    {
        "text": "it is very common when using regular",
        "start": 5396.639,
        "duration": 3.961
    },
    {
        "text": "Expressions to do exactly what I've done",
        "start": 5398.679,
        "duration": 4.801
    },
    {
        "text": "here to call a function like re. search",
        "start": 5400.6,
        "duration": 5.8
    },
    {
        "text": "with capturing parentheses inside such",
        "start": 5403.48,
        "duration": 4.56
    },
    {
        "text": "that you get back a return value that",
        "start": 5406.4,
        "duration": 3.12
    },
    {
        "text": "I'm calling matches you could call it",
        "start": 5408.04,
        "duration": 2.96
    },
    {
        "text": "something else but I'm calling it by",
        "start": 5409.52,
        "duration": 3.639
    },
    {
        "text": "default matches and then notice on the",
        "start": 5411.0,
        "duration": 4.96
    },
    {
        "text": "next line I'm saying if matches wouldn't",
        "start": 5413.159,
        "duration": 4.08
    },
    {
        "text": "it be nice if I could just tighten",
        "start": 5415.96,
        "duration": 3.56
    },
    {
        "text": "things up further and do these all on",
        "start": 5417.239,
        "duration": 6.081
    },
    {
        "text": "the same line well you can sort of let",
        "start": 5419.52,
        "duration": 6.0
    },
    {
        "text": "me go ahead do this let me get rid of",
        "start": 5423.32,
        "duration": 4.319
    },
    {
        "text": "this if and let me just try to say",
        "start": 5425.52,
        "duration": 5.24
    },
    {
        "text": "something like this if matches equals re",
        "start": 5427.639,
        "duration": 7.321
    },
    {
        "text": "search and then colon so combining my if",
        "start": 5430.76,
        "duration": 7.16
    },
    {
        "text": "condition into just one line instead of",
        "start": 5434.96,
        "duration": 6.84
    },
    {
        "text": "those two um in C or C++ or Java you",
        "start": 5437.92,
        "duration": 5.48
    },
    {
        "text": "would actually do something like this",
        "start": 5441.8,
        "duration": 2.919
    },
    {
        "text": "surrounding the whole thing with",
        "start": 5443.4,
        "duration": 2.96
    },
    {
        "text": "parentheses sometimes double sets to",
        "start": 5444.719,
        "duration": 3.721
    },
    {
        "text": "suppress any warnings if you want to do",
        "start": 5446.36,
        "duration": 4.879
    },
    {
        "text": "two things at once if you want to not",
        "start": 5448.44,
        "duration": 6.56
    },
    {
        "text": "only assign the return value of re.",
        "start": 5451.239,
        "duration": 6.44
    },
    {
        "text": "search to a variable called matches but",
        "start": 5455.0,
        "duration": 4.92
    },
    {
        "text": "you want to subsequently ask a Boolean",
        "start": 5457.679,
        "duration": 5.241
    },
    {
        "text": "question is this effectively true or",
        "start": 5459.92,
        "duration": 4.68
    },
    {
        "text": "false that's what I was doing a moment",
        "start": 5462.92,
        "duration": 4.04
    },
    {
        "text": "ago let me undo this a moment ago I was",
        "start": 5464.6,
        "duration": 3.88
    },
    {
        "text": "getting back the return value and",
        "start": 5466.96,
        "duration": 3.96
    },
    {
        "text": "assigning it to matches and then I was",
        "start": 5468.48,
        "duration": 4.679
    },
    {
        "text": "asking the question well it turns out",
        "start": 5470.92,
        "duration": 4.6
    },
    {
        "text": "this need to have two lines of code",
        "start": 5473.159,
        "duration": 4.52
    },
    {
        "text": "presumably rubbed people wrong for too",
        "start": 5475.52,
        "duration": 4.119
    },
    {
        "text": "long in Python and so you can now",
        "start": 5477.679,
        "duration": 4.0
    },
    {
        "text": "combine these two kinds of lines into",
        "start": 5479.639,
        "duration": 4.921
    },
    {
        "text": "one but you need a new operator",
        "start": 5481.679,
        "duration": 5.641
    },
    {
        "text": "you cannot just say if matches equals re",
        "start": 5484.56,
        "duration": 5.36
    },
    {
        "text": "search and then analin at the end you",
        "start": 5487.32,
        "duration": 6.08
    },
    {
        "text": "instead need to do this you need to do",
        "start": 5489.92,
        "duration": 7.36
    },
    {
        "text": "colon equals if and only if you want to",
        "start": 5493.4,
        "duration": 6.319
    },
    {
        "text": "assign something from right to left and",
        "start": 5497.28,
        "duration": 5.16
    },
    {
        "text": "you want to ask an if or an L if",
        "start": 5499.719,
        "duration": 5.48
    },
    {
        "text": "question on the same line This is",
        "start": 5502.44,
        "duration": 4.48
    },
    {
        "text": "affectionately known as you can see here",
        "start": 5505.199,
        "duration": 4.681
    },
    {
        "text": "as the walrus operator and it's new to",
        "start": 5506.92,
        "duration": 5.44
    },
    {
        "text": "python in recent years and it both",
        "start": 5509.88,
        "duration": 5.319
    },
    {
        "text": "allows you to assign value as I'm doing",
        "start": 5512.36,
        "duration": 6.4
    },
    {
        "text": "from right to left and ask a Boolean",
        "start": 5515.199,
        "duration": 5.321
    },
    {
        "text": "question about it like I'm doing with",
        "start": 5518.76,
        "duration": 4.6
    },
    {
        "text": "the if or equivalently L if does anyone",
        "start": 5520.52,
        "duration": 5.119
    },
    {
        "text": "know why this is called The Walrus",
        "start": 5523.36,
        "duration": 5.6
    },
    {
        "text": "operator if you kind of look at it like",
        "start": 5525.639,
        "duration": 5.441
    },
    {
        "text": "this perhaps if you're familiar with",
        "start": 5528.96,
        "duration": 4.6
    },
    {
        "text": "walruses it kind of sort of looks like a",
        "start": 5531.08,
        "duration": 4.2
    },
    {
        "text": "walrus so a minor detail but a",
        "start": 5533.56,
        "duration": 3.559
    },
    {
        "text": "relatively new feature of python that",
        "start": 5535.28,
        "duration": 3.68
    },
    {
        "text": "honestly you'll probably continue to see",
        "start": 5537.119,
        "duration": 3.481
    },
    {
        "text": "online and in source code and in",
        "start": 5538.96,
        "duration": 3.96
    },
    {
        "text": "textbooks and so forth increasingly so",
        "start": 5540.6,
        "duration": 4.2
    },
    {
        "text": "now that it does exist it does not",
        "start": 5542.92,
        "duration": 3.68
    },
    {
        "text": "change the logic at all if I run Python",
        "start": 5544.8,
        "duration": 4.439
    },
    {
        "text": "A format. piy and type ma commas space",
        "start": 5546.6,
        "duration": 4.599
    },
    {
        "text": "David it still fixes things but it's",
        "start": 5549.239,
        "duration": 4.761
    },
    {
        "text": "tightened up my code just a bit more all",
        "start": 5551.199,
        "duration": 4.601
    },
    {
        "text": "right let's go ahead and look at one",
        "start": 5554.0,
        "duration": 4.199
    },
    {
        "text": "final problem to solve that of",
        "start": 5555.8,
        "duration": 4.919
    },
    {
        "text": "extracting information now as well so at",
        "start": 5558.199,
        "duration": 4.52
    },
    {
        "text": "this point we've now validated the",
        "start": 5560.719,
        "duration": 3.801
    },
    {
        "text": "user's input by checking whether or not",
        "start": 5562.719,
        "duration": 4.161
    },
    {
        "text": "it meets a certain pattern we've cleaned",
        "start": 5564.52,
        "duration": 5.04
    },
    {
        "text": "up the users input by checking against a",
        "start": 5566.88,
        "duration": 4.44
    },
    {
        "text": "pattern whether it matches or not and if",
        "start": 5569.56,
        "duration": 3.76
    },
    {
        "text": "it does match we kind of reorganize some",
        "start": 5571.32,
        "duration": 3.64
    },
    {
        "text": "of the users information so we can clean",
        "start": 5573.32,
        "duration": 3.52
    },
    {
        "text": "up their input and standardize the",
        "start": 5574.96,
        "duration": 3.36
    },
    {
        "text": "format in which we're storing or",
        "start": 5576.84,
        "duration": 3.399
    },
    {
        "text": "printing it in this case let's do one",
        "start": 5578.32,
        "duration": 3.48
    },
    {
        "text": "final example where we're very",
        "start": 5580.239,
        "duration": 4.161
    },
    {
        "text": "specifically extracting information in",
        "start": 5581.8,
        "duration": 5.2
    },
    {
        "text": "order to answer some question so let me",
        "start": 5584.4,
        "duration": 4.56
    },
    {
        "text": "propose this let me go ahead and close",
        "start": 5587.0,
        "duration": 4.199
    },
    {
        "text": "format. and create a new file called",
        "start": 5588.96,
        "duration": 4.96
    },
    {
        "text": "twitter. py the goal of which is to",
        "start": 5591.199,
        "duration": 5.361
    },
    {
        "text": "prompt users for the URL of their",
        "start": 5593.92,
        "duration": 6.0
    },
    {
        "text": "Twitter profile and extract from it",
        "start": 5596.56,
        "duration": 6.44
    },
    {
        "text": "infer from that URL what is the user's",
        "start": 5599.92,
        "duration": 4.719
    },
    {
        "text": "username now why might you want to do",
        "start": 5603.0,
        "duration": 3.28
    },
    {
        "text": "this well one you might want users to be",
        "start": 5604.639,
        "duration": 3.48
    },
    {
        "text": "able to just very easily copy and paste",
        "start": 5606.28,
        "duration": 4.04
    },
    {
        "text": "the URL from their own Twitter profile",
        "start": 5608.119,
        "duration": 5.0
    },
    {
        "text": "into your form into your app so that you",
        "start": 5610.32,
        "duration": 6.0
    },
    {
        "text": "can figure out what their uh username is",
        "start": 5613.119,
        "duration": 5.6
    },
    {
        "text": "or you might have a form that asks the",
        "start": 5616.32,
        "duration": 4.2
    },
    {
        "text": "user for their Twitter username and",
        "start": 5618.719,
        "duration": 3.48
    },
    {
        "text": "because people aren't necessarily paying",
        "start": 5620.52,
        "duration": 4.119
    },
    {
        "text": "very close attention some people type",
        "start": 5622.199,
        "duration": 4.561
    },
    {
        "text": "their username some people type their",
        "start": 5624.639,
        "duration": 4.761
    },
    {
        "text": "whole URL or something else altogether",
        "start": 5626.76,
        "duration": 4.0
    },
    {
        "text": "it would be nice now that you're a",
        "start": 5629.4,
        "duration": 3.2
    },
    {
        "text": "programmer to just be more tolerant of",
        "start": 5630.76,
        "duration": 3.64
    },
    {
        "text": "different types of input and just take",
        "start": 5632.6,
        "duration": 3.88
    },
    {
        "text": "on the burden of canonicalizing",
        "start": 5634.4,
        "duration": 4.36
    },
    {
        "text": "standardizing the data but being",
        "start": 5636.48,
        "duration": 4.28
    },
    {
        "text": "flexible with the users it's arguably a",
        "start": 5638.76,
        "duration": 3.76
    },
    {
        "text": "better user experience if you just let",
        "start": 5640.76,
        "duration": 4.24
    },
    {
        "text": "me copy paste or type in what I want you",
        "start": 5642.52,
        "duration": 5.04
    },
    {
        "text": "clean it up you're the programmer not me",
        "start": 5645.0,
        "duration": 4.92
    },
    {
        "text": "lenss for a better experience perhaps",
        "start": 5647.56,
        "duration": 4.04
    },
    {
        "text": "well let me go ahead and do this with",
        "start": 5649.92,
        "duration": 3.799
    },
    {
        "text": "twitter. let me first go ahead and",
        "start": 5651.6,
        "duration": 5.079
    },
    {
        "text": "prompt the user here for a value for a",
        "start": 5653.719,
        "duration": 5.241
    },
    {
        "text": "variable that I'll call URL and just ask",
        "start": 5656.679,
        "duration": 4.44
    },
    {
        "text": "them to input the URL of their Twitter",
        "start": 5658.96,
        "duration": 3.88
    },
    {
        "text": "profile I'm going to go ahead and strip",
        "start": 5661.119,
        "duration": 3.56
    },
    {
        "text": "off any leading or trailing whites space",
        "start": 5662.84,
        "duration": 3.44
    },
    {
        "text": "just in case users accidentally hit the",
        "start": 5664.679,
        "duration": 3.04
    },
    {
        "text": "space bar that's like literally the",
        "start": 5666.28,
        "duration": 4.08
    },
    {
        "text": "least I can do quite easily but now",
        "start": 5667.719,
        "duration": 5.161
    },
    {
        "text": "let's go ahead and do this suppose that",
        "start": 5670.36,
        "duration": 6.839
    },
    {
        "text": "the users's address is the following let",
        "start": 5672.88,
        "duration": 6.08
    },
    {
        "text": "me print out what they type in and let",
        "start": 5677.199,
        "duration": 3.361
    },
    {
        "text": "me clear my screen and run python of",
        "start": 5678.96,
        "duration": 3.48
    },
    {
        "text": "twitter. I'm going to go ahead and type",
        "start": 5680.56,
        "duration": 4.04
    },
    {
        "text": "in for instance",
        "start": 5682.44,
        "duration": 3.799
    },
    {
        "text": "https",
        "start": 5684.6,
        "duration": 4.119
    },
    {
        "text": "twitter.com davidj ma which happens to",
        "start": 5686.239,
        "duration": 4.92
    },
    {
        "text": "be my own Twitter username for now we're",
        "start": 5688.719,
        "duration": 3.761
    },
    {
        "text": "just going to print it back onto the",
        "start": 5691.159,
        "duration": 2.881
    },
    {
        "text": "screen just to make sure I've not messed",
        "start": 5692.48,
        "duration": 3.84
    },
    {
        "text": "up yet okay so I've printed back out the",
        "start": 5694.04,
        "duration": 4.079
    },
    {
        "text": "exact same URL but the goal at hand is",
        "start": 5696.32,
        "duration": 5.52
    },
    {
        "text": "to extract the username only now let me",
        "start": 5698.119,
        "duration": 6.12
    },
    {
        "text": "just ask perhaps a straightforward",
        "start": 5701.84,
        "duration": 5.359
    },
    {
        "text": "question logically what do I need to do",
        "start": 5704.239,
        "duration": 6.92
    },
    {
        "text": "to get at the user's username well uh we",
        "start": 5707.199,
        "duration": 6.761
    },
    {
        "text": "just ignore what's before the username",
        "start": 5711.159,
        "duration": 5.361
    },
    {
        "text": "and then just extract the username",
        "start": 5713.96,
        "duration": 4.08
    },
    {
        "text": "perfect yeah I mean it is as simple as",
        "start": 5716.52,
        "duration": 3.24
    },
    {
        "text": "that if you know the usernames at the",
        "start": 5718.04,
        "duration": 3.92
    },
    {
        "text": "end well let's just somehow ignore",
        "start": 5719.76,
        "duration": 3.68
    },
    {
        "text": "everything to the beginning well what's",
        "start": 5721.96,
        "duration": 3.4
    },
    {
        "text": "it beginning well it's a URL so we're",
        "start": 5723.44,
        "duration": 3.56
    },
    {
        "text": "probably going to need to ignore an",
        "start": 5725.36,
        "duration": 6.52
    },
    {
        "text": "https a colon a twitter.com and a slash",
        "start": 5727.0,
        "duration": 6.52
    },
    {
        "text": "so we just want to throw all of that",
        "start": 5731.88,
        "duration": 4.52
    },
    {
        "text": "away why because if it's URL We Know by",
        "start": 5733.52,
        "duration": 4.56
    },
    {
        "text": "how Twitter works that the username",
        "start": 5736.4,
        "duration": 4.16
    },
    {
        "text": "comes at the end so let's use that very",
        "start": 5738.08,
        "duration": 5.039
    },
    {
        "text": "simple idea to get at the information we",
        "start": 5740.56,
        "duration": 3.8
    },
    {
        "text": "want well I'm going to try this a few",
        "start": 5743.119,
        "duration": 2.841
    },
    {
        "text": "different ways let me go back into my",
        "start": 5744.36,
        "duration": 2.64
    },
    {
        "text": "program here and instead of just",
        "start": 5745.96,
        "duration": 2.84
    },
    {
        "text": "printing it out which was just to see",
        "start": 5747.0,
        "duration": 4.0
    },
    {
        "text": "what's going on let me do this let me",
        "start": 5748.8,
        "duration": 4.48
    },
    {
        "text": "create a new variable called username",
        "start": 5751.0,
        "duration": 6.36
    },
    {
        "text": "and let me call url. replace it turns",
        "start": 5753.28,
        "duration": 7.32
    },
    {
        "text": "out that if URL is a string or a stir in",
        "start": 5757.36,
        "duration": 5.44
    },
    {
        "text": "Python it again comes with multiple",
        "start": 5760.6,
        "duration": 5.4
    },
    {
        "text": "methods like strip uh and split and",
        "start": 5762.8,
        "duration": 5.319
    },
    {
        "text": "others as well one of which is called",
        "start": 5766.0,
        "duration": 4.36
    },
    {
        "text": "replace and replace will do just that",
        "start": 5768.119,
        "duration": 4.201
    },
    {
        "text": "you pass it two arguments the first of",
        "start": 5770.36,
        "duration": 4.24
    },
    {
        "text": "which is what do you want to replace the",
        "start": 5772.32,
        "duration": 4.12
    },
    {
        "text": "second argument is what do you want to",
        "start": 5774.6,
        "duration": 4.039
    },
    {
        "text": "replace it with so if I want to get rid",
        "start": 5776.44,
        "duration": 3.96
    },
    {
        "text": "of as I've been proposed really just",
        "start": 5778.639,
        "duration": 3.321
    },
    {
        "text": "everything before the username that is",
        "start": 5780.4,
        "duration": 4.68
    },
    {
        "text": "the Twitter URL or the beginning thereof",
        "start": 5781.96,
        "duration": 6.56
    },
    {
        "text": "let's just say this go ahead and replace",
        "start": 5785.08,
        "duration": 5.52
    },
    {
        "text": "https",
        "start": 5788.52,
        "duration": 4.639
    },
    {
        "text": "twitter.com close quote that's what I",
        "start": 5790.6,
        "duration": 4.8
    },
    {
        "text": "want to replace and comma second",
        "start": 5793.159,
        "duration": 3.56
    },
    {
        "text": "argument what do you want to replace it",
        "start": 5795.4,
        "duration": 3.319
    },
    {
        "text": "with nothing so I'm literally going to",
        "start": 5796.719,
        "duration": 4.44
    },
    {
        "text": "pass in quote unquote to effectively do",
        "start": 5798.719,
        "duration": 4.241
    },
    {
        "text": "a find and replace that's what the",
        "start": 5801.159,
        "duration": 3.321
    },
    {
        "text": "replace method does just like you can do",
        "start": 5802.96,
        "duration": 3.279
    },
    {
        "text": "it in Microsoft Word or Google Docs this",
        "start": 5804.48,
        "duration": 3.719
    },
    {
        "text": "is the programmer's way of doing find",
        "start": 5806.239,
        "duration": 4.96
    },
    {
        "text": "and replace now let me go ahead and",
        "start": 5808.199,
        "duration": 5.0
    },
    {
        "text": "print out just the username so I'll use",
        "start": 5811.199,
        "duration": 4.601
    },
    {
        "text": "an F string like this I'll say username",
        "start": 5813.199,
        "duration": 4.881
    },
    {
        "text": "colon and then in curly braces username",
        "start": 5815.8,
        "duration": 4.359
    },
    {
        "text": "just to format it nicely all right let",
        "start": 5818.08,
        "duration": 3.559
    },
    {
        "text": "me go ahead and clear my screen and run",
        "start": 5820.159,
        "duration": 4.401
    },
    {
        "text": "python of twitter. py enter URL here we",
        "start": 5821.639,
        "duration": 3.881
    },
    {
        "text": "go",
        "start": 5824.56,
        "duration": 3.96
    },
    {
        "text": "https",
        "start": 5825.52,
        "duration": 3.0
    },
    {
        "text": "twitter.com SL davidj maen enter okay",
        "start": 5828.56,
        "duration": 7.079
    },
    {
        "text": "now we've made some progress done for",
        "start": 5833.4,
        "duration": 5.56
    },
    {
        "text": "the day right well what is suboptimal",
        "start": 5835.639,
        "duration": 6.04
    },
    {
        "text": "about this can anyone critique or find",
        "start": 5838.96,
        "duration": 6.8
    },
    {
        "text": "fault with my program it is working now",
        "start": 5841.679,
        "duration": 6.921
    },
    {
        "text": "but it's a little fragile I bet we could",
        "start": 5845.76,
        "duration": 4.76
    },
    {
        "text": "contrive some scenarios where I think it",
        "start": 5848.6,
        "duration": 4.2
    },
    {
        "text": "works but it doesn't well I have a few",
        "start": 5850.52,
        "duration": 5.04
    },
    {
        "text": "ideas actually well first of all uh if",
        "start": 5852.8,
        "duration": 6.399
    },
    {
        "text": "we if we don't specify https it will",
        "start": 5855.56,
        "duration": 6.72
    },
    {
        "text": "broken secondly if we have slash at the",
        "start": 5859.199,
        "duration": 6.0
    },
    {
        "text": "end it also will be broken if we if we",
        "start": 5862.28,
        "duration": 5.399
    },
    {
        "text": "have like question mark something after",
        "start": 5865.199,
        "duration": 5.201
    },
    {
        "text": "question mark it also won't work so a",
        "start": 5867.679,
        "duration": 4.48
    },
    {
        "text": "lot of scenario actually oh my God I",
        "start": 5870.4,
        "duration": 3.839
    },
    {
        "text": "mean here we are I pretending to think I",
        "start": 5872.159,
        "duration": 3.721
    },
    {
        "text": "was done but my God like Alex gave us a",
        "start": 5874.239,
        "duration": 3.721
    },
    {
        "text": "whole laundry list of like problems and",
        "start": 5875.88,
        "duration": 3.799
    },
    {
        "text": "just to recap then what if it's not",
        "start": 5877.96,
        "duration": 4.92
    },
    {
        "text": "https it's HTTP slightly less secure but",
        "start": 5879.679,
        "duration": 5.0
    },
    {
        "text": "I should still be able to tolerate that",
        "start": 5882.88,
        "duration": 3.68
    },
    {
        "text": "programmatically uh what if the protocol",
        "start": 5884.679,
        "duration": 3.241
    },
    {
        "text": "is not there what if the user just type",
        "start": 5886.56,
        "duration": 3.52
    },
    {
        "text": "twitter.com davidj mailin it would be",
        "start": 5887.92,
        "duration": 4.12
    },
    {
        "text": "nice to tolerate that rather than show",
        "start": 5890.08,
        "duration": 3.519
    },
    {
        "text": "an error and make me type in the",
        "start": 5892.04,
        "duration": 3.36
    },
    {
        "text": "protocol why it's not good user",
        "start": 5893.599,
        "duration": 4.321
    },
    {
        "text": "experience what if it had a slash at the",
        "start": 5895.4,
        "duration": 4.64
    },
    {
        "text": "end of the username or a question mark",
        "start": 5897.92,
        "duration": 3.84
    },
    {
        "text": "If you think about URLs you've seen on",
        "start": 5900.04,
        "duration": 3.8
    },
    {
        "text": "the web there's very commonly more",
        "start": 5901.76,
        "duration": 3.479
    },
    {
        "text": "information especially if it's been",
        "start": 5903.84,
        "duration": 3.0
    },
    {
        "text": "shared on social media there might be",
        "start": 5905.239,
        "duration": 4.0
    },
    {
        "text": "HTTP parameters so to speak just stuff",
        "start": 5906.84,
        "duration": 3.759
    },
    {
        "text": "there that we don't want there could be",
        "start": 5909.239,
        "duration": 2.601
    },
    {
        "text": "a",
        "start": 5910.599,
        "duration": 3.281
    },
    {
        "text": "www.twitter.com which I'm also not",
        "start": 5911.84,
        "duration": 3.96
    },
    {
        "text": "expecting but does work if you go to",
        "start": 5913.88,
        "duration": 4.48
    },
    {
        "text": "that URL too so there's just so many",
        "start": 5915.8,
        "duration": 4.319
    },
    {
        "text": "things that can go wrong and even if I",
        "start": 5918.36,
        "duration": 3.96
    },
    {
        "text": "come back to my contrived example as",
        "start": 5920.119,
        "duration": 4.161
    },
    {
        "text": "earlier what if I run this program and",
        "start": 5922.32,
        "duration": 5.76
    },
    {
        "text": "say this uh my username is",
        "start": 5924.28,
        "duration": 5.359
    },
    {
        "text": "https",
        "start": 5928.08,
        "duration": 6.039
    },
    {
        "text": "twitter.com davidj mailen enter well",
        "start": 5929.639,
        "duration": 7.48
    },
    {
        "text": "that too just just didn't really work it",
        "start": 5934.119,
        "duration": 5.12
    },
    {
        "text": "got rid of the U",
        "start": 5937.119,
        "duration": 4.0
    },
    {
        "text": "actually okay actually that kind of",
        "start": 5939.239,
        "duration": 4.761
    },
    {
        "text": "worked but the goal here is to actually",
        "start": 5941.119,
        "duration": 4.961
    },
    {
        "text": "get the user's username not an English",
        "start": 5944.0,
        "duration": 4.159
    },
    {
        "text": "sentence describing the user's username",
        "start": 5946.08,
        "duration": 4.119
    },
    {
        "text": "so I would argue that even though I just",
        "start": 5948.159,
        "duration": 3.721
    },
    {
        "text": "accidentally created perfectly correct",
        "start": 5950.199,
        "duration": 4.201
    },
    {
        "text": "English grammar I did not extract the",
        "start": 5951.88,
        "duration": 4.52
    },
    {
        "text": "Twitter username correctly I don't want",
        "start": 5954.4,
        "duration": 4.839
    },
    {
        "text": "words like my username is as part of my",
        "start": 5956.4,
        "duration": 5.08
    },
    {
        "text": "input so how can we go about improving",
        "start": 5959.239,
        "duration": 3.92
    },
    {
        "text": "this and maybe chipping away at some of",
        "start": 5961.48,
        "duration": 3.239
    },
    {
        "text": "those problems one by one well let me",
        "start": 5963.159,
        "duration": 3.681
    },
    {
        "text": "clear my screen here let me come back up",
        "start": 5964.719,
        "duration": 4.641
    },
    {
        "text": "to my code and let me not just replace",
        "start": 5966.84,
        "duration": 4.799
    },
    {
        "text": "it but let me do something else instead",
        "start": 5969.36,
        "duration": 3.839
    },
    {
        "text": "I'm going to go ahead and instead of",
        "start": 5971.639,
        "duration": 3.241
    },
    {
        "text": "using replace I'm going to use another",
        "start": 5973.199,
        "duration": 4.601
    },
    {
        "text": "function called remove prefix a prefix",
        "start": 5974.88,
        "duration": 5.44
    },
    {
        "text": "is a string or a subring that comes at",
        "start": 5977.8,
        "duration": 5.2
    },
    {
        "text": "the start of another so if I remove",
        "start": 5980.32,
        "duration": 4.279
    },
    {
        "text": "prefix I don't need a second argument",
        "start": 5983.0,
        "duration": 3.76
    },
    {
        "text": "for this function I just need one what",
        "start": 5984.599,
        "duration": 4.281
    },
    {
        "text": "prefix do you want to remove so this",
        "start": 5986.76,
        "duration": 4.879
    },
    {
        "text": "will at least now fix the problem I just",
        "start": 5988.88,
        "duration": 4.759
    },
    {
        "text": "described of typing in like a whole sent",
        "start": 5991.639,
        "duration": 3.96
    },
    {
        "text": "where the URL is there but it's not the",
        "start": 5993.639,
        "duration": 4.841
    },
    {
        "text": "beginning it's only at the end so here",
        "start": 5995.599,
        "duration": 4.801
    },
    {
        "text": "this still is not correct but we don't",
        "start": 5998.48,
        "duration": 3.759
    },
    {
        "text": "create this weird looking output that",
        "start": 6000.4,
        "duration": 4.839
    },
    {
        "text": "just removes the URL part of the input",
        "start": 6002.239,
        "duration": 5.761
    },
    {
        "text": "uh my username is",
        "start": 6005.239,
        "duration": 6.601
    },
    {
        "text": "htps twitter.com davidj maen a moment",
        "start": 6008.0,
        "duration": 7.4
    },
    {
        "text": "ago it did remove the URL and left only",
        "start": 6011.84,
        "duration": 6.08
    },
    {
        "text": "the David J ma this is not perfect still",
        "start": 6015.4,
        "duration": 4.96
    },
    {
        "text": "but at least now it does not weirdly",
        "start": 6017.92,
        "duration": 4.52
    },
    {
        "text": "remove the URL and then leave the",
        "start": 6020.36,
        "duration": 4.4
    },
    {
        "text": "English it's just leaving it alone so",
        "start": 6022.44,
        "duration": 3.84
    },
    {
        "text": "maybe I could handle this better but at",
        "start": 6024.76,
        "duration": 3.399
    },
    {
        "text": "least it's removing it from the part of",
        "start": 6026.28,
        "duration": 3.56
    },
    {
        "text": "the string I might",
        "start": 6028.159,
        "duration": 3.921
    },
    {
        "text": "anticipate well what else could we do",
        "start": 6029.84,
        "duration": 4.12
    },
    {
        "text": "here well it turns out that like regular",
        "start": 6032.08,
        "duration": 4.639
    },
    {
        "text": "Expressions just let us express patterns",
        "start": 6033.96,
        "duration": 4.8
    },
    {
        "text": "much more precisely we could spend all",
        "start": 6036.719,
        "duration": 3.52
    },
    {
        "text": "day using a whole bunch of different",
        "start": 6038.76,
        "duration": 3.52
    },
    {
        "text": "python functions like remove prefix or",
        "start": 6040.239,
        "duration": 4.561
    },
    {
        "text": "remove and strip and others and kind of",
        "start": 6042.28,
        "duration": 5.359
    },
    {
        "text": "make our way to the right solution but a",
        "start": 6044.8,
        "duration": 4.48
    },
    {
        "text": "regular expression just allows you to",
        "start": 6047.639,
        "duration": 3.681
    },
    {
        "text": "more succinctly if admittedly more",
        "start": 6049.28,
        "duration": 4.6
    },
    {
        "text": "cryptically Express these kinds of",
        "start": 6051.32,
        "duration": 4.56
    },
    {
        "text": "patterns and goals and we've seen from",
        "start": 6053.88,
        "duration": 4.0
    },
    {
        "text": "parentheses which can be used not just",
        "start": 6055.88,
        "duration": 4.92
    },
    {
        "text": "to group symbols together as sets but to",
        "start": 6057.88,
        "duration": 5.359
    },
    {
        "text": "capture information as well we have a",
        "start": 6060.8,
        "duration": 5.919
    },
    {
        "text": "very powerful tool now in our toolkit so",
        "start": 6063.239,
        "duration": 6.161
    },
    {
        "text": "let me do this let me go ahead and start",
        "start": 6066.719,
        "duration": 6.0
    },
    {
        "text": "fresh here and import the re Library as",
        "start": 6069.4,
        "duration": 5.08
    },
    {
        "text": "before at the very top of my program I'm",
        "start": 6072.719,
        "duration": 3.92
    },
    {
        "text": "still going to get the user's URL via",
        "start": 6074.48,
        "duration": 4.04
    },
    {
        "text": "the same line of code but I'm now going",
        "start": 6076.639,
        "duration": 4.761
    },
    {
        "text": "to use another function as well it turns",
        "start": 6078.52,
        "duration": 5.28
    },
    {
        "text": "out that there's not just re do search",
        "start": 6081.4,
        "duration": 4.88
    },
    {
        "text": "or rd. match or re. full match there's",
        "start": 6083.8,
        "duration": 5.879
    },
    {
        "text": "also re. sub in the regular expression",
        "start": 6086.28,
        "duration": 5.839
    },
    {
        "text": "Library where sub here means substitute",
        "start": 6089.679,
        "duration": 4.241
    },
    {
        "text": "and it takes more arguments but they're",
        "start": 6092.119,
        "duration": 3.52
    },
    {
        "text": "fairly straightforward the first",
        "start": 6093.92,
        "duration": 4.12
    },
    {
        "text": "argument to re.sub is the pattern the",
        "start": 6095.639,
        "duration": 4.04
    },
    {
        "text": "regular expression that you want to look",
        "start": 6098.04,
        "duration": 4.76
    },
    {
        "text": "for then you have a replacement string",
        "start": 6099.679,
        "duration": 5.241
    },
    {
        "text": "what do you want to replace that pattern",
        "start": 6102.8,
        "duration": 4.2
    },
    {
        "text": "with and where do you want to do all",
        "start": 6104.92,
        "duration": 4.279
    },
    {
        "text": "that will you pass in the string that",
        "start": 6107.0,
        "duration": 4.56
    },
    {
        "text": "you want to do the substitution on then",
        "start": 6109.199,
        "duration": 3.761
    },
    {
        "text": "there's some other arguments that I'll",
        "start": 6111.56,
        "duration": 3.039
    },
    {
        "text": "wave my hands up for now among them are",
        "start": 6112.96,
        "duration": 3.4
    },
    {
        "text": "those same flags and also a count like",
        "start": 6114.599,
        "duration": 3.52
    },
    {
        "text": "how many times do you want to do find",
        "start": 6116.36,
        "duration": 3.92
    },
    {
        "text": "and replace do you want it to do all or",
        "start": 6118.119,
        "duration": 4.0
    },
    {
        "text": "do you want to do it just one or so",
        "start": 6120.28,
        "duration": 3.439
    },
    {
        "text": "forth you can have further control there",
        "start": 6122.119,
        "duration": 3.401
    },
    {
        "text": "too just like you would in Google Docs",
        "start": 6123.719,
        "duration": 3.88
    },
    {
        "text": "or Microsoft Word well let me go back to",
        "start": 6125.52,
        "duration": 4.76
    },
    {
        "text": "my code here and let me do this I'm",
        "start": 6127.599,
        "duration": 5.0
    },
    {
        "text": "going to go ahead and call re not search",
        "start": 6130.28,
        "duration": 5.319
    },
    {
        "text": "but re.sub for substitute I'm going to",
        "start": 6132.599,
        "duration": 5.761
    },
    {
        "text": "pass in the following regular expression",
        "start": 6135.599,
        "duration": 4.281
    },
    {
        "text": "https",
        "start": 6138.36,
        "duration": 3.52
    },
    {
        "text": "col",
        "start": 6139.88,
        "duration": 4.52
    },
    {
        "text": "twitter.com uh slash and then I'm going",
        "start": 6141.88,
        "duration": 4.68
    },
    {
        "text": "to close my quote and now what do I want",
        "start": 6144.4,
        "duration": 4.799
    },
    {
        "text": "to replace that with well like before",
        "start": 6146.56,
        "duration": 4.88
    },
    {
        "text": "with the simple stir replace function I",
        "start": 6149.199,
        "duration": 3.641
    },
    {
        "text": "want to replace it with nothing just get",
        "start": 6151.44,
        "duration": 4.08
    },
    {
        "text": "rid of it all together but what uh",
        "start": 6152.84,
        "duration": 4.279
    },
    {
        "text": "string do I want to pass in to do this",
        "start": 6155.52,
        "duration": 5.4
    },
    {
        "text": "to the URL from the user and now let me",
        "start": 6157.119,
        "duration": 6.241
    },
    {
        "text": "go ahead and assign the return value of",
        "start": 6160.92,
        "duration": 5.279
    },
    {
        "text": "re sub to a variable called username so",
        "start": 6163.36,
        "duration": 5.239
    },
    {
        "text": "re sub's purpose in life is again to",
        "start": 6166.199,
        "duration": 5.0
    },
    {
        "text": "substitute some value for some regular",
        "start": 6168.599,
        "duration": 3.921
    },
    {
        "text": "expression some number of times it",
        "start": 6171.199,
        "duration": 3.801
    },
    {
        "text": "essentially is find and replace using",
        "start": 6172.52,
        "duration": 4.719
    },
    {
        "text": "regular expressions and it returns to",
        "start": 6175.0,
        "duration": 4.52
    },
    {
        "text": "you the resulting string once you've",
        "start": 6177.239,
        "duration": 4.681
    },
    {
        "text": "done all those substitutions so now the",
        "start": 6179.52,
        "duration": 3.84
    },
    {
        "text": "very last line of my code can be the",
        "start": 6181.92,
        "duration": 3.799
    },
    {
        "text": "same as before print and I'll use an F",
        "start": 6183.36,
        "duration": 4.92
    },
    {
        "text": "string username colon and then in curly",
        "start": 6185.719,
        "duration": 4.561
    },
    {
        "text": "braces username so I can print out",
        "start": 6188.28,
        "duration": 4.959
    },
    {
        "text": "literally just that all right let's try",
        "start": 6190.28,
        "duration": 4.359
    },
    {
        "text": "this and see what happens I'll clear my",
        "start": 6193.239,
        "duration": 4.201
    },
    {
        "text": "terminal window run python of twitter.",
        "start": 6194.639,
        "duration": 4.881
    },
    {
        "text": "and here we go https",
        "start": 6197.44,
        "duration": 3.64
    },
    {
        "text": "col",
        "start": 6199.52,
        "duration": 4.24
    },
    {
        "text": "twitter.com davidj Ma",
        "start": 6201.08,
        "duration": 6.159
    },
    {
        "text": "cross my fingers and hit enter okay now",
        "start": 6203.76,
        "duration": 5.64
    },
    {
        "text": "we're in business but it is still a",
        "start": 6207.239,
        "duration": 4.96
    },
    {
        "text": "little fragile and so let me ask the",
        "start": 6209.4,
        "duration": 5.759
    },
    {
        "text": "group what problem should I now further",
        "start": 6212.199,
        "duration": 4.92
    },
    {
        "text": "chip away at they've been said before",
        "start": 6215.159,
        "duration": 3.56
    },
    {
        "text": "but let's be clear what's one or more",
        "start": 6217.119,
        "duration": 4.241
    },
    {
        "text": "problems that still remain the protocols",
        "start": 6218.719,
        "duration": 6.801
    },
    {
        "text": "and the uh domain prefixes for good the",
        "start": 6221.36,
        "duration": 7.04
    },
    {
        "text": "protocol so HTTP versus https maybe the",
        "start": 6225.52,
        "duration": 6.56
    },
    {
        "text": "subdomain www should it be there or not",
        "start": 6228.4,
        "duration": 5.48
    },
    {
        "text": "and there's a few other mistakes here",
        "start": 6232.08,
        "duration": 3.639
    },
    {
        "text": "too let me actually stay with the group",
        "start": 6233.88,
        "duration": 3.68
    },
    {
        "text": "what are some other shortcomings of this",
        "start": 6235.719,
        "duration": 6.081
    },
    {
        "text": "current solution um if we use a phrase",
        "start": 6237.56,
        "duration": 6.8
    },
    {
        "text": "like you do before we are going to have",
        "start": 6241.8,
        "duration": 5.72
    },
    {
        "text": "the same problem because it's not taken",
        "start": 6244.36,
        "duration": 6.0
    },
    {
        "text": "account in the first part of the the",
        "start": 6247.52,
        "duration": 5.48
    },
    {
        "text": "text symbol good I might still allow for",
        "start": 6250.36,
        "duration": 4.96
    },
    {
        "text": "like some words uh some English to the",
        "start": 6253.0,
        "duration": 3.84
    },
    {
        "text": "left of the URL because I didn't use",
        "start": 6255.32,
        "duration": 3.56
    },
    {
        "text": "like my carrot symbol so I'll fix that",
        "start": 6256.84,
        "duration": 3.6
    },
    {
        "text": "and any final observations on",
        "start": 6258.88,
        "duration": 4.759
    },
    {
        "text": "shortcomings here uh well the could be a",
        "start": 6260.44,
        "duration": 5.84
    },
    {
        "text": "HTTP or there could be like less than",
        "start": 6263.639,
        "duration": 4.96
    },
    {
        "text": "two slashes okay so it could be HTTP and",
        "start": 6266.28,
        "duration": 3.439
    },
    {
        "text": "I think that was mentioned too in terms",
        "start": 6268.599,
        "duration": 2.841
    },
    {
        "text": "of protocol there could be fewer than",
        "start": 6269.719,
        "duration": 4.44
    },
    {
        "text": "two slashes that I'm not going to worry",
        "start": 6271.44,
        "duration": 4.88
    },
    {
        "text": "about if the user gives me one slash",
        "start": 6274.159,
        "duration": 4.48
    },
    {
        "text": "instead of two that's really user error",
        "start": 6276.32,
        "duration": 4.2
    },
    {
        "text": "and I could be tolerant of it but you",
        "start": 6278.639,
        "duration": 4.281
    },
    {
        "text": "know what at that point I'm okay yelling",
        "start": 6280.52,
        "duration": 3.92
    },
    {
        "text": "at them with an error message saying",
        "start": 6282.92,
        "duration": 3.08
    },
    {
        "text": "please fix your input otherwise we could",
        "start": 6284.44,
        "duration": 3.08
    },
    {
        "text": "be here all day long trying to handle",
        "start": 6286.0,
        "duration": 4.159
    },
    {
        "text": "all possible typos for now I think in",
        "start": 6287.52,
        "duration": 4.92
    },
    {
        "text": "the interest of usability or user",
        "start": 6290.159,
        "duration": 4.921
    },
    {
        "text": "experience ux let's at least be tolerant",
        "start": 6292.44,
        "duration": 5.0
    },
    {
        "text": "of all possible valid inputs or",
        "start": 6295.08,
        "duration": 4.519
    },
    {
        "text": "reasonable inputs if you will so let me",
        "start": 6297.44,
        "duration": 3.84
    },
    {
        "text": "go here and let me start chipping away",
        "start": 6299.599,
        "duration": 3.321
    },
    {
        "text": "at these here what are some problems we",
        "start": 6301.28,
        "duration": 5.359
    },
    {
        "text": "can solve well let me propose that we",
        "start": 6302.92,
        "duration": 5.88
    },
    {
        "text": "first address the issue of matching from",
        "start": 6306.639,
        "duration": 3.721
    },
    {
        "text": "the beginning of the string so let me",
        "start": 6308.8,
        "duration": 3.72
    },
    {
        "text": "add the carrot to the beginning and let",
        "start": 6310.36,
        "duration": 4.92
    },
    {
        "text": "me add not a dollar sign at the end",
        "start": 6312.52,
        "duration": 3.84
    },
    {
        "text": "though right because I don't want to",
        "start": 6315.28,
        "duration": 2.56
    },
    {
        "text": "match all the way to the end because I",
        "start": 6316.36,
        "duration": 3.799
    },
    {
        "text": "want to tolerate a username there so I",
        "start": 6317.84,
        "duration": 4.839
    },
    {
        "text": "think we just want the carrot symbol",
        "start": 6320.159,
        "duration": 4.921
    },
    {
        "text": "there there's a subtle bug that no one",
        "start": 6322.679,
        "duration": 4.48
    },
    {
        "text": "yet mentioned and let me just kind of",
        "start": 6325.08,
        "duration": 5.0
    },
    {
        "text": "highlight it and see if it jumps out at",
        "start": 6327.159,
        "duration": 4.921
    },
    {
        "text": "you now it's a little subtle here on my",
        "start": 6330.08,
        "duration": 6.119
    },
    {
        "text": "screen I've highlighted in blue a final",
        "start": 6332.08,
        "duration": 7.44
    },
    {
        "text": "bug here maybe some Smiles on the screen",
        "start": 6336.199,
        "duration": 6.801
    },
    {
        "text": "yeah can we take one hand here why am I",
        "start": 6339.52,
        "duration": 6.36
    },
    {
        "text": "highlighting the dot in twitter.com even",
        "start": 6343.0,
        "duration": 5.28
    },
    {
        "text": "though it definitely should be there so",
        "start": 6345.88,
        "duration": 5.4
    },
    {
        "text": "the dot without a backlash mean any c is",
        "start": 6348.28,
        "duration": 5.879
    },
    {
        "text": "up a new line yeah exactly it's not it's",
        "start": 6351.28,
        "duration": 5.0
    },
    {
        "text": "means any character so I could type in",
        "start": 6354.159,
        "duration": 5.52
    },
    {
        "text": "something like Twitter uh question markc",
        "start": 6356.28,
        "duration": 6.0
    },
    {
        "text": "or Twitter anything C and that would",
        "start": 6359.679,
        "duration": 5.0
    },
    {
        "text": "actually be tolerated it's not really",
        "start": 6362.28,
        "duration": 4.839
    },
    {
        "text": "that bad cuz why would the user do that",
        "start": 6364.679,
        "duration": 4.48
    },
    {
        "text": "but if I want to be correct and I want",
        "start": 6367.119,
        "duration": 4.681
    },
    {
        "text": "to be able to test my own code properly",
        "start": 6369.159,
        "duration": 4.201
    },
    {
        "text": "I should really get this detail right so",
        "start": 6371.8,
        "duration": 3.64
    },
    {
        "text": "that's an easy fix too but it's a common",
        "start": 6373.36,
        "duration": 3.96
    },
    {
        "text": "mistake anytime you're writing regular",
        "start": 6375.44,
        "duration": 3.719
    },
    {
        "text": "Expressions that happen to involve",
        "start": 6377.32,
        "duration": 5.0
    },
    {
        "text": "special symbols like dots in a URL or",
        "start": 6379.159,
        "duration": 5.48
    },
    {
        "text": "domain name a dollar sign in something",
        "start": 6382.32,
        "duration": 4.48
    },
    {
        "text": "involving currency remember you might",
        "start": 6384.639,
        "duration": 4.121
    },
    {
        "text": "indeed Need to Escape it with a",
        "start": 6386.8,
        "duration": 4.12
    },
    {
        "text": "backslash like this here all right let",
        "start": 6388.76,
        "duration": 4.399
    },
    {
        "text": "me ask the group about the protocol",
        "start": 6390.92,
        "duration": 5.08
    },
    {
        "text": "specifically https is a good thing in",
        "start": 6393.159,
        "duration": 4.881
    },
    {
        "text": "the world it means secure there is",
        "start": 6396.0,
        "duration": 4.199
    },
    {
        "text": "encryption being used so generally you",
        "start": 6398.04,
        "duration": 4.599
    },
    {
        "text": "like to see https but you still see",
        "start": 6400.199,
        "duration": 6.4
    },
    {
        "text": "people typing or copy pasting HTTP what",
        "start": 6402.639,
        "duration": 6.52
    },
    {
        "text": "would be the simplest fix here to",
        "start": 6406.599,
        "duration": 6.08
    },
    {
        "text": "tolerate as has been proposed both HTTP",
        "start": 6409.159,
        "duration": 6.601
    },
    {
        "text": "and and https I'm going to propose that",
        "start": 6412.679,
        "duration": 5.841
    },
    {
        "text": "I could do this I could do HTTP vertical",
        "start": 6415.76,
        "duration": 6.919
    },
    {
        "text": "bar or https which again Means A or B",
        "start": 6418.52,
        "duration": 6.04
    },
    {
        "text": "but I think I can be smarter than that I",
        "start": 6422.679,
        "duration": 4.201
    },
    {
        "text": "can keep my code a little more succinct",
        "start": 6424.56,
        "duration": 4.84
    },
    {
        "text": "any recommendations here for",
        "start": 6426.88,
        "duration": 5.56
    },
    {
        "text": "tolerating HTTP or",
        "start": 6429.4,
        "duration": 6.04
    },
    {
        "text": "https we could try to put an question",
        "start": 6432.44,
        "duration": 5.719
    },
    {
        "text": "mark behind the S perfect just use a",
        "start": 6435.44,
        "duration": 4.44
    },
    {
        "text": "question mark right like both of those",
        "start": 6438.159,
        "duration": 3.241
    },
    {
        "text": "would be viable Solutions if you want to",
        "start": 6439.88,
        "duration": 3.719
    },
    {
        "text": "be super explicit in your code fine use",
        "start": 6441.4,
        "duration": 5.6
    },
    {
        "text": "parenthesis and say HTTP or https so",
        "start": 6443.599,
        "duration": 5.241
    },
    {
        "text": "that you the reader your boss your",
        "start": 6447.0,
        "duration": 3.679
    },
    {
        "text": "teacher just know exactly what you're",
        "start": 6448.84,
        "duration": 4.24
    },
    {
        "text": "doing but you know if you keep taking",
        "start": 6450.679,
        "duration": 4.081
    },
    {
        "text": "the more of verbose approach all the",
        "start": 6453.08,
        "duration": 3.32
    },
    {
        "text": "time it might actually become less",
        "start": 6454.76,
        "duration": 3.52
    },
    {
        "text": "readable certainly once your regular",
        "start": 6456.4,
        "duration": 3.799
    },
    {
        "text": "Expressions get this big instead of this",
        "start": 6458.28,
        "duration": 4.16
    },
    {
        "text": "big so let's save space where we can and",
        "start": 6460.199,
        "duration": 3.761
    },
    {
        "text": "I would argue that this is pretty",
        "start": 6462.44,
        "duration": 3.32
    },
    {
        "text": "reasonable so long as you're in the",
        "start": 6463.96,
        "duration": 3.639
    },
    {
        "text": "habits of reading regular expressions",
        "start": 6465.76,
        "duration": 3.28
    },
    {
        "text": "and know that question mark does not",
        "start": 6467.599,
        "duration": 3.0
    },
    {
        "text": "mean a literal question mark but it",
        "start": 6469.04,
        "duration": 4.159
    },
    {
        "text": "means zero or one of the thing before I",
        "start": 6470.599,
        "duration": 4.761
    },
    {
        "text": "think we've effectively made the S",
        "start": 6473.199,
        "duration": 5.081
    },
    {
        "text": "optional here now what else can I do",
        "start": 6475.36,
        "duration": 6.08
    },
    {
        "text": "well suppose we want to tolerate the www",
        "start": 6478.28,
        "duration": 5.72
    },
    {
        "text": "dot which may or may not be there uh but",
        "start": 6481.44,
        "duration": 4.759
    },
    {
        "text": "it will work if you go to a browser I",
        "start": 6484.0,
        "duration": 4.52
    },
    {
        "text": "could do this",
        "start": 6486.199,
        "duration": 5.201
    },
    {
        "text": "www. uh wait I want a backslash there so",
        "start": 6488.52,
        "duration": 4.24
    },
    {
        "text": "I don't repeat the same mistake as",
        "start": 6491.4,
        "duration": 3.44
    },
    {
        "text": "before but this is no good either",
        "start": 6492.76,
        "duration": 5.359
    },
    {
        "text": "because I want to tolerate www being",
        "start": 6494.84,
        "duration": 5.48
    },
    {
        "text": "there or not being there and now I've",
        "start": 6498.119,
        "duration": 4.04
    },
    {
        "text": "just required that it be there but I",
        "start": 6500.32,
        "duration": 4.44
    },
    {
        "text": "think I can take same approach any",
        "start": 6502.159,
        "duration": 5.401
    },
    {
        "text": "recommendations how do I make the www do",
        "start": 6504.76,
        "duration": 5.879
    },
    {
        "text": "optional just to hammer this home we can",
        "start": 6507.56,
        "duration": 6.72
    },
    {
        "text": "like group uh make a square",
        "start": 6510.639,
        "duration": 6.56
    },
    {
        "text": "and question mark perfect so question",
        "start": 6514.28,
        "duration": 5.0
    },
    {
        "text": "mark is the short answer again but we",
        "start": 6517.199,
        "duration": 3.48
    },
    {
        "text": "have to be a little smarter this time as",
        "start": 6519.28,
        "duration": 3.839
    },
    {
        "text": "Maria's noted we need parentheses now",
        "start": 6520.679,
        "duration": 4.401
    },
    {
        "text": "because if I just put a question mark",
        "start": 6523.119,
        "duration": 4.681
    },
    {
        "text": "after the dot that just means the dot is",
        "start": 6525.08,
        "duration": 4.28
    },
    {
        "text": "optional and that's wrong because we",
        "start": 6527.8,
        "duration": 5.0
    },
    {
        "text": "don't want the user to type in wwwt w i",
        "start": 6529.36,
        "duration": 6.16
    },
    {
        "text": "TT e r we want the dot to be there or",
        "start": 6532.8,
        "duration": 5.2
    },
    {
        "text": "just not at all with no www so we need",
        "start": 6535.52,
        "duration": 4.76
    },
    {
        "text": "to group this whole thing together put a",
        "start": 6538.0,
        "duration": 4.56
    },
    {
        "text": "parenthesis there and then a parenthesis",
        "start": 6540.28,
        "duration": 5.839
    },
    {
        "text": "not after the third W after the dot so",
        "start": 6542.56,
        "duration": 6.2
    },
    {
        "text": "that that whole thing is either there or",
        "start": 6546.119,
        "duration": 5.161
    },
    {
        "text": "it's not there and what else could we",
        "start": 6548.76,
        "duration": 4.2
    },
    {
        "text": "still do here you know there's going to",
        "start": 6551.28,
        "duration": 3.24
    },
    {
        "text": "be one other thing we should tolerate",
        "start": 6552.96,
        "duration": 2.92
    },
    {
        "text": "and it's been said before and I'll pluck",
        "start": 6554.52,
        "duration": 3.76
    },
    {
        "text": "this one off what about the protocol",
        "start": 6555.88,
        "duration": 4.08
    },
    {
        "text": "like what if the user just doesn't type",
        "start": 6558.28,
        "duration": 4.879
    },
    {
        "text": "or doesn't copy paste the HTTP colon SL",
        "start": 6559.96,
        "duration": 6.679
    },
    {
        "text": "slash or an htps colon slash right",
        "start": 6563.159,
        "duration": 5.281
    },
    {
        "text": "honestly you and I are not in the habit",
        "start": 6566.639,
        "duration": 3.881
    },
    {
        "text": "generally of even typing the protocol",
        "start": 6568.44,
        "duration": 3.88
    },
    {
        "text": "anymore nowadays you just let the",
        "start": 6570.52,
        "duration": 3.56
    },
    {
        "text": "browser figure it out for you and",
        "start": 6572.32,
        "duration": 4.799
    },
    {
        "text": "automatically add it instead so this",
        "start": 6574.08,
        "duration": 4.2
    },
    {
        "text": "one's going to look like more of a",
        "start": 6577.119,
        "duration": 3.681
    },
    {
        "text": "mouthful but if I want this whole thing",
        "start": 6578.28,
        "duration": 5.439
    },
    {
        "text": "here in blue to be optional it's",
        "start": 6580.8,
        "duration": 4.76
    },
    {
        "text": "actually the same solution as Maria",
        "start": 6583.719,
        "duration": 3.681
    },
    {
        "text": "offered a moment ago I'm going to go",
        "start": 6585.56,
        "duration": 4.039
    },
    {
        "text": "ahead and put a parenthesis over here",
        "start": 6587.4,
        "duration": 4.64
    },
    {
        "text": "and a parenthesis after the two slashes",
        "start": 6589.599,
        "duration": 3.681
    },
    {
        "text": "and then",
        "start": 6592.04,
        "duration": 3.48
    },
    {
        "text": "a question mark so it's to make that",
        "start": 6593.28,
        "duration": 4.439
    },
    {
        "text": "whole thing optional as well and this is",
        "start": 6595.52,
        "duration": 4.719
    },
    {
        "text": "okay it's totally fine to make this",
        "start": 6597.719,
        "duration": 5.681
    },
    {
        "text": "whole thing optional or inside of it",
        "start": 6600.239,
        "duration": 5.761
    },
    {
        "text": "this little thing just the S optional as",
        "start": 6603.4,
        "duration": 4.56
    },
    {
        "text": "well so long as I'm applying the same",
        "start": 6606.0,
        "duration": 3.76
    },
    {
        "text": "principles again and again either on a",
        "start": 6607.96,
        "duration": 3.759
    },
    {
        "text": "small scale or a bigger scale it's",
        "start": 6609.76,
        "duration": 5.08
    },
    {
        "text": "totally fine to Nest one of these inside",
        "start": 6611.719,
        "duration": 4.161
    },
    {
        "text": "of the",
        "start": 6614.84,
        "duration": 4.879
    },
    {
        "text": "other questions now on any of these",
        "start": 6615.88,
        "duration": 6.12
    },
    {
        "text": "refinements to this parsing this",
        "start": 6619.719,
        "duration": 5.44
    },
    {
        "text": "analyzing of Twitter what if we put a",
        "start": 6622.0,
        "duration": 7.84
    },
    {
        "text": "vertical bar besides this www do what if",
        "start": 6625.159,
        "duration": 7.08
    },
    {
        "text": "we use a a vertical bar there so we",
        "start": 6629.84,
        "duration": 4.319
    },
    {
        "text": "could do something like that too we",
        "start": 6632.239,
        "duration": 4.841
    },
    {
        "text": "could do something like this uh instead",
        "start": 6634.159,
        "duration": 6.56
    },
    {
        "text": "of the question mark I could do www. or",
        "start": 6637.08,
        "duration": 5.76
    },
    {
        "text": "nothing and just leave that in the",
        "start": 6640.719,
        "duration": 4.641
    },
    {
        "text": "parenthesis that too would be fine I",
        "start": 6642.84,
        "duration": 3.92
    },
    {
        "text": "personally tend not to like that because",
        "start": 6645.36,
        "duration": 3.279
    },
    {
        "text": "it's a little less obvious to me wait a",
        "start": 6646.76,
        "duration": 3.359
    },
    {
        "text": "minute is that deliberate or did I",
        "start": 6648.639,
        "duration": 3.241
    },
    {
        "text": "forget to finish my thought by putting",
        "start": 6650.119,
        "duration": 3.681
    },
    {
        "text": "something after the vertical bar but",
        "start": 6651.88,
        "duration": 4.48
    },
    {
        "text": "that too would be allowed there as well",
        "start": 6653.8,
        "duration": 4.68
    },
    {
        "text": "if that's what you mean other questions",
        "start": 6656.36,
        "duration": 3.719
    },
    {
        "text": "on where we left things here where we",
        "start": 6658.48,
        "duration": 5.4
    },
    {
        "text": "made the protocol optional too what",
        "start": 6660.079,
        "duration": 7.481
    },
    {
        "text": "coulden if we have parenthesis and",
        "start": 6663.88,
        "duration": 5.279
    },
    {
        "text": "inside we have another parenthesis and",
        "start": 6667.56,
        "duration": 3.559
    },
    {
        "text": "another parenthesis interfere with each",
        "start": 6669.159,
        "duration": 3.761
    },
    {
        "text": "other if you have parentheses inside of",
        "start": 6671.119,
        "duration": 4.641
    },
    {
        "text": "parenthesis that too is totally fine and",
        "start": 6672.92,
        "duration": 5.08
    },
    {
        "text": "indeed that should be one of the",
        "start": 6675.76,
        "duration": 5.08
    },
    {
        "text": "reassuring lessons today as complicated",
        "start": 6678.0,
        "duration": 4.4
    },
    {
        "text": "as each of these regular Expressions as",
        "start": 6680.84,
        "duration": 3.759
    },
    {
        "text": "it admittedly gotten I'm just applying",
        "start": 6682.4,
        "duration": 4.16
    },
    {
        "text": "the exact same principles and the exact",
        "start": 6684.599,
        "duration": 4.921
    },
    {
        "text": "same syntax again and again so it's",
        "start": 6686.56,
        "duration": 4.72
    },
    {
        "text": "totally fine to have parenthesis inside",
        "start": 6689.52,
        "duration": 3.28
    },
    {
        "text": "of parentheses if they're each solving",
        "start": 6691.28,
        "duration": 3.28
    },
    {
        "text": "different problems and in fact the",
        "start": 6692.8,
        "duration": 3.96
    },
    {
        "text": "lesson I would really emphasize the most",
        "start": 6694.56,
        "duration": 5.44
    },
    {
        "text": "today is that you will not be happy if",
        "start": 6696.76,
        "duration": 6.08
    },
    {
        "text": "you try to write out a whole complicated",
        "start": 6700.0,
        "duration": 5.0
    },
    {
        "text": "regular expression all at once like if",
        "start": 6702.84,
        "duration": 4.399
    },
    {
        "text": "you're anything like me you will fail",
        "start": 6705.0,
        "duration": 4.0
    },
    {
        "text": "and you will have trouble finding the",
        "start": 6707.239,
        "duration": 3.281
    },
    {
        "text": "mistake because my God look at these",
        "start": 6709.0,
        "duration": 3.639
    },
    {
        "text": "things they are even to me all these",
        "start": 6710.52,
        "duration": 4.48
    },
    {
        "text": "years later cryptic the better way I",
        "start": 6712.639,
        "duration": 4.0
    },
    {
        "text": "would argue whether you're new to",
        "start": 6715.0,
        "duration": 4.079
    },
    {
        "text": "programming or as old to it as I am is",
        "start": 6716.639,
        "duration": 5.0
    },
    {
        "text": "to just take these baby steps these",
        "start": 6719.079,
        "duration": 4.08
    },
    {
        "text": "incremental steps where you do something",
        "start": 6721.639,
        "duration": 3.401
    },
    {
        "text": "simple you make sure it works you add",
        "start": 6723.159,
        "duration": 4.121
    },
    {
        "text": "one more feature make sure it works add",
        "start": 6725.04,
        "duration": 4.28
    },
    {
        "text": "one more feature make sure it works and",
        "start": 6727.28,
        "duration": 3.52
    },
    {
        "text": "hopefully by the end because you've done",
        "start": 6729.32,
        "duration": 4.0
    },
    {
        "text": "each of those steps one at a time the",
        "start": 6730.8,
        "duration": 4.799
    },
    {
        "text": "whole thing will make sense to you but",
        "start": 6733.32,
        "duration": 3.96
    },
    {
        "text": "you'll also have gotten each of those",
        "start": 6735.599,
        "duration": 5.761
    },
    {
        "text": "steps correct um at each turn so please",
        "start": 6737.28,
        "duration": 6.959
    },
    {
        "text": "do avoid the inclination to try to come",
        "start": 6741.36,
        "duration": 4.64
    },
    {
        "text": "up with long sophisticated regular",
        "start": 6744.239,
        "duration": 3.4
    },
    {
        "text": "Expressions all at once because it's",
        "start": 6746.0,
        "duration": 3.8
    },
    {
        "text": "just not a good use of a time if you",
        "start": 6747.639,
        "duration": 3.52
    },
    {
        "text": "then stare at it trying to find a",
        "start": 6749.8,
        "duration": 3.0
    },
    {
        "text": "mistake that you could have caught if",
        "start": 6751.159,
        "duration": 3.361
    },
    {
        "text": "you did things more incrementally",
        "start": 6752.8,
        "duration": 3.64
    },
    {
        "text": "instead all right there Still Remains",
        "start": 6754.52,
        "duration": 4.0
    },
    {
        "text": "arguably at least one problem with this",
        "start": 6756.44,
        "duration": 3.84
    },
    {
        "text": "solution in that even though I'm calling",
        "start": 6758.52,
        "duration": 5.04
    },
    {
        "text": "re.sub to substitute the URL with",
        "start": 6760.28,
        "duration": 6.0
    },
    {
        "text": "nothing quote unquote I then on my final",
        "start": 6763.56,
        "duration": 4.599
    },
    {
        "text": "line of code line six I'm just blindly",
        "start": 6766.28,
        "duration": 3.68
    },
    {
        "text": "assuming that it all worked and I'm",
        "start": 6768.159,
        "duration": 3.321
    },
    {
        "text": "going to go ahead and print out the",
        "start": 6769.96,
        "duration": 3.96
    },
    {
        "text": "username but what if the user if I clear",
        "start": 6771.48,
        "duration": 3.88
    },
    {
        "text": "my screen here and run python of",
        "start": 6773.92,
        "duration": 4.159
    },
    {
        "text": "twitter. doesn't even type a Twitter URL",
        "start": 6775.36,
        "duration": 4.4
    },
    {
        "text": "what if they do something like",
        "start": 6778.079,
        "duration": 3.761
    },
    {
        "text": "https",
        "start": 6779.76,
        "duration": 4.04
    },
    {
        "text": "www.google.com like completely",
        "start": 6781.84,
        "duration": 5.44
    },
    {
        "text": "unrelatedly for whatever reason enter",
        "start": 6783.8,
        "duration": 5.52
    },
    {
        "text": "that is not their Twitter username so we",
        "start": 6787.28,
        "duration": 4.359
    },
    {
        "text": "need to have some conditional logic I",
        "start": 6789.32,
        "duration": 4.44
    },
    {
        "text": "would argue so that for this program's",
        "start": 6791.639,
        "duration": 5.0
    },
    {
        "text": "sake we're only printing out or in a",
        "start": 6793.76,
        "duration": 4.76
    },
    {
        "text": "backend system we're only saving into",
        "start": 6796.639,
        "duration": 4.56
    },
    {
        "text": "our database or a CSV file the username",
        "start": 6798.52,
        "duration": 4.96
    },
    {
        "text": "if we actually match matched the proper",
        "start": 6801.199,
        "duration": 5.681
    },
    {
        "text": "pattern so rather than use re.sub which",
        "start": 6803.48,
        "duration": 6.08
    },
    {
        "text": "is useful for cleaning up data as we've",
        "start": 6806.88,
        "duration": 4.4
    },
    {
        "text": "done here to get rid of something we",
        "start": 6809.56,
        "duration": 4.24
    },
    {
        "text": "don't want there why don't we go back to",
        "start": 6811.28,
        "duration": 6.56
    },
    {
        "text": "re. search where we began today and use",
        "start": 6813.8,
        "duration": 6.12
    },
    {
        "text": "it to solve the same problem but in a",
        "start": 6817.84,
        "duration": 4.04
    },
    {
        "text": "way that's conditional whereby I can",
        "start": 6819.92,
        "duration": 3.84
    },
    {
        "text": "confidently say yes or no at the end of",
        "start": 6821.88,
        "duration": 4.4
    },
    {
        "text": "my program here's the username or here",
        "start": 6823.76,
        "duration": 4.56
    },
    {
        "text": "it is not so let me go ahead now and",
        "start": 6826.28,
        "duration": 4.16
    },
    {
        "text": "I'll clear my terminal window here I'm",
        "start": 6828.32,
        "duration": 4.399
    },
    {
        "text": "going to keep most of uh the I'm going",
        "start": 6830.44,
        "duration": 4.12
    },
    {
        "text": "to keep the first two lines the same",
        "start": 6832.719,
        "duration": 4.081
    },
    {
        "text": "where I import re and I get the URL from",
        "start": 6834.56,
        "duration": 4.519
    },
    {
        "text": "the user but this time let's do this",
        "start": 6836.8,
        "duration": 5.12
    },
    {
        "text": "let's this time search for using re.",
        "start": 6839.079,
        "duration": 5.401
    },
    {
        "text": "search instead of re.sub the following",
        "start": 6841.92,
        "duration": 3.799
    },
    {
        "text": "I'm going to start matching at the",
        "start": 6844.48,
        "duration": 3.88
    },
    {
        "text": "beginning of the UR of the string",
        "start": 6845.719,
        "duration": 5.121
    },
    {
        "text": "https uh question mark to make the S",
        "start": 6848.36,
        "duration": 5.12
    },
    {
        "text": "optional colon SL slash then I'm going",
        "start": 6850.84,
        "duration": 4.96
    },
    {
        "text": "to make my uh",
        "start": 6853.48,
        "duration": 5.08
    },
    {
        "text": "www uh optional by putting that in",
        "start": 6855.8,
        "duration": 5.399
    },
    {
        "text": "question marks there then a twitter.com",
        "start": 6858.56,
        "duration": 4.599
    },
    {
        "text": "with a literal do there so I'll stay",
        "start": 6861.199,
        "duration": 5.4
    },
    {
        "text": "ahead of that issue too then a slash and",
        "start": 6863.159,
        "duration": 5.841
    },
    {
        "text": "then well this is where David J ma is",
        "start": 6866.599,
        "duration": 5.201
    },
    {
        "text": "supposed to go how do I detect this well",
        "start": 6869.0,
        "duration": 4.36
    },
    {
        "text": "I think I'll just tolerate anything at",
        "start": 6871.8,
        "duration": 4.6
    },
    {
        "text": "the end of the URL here all right dollar",
        "start": 6873.36,
        "duration": 5.68
    },
    {
        "text": "sign at the very end close quote for the",
        "start": 6876.4,
        "duration": 4.08
    },
    {
        "text": "moment I'm going to stipulate that we're",
        "start": 6879.04,
        "duration": 3.159
    },
    {
        "text": "not going to worry about question marks",
        "start": 6880.48,
        "duration": 4.0
    },
    {
        "text": "at the end or hashes like for fragment",
        "start": 6882.199,
        "duration": 4.241
    },
    {
        "text": "IDs and URLs we're going to assume for",
        "start": 6884.48,
        "duration": 4.4
    },
    {
        "text": "Simplicity now that the URL just ends",
        "start": 6886.44,
        "duration": 5.08
    },
    {
        "text": "with the username alone now what am I",
        "start": 6888.88,
        "duration": 4.319
    },
    {
        "text": "going to do well I want search for this",
        "start": 6891.52,
        "duration": 3.52
    },
    {
        "text": "URL specifically and I'm going to ignore",
        "start": 6893.199,
        "duration": 5.52
    },
    {
        "text": "case so re. ignore case uh applying that",
        "start": 6895.04,
        "duration": 6.52
    },
    {
        "text": "same lesson learned from before re.",
        "start": 6898.719,
        "duration": 5.641
    },
    {
        "text": "search recall will return to you the",
        "start": 6901.56,
        "duration": 4.519
    },
    {
        "text": "matches you've captured well what do I",
        "start": 6904.36,
        "duration": 3.719
    },
    {
        "text": "want to capture well I want to capture",
        "start": 6906.079,
        "duration": 4.481
    },
    {
        "text": "everything to the right of the",
        "start": 6908.079,
        "duration": 5.56
    },
    {
        "text": "twitter.com URL here so let me surround",
        "start": 6910.56,
        "duration": 6.039
    },
    {
        "text": "what should be the user's username with",
        "start": 6913.639,
        "duration": 5.44
    },
    {
        "text": "parentheses not for making them optional",
        "start": 6916.599,
        "duration": 4.201
    },
    {
        "text": "but to say capture this set of",
        "start": 6919.079,
        "duration": 4.801
    },
    {
        "text": "characters now are search recall returns",
        "start": 6920.8,
        "duration": 5.399
    },
    {
        "text": "and answer matches will be my variable",
        "start": 6923.88,
        "duration": 3.799
    },
    {
        "text": "name again but I could call it anything",
        "start": 6926.199,
        "duration": 5.52
    },
    {
        "text": "I want and then I can do this if matches",
        "start": 6927.679,
        "duration": 6.44
    },
    {
        "text": "now I know I can do this let's print out",
        "start": 6931.719,
        "duration": 5.36
    },
    {
        "text": "the format string username colon and",
        "start": 6934.119,
        "duration": 6.241
    },
    {
        "text": "then uh what do I want to print out well",
        "start": 6937.079,
        "duration": 5.361
    },
    {
        "text": "I think I want to print out matches.",
        "start": 6940.36,
        "duration": 5.56
    },
    {
        "text": "group one for my matched username all",
        "start": 6942.44,
        "duration": 5.6
    },
    {
        "text": "right so what am I doing just to recap",
        "start": 6945.92,
        "duration": 4.239
    },
    {
        "text": "line one I'm importing the library line",
        "start": 6948.04,
        "duration": 4.32
    },
    {
        "text": "two I'm getting the URL from the user so",
        "start": 6950.159,
        "duration": 4.881
    },
    {
        "text": "nothing new there line five I'm",
        "start": 6952.36,
        "duration": 5.92
    },
    {
        "text": "searching the user's URL as indicated",
        "start": 6955.04,
        "duration": 5.76
    },
    {
        "text": "here as the second argument for this",
        "start": 6958.28,
        "duration": 5.399
    },
    {
        "text": "regular expression this pattern I have",
        "start": 6960.8,
        "duration": 7.12
    },
    {
        "text": "surrounded the dot plus with parentheses",
        "start": 6963.679,
        "duration": 6.601
    },
    {
        "text": "so that they are captured ultimately so",
        "start": 6967.92,
        "duration": 5.12
    },
    {
        "text": "I can extract in this final scenario the",
        "start": 6970.28,
        "duration": 5.879
    },
    {
        "text": "user's username if I indeed got a match",
        "start": 6973.04,
        "duration": 6.4
    },
    {
        "text": "and matches is non none it is actually",
        "start": 6976.159,
        "duration": 5.801
    },
    {
        "text": "containing some match then and only then",
        "start": 6979.44,
        "duration": 5.159
    },
    {
        "text": "print out username in this way let me",
        "start": 6981.96,
        "duration": 5.279
    },
    {
        "text": "try this now if I run python of twitter.",
        "start": 6984.599,
        "duration": 5.841
    },
    {
        "text": "and type in HTTPS",
        "start": 6987.239,
        "duration": 6.081
    },
    {
        "text": "www.google.com now nothing gets printed",
        "start": 6990.44,
        "duration": 4.84
    },
    {
        "text": "so I've at least solved the mistake we",
        "start": 6993.32,
        "duration": 3.839
    },
    {
        "text": "just saw where I was just assuming that",
        "start": 6995.28,
        "duration": 4.399
    },
    {
        "text": "my code worked now I'm making sure that",
        "start": 6997.159,
        "duration": 4.801
    },
    {
        "text": "I have searched for and found the",
        "start": 6999.679,
        "duration": 5.121
    },
    {
        "text": "Twitter URL prefix all right well let's",
        "start": 7001.96,
        "duration": 6.639
    },
    {
        "text": "run this for real now python of twitter.",
        "start": 7004.8,
        "duration": 7.76
    },
    {
        "text": "https twitter.com davidj maen but note I",
        "start": 7008.599,
        "duration": 7.401
    },
    {
        "text": "could use HTTP I could use www I'm just",
        "start": 7012.56,
        "duration": 5.639
    },
    {
        "text": "going to go ahead here and hit",
        "start": 7016.0,
        "duration": 4.92
    },
    {
        "text": "enter huh",
        "start": 7018.199,
        "duration": 6.321
    },
    {
        "text": "none what has gone",
        "start": 7020.92,
        "duration": 6.279
    },
    {
        "text": "wrong this one's a bit more",
        "start": 7024.52,
        "duration": 6.92
    },
    {
        "text": "subtle but why does matches. group one",
        "start": 7027.199,
        "duration": 6.761
    },
    {
        "text": "contain nothing wait a minute let me",
        "start": 7031.44,
        "duration": 4.759
    },
    {
        "text": "maybe I maybe I did this wrong maybe",
        "start": 7033.96,
        "duration": 4.239
    },
    {
        "text": "maybe do we need the www let me run it",
        "start": 7036.199,
        "duration": 4.96
    },
    {
        "text": "again so here we go https let's add it",
        "start": 7038.199,
        "duration": 9.361
    },
    {
        "text": "www. twitter.com davidj maen all right",
        "start": 7041.159,
        "duration": 6.401
    },
    {
        "text": "enter what is going on we have to say",
        "start": 7047.88,
        "duration": 6.96
    },
    {
        "text": "group two I have to say group two well",
        "start": 7051.8,
        "duration": 5.319
    },
    {
        "text": "wait all right because we had the the",
        "start": 7054.84,
        "duration": 5.0
    },
    {
        "text": "subdomain was optional and to make it",
        "start": 7057.119,
        "duration": 4.96
    },
    {
        "text": "optional I needed to use parentheses",
        "start": 7059.84,
        "duration": 4.72
    },
    {
        "text": "here and so I then said zero or one okay",
        "start": 7062.079,
        "duration": 5.761
    },
    {
        "text": "so that means that actually I'm",
        "start": 7064.56,
        "duration": 5.92
    },
    {
        "text": "unintentionally but by Design capturing",
        "start": 7067.84,
        "duration": 5.48
    },
    {
        "text": "the www do or none of it if it wasn't",
        "start": 7070.48,
        "duration": 5.639
    },
    {
        "text": "there before but I have a second match",
        "start": 7073.32,
        "duration": 4.08
    },
    {
        "text": "over here because I have a second set of",
        "start": 7076.119,
        "duration": 2.96
    },
    {
        "text": "parentheses so I think yep let me change",
        "start": 7077.4,
        "duration": 4.04
    },
    {
        "text": "matches group one to matches group two",
        "start": 7079.079,
        "duration": 5.52
    },
    {
        "text": "and let's rerun this python of twitter.",
        "start": 7081.44,
        "duration": 7.639
    },
    {
        "text": "https www. Twitter let's do this uh",
        "start": 7084.599,
        "duration": 9.321
    },
    {
        "text": "twitter.com davidj maen enter and now",
        "start": 7089.079,
        "duration": 7.12
    },
    {
        "text": "we've got access to the username let me",
        "start": 7093.92,
        "duration": 4.199
    },
    {
        "text": "go ahead and tighten it up a little bit",
        "start": 7096.199,
        "duration": 5.241
    },
    {
        "text": "further uh if you like uh our new friend",
        "start": 7098.119,
        "duration": 4.881
    },
    {
        "text": "uh it's hard not to like if we like our",
        "start": 7101.44,
        "duration": 4.239
    },
    {
        "text": "old friend The Walrus uh operator let's",
        "start": 7103.0,
        "duration": 4.199
    },
    {
        "text": "go ahead and add this just to tighten",
        "start": 7105.679,
        "duration": 3.721
    },
    {
        "text": "things up let me go back to vs code here",
        "start": 7107.199,
        "duration": 3.96
    },
    {
        "text": "and let me get rid of the unnecessary",
        "start": 7109.4,
        "duration": 3.279
    },
    {
        "text": "condition there and combine it up here",
        "start": 7111.159,
        "duration": 4.321
    },
    {
        "text": "if matches equals that but let's change",
        "start": 7112.679,
        "duration": 4.321
    },
    {
        "text": "the single assignment operator to the",
        "start": 7115.48,
        "duration": 3.44
    },
    {
        "text": "Wallace operator now I've tightened",
        "start": 7117.0,
        "duration": 4.639
    },
    {
        "text": "things up further but I bet I bet I bet",
        "start": 7118.92,
        "duration": 5.279
    },
    {
        "text": "there might be another solution here and",
        "start": 7121.639,
        "duration": 5.641
    },
    {
        "text": "indeed it turns out that we can come",
        "start": 7124.199,
        "duration": 6.841
    },
    {
        "text": "back to this final set of syntax recall",
        "start": 7127.28,
        "duration": 4.879
    },
    {
        "text": "that when we introduced these",
        "start": 7131.04,
        "duration": 2.72
    },
    {
        "text": "parentheses we did it so that we could",
        "start": 7132.159,
        "duration": 4.201
    },
    {
        "text": "do a or b for instance with the vertical",
        "start": 7133.76,
        "duration": 4.16
    },
    {
        "text": "bar though you can even combine more",
        "start": 7136.36,
        "duration": 4.08
    },
    {
        "text": "than just one bar we used the group to",
        "start": 7137.92,
        "duration": 5.319
    },
    {
        "text": "combine ideas like the www dot and then",
        "start": 7140.44,
        "duration": 5.279
    },
    {
        "text": "there's this admittedly weird syntax at",
        "start": 7143.239,
        "duration": 5.561
    },
    {
        "text": "the bottom here up until now not used",
        "start": 7145.719,
        "duration": 5.761
    },
    {
        "text": "there is a non- capturing version of",
        "start": 7148.8,
        "duration": 4.08
    },
    {
        "text": "parentheses if you want to use",
        "start": 7151.48,
        "duration": 3.04
    },
    {
        "text": "parentheses logically because you need",
        "start": 7152.88,
        "duration": 3.88
    },
    {
        "text": "to but you don't want to bother",
        "start": 7154.52,
        "duration": 4.28
    },
    {
        "text": "capturing the result and this would",
        "start": 7156.76,
        "duration": 3.919
    },
    {
        "text": "arguably be a better solution here",
        "start": 7158.8,
        "duration": 4.799
    },
    {
        "text": "because yes if I go back to s code I do",
        "start": 7160.679,
        "duration": 5.761
    },
    {
        "text": "need to surround the www do with",
        "start": 7163.599,
        "duration": 4.681
    },
    {
        "text": "parentheses at least as I've written my",
        "start": 7166.44,
        "duration": 4.08
    },
    {
        "text": "Rex here because I wanted to put the",
        "start": 7168.28,
        "duration": 4.6
    },
    {
        "text": "question mark after it but I don't need",
        "start": 7170.52,
        "duration": 5.159
    },
    {
        "text": "the www dot coming back in fact let's",
        "start": 7172.88,
        "duration": 4.839
    },
    {
        "text": "only extract the data we care about just",
        "start": 7175.679,
        "duration": 3.96
    },
    {
        "text": "so there's no confusion down the road",
        "start": 7177.719,
        "duration": 4.44
    },
    {
        "text": "for me or my colleagues or my teachers",
        "start": 7179.639,
        "duration": 5.52
    },
    {
        "text": "so what could I do well the syntax per",
        "start": 7182.159,
        "duration": 5.52
    },
    {
        "text": "this slide is to use a question mark and",
        "start": 7185.159,
        "duration": 5.44
    },
    {
        "text": "a colon immediately after the open",
        "start": 7187.679,
        "duration": 5.321
    },
    {
        "text": "parenthesis it looks weird admittedly",
        "start": 7190.599,
        "duration": 4.0
    },
    {
        "text": "those of you who have prior programming",
        "start": 7193.0,
        "duration": 3.199
    },
    {
        "text": "experience might recognize the syntax",
        "start": 7194.599,
        "duration": 4.04
    },
    {
        "text": "from Turner operators doing an if else",
        "start": 7196.199,
        "duration": 5.721
    },
    {
        "text": "allinone line a question mark colon at",
        "start": 7198.639,
        "duration": 5.52
    },
    {
        "text": "the beginning of that parenthetical",
        "start": 7201.92,
        "duration": 5.159
    },
    {
        "text": "means yes I'm using parentheses to group",
        "start": 7204.159,
        "duration": 5.361
    },
    {
        "text": "these things together but no you do not",
        "start": 7207.079,
        "duration": 5.0
    },
    {
        "text": "need to capture them instead so I can",
        "start": 7209.52,
        "duration": 4.88
    },
    {
        "text": "change my code back now to matches.",
        "start": 7212.079,
        "duration": 4.721
    },
    {
        "text": "group one I'll clear my screen here run",
        "start": 7214.4,
        "duration": 5.719
    },
    {
        "text": "python of twitter. I'll again run here",
        "start": 7216.8,
        "duration": 4.16
    },
    {
        "text": "uh",
        "start": 7220.119,
        "duration": 4.761
    },
    {
        "text": "https twitter.com davidj maen with or",
        "start": 7220.96,
        "duration": 7.56
    },
    {
        "text": "without the www and now I indeed get",
        "start": 7224.88,
        "duration": 8.08
    },
    {
        "text": "back that username any questions then on",
        "start": 7228.52,
        "duration": 7.76
    },
    {
        "text": "these final",
        "start": 7232.96,
        "duration": 6.48
    },
    {
        "text": "techniques so first well could we move",
        "start": 7236.28,
        "duration": 5.28
    },
    {
        "text": "the carrot right at the beginning of",
        "start": 7239.44,
        "duration": 4.56
    },
    {
        "text": "Twitter and then just start reading from",
        "start": 7241.56,
        "duration": 4.119
    },
    {
        "text": "there and then get rid of everything",
        "start": 7244.0,
        "duration": 4.159
    },
    {
        "text": "else before that the kind of",
        "start": 7245.679,
        "duration": 5.681
    },
    {
        "text": "WWE uh issues that we had and then my",
        "start": 7248.159,
        "duration": 6.321
    },
    {
        "text": "second question is how would we um use",
        "start": 7251.36,
        "duration": 6.719
    },
    {
        "text": "kind of I guess it either a list or a a",
        "start": 7254.48,
        "duration": 6.56
    },
    {
        "text": "dictionary to to sort the dotom kind of",
        "start": 7258.079,
        "duration": 6.16
    },
    {
        "text": "thing if because we have Cod UK and that",
        "start": 7261.04,
        "duration": 6.079
    },
    {
        "text": "kind of s how would we bring that into",
        "start": 7264.239,
        "duration": 5.161
    },
    {
        "text": "uh the re function a good question but",
        "start": 7267.119,
        "duration": 4.6
    },
    {
        "text": "no if I move the carrot before",
        "start": 7269.4,
        "duration": 4.64
    },
    {
        "text": "twitter.com and throw away the protocol",
        "start": 7271.719,
        "duration": 5.081
    },
    {
        "text": "and the www then the user is going to",
        "start": 7274.04,
        "duration": 5.119
    },
    {
        "text": "have to type in literally",
        "start": 7276.8,
        "duration": 5.2
    },
    {
        "text": "twitter.com username they can't even",
        "start": 7279.159,
        "duration": 4.121
    },
    {
        "text": "type in that other stuff so that would",
        "start": 7282.0,
        "duration": 3.84
    },
    {
        "text": "be a regression a step back as for the",
        "start": 7283.28,
        "duration": 5.839
    },
    {
        "text": "do and the.org and.edu and so forth the",
        "start": 7285.84,
        "duration": 5.0
    },
    {
        "text": "short answer is there's many different",
        "start": 7289.119,
        "duration": 3.921
    },
    {
        "text": "solutions here if I wanted to be",
        "start": 7290.84,
        "duration": 4.92
    },
    {
        "text": "stringent about do and suppose that",
        "start": 7293.04,
        "duration": 4.84
    },
    {
        "text": "Twitter probably owns multiple domain",
        "start": 7295.76,
        "duration": 4.16
    },
    {
        "text": "names even though they tend to use just",
        "start": 7297.88,
        "duration": 4.4
    },
    {
        "text": "this one suppose they have uh something",
        "start": 7299.92,
        "duration": 4.52
    },
    {
        "text": "like.org as well you could use more",
        "start": 7302.28,
        "duration": 3.52
    },
    {
        "text": "parentheses here and do something like",
        "start": 7304.44,
        "duration": 4.4
    },
    {
        "text": "this Comm or org I'd probably want to go",
        "start": 7305.8,
        "duration": 5.12
    },
    {
        "text": "in and add a question mark colon to make",
        "start": 7308.84,
        "duration": 3.96
    },
    {
        "text": "it non-capture because I don't care",
        "start": 7310.92,
        "duration": 4.92
    },
    {
        "text": "which it is I just want to tolerate both",
        "start": 7312.8,
        "duration": 5.52
    },
    {
        "text": "alternatively we could capture that we",
        "start": 7315.84,
        "duration": 4.319
    },
    {
        "text": "could do something like this where we do",
        "start": 7318.32,
        "duration": 5.24
    },
    {
        "text": "do plus so as to actually capture that",
        "start": 7320.159,
        "duration": 5.52
    },
    {
        "text": "and then we could do something like this",
        "start": 7323.56,
        "duration": 7.72
    },
    {
        "text": "if matches. group one now equals equals",
        "start": 7325.679,
        "duration": 8.081
    },
    {
        "text": "Comm then we could support this so you",
        "start": 7331.28,
        "duration": 4.839
    },
    {
        "text": "could imagine factoring out the logic",
        "start": 7333.76,
        "duration": 4.479
    },
    {
        "text": "just by extracting the top level domain",
        "start": 7336.119,
        "duration": 4.441
    },
    {
        "text": "or TLD and then just using python code",
        "start": 7338.239,
        "duration": 4.0
    },
    {
        "text": "maybe a list maybe a dictionary to",
        "start": 7340.56,
        "duration": 4.44
    },
    {
        "text": "validate elsewhere outside of the redx",
        "start": 7342.239,
        "duration": 5.081
    },
    {
        "text": "if it's in fact what you expect for now",
        "start": 7345.0,
        "duration": 4.28
    },
    {
        "text": "though we kept things simple we focused",
        "start": 7347.32,
        "duration": 4.879
    },
    {
        "text": "only on the Doom in this case let's make",
        "start": 7349.28,
        "duration": 4.6
    },
    {
        "text": "one final change to this program so that",
        "start": 7352.199,
        "duration": 3.241
    },
    {
        "text": "we're being a little more specific with",
        "start": 7353.88,
        "duration": 3.799
    },
    {
        "text": "the definition of a Twitter username it",
        "start": 7355.44,
        "duration": 3.719
    },
    {
        "text": "turns out that we're being a little too",
        "start": 7357.679,
        "duration": 3.281
    },
    {
        "text": "generous over here whereby we're",
        "start": 7359.159,
        "duration": 4.161
    },
    {
        "text": "accepting one or more of any character I",
        "start": 7360.96,
        "duration": 4.32
    },
    {
        "text": "check the documentation for Twitter and",
        "start": 7363.32,
        "duration": 3.839
    },
    {
        "text": "Twitter only supports letters of the",
        "start": 7365.28,
        "duration": 5.72
    },
    {
        "text": "alphabet A through Z numbers 0-9 or",
        "start": 7367.159,
        "duration": 6.44
    },
    {
        "text": "underscores so not just dot which is",
        "start": 7371.0,
        "duration": 4.92
    },
    {
        "text": "literally anything so let me go ahead",
        "start": 7373.599,
        "duration": 4.12
    },
    {
        "text": "and be more precise here at the end of",
        "start": 7375.92,
        "duration": 5.0
    },
    {
        "text": "my string let me go ahead and say this",
        "start": 7377.719,
        "duration": 5.801
    },
    {
        "text": "set of symbols in square brackets I'm",
        "start": 7380.92,
        "duration": 4.92
    },
    {
        "text": "going to go ahead and say a through z uh",
        "start": 7383.52,
        "duration": 4.88
    },
    {
        "text": "0 through 9 and an underscore because",
        "start": 7385.84,
        "duration": 4.279
    },
    {
        "text": "again those are the only valid symbols I",
        "start": 7388.4,
        "duration": 3.36
    },
    {
        "text": "don't need to bother with an uppercase a",
        "start": 7390.119,
        "duration": 4.361
    },
    {
        "text": "or a lowercase z because we're using re.",
        "start": 7391.76,
        "duration": 5.08
    },
    {
        "text": "ignore case over here but I want to make",
        "start": 7394.48,
        "duration": 4.84
    },
    {
        "text": "sure now that I tolerate not only one or",
        "start": 7396.84,
        "duration": 5.12
    },
    {
        "text": "more of these symbols here but also",
        "start": 7399.32,
        "duration": 4.319
    },
    {
        "text": "maybe some other stuff at the end of the",
        "start": 7401.96,
        "duration": 3.56
    },
    {
        "text": "URL I'm now going to be okay with there",
        "start": 7403.639,
        "duration": 4.281
    },
    {
        "text": "being a slash or a question mark or a",
        "start": 7405.52,
        "duration": 4.44
    },
    {
        "text": "hash at the end of the URL all of which",
        "start": 7407.92,
        "duration": 4.52
    },
    {
        "text": "are valid symbols in a URL but I know",
        "start": 7409.96,
        "duration": 4.92
    },
    {
        "text": "from the Twitter's documentation are not",
        "start": 7412.44,
        "duration": 4.719
    },
    {
        "text": "part of the username all right now I'm",
        "start": 7414.88,
        "duration": 3.719
    },
    {
        "text": "going to go ahead and run python of",
        "start": 7417.159,
        "duration": 5.241
    },
    {
        "text": "twitter. one final time typing in",
        "start": 7418.599,
        "duration": 5.56
    },
    {
        "text": "HTTPS",
        "start": 7422.4,
        "duration": 4.679
    },
    {
        "text": "twitter.com davidj ma maybe with maybe",
        "start": 7424.159,
        "duration": 4.881
    },
    {
        "text": "without a trailing slash but hopefully",
        "start": 7427.079,
        "duration": 3.961
    },
    {
        "text": "with my biggest fingers crossed here I'm",
        "start": 7429.04,
        "duration": 4.519
    },
    {
        "text": "going to go ahead now and hit enter and",
        "start": 7431.04,
        "duration": 5.039
    },
    {
        "text": "thankfully my username is indeed David J",
        "start": 7433.559,
        "duration": 4.801
    },
    {
        "text": "Ma so what more is there in the world of",
        "start": 7436.079,
        "duration": 4.241
    },
    {
        "text": "regular expressions and this own Library",
        "start": 7438.36,
        "duration": 4.359
    },
    {
        "text": "not just re. search and also re.sub",
        "start": 7440.32,
        "duration": 4.64
    },
    {
        "text": "there's other functions too there's re",
        "start": 7442.719,
        "duration": 4.761
    },
    {
        "text": "dosit via which you can split a string",
        "start": 7444.96,
        "duration": 4.48
    },
    {
        "text": "not using a specific character or",
        "start": 7447.48,
        "duration": 4.36
    },
    {
        "text": "characters like a comma and a space but",
        "start": 7449.44,
        "duration": 5.0
    },
    {
        "text": "multiple characters as well and there's",
        "start": 7451.84,
        "duration": 4.799
    },
    {
        "text": "even functions like re. findall which",
        "start": 7454.44,
        "duration": 4.679
    },
    {
        "text": "can allow you to search for multiple",
        "start": 7456.639,
        "duration": 4.321
    },
    {
        "text": "copies of the same pattern in different",
        "start": 7459.119,
        "duration": 3.761
    },
    {
        "text": "places in a Str so that you can perhaps",
        "start": 7460.96,
        "duration": 4.48
    },
    {
        "text": "and manipulate more than just one so at",
        "start": 7462.88,
        "duration": 4.0
    },
    {
        "text": "the end of the day now you've really",
        "start": 7465.44,
        "duration": 3.799
    },
    {
        "text": "learned a whole other language like that",
        "start": 7466.88,
        "duration": 4.08
    },
    {
        "text": "of regular expressions and we've used",
        "start": 7469.239,
        "duration": 3.0
    },
    {
        "text": "them in Python but these regular",
        "start": 7470.96,
        "duration": 3.719
    },
    {
        "text": "Expressions actually exist in so many",
        "start": 7472.239,
        "duration": 5.0
    },
    {
        "text": "languages too among them JavaScript and",
        "start": 7474.679,
        "duration": 5.44
    },
    {
        "text": "Java and Ruby and more so with this new",
        "start": 7477.239,
        "duration": 4.681
    },
    {
        "text": "language even though it's admittedly",
        "start": 7480.119,
        "duration": 3.321
    },
    {
        "text": "cryptic when you use it for the first",
        "start": 7481.92,
        "duration": 3.239
    },
    {
        "text": "time you have this new found ability to",
        "start": 7483.44,
        "duration": 3.639
    },
    {
        "text": "express these patterns that again you",
        "start": 7485.159,
        "duration": 4.4
    },
    {
        "text": "can use to validate data to clean up",
        "start": 7487.079,
        "duration": 5.441
    },
    {
        "text": "data or even extract data and from any",
        "start": 7489.559,
        "duration": 5.241
    },
    {
        "text": "data set you might have in mind that's",
        "start": 7492.52,
        "duration": 4.48
    },
    {
        "text": "it for this week we will see you next",
        "start": 7494.8,
        "duration": 5.2
    },
    {
        "text": "time",
        "start": 7497.0,
        "duration": 3.0
    }
]