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"cells": [
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"scrolled": true
},
"outputs": [],
"source": [
"%load_ext autoreload\n",
"%autoreload 2\n",
"from hydra.experimental import initialize, compose"
]
},
{
"cell_type": "raw",
"metadata": {},
"source": [
"This is what our config structure looks like:\n",
"\n",
"$ tree hydra/test_utils/configs/cloud_infra_example/\n",
"hydra/test_utils/configs/cloud_infra_example/\n",
"├── application\n",
"│ ├── bananas.yaml\n",
"│ └── donkey.yaml\n",
"├── cloud_provider\n",
"│ ├── aws.yaml\n",
"│ └── local.yaml\n",
"├── config.yaml\n",
"├── db\n",
"│ ├── mysql.yaml\n",
"│ └── sqlite.yaml\n",
"├── environment\n",
"│ ├── production.yaml\n",
"│ └── testing.yaml\n",
"└── __init__.py\n",
"\n",
"Note the __init__.py at the end, it can be empty but you need it to help Python fine the config files."
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {},
"outputs": [],
"source": [
"initialize(config_path=\"../../hydra/test_utils/configs/cloud_infra_example\")"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"{}\n",
"\n"
]
}
],
"source": [
"# Compose empty config (not super useful)\n",
"cfg=compose()\n",
"print(cfg.pretty())"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"db:\n",
" driver: sqlite\n",
" user: ???\n",
" pass: ???\n",
" file: test.db\n",
"\n"
]
}
],
"source": [
"# Compose a config from scratch\n",
"# Missing actual user and password as those are environment specific\n",
"cfg=compose(overrides=[\"+db=sqlite\"])\n",
"print(cfg.pretty())"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"db:\n",
" driver: mysql\n",
" user: mysql\n",
" pass: r4Zn*jQ9JB1Rz2kfz\n",
"donkey:\n",
" name: kong\n",
" rank: king\n",
"\n"
]
}
],
"source": [
"# compose application specific config (in this case the applicaiton is \"donkey\")\n",
"cfg=compose(overrides= [\"+db=mysql\", \"+environment=production\", \"+application=donkey\"])\n",
"print(cfg.pretty())"
]
},
{
"cell_type": "code",
"execution_count": 6,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"db:\n",
" driver: sqlite\n",
" user: test\n",
" pass: test\n",
" file: test.db\n",
"cloud:\n",
" name: local\n",
" host: localhost\n",
" port: 9876\n",
"\n"
]
}
],
"source": [
"# compose from config.yaml, this composes a bunch of defaults in:\n",
"cfg=compose(config_name=\"config.yaml\")\n",
"print(cfg.pretty())"
]
},
{
"cell_type": "code",
"execution_count": 7,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"db:\n",
" driver: sqlite\n",
" user: mysql\n",
" pass: r4Zn*jQ9JB1Rz2kfz\n",
" file: test.db\n",
"cloud:\n",
" name: aws\n",
" api_key: ${env:AWS_API_KEY}\n",
" ami_id: MY_AMI_ID\n",
"\n"
]
}
],
"source": [
"# compose from config.yaml and override from the default testing\n",
"# environment to production and cloud provider to aws.\n",
"# Also override the ami id\n",
"cfg=compose(\n",
" config_name=\"config.yaml\", \n",
" overrides=[\n",
" \"cloud_provider=aws\",\n",
" \"environment=production\",\n",
" \"cloud.ami_id=MY_AMI_ID\",\n",
" ]\n",
")\n",
"print(cfg.pretty())"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.8.2"
}
},
"nbformat": 4,
"nbformat_minor": 2
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