app.py

from fastai.vision.all import *
import gradio as gr

def is_cat(x):
    return x[0].isupper()

learn = load_learner('model.pkl')

categories = ('Cat', 'Dog')

prompts = [
    "# Definitely a {}!",
    "# Well, that must be a {}!",
    "# Oh, that's a {}!",
    "# That's a {}!",
    "# Looks like a {} to me!",
]

failure_prompts = [
    "# I'm not sure what that is.",
    "# I don't know what that thing is.",
    "# I've never seen that before.",
    "# Looks familiar, but unsure.",
    "# Something, something?",
    "# Beats me.",
]

def classify_image(img):
    pred,idx,probs = learn.predict(img)
    return dict(zip(categories, map(float,probs)))

def calculate(confidence_threshold, img):
    classifications = classify_image(img)
    classification = random.choice(failure_prompts)
    for key, value in classifications.items():
        if value > confidence_threshold:
            classification = random.choice(prompts).format(key)
            break

    return [classification, classifications]


with gr.Blocks() as ui:

    heading = gr.Markdown(" # Dog or Cat?", render=False)
    results = gr.Label(value="Waiting to receive image.", label="Details", show_label=False, render=False)

    with gr.Row(equal_height=True):

        with gr.Column():
            gr.Markdown("Upload an image of a cat or a dog.")

            with gr.Group():
                image = gr.Image(show_label=False, height=300)
                confidence = gr.Slider(minimum=0.0, maximum=1.0, value=0.7, label="Confidence Threshold")
                btn = gr.Button(value="Classify")
                btn.click(calculate, inputs=[confidence, image], outputs=[heading, results])

        with gr.Column():
            gr.Markdown("Then wait for the magic to happen")
            with gr.Group():
                results.render()
                heading.render()

    gr.Markdown(" # Examples")
    with gr.Group():
        gr.Examples(inputs=image, examples=['images/cat1.jpeg', 'images/cat2.jpeg', 'images/cat3.jpeg', 'images/dog1.jpeg', 'images/dog2.jpeg', 'images/dog3.jpeg'])

if __name__ == "__main__":
    ui.launch()