app.py

# app.py
import os
os.environ["TRANSFORMERS_NO_TF"] = "1"
os.environ["TRANSFORMERS_NO_FLAX"] = "1"
os.environ["TF_CPP_MIN_LOG_LEVEL"] = "3"

import gradio as gr
from PIL import Image
from hf_model import PretrainedAgeEstimator

est = PretrainedAgeEstimator()

def predict(img):
    # Gradio may pass PIL or numpy; handle both
    if not isinstance(img, Image.Image):
        img = Image.fromarray(img)

    age, top = est.predict(img, topk=5)

    # 1) dict[str, float] for Label
    probs = {lbl: float(prob) for lbl, prob in top}

    # 2) plain string for the estimate
    summary = f"Estimated age: **{age:.1f}** years"

    return probs, summary

demo = gr.Interface(
    fn=predict,
    inputs=gr.Image(type="pil", label="Upload a face image"),
    outputs=[
        gr.Label(num_top_classes=5, label="Age Prediction (probabilities)"),
        gr.Markdown(label="Summary"),
    ],
    title="Pretrained Age Estimator",
    description="Runs a pretrained ViT-based age classifier and reports a point estimate from class probabilities."
)

if __name__ == "__main__":
    demo.launch(share=True)