app.py

from fastapi import FastAPI, UploadFile, File
from transformers import pipeline
from fastai.vision.all import *
from PIL import Image

# NOTE - we configure docs_url to serve the interactive Docs at the root path
# of the app. This way, we can use the docs as a landing page for the app on Spaces.
app = FastAPI(docs_url="/")

pipe = pipeline("text2text-generation", model="google/flan-t5-small")
categories = ('Heart', 'Oblong', 'Oval', 'Round', 'Square')
learn = load_learner('model.pkl')

@app.get("/generate")
def generate(text: str):
    """
    Using the text2text-generation pipeline from `transformers`, generate text
    from the given input text. The model used is `google/flan-t5-small`, which
    can be found [here](https://huggingface.co/google/flan-t5-small).
    """
    output = pipe(text)
    return {"output": output[0]["generated_text"]}

@app.post("/uploadfile/")
async def create_upload_file(file: UploadFile = File(...)):
    # Read the uploaded file content
    request_object_content = await file.read()
    
    try:
        # Attempt to open the image
        img = Image.open(io.BytesIO(request_object_content))
    except Exception as e:
        return {"error": "Failed to open the image file. Make sure it is a valid image file."}

    # Check if img is None or not
    if img is None:
        return {"error": "Failed to open the image file."}

    try:
        # Assuming 'learn' is your image classifier model
        pred, idx, probs = learn.predict(img)
    except Exception as e:
        return {"error": "Failed to make predictions."}

    # Assuming categories is a list of category labels
    return dict(zip(categories, map(float, probs)))