app.py

import gradio as gr
from transformers import pipeline, AutoTokenizer, AutoModelForSeq2SeqLM
import json

model_name = "google/flan-t5-small"
tokenizer = AutoTokenizer.from_pretrained(model_name)
model = AutoModelForSeq2SeqLM.from_pretrained(model_name)
generator = pipeline("text2text-generation", model=model, tokenizer=tokenizer)

def generate_json(prompt):
    instruction = f"Generate a JSON object from the following description:\n{prompt}"
    result = generator(instruction, max_length=256, do_sample=False)
    generated_text = result[0]["generated_text"]

    try:
        parsed = eval(generated_text)
        formatted_json = json.dumps(parsed, indent=2)
    except Exception as e:
        formatted_json = f"Raw Output:\n{generated_text}\n\nError parsing JSON: {e}"

    return formatted_json

# 🔥 Make sure to assign to a variable
demo = gr.Interface(
    fn=generate_json,
    inputs=gr.Textbox(lines=4, label="Enter Prompt"),
    outputs=gr.Textbox(lines=20, label="Generated JSON"),
    title="Lightweight JSON Generator",
    description="Enter a prompt describing the structure or content you want in JSON format."
)

# 🔁 This is what allows external API calls
demo.queue()
demo.launch(show_error=True)