app.py

import gradio as gr
from gpt_index import GPTSimpleVectorIndex

def chatbot(input_text):
    index = GPTSimpleVectorIndex.load_from_disk('index.json')
    response = index.query(input_text, response_mode="compact")
    return response.response

iface = gr.Interface(fn=chatbot, inputs="text", outputs="text")
iface.launch()