app.py

import os
import gradio as gr
from openai import OpenAI

# Load API key from Hugging Face secret (set in the Secrets tab)
client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))

# Define the chat function
def chat_with_gpt(message, history):
    messages = []
    for human, assistant in history:
        messages.append({"role": "user", "content": human})
        messages.append({"role": "assistant", "content": assistant})
    messages.append({"role": "user", "content": message})

    # Call OpenAI API
    response = client.chat.completions.create(
        model="gpt-3.5-turbo",
        messages=messages,
        max_tokens=150,
        temperature=0.7
    )

    # Return the assistant's reply
    return response.choices[0].message.content

# Create Gradio interface
demo = gr.ChatInterface(
    fn=chat_with_gpt,
    title="ChatGPT Demo on Hugging Face",
    examples=["What's the capital of Canada?", "Tell me a joke.", "Explain quantum computing."],
    cache_examples=False
)

# Launch the app
demo.launch()