Code Editor for app.py

import streamlit as st
import openai

# Initialize OpenAI client
client = openai.OpenAI(api_key=st.secrets.get("OPENAI_API_KEY", ""))

st.title("💬 Chat with AI")

# Initialize chat history
if "messages" not in st.session_state:
    st.session_state.messages = []

# Display chat messages from history on app rerun
for message in st.session_state.messages:
    with st.chat_message(message["role"]):
        st.markdown(message["content"])

# Accept user input
if prompt := st.chat_input("What would you like to know?"):
    # Add user message to chat history
    st.session_state.messages.append({"role": "user", "content": prompt})
    # Display user message in chat message container
    with st.chat_message("user"):
        st.markdown(prompt)

    # Display assistant response in chat message container
    with st.chat_message("assistant"):
        message_placeholder = st.empty()
        full_response = ""
        
        # Send message to OpenAI
        try:
            for response in client.chat.completions.create(
                model="gpt-3.5-turbo",
                messages=[{"role": m["role"], "content": m["content"]} for m in st.session_state.messages],
                stream=True,
            ):
                full_response += (response.choices[0].delta.content or "")
                message_placeholder.markdown(full_response + "▌")
            message_placeholder.markdown(full_response)
        except Exception as e:
            st.error(f"Error: {str(e)}. Please make sure you have set up your OpenAI API key in secrets.")
            st.stop()
    
    # Add assistant response to chat history
    st.session_state.messages.append({"role": "assistant", "content": full_response})