Code Editor for app.py

import streamlit as st
import time

st.title("Dual Chat Interface")

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

# Create two columns
left_col, right_col = st.columns(2)

# Left column - Chat input
with left_col:
    st.subheader("Ask your question")
    if prompt := st.chat_input("What's on your mind?", key="left_input"):
        # Add message to history
        st.session_state.messages.append({"role": "user", "content": prompt})
        
        # Display the message
        with st.chat_message("user"):
            st.write(prompt)

# Right column - Chat display with incremental response
with right_col:
    st.subheader("Response")
    
    # Display chat messages from history
    for message in st.session_state.messages:
        # Show user message
        with st.chat_message("user"):
            st.write(message["content"])
            
        # Generate and show assistant response
        with st.chat_message("assistant"):
            response = f"I received your message: '{message['content']}'. This is a demo response that types out character by character."
            
            # Create an empty placeholder
            message_placeholder = st.empty()
            full_response = ""
            
            # Simulate stream of response with a typing effect
            for chunk in response.split():
                full_response += chunk + " "
                time.sleep(0.05)  # Add delay between words
                # Add a blinking cursor to simulate typing
                message_placeholder.markdown(full_response + "▌")