Code Editor for app.py

import streamlit as st
import random
import time

# Streamed response emulator
def response_generator():
    responses = [
        "Hello there! How can I assist you today?",
        "Hi, human! Is there anything I can help you with?",
        "Do you need help?",
    ]
    response = random.choice(responses)
    response_text = ""
    for word in response.split():
        response_text += word + " "
        st.write(response_text) 
        time.sleep(0.1)
    return response_text

st.title("Simple Chat Bot")

if "messages" not in st.session_state:
    st.session_state.messages = []
if "is_chat_input_disabled" not in st.session_state:
    st.session_state.is_chat_input_disabled = False

for message in st.session_state.messages:
    with st.chat_message(message["role"]):
        st.markdown(message["content"])

if prompt := st.chat_input("What is up?", disabled=st.session_state.is_chat_input_disabled) or st.session_state.is_chat_input_disabled:

    if not st.session_state.is_chat_input_disabled:
        st.session_state.messages.append({"role": "user", "content": prompt})
        
        with st.chat_message("user"):
            st.markdown(prompt)
        
        st.session_state.is_chat_input_disabled = True
        st.experimental_rerun() 

    elif st.session_state.is_chat_input_disabled:
        response_text = response_generator()
        
        st.session_state.messages.append({"role": "assistant", "content": response_text})
        
        st.session_state.is_chat_input_disabled = False
        st.rerun()