Add response streaming

app.py

@@ -1,6 +1,23 @@
 import streamlit as st
+import random
+import time
 
-st.title("Echo Bot")
+
+# Streamed response emulator
+def response_generator():
+    response = random.choice(
+        [
+            "Hello there! How can I assist you today?",
+            "Hi, human! Is there anything I can help you with?",
+            "Do you need help?",
+        ]
+    )
+    for word in response.split():
+        yield word + " "
+        time.sleep(0.05)
+
+
+st.title("Simple chat")
 
 # Initialize chat history
 if "messages" not in st.session_state:
@@ -11,17 +28,16 @@ for message in st.session_state.messages:
     with st.chat_message(message["role"]):
         st.markdown(message["content"])
 
-# React to user input
+# Accept user input
 if prompt := st.chat_input("What is up?"):
+    # 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)
-    # Add user message to chat history
-    st.session_state.messages.append({"role": "user", "content": prompt})
 
-response = f"Echo: {prompt}"
-# Display assistant response in chat message container
-with st.chat_message("assistant"):
-    st.markdown(response)
-# Add assistant response to chat history
-st.session_state.messages.append({"role": "assistant", "content": response})
+    # Display assistant response in chat message container
+    with st.chat_message("assistant"):
+        response = st.write_stream(response_generator())
+    # Add assistant response to chat history
+    st.session_state.messages.append({"role": "assistant", "content": response})