Update app.py

app.py

@@ -0,0 +1,37 @@
+import streamlit as st
+import time
+
+# App layout
+st.set_page_config(page_title="Chat App", layout="wide")
+st.title("Chat App")
+st.markdown("This is a simple chat application similar to WhatsApp.")
+
+# Initialize session state to store chat messages
+if "messages" not in st.session_state:
+    st.session_state.messages = []
+
+# Function to display chat messages
+def display_messages():
+    for message in st.session_state.messages:
+        if message["user"] == "You":
+            st.markdown(f"**You:** {message['text']}")
+        else:
+            st.markdown(f"**Friend:** {message['text']}")
+
+# Input area
+with st.form(key="chat_form"):
+    user_input = st.text_input("Enter your message:", "")
+    submitted = st.form_submit_button("Send")
+
+# Handle message submission
+if submitted and user_input.strip():
+    # Append user message
+    st.session_state.messages.append({"user": "You", "text": user_input})
+
+    # Simulate a friend response after a short delay
+    time.sleep(1)
+    friend_response = f"I received: {user_input}"
+    st.session_state.messages.append({"user": "Friend", "text": friend_response})
+
+# Display chat messages
+display_messages()