Update app.py

app.py

@@ -103,9 +103,9 @@ with st.sidebar:
             st.success("Done")
 
 user_prompt = st.chat_input("Ask me anything about the content of the PDF:")
-if user_prompt:
+if user_prompt and uploaded_file:
     st.session_state.messages.append({'role': 'user', "content": user_prompt})
-    with st.chat_message("user", avatar="⛷️"):
+    with st.chat_message("user", avatar="👽"):
         st.write(user_prompt)
     # response = handle_query(user_prompt)
     # st.session_state.messages.append({'role': 'assistant', "content": response})
@@ -116,7 +116,7 @@ if user_prompt:
 
 # Generate a new response if last message is not from assistant
 if st.session_state.messages[-1]["role"] != "assistant":
-    with st.chat_message("assistant"):
+    with st.chat_message("assistant",avatar="./assistant.jpeg"):
         response = handle_query(user_prompt)
         full_response = st.write_stream(response)
     message = {"role": "assistant", "content": full_response}