Update app.py

app.py

@@ -118,16 +118,11 @@ for i, chat in enumerate(st.session_state.history):
     message(chat['question'], is_user=True, key=f"user_{i}")
     message(chat['answer'], key=f"bot_{i}")
 
-if 'something' not in st.session_state:
-    st.session_state.something = ''
-
-user_input = st.text_input("Ask a question:", key="input")
+user_input = st.chat_input(placeholder="Ask a question:", key="input")
 
 if st.button("Generate"):
     if user_input:
         result = st.session_state.qa_chain(user_input)
         answer = result["result"]
         st.session_state.history.append({"question": user_input, "answer": answer})
-        st.session_state.something = st.session_state.input
-        st.session_state.input = ''