让描述信息empty得更彻底

app.py

@@ -369,6 +369,9 @@ def app():
     user_question = st.chat_input("Enter your questions when learning...")
 
     if user_question:
+        st.session_state.description1.empty()
+        st.session_state.divider.empty()
+        st.session_state.description2.empty()
         
         with col1:
             #把课程大纲打印出来