Update app.py

app.py

@@ -141,14 +141,18 @@ def process_user_question(user_question):
 
     # st.empty()
 
-    try:
-        st.session_state.conversation({'question': "Summarize the document"})
-        # if "key" not in st.session_state:
-        #     st.write('Good')
-    except:
+    # try:
+    #     st.session_state.conversation({'question': "Summarize the document"})
+    #     # if "key" not in st.session_state:
+    #     #     st.write('Good')
+    # except:
+    #     st.error("Please upload and analyze your PDF files first!")
+    #     return
+
+    if st.session_state.conversation == None:
         st.error("Please upload and analyze your PDF files first!")
         return
-    
+            
     response = st.session_state.conversation({'question': user_question})
     st.session_state.chat_history = response['chat_history']
     results_size = len(response['chat_history'])