Update app.py

app.py

@@ -100,9 +100,6 @@ def main():
     st.header("Chat with multiple Files :")
     user_question = st.text_input("Ask a question about your documents:")
 
-    if user_question:
-        handle_userinput(user_question)
-
     with st.sidebar:
         st.subheader("Your documents")
         docs = st.file_uploader(
@@ -128,6 +125,9 @@ def main():
                 vectorstore = get_vectorstore(text_chunks)
                 st.session_state.conversation = get_conversation_chain(vectorstore)
 
+    if user_question and st.session_state.conversation:  # 대화 체인이 있을 때만 사용자 입력 처리
+        handle_userinput(user_question)
+
 
 if __name__ == '__main__':
-    main()
+    main()