Update app.py

app.py

@@ -89,14 +89,7 @@ def create_qa_chain(retriever):
 
 
 #=======================
-def chat(message, history):
-    answer = qa_chain.invoke(message)
-    # Get docs for refs
-    docs = retriever.invoke(message)
-    refs = [f"Page {d.metadata.get('page', 'N/A')}" for d in docs]
-    full = f"{answer}\n\nRefs: {' | '.join(refs)}"
-    history.append([message, full])
-    return history, ""
+
 #============starting extract_docx_text
 def respond(message, history, doc_choice):
     
@@ -111,6 +104,7 @@ def respond(message, history, doc_choice):
         ]
         return "", new_history
     else:
+        retriever=None
         if doc_choice == "gpc_goods":        
             retriever=retrieve_chunks_GPC()
         else: