Update app.py

app.py

@@ -79,14 +79,14 @@ def create_conversational_chain(vector_store):
 
     memory = ConversationBufferMemory(memory_key="chat_history", return_messages=True)
 
-    """chain = ConversationalRetrievalChain.from_llm(llm=llm, chain_type='stuff',
+    chain = ConversationalRetrievalChain.from_llm(llm=llm, chain_type='stuff',
                                                  retriever=vector_store.as_retriever(search_kwargs={"k": 2}),
-                                                 memory=memory)"""
-    
+                                                 memory=memory) 
+    """
     chain = RetrievalQA.from_chain_type(llm=llm, chain_type="stuff",
                                      retriever=vector_store.as_retriever(search_kwargs={"k": 2}),
                                     memory = memory)
-    return chain
+    return chain """
 
 def main():
     # Initialize session state