Update app.py

app.py

@@ -99,8 +99,8 @@ def upload_file(filepath):
     documents = SimpleDirectoryReader(filepath).load_data()
     index = VectorStoreIndex.from_documents(documents)
     #query_engine = index.as_query_engine()
-    #condense_question
-    chat_engine = index.as_chat_engine(chat_mode="condense_plus_context", verbose=True)
+    #condense_question condense_plus_context
+    chat_engine = index.as_chat_engine(chat_mode="best", verbose=True)
     return filepath
 
 def resetChat():