Update app.py

app.py

@@ -112,7 +112,7 @@ QA_PROMPT = PromptTemplate(template=template, input_variables=["question", "cont
 
 def get_chain(vectorstore):
     llm = OpenAIChat(streaming=True, 
-                     callbacks=[StdOutCallbackHandler()]), 
+                     callbacks=[StdOutCallbackHandler()], 
                      verbose=True, 
                      temperature=0,
                      model_name='gpt-4-0613')