Update app.py

app.py

@@ -41,7 +41,7 @@ def pdf_to_text(pdf_file, query):
 
   index = vectorstore.as_retriever()
     #inference
-  qa = VectorDBQA.from_chain_type(llm=llm, chain_type="stuff", vectorstore=vectorstore)
+  #qa = VectorDBQA.from_chain_type(llm=llm, chain_type="stuff", vectorstore=vectorstore)
   from langchain.chains import RetrievalQA
   chain = RetrievalQA.from_chain_type(llm=llm, 
                                     chain_type="stuff",