Update app.py

app.py

@@ -22,7 +22,7 @@ def pdf_changes(pdf_doc):
     db = Chroma.from_documents(texts, embeddings)
     retriever = db.as_retriever()
     global qa 
-    qa = RetrievalQA.from_chain_type(llm=OpenAI(), chain_type="stuff", retriever=retriever, return_source_documents=True)
+    qa = RetrievalQA.from_chain_type(llm=OpenAI(temperature=0.5), chain_type="stuff", retriever=retriever, return_source_documents=True)
     return "Ready"
 
 def add_text(history, text):