Update app.py

app.py

@@ -67,8 +67,8 @@ from langchain.chains import create_retrieval_chain
 #READER_MODEL=Ollama(model="meta-llama/Meta-Llama-Guard-2-8B")
 
 
-#READER_MODEL="HuggingFaceH4/zephyr-7b-beta"
-READER_MODEL=ChatMistralAI(model=""HuggingFaceH4/zephyr-7b-beta")
+READER_MODEL='HuggingFaceH4/zephyr-7b-beta'
+#READER_MODEL=ChatMistralAI(model=""HuggingFaceH4/zephyr-7b-beta")
 
 #qa = ConversationalRetrievalChain.from_llm(llm=READER_MODEL,retriever=retriever,memory=memory)
 #qa = RetrievalQA.from_chain_type(llm=READER_MODEL,retriever=retriever)