Update app.py

app.py

@@ -7,7 +7,7 @@ from langchain.document_loaders import UnstructuredPDFLoader, OnlinePDFLoader, P
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.vectorstores import FAISS
-from langchain.llms import OpenAI
+from langchain.llms import OpenAI,AzureOpenAI
 from langchain.chains.question_answering import load_qa_chain
 from langchain.callbacks import get_openai_callback