Update app.py

app.py

@@ -10,7 +10,7 @@ import glob
 from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.vectorstores import Chroma
 from langchain.text_splitter import TokenTextSplitter
-#from langchain.llms import OpenAI
+from langchain.llms import OpenAI
 from langchain.chat_models import ChatOpenAI
 #from langchain.chains import ChatVectorDBChain
 from langchain.chains import RetrievalQA