Update app.py

app.py

@@ -4,8 +4,8 @@ import numpy as np
 import getpass
 import os
 
-from langchain.llms import OpenAI
-from langchain.vectorstores import Chroma
+from langchain_community.llms import OpenAI
+from langchain_community.vectorstores import Chroma
 from langchain_community.document_loaders import TextLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter, CharacterTextSplitter
 from langchain.embeddings.openai import OpenAIEmbeddings