Update app.py

app.py

@@ -7,6 +7,7 @@ from aimakerspace.openai_utils.prompts import (
 from aimakerspace.vectordatabase import VectorDatabase
 from aimakerspace.openai_utils.chatmodel import ChatOpenAI
 from langchain_community.embeddings import OpenAIEmbeddings
+from langchain.text_splitter import RecursiveCharacterTextSplitter
 import chainlit as cl
 import nest_asyncio
 nest_asyncio.apply()