Update app.py

app.py

@@ -1,10 +1,10 @@
 import streamlit as st
 from langchain_community.document_loaders import TextLoader
-from langchain.text_splitter import CharacterTextSplitter
-from langchain.embeddings import OpenAIEmbeddings
+from langchain_community.text_splitter import CharacterTextSplitter
+from langchain_community.embeddings import OpenAIEmbeddings
 from langchain_community.vectorstores import Chroma
-from langchain.chains import RetrievalQA
-from langchain.embeddings.sentence_transformer import SentenceTransformerEmbeddings
+from langchain_community.chains import RetrievalQA
+from langchain_community.embeddings.sentence_transformer import SentenceTransformerEmbeddings
 
 
 class TextLoader: