Update app.py

app.py

@@ -4,8 +4,9 @@ from requests.auth import HTTPBasicAuth
 from transformers import pipeline
 import json
 from sentence_transformers import SentenceTransformer, util
-from langchain.chains import LLMChain
-from langchain.embeddings import SentenceTransformerEmbeddings
+from langchain.chains.question_answering import load_qa_chain
+from langchain_community.embeddings import SentenceTransformerEmbeddings
+from langchain_community.vectorstores import FAISS
 from langchain.vectorstores import FAISS
 from langchain.llms import HuggingFaceEndpoint
 import numpy as np