Update app.py

app.py

@@ -17,6 +17,7 @@ from langchain_community.vectorstores import FAISS
 from langchain_community.document_loaders import TextLoader
 from langchain.text_splitter import CharacterTextSplitter
 from langchain.chains import RetrievalQA
+from torchvision import transforms
 import json
 
 # Initialize models and clients