Update app.py

app.py

@@ -12,6 +12,7 @@ from langchain.prompts import PromptTemplate
 from langchain_community.document_loaders import PyPDFLoader
 from langchain_chroma import Chroma
 from langchain_community.embeddings import HuggingFaceEmbeddings
+from transformers import pipeline
 # Load model directly
 #from transformers import AutoModelForCausalLM