Update app.py

app.py

@@ -13,6 +13,7 @@ from ctransformers import AutoModelForCausalLM
 from langchain.llms import HuggingFaceHub
 from transformers import AutoModelForCausalLM, AutoTokenizer
 from langchain.embeddings import HuggingFaceEmbeddings
+from langchain.llms import HuggingFacePipeline
 import os
 import transformers
 import torch