Update app.py

app.py

@@ -18,6 +18,7 @@ from transformers import AutoTokenizer, AutoModelForCausalLM, pipeline
 from queue import Queue
 from threading import Thread
 from langchain.chains import LLMChain
+from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_core.prompts import PromptTemplate
 
 logging.basicConfig(level=logging.INFO)