Update app.py

app.py

@@ -8,6 +8,7 @@ from langchain.chains import LLMChain
 from langchain_core.output_parsers.string import StrOutputParser
 from langchain.chat_models import ChatOpenAI
 from langchain.embeddings.openai import OpenAIEmbeddings
+from langchain.embeddings import HuggingFaceBgeEmbeddings
 
 from sentence_transformers import SentenceTransformer