Update app.py

app.py

@@ -23,6 +23,7 @@ from langchain.llms import HuggingFaceHub
 from langchain.llms import HuggingFaceTextGenInference
 from langchain.embeddings import HuggingFaceInstructEmbeddings, HuggingFaceEmbeddings, HuggingFaceBgeEmbeddings, HuggingFaceInferenceAPIEmbeddings
 from langchain.retrievers.tavily_search_api import TavilySearchAPIRetriever
+from langchain_community.llms import HuggingFaceEndpoint
 
 from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.prompts import PromptTemplate