Update app.py

app.py

@@ -12,6 +12,7 @@ from langchain.document_loaders.generic import GenericLoader
 from langchain.document_loaders.parsers import OpenAIWhisperParser
 from langchain.schema import AIMessage, HumanMessage
 from langchain.llms import HuggingFaceHub
+from langchain.llms import HuggingFaceTextGenInference
 
 from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.prompts import PromptTemplate