Update app.py

app.py

@@ -13,6 +13,7 @@ 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_core.embeddings import Embeddings
 from langchain.embeddings import HuggingFaceInstructEmbeddings, HuggingFaceEmbeddings, HuggingFaceBgeEmbeddings, HuggingFaceInferenceAPIEmbeddings
 
 from langchain.embeddings.openai import OpenAIEmbeddings