Update app3copy.py

app3copy.py

@@ -21,9 +21,10 @@ import wikipedia
 from googleapiclient.discovery import build
 from typing import List, Optional
 from httpx_sse import SSEError
+from langchain_huggingface import HuggingFaceEmbeddings
 from langchain_community.vectorstores import FAISS
-from langchain.embeddings.sentence_transformer import SentenceTransformerEmbeddings
-from langchain.chat_models import ChatOpenAI
+from langchain_community.embeddings import SentenceTransformerEmbeddings
+from langchain_community.chat_models import ChatOpenAI
 from langchain.schema import HumanMessage, SystemMessage
 from langchain.chains import ConversationalRetrievalChain