Update functions.py

functions.py

@@ -29,8 +29,7 @@ from langchain.embeddings import HuggingFaceEmbeddings,HuggingFaceInstructEmbedd
 from langchain.vectorstores import FAISS
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.chat_models import ChatOpenAI
-from langchain.callbacks.base import CallbackManager
-from langchain.callbacks.streaming_stdout import StreamingStdOutCallbackHandler
+from langchain.callbacks import StdOutCallbackHandler
 from langchain.chains import ConversationalRetrievalChain, QAGenerationChain, RetrievalQA
 from langchain.memory import ConversationBufferMemory