Update rag_langchain.py

rag_langchain.py

@@ -2,14 +2,13 @@ import os
 
 from langchain.callbacks import get_openai_callback
 from langchain.chains import LLMChain, RetrievalQA
-#from langchain.chat_models import ChatOpenAI
+from langchain.chat_models import ChatOpenAI
 from langchain.document_loaders import PyPDFLoader, WebBaseLoader
 from langchain.document_loaders.blob_loaders.youtube_audio import YoutubeAudioLoader
 from langchain.document_loaders.generic import GenericLoader
 from langchain.document_loaders.parsers import OpenAIWhisperParser
 from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.prompts import PromptTemplate
-from langchain_openai import ChatOpenAI
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.vectorstores import Chroma
 from langchain.vectorstores import MongoDBAtlasVectorSearch