Update app.py

app.py

@@ -6,18 +6,18 @@ import os
 from langchain.chat_models import ChatOpenAI
 from langchain import ConversationChain, LLMChain, PromptTemplate
 from langchain.memory import ConversationBufferWindowMemory
-from flask_cors import CORS
+# from flask_cors import CORS
 
 from langchain.text_splitter import CharacterTextSplitter
 from langchain.vectorstores import Chroma
 from langchain.embeddings import OpenAIEmbeddings
-from flask_cors import CORS, cross_origin
+# from flask_cors import CORS, cross_origin
 
 from langchain.chains import RetrievalQA
 # from langchain.llms import OpenAI
 # from langchain_community.chat_models import ChatOpenAI
-from PyPDF2 import PdfReader
-from typing_extensions import Concatenate
+# from PyPDF2 import PdfReader
+# from typing_extensions import Concatenate
 from langchain.chat_models import ChatOpenAI
 
 
@@ -30,7 +30,7 @@ from langchain.prompts.chat import (
 )
 from langchain.schema import HumanMessage, SystemMessage
 
-from flask import Flask, request, jsonify
+# from flask import Flask, request, jsonify
 import os