Update app.py

app.py

@@ -1,7 +1,8 @@
 import os
 import gradio as gr
 from langchain.agents import initialize_agent
-from langchain.chat_models import ChatOpenAI
+#from langchain.chat_models import ChatOpenAI
+from langchain_community.chat_models import ChatOpenAI
 from langchain.memory import ConversationBufferMemory
 from langchain.prompts import ChatPromptTemplate, MessagesPlaceholder
 from langchain.tools import Tool