Update app.py

app.py

@@ -10,7 +10,8 @@ from typing import List, Dict, Any, Tuple, Optional
 from langchain_core.messages import HumanMessage, AIMessage, SystemMessage
 from langchain_core.messages import BaseMessage
 from langchain.schema import Document
-from langchain_google_genai import ChatGoogleGenerativeAI
+from langchain_openai import ChatOpenAI
+# from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain_community.tools.tavily_search import TavilySearchResults
 from langchain_community.tools.wikipedia.tool import WikipediaQueryRun
 from langchain_community.utilities.wikipedia import WikipediaAPIWrapper