Update src/chat_langraph.py

src/chat_langraph.py

@@ -1,3 +1,5 @@
+import os
+os.environ["MPLCONFIGDIR"] = "/tmp"
 from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain_core.messages import BaseMessage, ToolMessage, AIMessage, SystemMessage, HumanMessage
 from langgraph.graph import StateGraph, add_messages, START, END
@@ -11,7 +13,7 @@ import requests
 import matplotlib.pyplot as plt 
 import uuid
 from datetime import datetime
-import os
+
 import math 
 from math import *