Update agent_langchain.py

agent_langchain.py

@@ -4,10 +4,9 @@ from datetime import date
 from langchain.agents import AgentType, initialize_agent, load_tools, tool
 from langchain.chat_models import ChatOpenAI
 
-LANGCHAIN_API_KEY    = os.environ["LANGSMITH_API_KEY"]
-LANGCHAIN_ENDPOINT   = "https://api.smith.langchain.com"
-LANGCHAIN_PROJECT    = "Hugging Face"
-LANGCHAIN_TRACING_V2 = True
+os.environ["LANGCHAIN_ENDPOINT"]   = "https://api.smith.langchain.com"
+os.environ["LANGCHAIN_PROJECT"]    = "default"
+os.environ["LANGCHAIN_TRACING_V2"] = "true"
 
 @tool
 def today_tool(text: str) -> str: