Update agent_langchain.py

agent_langchain.py

@@ -4,7 +4,7 @@ from datetime import date
 from langchain.agents import AgentType, initialize_agent, load_tools, tool
 from langchain.chat_models import ChatOpenAI
 
-print(os.environ["LANGCHAIN_API_KEY"])
+print(os.environ["LANGSMITH_API_KEY"])
 os.environ["LANGCHAIN_API_KEY"] = os.environ["LANGSMITH_API_KEY"]
 os.environ["LANGCHAIN_ENDPOINT"]   = "https://api.smith.langchain.com"
 os.environ["LANGCHAIN_PROJECT"]    = "default"