main.py:从 0 到 1 搭建基于 LangGraph 的 AI Agent main1.py:从零开始构建简单 ReAct Agent conda create -n langgraph python=3.12 -y conda activate langgraph pip install langgraph langchain langchain-openai langchain-community pygraphviz pygraphviz是用来图形化流程的,安装不上可跳过