Langgraph 运行时上下文使用示例``` 导入 from dataclasses import dataclass

导入
from dataclasses import dataclass

# 1. 定义运行时上下文类型
@dataclass 
class UserContext:
    username: str

# 在节点内获取使用
def llm_node(state: OverAllState, runtime: Runtime[UserContext]) -> OverAllState:
   runtime_context = runtime.context
   ...
   ...

# 构建state时传入content类
builder = StateGraph(state_schema=OverAllState, context_schema=UserContext)

# 发起时传入content实例
res = graph.invoke( {"user_input": "你好，帮我查一下我有哪些资产"}, config=config, context=UserContext(username="Alice") )