initial commit

venv/Lib/site-packages/langgraph/managed/base.py

@@ -0,0 +1,31 @@
+from abc import ABC, abstractmethod
+from inspect import isclass
+from typing import (
+    Any,
+    Generic,
+    TypeGuard,
+    TypeVar,
+)
+
+from langgraph._internal._scratchpad import PregelScratchpad
+
+V = TypeVar("V")
+U = TypeVar("U")
+
+__all__ = ("ManagedValueSpec", "ManagedValueMapping")
+
+
+class ManagedValue(ABC, Generic[V]):
+    @staticmethod
+    @abstractmethod
+    def get(scratchpad: PregelScratchpad) -> V: ...
+
+
+ManagedValueSpec = type[ManagedValue]
+
+
+def is_managed_value(value: Any) -> TypeGuard[ManagedValueSpec]:
+    return isclass(value) and issubclass(value, ManagedValue)
+
+
+ManagedValueMapping = dict[str, ManagedValueSpec]