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- 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]
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