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