modelity.unset

modelity.unset.Unset: Final = Unset: Singleton instance of the UnsetType.

class modelity.unset.UnsetType

Bases: object

Singleton type for representing unset or undefined values.

It has only one global instance to allow fast is-a tests in the code and always evaluates to False.

__bool__()

static __new__(cls)

__repr__(): Return repr(self).

__slots__: list = []

modelity.unset.is_unset(obj: object) → TypeIs[UnsetType]: Check if obj is instance of UnsetType type.

Changed in version 0.31.0: Now uses typing_extensions.TypeIs for type narrowing.

Added in version 0.17.0.