description

PyPI project pythonic-fp-singletons was renamed to pythonic-fp-sentinels.

Both part of the pythonic-fp namespace projects.

Final PyPI release of pythonic-fp-singletons was the one and only v1.0.0 release.

Sentinel classes - implemented as singletons

Sentinel	Represents
NoValue()	actually missing value, not potentially missing
Sentinel(hashable)	distinct sentinels indexed by a hashable values

Changes since v1.0.0 release

singletons.sbool

Module sbool was moved to its own package pythonic_fp.booleans and completely reimplemented into modules subtypable_bool and flavored_bool, the first is a subtypable boolean-like type. The second type is a family of booleans of different “flavors” of truth where each flavor is a value of any hashable type. Both can be used in Python shortcut logic. Both can use Python bitwise operations to do non-shortcut boolean logic.

singletons.nada

Module nada has been removed.

Though I learned a lot about Python getting it to work, I have abandoned the class Nada effort.

• neat idea, but probably would never have used it

• trying to get __set__ method correct not worth the effort

• decided its use case was not worth the effort to maintain it

singletons.sentinel

Extended class Sentinel from declaring distinct singletons with strings to declaring them with any hashable type.