class collectionish.Sentry

Bases: object

A Basic falsey singleton type useful for when None actually means something.

Only one instance of Sentry may be created (within a session). To prevent weirdness in with import reloads or multiprocessing we test equality / based on is tested based on class membership and disallow subclassing.

The following actions are is forbidden on the Sentry type:
  • subclassing
  • setting attributes

Initialize self. See help(type(self)) for accurate signature.