Automaton provides friendly state machines for python. The goal of this library
is to provide well documented state machine classes and associated utilities.
The state machine pattern (or the implemented variation there-of) is a commonly
used pattern and has a multitude of various usages. Some of the usages for this
library include providing state & transition validation and
running/scheduling/analyzing the execution of tasks.

WWW: https://docs.openstack.org/automaton/latest/
WWW: https://github.com/openstack/automaton