[docs] [issue27877] Add recipe for "valueless" Enums to docs

[Berker Peksag]

Changes by Berker Peksag <berker.peksag at gmail.com>:


----------
resolution:  -> fixed
stage:  -> resolved
status: open -> closed

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27877>
_______________________________________