New submission from Reuben Thomas :
By changing one line of AutoNumber:
def __new__(cls):
to
def __new__(cls, *args):
Enums derived from AutoNumber can now support constructors that take named arguments; for example:
class Color(AutoNumber):
def __init__(self, pantone=None):
self.pantone = pantone or 'unknown'
class Swatch(Color):
AUBURN = ('3497')
SEA_GREEN = ('1246')
BLEACHED_CORAL = () # New color, no Pantone code yet!
Without the change, one gets the error:
TypeError: __new__() takes 1 positional argument but 2 were given
I attach runnable demonstration code.
----------
assignee: docs@python
components: Documentation
files: foo.py
messages: 343607
nosy: docs@python, rrt
priority: normal
severity: normal
status: open
title: `AutoNumber` class in enum documentation: support *args in constructor
versions: Python 3.8
Added file: https://bugs.python.org/file48365/foo.py
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Python tracker
https://bugs.python.org/issue37062
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Ethan Furman