This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author daniel.urban
Recipients daniel.urban, della, terry.reedy
Date 2010-08-13.15:57:46
SpamBayes Score 3.51276e-06
Marked as misclassified No
Message-id <>
def ...
doesn't work because classmethod objects doesn't have a __dict__, so setting arbitrary attributes don't work, and abstractmethod tries to set the __isabstractmethod__ atribute to True.

The other order:
def ...
doesn't work, because the abstractmethod decorator sets the function's __isabstractmethod__ attribute to True, but when ABCMeta.__new__ checks the object in the namespace of the class, it won't find it, because the classmethod object won't have an __isabstractmethod__ attribute.

The situation is the same with staticmethod.

One possible solution would be adding a descriptor to classmethod (and staticmethod), with the name "__isabstractmethod__", which on __get__ would check its underlying callable for this attribute, and on __set__ would set this attribute on that callable. I think this way both order should work.
Date User Action Args
2010-08-13 15:57:49daniel.urbansetrecipients: + daniel.urban, terry.reedy, della
2010-08-13 15:57:48daniel.urbansetmessageid: <>
2010-08-13 15:57:47daniel.urbanlinkissue5867 messages
2010-08-13 15:57:47daniel.urbancreate