[Python-Dev] type.__subclasses__() doesn't work

Steven D'Aprano steve at pearwood.info
Wed Oct 9 13:34:12 CEST 2013


On Wed, Oct 09, 2013 at 12:20:18PM +0200, Antoine Pitrou wrote:
> 
> Hello,
> 
> Just noticed the following quirk:
> 
> >>> type.__subclasses__()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: descriptor '__subclasses__' of 'type' object needs an argument
> 
> Yet it would be nice to know about the subclasses of type.

py> type.__subclasses__(type)
[<class 'abc.ABCMeta'>, <class 'string._TemplateMetaclass'>]


-- 
Steven


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