Steven D'Aprano wrote: > On Sat, Mar 05, 2022 at 11:27:44AM +0200, Serhiy Storchaka wrote: > > Currently the class can inherit from arbitrary objects, not only types. > > Is that intentionally supported? > I know that metaclasses do not have to be actual classes, they can be > any callable with the correct signature, but I didn't know that classes > can inherit from non-classes.
zope.interface relies on this behaviour. py> from zope.interface import Interface py> class IFoo(Interface): ... def a_method(): ... """Does stuff""" ... py> type(Interface) <class 'zope.interface.interface.InterfaceClass'> py> type(IFoo) <class 'zope.interface.interface.InterfaceClass'> py> isinstance(IFoo, type) False py> isinstance(Interface, type) False _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/EOEFTHD4POWRCT7FGBE5WT6IZGZNG2LX/ Code of Conduct: http://python.org/psf/codeofconduct/
