Éric Araujo <mer...@netwok.org> added the comment: > MappingView is a strange ABC: it should probably declare __contains__ as an > abstract method. I think that was not done because it would not be very useful: MappingView seems to exist only as a base class for the other *View, which define __contains__.
> I don't see why it doesn't inherit from Set (which would avoid the need of > declaring __contains__, > Set is a Container) whereas KeysView, ItemsView and ValuesView do inherit > from Set. Not ValuesView, because you may have the same object as more than one value. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue14386> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
