On Wed, 25 Apr 2007 18:10:23 -0400, Jim Jewett <[EMAIL PROTECTED]> wrote: >The current ABC proposal is to use isinstance as the test; Jeffrey >Yaskin's numbers PEP highlighted the weakness there with a concrete >example. > >If you need to an abstraction less powerful than an existing ABC, >you're out of luck; you can't just assert that the existing class is >already sufficient, nor can you expect everyone else to use multiple >annotations.
I'm sure everyone is already aware of the behavior of the classImplements and directlyProvides functions available in zope.interface, which exactly satisfy this use-case in the interface world. Jean-Paul _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
