[Python-3000] ABC PEP isinstance issue Was: PEP 31XX: A Type Hierarchy for Numbers (and other algebraic entities)

[Guido van Rossum]

On 4/25/07, Jean-Paul Calderone <exarkun at divmod.com> wrote:
> 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.

Don't be so sure; I wasn't (aware, that is). At this point it doesn't
look like there will be an Interfaces PEP. If you want one, or if you
want to borrow specific ideas from zope.interface, now would be the
time to bring them up and enlighten the rest of us about them.

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)