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

[Greg Ewing]

Guido van Rossum wrote:
> On 4/28/07, Jean-Paul Calderone <exarkun at divmod.com> wrote:
> 
>>    >>> class X(object):
>>    ...     __class__ = property(lambda self: int)
> 
> I'm not particularly enamored with it, but I believe it once served a
> purpose for Zope. Does anyone know if it is still needed?

I thought you wanted this so that proxy objects can
pretend to be instances of the class they're proxying.

--
Greg