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

[Jim Jewett]

On 4/26/07, Guido van Rossum <guido at python.org> wrote:
> I now have a proposal to allow overloading isinstance() and
> issubclass(), by defining special (class) methods on the second
> argument. See http://python.org/sf/1708353. Does this need a PEP?

It needs to be mentioned in the ABC PEP; whether it needs its own PEP
is probably up to you.

-jJ