[Python-3000] PEP 31XX: A Type Hierarchy for Numbers (and other algebraic entities) (original) (raw)

Bill Janssen janssen at parc.com
Mon Apr 30 18:01:09 CEST 2007


GvR wrote:

So how about we reduce the scope of our (!) PEP (or perhaps of a new one) to two items: (a) add @abstractmethod, and (b) overload isinstance() and issubclass()? Library authors can do everything they want with those, and we can always add a specific set of ABCs for containers and/or numbers later in the 3.0 development cycle.

-1. Adding mechanism without content seems less than ideal, despite Talin's misgivings. I'd recommend adding the base classes in, and see how they work in the earliest 3.0 releases, then modify them as necessary in subsequent releases.

Bill



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