[Python-Dev] PEP 435 - requesting pronouncement (original) (raw)

Philip Jenvey pjenvey at underboss.org
Sun May 5 18:50:14 CEST 2013

On May 5, 2013, at 6:44 AM, Ethan Furman wrote:

On 05/05/2013 03:05 AM, Antoine Pitrou wrote:

I still would like to see Nick's class-based API preferred over the functional API:

class Season(Enum, members='spring summer autumn'): pass The PEP doesn't even mention it, even though you got significant pushback on the proposed getframe() hack for pickling (including mentions that IronPython and Cython may not support it), and nobody seemed to be unhappy with the class-based proposal.

+1

Agreed that the PEP should mention it. -1 on using it. We don't need two different ways to use class syntax. The functional interface is there for two reasons: - to easily create enums dynamically (fairly rare, I'm sure) - to easily create enums when prototyping or at the interactive prompt (I'll use it all the time -- it's convenient! ;)

I don't understand, the class based API is perfectly fine for prototyping in the repl.

For dynamic creation, the class API always provides a functional API for free:

import types types.new_class('Season', (Enum,), dict(values='spring summer autumn'))

It's not convenient, but that doesn't matter because this usage is rare anyway. Certainly much rarer than declarations of auto-numbered enums.

-- Philip Jenvey

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