OTOH daytaclass is a decorator for *better* metaclass compatibility. On Dec 10, 2017 13:17, "Antoine Pitrou" <solip...@pitrou.net> wrote:
> On Sun, 10 Dec 2017 20:47:45 +0100 > Antoine Pitrou <solip...@pitrou.net> wrote: > > > Hi, > > > > On Sun, 10 Dec 2017 19:17:25 +0000 > > Tin Tvrtković <tinches...@gmail.com> wrote: > > > Hello, > > > > > > I'm one of the attrs contributors, and the person who initially wrote > the > > > slots functionality there. > > > > > > We've given up on returning a new class always since this can conflict > with > > > certain metaclasses (have you noticed you can't make a slots attrs > class > > > inheriting from Generic[T]?) and with PEP 487. I think with PEP 487 > it's > > > becoming especially evident class creation is not necessarily an > idempotent > > > operation. > > > > Hmm... I understand you may be restricted by backwards compatibility > > here. But dataclasses don't have that issue, so we could decide we're > > incompatible with certain dataclasses from day 1. > > Sorry... make that "incompatible with certain metaclasses" ;-) > > Regards > > Antoine. > > > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: https://mail.python.org/mailman/options/python-dev/ > guido%40python.org >
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