I haven't had the time to look into this, but it sounds unintuitive to drop __reduce_ex__ which is supposed to be the "extended" IOW "newer" version of the API compared to __reduce__ which was deemed to be missing something.
On Thu, Jun 19, 2008 at 2:19 PM, Alexandre Vassalotti <[EMAIL PROTECTED]> wrote: > Any comment on the proposed changes? Well if no-one objects, I would > like to move forward and implement these changes: > > - Deprecate __reduce_ex__ and copyreg.pickle in 2.6 and 3.0 (with a > planned removal in 3.1). > - Make __reduce__ raise a TypeError on the condition previously > described in 3.0. > > > -- Alexandre > > > On Sun, Jun 8, 2008 at 6:26 PM, Alexandre Vassalotti > <[EMAIL PROTECTED]> wrote: >> Hello all, >> >> I would like to propose to following simplifications to the copy >> protocol (a.k.a the __reduce__ method): >> >> - Remove the type.__reduce_ex__ method and define __reduce__ method >> to take a single optional integer argument that is the pickle protocol >> version to use. And since this already the current behavior of >> __reduce__, no change is required. >> - Deprecate copyreg.pickle in favor of the __getnewargs__ special >> method. They both solve the exact same problem, but __getnewargs__ >> does it in a simpler and more robust manner. >> - Make __reduce__ raise a TypeError if the class of an instance >> derives from one or more extension type (object, list and dict >> excluded) and neither __getnewargs__ nor __getstate__ is defined. >> >> I believe that these changes will make it easier for developers to >> write classes that supports the copy protocol, which is already quite >> complex in addition of being poorly documented. Evidently, I will >> provide the patches and write the documentation for these changes. >> >> Cheers, >> -- Alexandre >> > _______________________________________________ > Python-3000 mailing list > Python-3000@python.org > http://mail.python.org/mailman/listinfo/python-3000 > Unsubscribe: > http://mail.python.org/mailman/options/python-3000/guido%40python.org > -- --Guido van Rossum (home page: http://www.python.org/~guido/) _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
