[Python-Dev] Preserving the definition order of class namespaces.

Guido van Rossum guido at python.org
Sun May 24 07:32:27 CEST 2015

But isn't that also a problem? It would make the existence of that member a
bit unpredictable.

On Saturday, May 23, 2015, Larry Hastings <larry at hastings.org> wrote:

> On 05/23/2015 09:46 PM, Guido van Rossum wrote:
> How will __definition_order__ be set in the case where __prepare__ doesn't
> return an OrderedDict? Or where a custom metaclass's __new__ calls its
> superclass's __new__ with a plain dict? (I just wrote some code that does
> that. :-)
> In his patch, type_new tests to see if the dict passed in is an ordered
> dict (PyODict_Check).  __definition_order__ is only created and populated
> if it passes the test.
> http://bugs.python.org/file39446/odict-class-definition-namespace.diff
> */arry*

--Guido van Rossum (on iPad)
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