[issue15870] PyType_FromSpec should take metaclass as an argument

[Alexander Belopolsky]

Alexander Belopolsky added the comment:

On Sep 6, 2012, at 6:25 PM, Martin v. Löwis <report at bugs.python.org> wrote:

> I'm -1 on calling it PyType_FromSpecEx.

I find it encouraging that you commented on the choice of name. :-) I can live with PyType_FromMetatypeAndSpec and leave out bases.  PyType_FromTypeAndSpec is fine too. 

On the substance, I don't think this API is just convenience.  In my application I have to replace meta type after my type is created with PyType_FromSpec. This is fragile and works only for very simple metatypes.

Let's get back to this discussion once I have a ctypes patch.  I there will be a work-around for ctypes it will probably work for my case. (My case is a little bit more complicated because I extend the size of my type objects to store custom metadata.  Ctypes fudge this issue by hiding extra data in a custom tp_dict. )

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15870>
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