[Python-Dev] [PEP 576/580] Reserve one type slot for Cython
J.Demeyer at UGent.be
Mon Jul 30 10:40:00 EDT 2018
On 2018-07-30 15:35, INADA Naoki wrote:
> As repeatedly said, PEP 580 is very complicated protocol
> when just implementing callable object.
Can you be more concrete what you find complicated? Maybe I can improve
the PEP to explain it more. Also, I'm open to suggestions to make it
> It is optimized for implementing custom method object, although
> almost only Cython want the custom method type.
For the record, Numba also seems interested in the PEP:
> I'm not sure adding such complicated protocol almost only for Cython.
> If CyFunction can be implemented behind PEP 576, it may be better.
I recall my post
explaining the main difference between PEP 576 and PEP 580.
I would like to stress that PEP 580 was designed for maximum
performance, both today and for future extensions (such as calling with
native C types).
> * PEP 576 and 580 are not strictly mutually exclusive; PEP 576 may be
> accepted in addition to PEP 580
I don't think that this is a good idea: you will mostly end up with the
disadvantages of both approaches.
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