[Python-Dev] PEP 575 (Unifying function/method classes) update

Nick Coghlan ncoghlan at gmail.com
Sun May 6 03:35:54 EDT 2018

On 5 May 2018 at 18:55, Jeroen Demeyer <J.Demeyer at ugent.be> wrote:

> Hello all,
> I have updated PEP 575 in response to some posts on this mailing list and
> to some discussions in person with the core Cython developers.
> See https://www.python.org/dev/peps/pep-0575/
> The main differences with respect to the previous version are:
> * "builtin_function" was renamed to "cfunction". Since we are changing the
> name anyway, "cfunction" looked like a better choice because the word
> "built-in" typically refers to things from the builtins module.
> * defined_function now only defines an API (it must support all attributes
> that a Python function has) without specifying the implementation.
> * The "Two-phase Implementation" proposal for better backwards
> compatibility has been expanded and now offers 100% backwards compatibility
> for the classes and for the inspect functions.

Thanks for this update Jeroen! If it doesn't come up otherwise, I'll try to
claim one of the lightning talk slots at the Language Summit to discuss
this with folks in person :)


Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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