[Python-Dev] Accepting PEP 560 -- Core support for typing module and generic types (original) (raw)

Guido van Rossum guido at python.org
Thu Dec 14 19:03:48 EST 2017

A slot is pretty expensive, as every class in existence will be another 8 bytes larger (and possibly more due to malloc rounding). So unless we find that there's a significant performance benefit I think we should hold back on this. IIRC Ivan has already measured an order of magnitude's speedup (well, 7x), so we may not need it. :-)

On Thu, Dec 14, 2017 at 3:49 PM, Yury Selivanov <yselivanov.ml at gmail.com> wrote:

Ivan, Guido,

Would it be possible to add a slot so that types defined in C can implement classgetitem? static PyClassMethodDef classmethods = { fooclassgetitem /* cmclassgetitem */ } static PyTypeObject Foo = { .tpclassmethods = classmethods } Yury On Mon, Dec 4, 2017 at 5:18 PM, Ivan Levkivskyi <levkivskyi at gmail.com> wrote: > Thank you! It looks like we have a bunch of accepted PEPs today. > It is great to see all this! Thanks everyone who participated in discussions > here, on python-ideas and > on typing tracker. Special thanks to Mark who started this discussion. > > -- > Ivan > > > _> ________________________ > Python-Dev mailing list > Python-Dev at python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > https://mail.python.org/mailman/options/python-dev/ yselivanov.ml%40gmail.com >

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