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Sat May 9 02:36:44 CEST 2009 · https://mail.python.org/pipermail/python-dev/2009-May/089541.html

On Fri, May 8, 2009 at 6:14 PM, Benjamin Peterson <benjamin at python.org>wrote:

> Normally special methods use slots of the PyTypeObject struct.
> typeobject.c looks up all those methods on Python classes correctly.
> In the case of __enter__ and __exit__, the compiler generates bytecode
> to look them up, and that bytecode use PyObject_Getattr.

Would this problem apply to all special methods that don't use a slot in
PyTypeObject, then?  I know of several other examples:

__reduce__
__setstate__
__reversed__
__length_hint__
__sizeof__

(unless I misunderstand the definition of "special methods", which is
possible)

--
Daniel Stutzbach, Ph.D.
President, Stutzbach Enterprises, LLC <http://stutzbachenterprises.com>
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[Python-Dev] special method lookup: how much do we care?