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Groups > comp.lang.python > #49378
| From | Thomas Heller <theller@ctypes.org> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: Problems with subclassing enum34 |
| Date | 2013-06-28 17:25 +0200 |
| Message-ID | <b35o16Fu6l8U1@mid.individual.net> (permalink) |
| References | <b357q6Fql37U1@mid.individual.net> <mailman.3961.1372432574.3114.python-list@python.org> |
Am 28.06.2013 17:16, schrieb Ethan Furman: > On 06/28/2013 03:48 AM, Thomas Heller wrote: >> trying out the enum34 module. >> >> What I want to create is a subclass of enum.Enum that is also based >> on ctypes.c_int so that I can better use enum instances in ctypes >> api calls. > > Have you tried using enum.IntEnum? If you were able to pass ints in > before, IntEnum should work. I'm sure that IntEnum works as expected, but I need enums that are subclasses of ctypes.c_int (so that argument type checking and return value conversions in ctypes api calls work). Robert Kern: > > enum.EnumMeta uses super() in its __new__() implementation but > _ctypes.PyCSimpleType doesn't. Thus, only > _ctypes.PyCSimpleType.__new__() gets a chance to run. Switching the > order of the two might work. > Robert found the problem but I'm unsure if there is a solution. Also I'm unsure whether this is a bug in ctypes or in enum or if they are simply incompatible. Thomas
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Problems with subclassing enum34 Thomas Heller <theller@ctypes.org> - 2013-06-28 12:48 +0200
Re: Problems with subclassing enum34 Robert Kern <robert.kern@gmail.com> - 2013-06-28 12:16 +0100
Re: Problems with subclassing enum34 88888 Dihedral <dihedral88888@gmail.com> - 2013-06-28 04:52 -0700
Re: Problems with subclassing enum34 Ethan Furman <ethan@stoneleaf.us> - 2013-06-28 08:16 -0700
Re: Problems with subclassing enum34 Thomas Heller <theller@ctypes.org> - 2013-06-28 17:25 +0200
Re: Problems with subclassing enum34 Thomas Heller <theller@ctypes.org> - 2013-06-28 17:32 +0200
Re: Problems with subclassing enum34 Robert Kern <robert.kern@gmail.com> - 2013-06-28 17:17 +0100
Re: Problems with subclassing enum34 Ethan Furman <ethan@stoneleaf.us> - 2013-06-28 10:09 -0700
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