On 29 April 2013 20:04, Guido van Rossum <gu...@python.org> wrote: > On Mon, Apr 29, 2013 at 11:34 AM, Larry Hastings <la...@hastings.org> wrote: >> What's the problem with overriding the isinstance checks? You mention it >> but seem to assume it's a bad idea. That seems to me like it'd adequately >> solve that problem with an acceptable level of magic. > > Depending on whether you are using isinstance() to check if an enum > value belongs in the set of acceptable enums, or to check it it makes > sense to call a certain method, you need isinstance() to behave > differently.
Would it not be better to avoid using isinstance() for this? I would have expected membership testing to use "Red in Colors" rather than "isinstance(Red, Color)" like in this stackoverflow question about an enum class: http://stackoverflow.com/questions/10445819/overriding-contains-method-for-a-class Oscar _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
