At 08:04 PM 6/26/2006 -0700, Martin Maly wrote: >Thanks for the response. The code snippet I sent deals with new style >classes only so I assume that in some cases isinstance falls back to >old-style-like handling which then asks for __bases__ and __class__ etc, >possibly incorrectly so on new style classes.
Actually, it's correct behavior for isinstance() to inspect __class__, even on new-style classes. I suspect that the question of checking for __bases__ in one of the shortcut branches just didn't come up when the code was being written. This does appear to be a language design question, regarding how much of this machinery one is allowed to emulate. _______________________________________________ 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
