Feature Requests item #960454, was opened at 2004-05-26 00:33 Message generated for change (Comment added) made by zseil You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=355470&aid=960454&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Documentation Group: None Status: Open Resolution: None Priority: 5 Submitted By: Jim Jewett (jimjjewett) Assigned to: Nobody/Anonymous (nobody) Summary: old/new class documentation Initial Comment: The distributed documentation refers to old and new-style classes, but they do not appear in the index, and the difference is not explained. (Users who ask are referred to documentation on www.python.org, which is not currently shipped with the default distrubution.) As best I understand it, the only differences are: (1) New-style classes inherit from object. Because of this inheritance, new-style classes have a few extra capabilities, such as descriptors and super. (2) Method Resolution Order can be different in cases of multiple inheritance. (3) New style classes take precedence over old-style classes when doing rich comparison. (4) If rich comparison fails, numeric coercion will be attempted if -- and only if -- at least one of the objects is an old-style class. ---------------------------------------------------------------------- Comment By: iga Seilnacht (zseil) Date: 2006-04-10 16:07 Message: Logged In: YES user_id=1326842 This seems like a duplicate of bug #960340, which was closed when section New-style and classic classes was added to the Python Reference Manual (see http://docs.python.org/dev/ref/node33.html). ---------------------------------------------------------------------- Comment By: Edward Diener (eldiener) Date: 2004-08-02 01:53 Message: Logged In: YES user_id=490593 New style classes, with all their new attributes, member functions, static methods, and class methods, need to be documented in the official Python distribution. Included in this is the explanation of metaclasses and how to use them. Essentially Guido's paper on new style classes, reworked to fit within the existing documentation framework, should be added to the official documantation.. ---------------------------------------------------------------------- Comment By: Jim Jewett (jimjjewett) Date: 2004-05-26 17:21 Message: Logged In: YES user_id=764593 Found a new difference -- you can't assign to the __bases__ or __name__ of a new-style class, and you can't usually assign to it's __class__. ---------------------------------------------------------------------- Comment By: Jim Jewett (jimjjewett) Date: 2004-05-26 16:05 Message: Logged In: YES user_id=764593 Given that the differences are almost -- but not entirely -- extra options for new-style classes, the language lawyer section on classes (ref/7.6) might be a good location. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=355470&aid=960454&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
