Bugs item #1350060, was opened at 2005-11-07 08:55 Message generated for change (Comment added) made by arigo You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1350060&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: Python Interpreter Core Group: None Status: Open Resolution: None Priority: 5 Submitted By: Armin Rigo (arigo) Assigned to: Armin Rigo (arigo) Summary: built-in method .__cmp__ Initial Comment: Bound methods of built-in objects have a strange __cmp__/__hash__ combination: they compare equal only if their __self__ are identical, but they hash based on the hash of __self__ instead of its _Py_HashPointer(). Built-in methods should consistently be based on the identity *or* the equality of __self__. For reference, regular instance methods are based on the equality. So I propose to fix built-in method objects in the same way. ---------------------------------------------------------------------- >Comment By: Armin Rigo (arigo) Date: 2006-04-21 16:41 Message: Logged In: YES user_id=4771 I've just been bitten by this problem. It's an arguably reasonable use case about why instance methods should work like immutable containers (they are immutable, after all) in the sense that equality should be structural. If nobody object I will check in a fix that makes instance methods and built-in instance methods compare their 'self' recursively. ---------------------------------------------------------------------- Comment By: Armin Rigo (arigo) Date: 2005-12-01 10:40 Message: Logged In: YES user_id=4771 Sorry, my mistake: regular instance methods behave like built-in methods. They are both based on the identity of their 'self' but use its hash to compute their own hash. This bug report is thus only about why should the hash of methods and built-in methods depend on the hash of their 'self'. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1350060&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
