Bugs item #1400227, was opened at 2006-01-09 05:04 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1400227&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: Python 2.4 Status: Open Resolution: None Priority: 5 Submitted By: Collin Winter (collinwinter) Assigned to: Nobody/Anonymous (nobody) Summary: 'is' does not work on methods Initial Comment: As of Python 2.4.2 (gcc 3.3.6, linux 2.6.13), the 'is' comparison operator does not work on instancemethods or classmethods (though it does work on staticmethods). For example: """ >>> class A(object): ... def foo(self): pass ... >>> id(A.foo) == id(A.foo) True >>> A.foo is A.foo False >>> >>> a = A() >>> id(a.foo) == id(a.foo) True >>> a.foo is a.foo False """ This example is applicable to old-style classes and new-style classes, though things get more complicated in the case of built-in types: """ >>> d = dict() >>> id(d.update) == id(d.update) True >>> d.update is d.update False >>> >>> id(dict.update) == id(dict.update) True >>> dict.update is dict.update True """ However, using the classmethod 'fromkeys': """ >>> d = dict() >>> id(d.fromkeys) == id(d.fromkeys) True >>> d.fromkeys is d.fromkeys False >>> >>> id(dict.fromkeys) == id(dict.fromkeys) True >>> dict.fromkeys is dict.fromkeys False """ ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1400227&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
