Bugs item #1204734, was opened at 2005-05-19 05:21 Message generated for change (Comment added) made by arigo You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1204734&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: John Eikenberry (zhar) Assigned to: Nobody/Anonymous (nobody) Summary: Documentation error? Initial Comment: >From http://www.python.org/dev/doc/devel/ref/new-style-attribute-access.html "Called unconditionally to implement attribute accesses for instances of the class. If the class also defines __getattr__, it will never be called (unless called explicitly)." But I'm not seeing this behaviour in python-2.3.5 and python-2.4.1 on Linux. class A(object): def __getattr__(self,key): print '__getattr__',key raise AttributeError,key def __getattribute__(self,key): print '__getattribute__',key raise AttributeError,key a = A() a.foo $ python test.py __getattribute__ foo __getattr__ foo Traceback (most recent call last): File "test.py", line 14, in ? a.foo File "test.py", line 7, in __getattr__ raise AttributeError(key) AttributeError: foo It seems to be calling __getattribute__ as it should, but then it falls back on __getattr__ even though the docs specifically say it shouldn't. ---------------------------------------------------------------------- >Comment By: Armin Rigo (arigo) Date: 2005-05-23 14:28 Message: Logged In: YES user_id=4771 Indeed, the logic in typeobject.c is to call __getattribute__ and fall back on __getattr__ if the former raised an AttributeError. This is necessary because all objects have a __getattribute__, actually, as there is one in the 'object' base class. This let me think that the error is really in the documentation, which should mention this logic. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1204734&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
