Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder5.xlned.com!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.026 X-Spam-Evidence: '*H*': 0.95; '*S*': 0.00; 'attribute': 0.07; '*args,': 0.09; 'subject:method': 0.09; 'def': 0.12; '**kwargs)': 0.16; '**kwargs):': 0.16; 'example?': 0.16; 'name):': 0.16; 'subject:when': 0.16; '>>>': 0.22; 'header:User-Agent:1': 0.23; 'instance,': 0.24; 'subject:will': 0.24; 'skip:_ 20': 0.27; 'class': 0.32; 'skip:_ 10': 0.34; 'subject:the': 0.34; 'received:google.com': 0.35; 'method': 0.36; 'subject:?': 0.36; 'received:10': 0.37; 'skip:o 20': 0.38; 'message-id:@gmail.com': 0.38; 'to:addr:python-list': 0.38; 'does': 0.39; 'to:addr:python.org': 0.39; 'skip:p 20': 0.39; 'called': 0.40; 'subject: ': 0.61; 'name': 0.63; 'chance': 0.65; 'x):': 0.84 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject :content-type:content-transfer-encoding; bh=6a6Brc5m3ToDAOsjUvCJVAMOqF5A8M3CstoJzXjbj3A=; b=E6DZVYwytf1RL2lhszH2He9lxJLPkzIHaCg5z6zj8M57YTaOXkzKDiWmyWGBtkbvyZ YQcXrZqUMbhzylIUEs7jO6RpHiAggL8G9/XxlbrUrai6oioOl2xcizZa6DxCQx1qGmp/ 5shiPe8O5YSmy0y1r64uhS4u5jdMQ7sI/TJYsLYT5xCdpnKNXjIlzPIrjg0sXj5vm1Mb GWehCBxIdibDZCvcLowp7anJK9LGWw2FWrD9FP17BuJjjq+I8/rYDbww1r9O4UYhLfLi HngwRuXFKHPx/Jw7P9BlSp7t4TlQ+m8HOgUz/7xwPkDfPuYkoByRzMs6HVHhFCnujiaY 32wA== X-Received: by 10.70.137.1 with SMTP id qe1mr3985343pdb.159.1408691329928; Fri, 22 Aug 2014 00:08:49 -0700 (PDT) Date: Fri, 22 Aug 2014 15:08:25 +0800 From: luofeiyu User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.0 MIME-Version: 1.0 To: python-list@python.org Subject: when the method __get__ will be called? Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 32 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1408691339 news.xs4all.nl 2916 [2001:888:2000:d::a6]:57338 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:76780 class C(object): a = 'abc' def __getattribute__(self, *args, **kwargs): print("__getattribute__() is called") return object.__getattribute__(self, *args, **kwargs) def __getattr__(self, name): print("__getattr__() is called ") return name + " from getattr" def __get__(self, instance, owner): print("__get__() is called", instance, owner) return self def foo(self, x): print(x) >>> x=C() >>> x.a __getattribute__() is called 'abc' >>> x.b __getattribute__() is called __getattr__() is called 'b from getattr' If call an attribute which does exist ,__getattribute__() is called If call an attribute which does not exist ,__getattribute__() is called and then __getattr__() is called ? when the __get__ method will be called?no chance for my example?