Path: csiph.com!usenet.pasdenom.info!dedibox.gegeweb.org!gegeweb.eu!nntpfeed.proxad.net!proxad.net!feeder1-2.proxad.net!usenet-fr.net!nerim.net!novso.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 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'exists.': 0.07; 'wednesday,': 0.07; '22,': 0.09; 'identifier': 0.09; 'may,': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'will,': 0.09; 'def': 0.12; 'wrote': 0.14; 'corresponds': 0.16; 'deleted,': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'subject:Self': 0.16; 'uniquely': 0.16; 'fix': 0.17; 'wrote:': 0.18; 'later': 0.20; 'memory': 0.22; 'creating': 0.23; 'circular': 0.24; 'question': 0.24; 'header:X-Complaints-To:1': 0.27; 'that.': 0.31; 'them?': 0.31; 'class': 0.32; 'probably': 0.32; 'skip:c 30': 0.32; 'sense': 0.34; 'skip:_ 10': 0.34; 'skip:d 20': 0.34; 'could': 0.34; 'problem': 0.35; 'created': 0.35; 'objects': 0.35; 'but': 0.35; 'there': 0.35; 'thanks': 0.36; 'january': 0.37; 'las': 0.37; 'being': 0.38; 'to:addr:python-list': 0.38; "couldn't": 0.39; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'most': 0.60; 'different': 0.65; 'frank': 0.68; 'special': 0.74; 'do:': 0.91 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Dave Angel Subject: Re: Self healthcheck Date: Wed, 22 Jan 2014 13:40:21 -0500 (EST) Organization: news.gmane.org References: <0d1fc1a7-c585-45ba-8c1a-0cc468712a48@googlegroups.com> <58c541ab-c6e1-45a8-b03a-8597ed7ecb48@googlegroups.com> <9729ddaa-5976-4e53-8584-6198b47b6789@googlegroups.com> X-Gmane-NNTP-Posting-Host: dpc6744192108.direcpc.com X-Newsreader: PiaoHong Usenet NewsReaders 1.36 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: 46 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1390415890 news.xs4all.nl 2857 [2001:888:2000:d::a6]:53859 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:64525 Asaf Las Wrote in message: > On Wednesday, January 22, 2014 10:56:30 AM UTC+2, Frank Millman wrote: >> >> class MainObject: >> def __init__(self, identifier): >> self._del = delwatcher('MainObject', identifier) >> class delwatcher: >> def __init__(self, obj_type, identifier): >> self.obj_type = obj_type >> self.identifier = identifier >> log('{}: id={} created'.format(self.obj_type, self.identifier)) >> def __del__(self): >> log('{}: id={} deleted'.format(self.obj_type, self.identifier)) >> If you do find that an object is not being deleted, it is then >> trial-and-error to find the problem and fix it. It is probably a circular >> reference >> >> Frank Millman > > Thanks Frank. Good approach! > > One question - You could do: > class MainObject: > def __init__(self, identifier): > self._del = delwatcher(self) > then later > > class delwatcher: > def __init__(self, tobject): > self.obj_type = type(tobject) > self.identifier = id(tobject) > ... > > when creating delwatcher. Was there special reason to not to use them? > is this because of memory is reused when objects are deleted > and created again so same reference could be for objects created > in different time slots? > I couldn't make sense of most of that. But an ID only uniquely corresponds to an object while that object still exists. The system may, and will, reuse iD's constantly. -- DaveA