Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed2.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; '21,': 0.07; 'c++,': 0.07; 'assumed': 0.09; 'constructor': 0.09; 'derived': 0.09; 'overwrite': 0.09; 'subject:using': 0.09; 'c++.': 0.16; 'called,': 0.16; 'called.': 0.16; 'forbid': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'overwriting': 0.16; 'subclass': 0.16; 'subject:class': 0.16; 'subject:member': 0.16; 'language': 0.16; 'wrote:': 0.18; 'certainly': 0.24; 'own.': 0.24; 'mon,': 0.24; 'header:In-Reply-To:1': 0.27; 'am,': 0.29; 'message- id:@mail.gmail.com': 0.30; 'apparently': 0.31; 'minor': 0.31; 'religious': 0.31; 'class': 0.32; 'worked': 0.33; 'board': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'add': 0.35; 'c++': 0.36; 'project': 0.37; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'simply': 0.61; 'informed': 0.78; "class's": 0.84; '2013': 0.98 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=RAxuF0WhvVSqgg7o4bMcjU5HvE56QKsLoEZWWr30RTc=; b=UaN7+Aor5Nev4tNk6p8t2YBOD/2E5z9E2/3ZHYSj9rzfu9KSUwe+ODr7WRSi6Swsc2 Zale/lc9M1ou3rZQS8PcK/nYKphziiPqjK0ObSiOzglmws+y/qS7oVde3XoL7UeMvm2s QEblvJv0uoA8LNNpg5PqyfFWG/uuWxi9mj9Y5/AMRqCw/ZiHJA4cosTM5diyzM9XwjlH LazD7Jmzw4CEYiu7g6sfIWfl7DBIoPICU9qLkgUkTd0Flt8/jnoFDeOBBbIUe3exNq3p v/bC9kgFSbkl2fOJ0ZqpVSIm/m4HjwojtDqXNkxUPbaFVQIOn46slB+3O609QCXOKy9r dzNQ== MIME-Version: 1.0 X-Received: by 10.68.108.3 with SMTP id hg3mr14093161pbb.91.1382302674003; Sun, 20 Oct 2013 13:57:54 -0700 (PDT) In-Reply-To: <0e9b51a9-bd78-4d34-b277-c463347e8e02@googlegroups.com> References: <0e9b51a9-bd78-4d34-b277-c463347e8e02@googlegroups.com> Date: Mon, 21 Oct 2013 07:57:53 +1100 Subject: Re: skipping __init__ and using exploiting a class member instead From: Chris Angelico To: python-list@python.org Content-Type: text/plain; charset=ISO-8859-1 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: 13 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1382302685 news.xs4all.nl 15950 [2001:888:2000:d::a6]:60737 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:57156 On Mon, Oct 21, 2013 at 4:57 AM, Peter Cacioppi wrote: >> You certainly don't have to write a constructor for a subclass in C++. > > Ahh, this message board is so collectively well informed (once you get past the trolls) > > The C++ project I worked on was religious about always overwriting parent class constructors. I had assumed this was because the language proper forbid it, but apparently it was just project protocol. Minor point: In C++, you don't overwrite constructors; you simply add your own. By the time a derived class's constructor is called, the parents' have all already been called. ChrisA