Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!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 0.013 X-Spam-Evidence: '*H*': 0.97; '*S*': 0.00; 'form?': 0.09; 'raises': 0.09; 'subject:using': 0.09; 'cc:addr:python-list': 0.11; 'python': 0.11; 'def': 0.12; 'codebase,': 0.16; 'reason.': 0.16; 'subject:class': 0.16; 'subject:member': 0.16; 'twisted': 0.16; 'sat,': 0.16; 'wrote:': 0.18; 'pfxlen:0': 0.19; 'cc:addr:python.org': 0.22; 'cc:2**0': 0.24; "i've": 0.25; 'certain': 0.27; 'header:In-Reply-To:1': 0.27; 'wondering': 0.29; 'raise': 0.29; "doesn't": 0.30; 'message-id:@mail.gmail.com': 0.30; 'class': 0.32; 'alone': 0.33; 'but': 0.35; 'received:google.com': 0.35; 'really': 0.36; 'pm,': 0.38; 'matter': 0.61; "you're": 0.61; 'times': 0.62; 'to:addr:gmail.com': 0.65; 'idiom': 0.84; 'situations,': 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:from:date:message-id:subject:to :cc:content-type; bh=0XTCt6F4ue2+UgXGxR0sHiHdJ2oVUpRXGtZqFRrypRo=; b=YF11jTXZd+/+4gHc2dIcCshKesFHh8FiNvARUOq8X0AGcJqsjsv5h1ip5U9zr4wPCK aBNA42FCygwZiKxZmQlTFZcD2QO0l+/KzOhQw6aZ/FdODfbGITobF+lPau6lmJax1qYk m4r/hti9zkh+g0/iYjvY0m80X/+qnkR+DtaW2eWC6NwE6+1IDdvSDXQhwiWHWsvugw86 XfrFHkIVbj7YWzh9AKYV2X3qwULu5HDRtArUq2hF+bvIAxZQKoWWtOL9H3t9SXMqhDcn XSJQiE6jRb93RBPC/1sRH6zr5evBtKJ0z36mqH/Fz+hcrcC8vI8mA7yj4+MRJ6Pr2GKu MZFQ== X-Received: by 10.224.151.140 with SMTP id c12mr2339320qaw.94.1382279287106; Sun, 20 Oct 2013 07:28:07 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: From: Devin Jeanpierre Date: Sun, 20 Oct 2013 07:27:27 -0700 Subject: Re: skipping __init__ and using exploiting a class member instead To: Peter Cacioppi Content-Type: text/plain; charset=UTF-8 Cc: "comp.lang.python" 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: 19 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1382279618 news.xs4all.nl 15951 [2001:888:2000:d::a6]:36254 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:57150 On Sat, Oct 19, 2013 at 2:44 PM, Peter Cacioppi wrote: > Is the following considered poor Python form? > > class Foo (object) : > _lazy = None > def foo(self, x) : > self._lazy = self._lazy or self.get_something(x) > def get_something(self, x) : > # doesn't really matter > > I like this idiom for certain situations, just wondering if it will raise the hackles of other Pythonistas. It raises my hackles, but not for any good reason. I've seen it a number of times in the Twisted codebase, so you're not alone in using it. -- Devin