Path: csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed3a.news.xs4all.nl!xs4all!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 0.007 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'argument': 0.05; 'affected': 0.07; 'debug': 0.07; 'string': 0.09; 'global,': 0.09; 'occasionally': 0.09; 'will,': 0.09; 'cc:addr:python-list': 0.11; 'assume': 0.14; '24,': 0.16; 'braces': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'subject:class': 0.16; 'wider': 0.16; 'wrote:': 0.18; 'variable': 0.18; 'cc:addr:python.org': 0.22; 'mon,': 0.24; 'cc:2**0': 0.24; 'second': 0.26; 'least': 0.26; 'header:In-Reply-To:1': 0.27; 'message-id:@mail.gmail.com': 0.30; 'code': 0.31; '(usually': 0.31; 'quite': 0.32; 'comment': 0.34; 'maybe': 0.34; 'but': 0.35; 'received:google.com': 0.35; 'c++': 0.36; 'list': 0.37; 'nov': 0.38; 'pm,': 0.38; 'extremely': 0.39; 'dave': 0.60; 'skip:* 10': 0.61; 'simple': 0.61; 'first': 0.61; 'line,': 0.68; 'useful.': 0.68; 'subject:have': 0.80; 'shadows': 0.84; 'angel': 0.91; 'to:none': 0.92 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:cc :content-type; bh=zCChAQMc6fpYYA4emdQbLDYmI831KQBwjkSdyt/FGt0=; b=veDe+/+Tfx8ta/wwA2Wun+i1aF0Mdl0IaEXNHzkoakw0SRZarmUc+Xzume5smOLkXQ 90GU27HGcVbn7QPH0ccMDo/ccF702W2z/j/IHfa2NF+E7YMR8VH/9jKq6Y4nC+osiQKd ar0zStrV3uGOs95iY1DihFUAEwBv6PdWfqqp9Ya0SI+RTRSXBoAoerC/J5FFrjkNCmCU 3qV7k9xZYpGDp+qPG3O8Legwd3jh7mLOhHkhixeLMrWhWbEmNoiE6fl0BTMpK+MkdaGU KO5KVktZz69wkCJjnr2evZMR48m9C7mrMGVBKRah7g7kQM3bqAM9L3cwyzl4PrZNLeh6 3ErQ== MIME-Version: 1.0 X-Received: by 10.42.110.195 with SMTP id r3mr22934208icp.12.1416806505164; Sun, 23 Nov 2014 21:21:45 -0800 (PST) In-Reply-To: <5472BE0D.701@davea.name> References: <2qn27adjq412n9nff9kv5jh25d1ekkbncp@4ax.com> <8d047ahkrb4uh4qpq1uk74tel4nfc4s8uv@4ax.com> <66b13454-3503-4111-bf8e-58ce79ef00aa@googlegroups.com> <5472b24c$0$12979$c3e8da3$5496439d@news.astraweb.com> <5472BE0D.701@davea.name> Date: Mon, 24 Nov 2014 16:21:45 +1100 Subject: Re: I have no class From: Chris Angelico Cc: "python-list@python.org" Content-Type: text/plain; charset=UTF-8 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: 28 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1416806507 news.xs4all.nl 2970 [2001:888:2000:d::a6]:47271 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:81433 On Mon, Nov 24, 2014 at 4:11 PM, Dave Angel wrote: > The case I found astounding in C++ was in the initializer list where the > line > > value:value > > would assume that the first one was this->value, and the second was a local > named value (usually an argument to the constructor). That's occasionally quite useful. You can create a variable which shadows another, and reference the original in its initialization, as a simple means of mocking for debug: //Maybe a global, or at least at wider scope string separator="whatever... maybe pulled from a MIME document"; ... { string separator="** DEBUG **"+separator+"** DEBUG **"; ... code using separator ... } You can comment or uncomment the debug line, and everything inside the braces will be affected by its alteration - but nothing outside them will, because it's shadowed and not altered. Can be extremely handy. ChrisA