Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!bcyclone03.am1.xlned.com!bcyclone03.am1.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 0.044 X-Spam-Evidence: '*H*': 0.91; '*S*': 0.00; 'inherited': 0.09; '*never*': 0.16; 'multitude': 0.16; 'subject:Classes': 0.16; 'thread,': 0.16; 'width,': 0.16; 'width.': 0.16; 'wrote:': 0.18; 'email addr:gmail.com>': 0.22; 'imposed': 0.24; 'question': 0.24; 'header:In-Reply-To:1': 0.27; 'tim': 0.29; 'message- id:@mail.gmail.com': 0.30; "i'm": 0.30; 'option.': 0.31; 'class': 0.32; 'probably': 0.32; 'to:name:python-list': 0.33; 'equal': 0.35; 'late': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'whilst': 0.36; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'length': 0.61; 'useful.': 0.68; 'square': 0.74; 'partially': 0.84 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=U4wSaFHgdBsaNfZdCGh8lcUcArgmfCDilurV/5umxjA=; b=T2ZFGgPz4Cb2LalYK4GCC7ttStmZu46IWto6Hbv1ICvtbfTSexoCLM3jnjNsH1BzfX /sU0/+CChR9/zup+zaDTvOhqN9FLeeMuTJXRMoCltUdUVgq2Unok/UUzrtFJKGrnjKUc sbZTgdl4UMQJG7N8Zjemm55zdwJqsTEo961H7lMR/vEkSXq7iIg/05sn8y7cdZGOhF95 HysQakzr525b9xbqpPY8I3djui2GUmAJcthSkK8Bd+sA+JoVWe9lf77s+/Pq/WORJTqn QfzXEhZrwgjkRoJPhsZoRFwHoVqlMd3MJqRW8Nde15FQkWFwSmOOQys3J67zz3LMklm7 +5tA== MIME-Version: 1.0 X-Received: by 10.60.52.177 with SMTP id u17mr30636633oeo.14.1414924334099; Sun, 02 Nov 2014 02:32:14 -0800 (PST) In-Reply-To: References: <5453c1a6$0$12981$c3e8da3$5496439d@news.astraweb.com> <7pg75alj1qn97hlirk81f7nqd265emgu05@4ax.com> <20141031104319.02e1ca6f@rg.highlandtechnology.com> <2i585a5s6d1aagbh6ot2b88i51o8jhq0db@4ax.com> Date: Sun, 2 Nov 2014 21:32:13 +1100 Subject: Re: Classes From: Tim Delaney To: Python-List Content-Type: multipart/alternative; boundary=001a1133056a5173090506ddbe6e 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: 44 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1414924342 news.xs4all.nl 2967 [2001:888:2000:d::a6]:34901 X-Complaints-To: abuse@xs4all.nl X-Received-Bytes: 5521 X-Received-Body-CRC: 1603522577 Xref: csiph.com comp.lang.python:80115 --001a1133056a5173090506ddbe6e Content-Type: text/plain; charset=UTF-8 On 2 November 2014 20:50, Denis McMahon wrote: > > The question (I thought) was to write a class for Square that inherited a > class Rectangle but imposed on it the additional constraints of a square > over a rectangle, namely that length == width. > I'm late to the party and this has already been partially addressed in the thread, but it always annoys me. A square is as much a rhombus with 90 degree angles as it is a rectangle with equal length and width, and yet I *never* see the former given as an option. If course, that's probably because rectangles have a multitude of uses for user interfaces, whilst other quadrilaterals are somewhat less useful. Tim Delaney --001a1133056a5173090506ddbe6e Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On 2= November 2014 20:50, Denis McMahon <denismfmcmahon@gmail.com&g= t; wrote:

The question (I thought) was to write a class for Square that inherited a class Rectangle but imposed on it the additional constraints of a square over a rectangle, namely that length =3D=3D width.
I'm late to the party and this has already been partially a= ddressed in the thread, but it always annoys me. A square is as much a rhom= bus with 90 degree angles as it is a rectangle with equal length and width,= and yet I *never* see the former given as an option.

<= div>If course, that's probably because rectangles have a multitude of u= ses for user interfaces, whilst other quadrilaterals are somewhat less usef= ul.

Tim Delaney=C2=A0
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