Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!ecngs!feeder2.ecngs.de!newsfeed.freenet.ag!news2.euro.net!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 0.006 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'definitions': 0.07; 'list...': 0.07; 'though:': 0.07; 'string': 0.09; '[1,': 0.09; 'cc:addr:python-list': 0.11; 'python': 0.11; 'def': 0.12; 'itself.': 0.14; 'expression,': 0.16; 'merely': 0.16; 'sorting': 0.16; 'sorts': 0.16; 'to:name:tim chase': 0.16; 'wrote:': 0.18; 'cc:addr:python.org': 0.22; 'logical': 0.24; 'cc:2**0': 0.24; 'sort': 0.25; 'define': 0.26; 'pass': 0.26; 'header:In-Reply- To:1': 0.27; 'tim': 0.29; "doesn't": 0.30; 'list:': 0.30; 'message-id:@mail.gmail.com': 0.30; '>>>>': 0.31; 'asks': 0.31; 'chase': 0.31; "d'aprano": 0.31; 'int,': 0.31; 'steven': 0.31; 'class': 0.32; 'skip:_ 10': 0.34; 'common': 0.35; 'received:google.com': 0.35; 'words,': 0.36; 'doing': 0.36; 'subject:?': 0.36; 'being': 0.38; 'how': 0.40; 'number,': 0.60; "you're": 0.61; 'more': 0.64; 'nobody': 0.68; 'square': 0.74; 'power': 0.76; 'multiplying': 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=bSonapMBuKyT954eqGrt/ehAIUAkIAVVurHwtwJm0X8=; b=fSLBPQppIQAHpoLuBj+4J7Svl7w5DMZpU/u0dgqZUNKgKUHca5GamHO2huB+qqK8BG o4lIbosSNAhIgLDnGGmowM5hhCvcvEMZqRBFRUfEL3EyMlCKuV89b01G1BHeJQho3RCS FK7+nPtAKoMIZ56sVn6b5QduxYmOpOnCclr7AV5IQsXqlM9ivPdLFcpW0Z3j2E7w5Xs2 5YS/KKhTsvHrF4xKGlVfLjLxctVLy/PKOKhcqchZivXnRk5ECgRGZ0e5+ySR/4tNMZ1G VDhg9fdoNEghlVFVp+4voMVLqeqEqcgoaOpGRc8dv+zTZlLPaazGlwPpirJgR19lt/JE aFmQ== X-Received: by 10.112.52.97 with SMTP id s1mr8857069lbo.8.1372536201694; Sat, 29 Jun 2013 13:03:21 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20130629144258.79e86bb0@bigbox.christie.dr> References: <2a2072e3-4b12-4ada-872c-1240d2379928@googlegroups.com> <51CEE8E9.4070703@gmail.com> <51CF1309.1010504@rece.vub.ac.be> <51cf332f$0$29999$c3e8da3$5496439d@news.astraweb.com> <20130629144258.79e86bb0@bigbox.christie.dr> From: Joshua Landau Date: Sat, 29 Jun 2013 21:02:41 +0100 Subject: Re: Closures in leu of pointers? To: Tim Chase Content-Type: text/plain; charset=UTF-8 Cc: python-list 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: 42 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1372536209 news.xs4all.nl 15875 [2001:888:2000:d::a6]:49774 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:49460 On 29 June 2013 20:42, Tim Chase wrote: > On 2013-06-29 19:19, Steven D'Aprano wrote: >> Nobody ever asks why Python doesn't let you sort an int, or take >> the square of a list... > > just to be ornery, you can sort an int: > >>>> i = 314159265 >>>> ''.join(sorted(str(i))) > '112345569' To be yet more ornery, you are merely sorting the string representation of an int. You can sort an int, though: [1].sort() You may say "No! You are sorting a *list*!" However, is it not fair to say that with: [1, 2, 3, 4, 5].sort() you are sorting integers? That is just a common english idiom. Hence, "[1].sort()" sorts an int. > And I suppose, depending on how you define it, you can square a list: >From Wikipedia, "a square is the result of multiplying a number, or other expression, by itself. In other words, squaring is exponentiation to the power 2." This means that the only logical definitions would be "list*list" and "list**2". However, it can be done! class PowList(list): def __pow__(self, other): pass PowList([1, 2, 3])**2 // Because being a pedant is more fun when you're doing it competitively //