Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!goblin1!goblin2!goblin.stu.neva.ru!newsfeed.xs4all.nl!newsfeed1a.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 0.012 X-Spam-Evidence: '*H*': 0.98; '*S*': 0.00; 'cpython': 0.05; 'subject:Python': 0.06; 'subject:language': 0.09; 'unmodified': 0.09; 'cc:addr:python-list': 0.11; 'python': 0.11; 'add/remove': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'subject: \n ': 0.16; 'sat,': 0.16; 'wrote:': 0.18; 'possible,': 0.19; 'separate': 0.22; 'cc:addr:python.org': 0.22; 'port.': 0.24; '(or': 0.24; 'cc:2**0': 0.24; 'header:In-Reply-To:1': 0.27; 'am,': 0.29; "doesn't": 0.30; 'said,': 0.30; 'subject:list': 0.30; 'message-id:@mail.gmail.com': 0.30; "d'aprano": 0.31; 'steven': 0.31; 'probably': 0.32; 'another': 0.32; 'sources': 0.33; 'received:google.com': 0.35; 'rather': 0.38; 'even': 0.60; 'referred': 0.60; 'close': 0.67; 'anything.': 0.68; 'subject:this': 0.83; 'to:none': 0.92; 'hand,': 0.93; 'ports': 0.93 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=5wGtTrCuv5tsJ886pnPJp1YfEF2NGDmtdWFXYnAQxAU=; b=jxH1J+HEWLQSUTJGRQgiSUDVlbZYIU9M1hCt0FTXtiyeKLn/bXrPTJZ87vf/wzcKqi weYTbK/bNSziSgsDECuko5+0q3O5v+WCfHiIO93NziCtw94tPe9Xeib60UksSak4KyN2 kyci9aCQVVzcPFsO4789x6taYnOoy5fo3ETcslbIbJc8i4Vg0h8XLJAbG+/mkVtg8sP5 Zvf16ni6m5JSuRBjep6do1tDZXHSGJvETntLLAYgVLsKd7B9M5iBVxySFT8UEhBbVic9 uWFCmeAcwe46Ldaa1STH9rH5wC0+BJGoV7O3M4GwRyGvAtOfhd3HhqSexFgH00syeddS BGhA== MIME-Version: 1.0 X-Received: by 10.68.129.34 with SMTP id nt2mr18457894pbb.18.1396662704397; Fri, 04 Apr 2014 18:51:44 -0700 (PDT) In-Reply-To: <533f47b5$0$29993$c3e8da3$5496439d@news.astraweb.com> References: <9daf0806-02de-4447-964c-c8f8953c23e5@googlegroups.com> <5334c38e$0$29994$c3e8da3$5496439d@news.astraweb.com> <53364327$0$29994$c3e8da3$5496439d@news.astraweb.com> <53365F55.2040302@gmail.com> <533836c4$0$29994$c3e8da3$5496439d@news.astraweb.com> <533f47b5$0$29993$c3e8da3$5496439d@news.astraweb.com> Date: Sat, 5 Apr 2014 12:51:44 +1100 Subject: Re: Explanation of this Python language feature? [x for x in x for x in x] (to flatten a nested list) 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: 13 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1396662713 news.xs4all.nl 2882 [2001:888:2000:d::a6]:60485 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:69696 On Sat, Apr 5, 2014 at 11:00 AM, Steven D'Aprano wrote: > As I said, some of these may be abandoned, obsolete, experimental, or > even vapourware. Some are probably just ports of CPython to another > platform rather than completely independent implementations. Python for OS/2 is definitely just a port. It's built from as close to unmodified sources as possible, and doesn't (deliberately) add/remove any features or anything. On the other hand, there's a Python for Android which may be a separate project. (Or is that the Py4A you referred to?) ChrisA