Path: csiph.com!usenet.pasdenom.info!news.albasani.net!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 0.003 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'syntax': 0.03; 'dict': 0.09; 'friday,': 0.09; 'literal': 0.09; 'python:': 0.09; 'subject:while': 0.09; 'to:addr:comp.lang.python': 0.09; 'cc:addr :python-list': 0.10; 'language': 0.14; '"set': 0.16; 'characters:': 0.16; 'literals.': 0.16; 'wrote:': 0.17; 'exists': 0.17; 'python?': 0.20; 'cc:2**0': 0.23; 'cc:no real name:2**0': 0.24; 'cc:addr:python.org': 0.25; 'header:In-Reply-To:1': 0.25; 'header:User-Agent:1': 0.26; 'chris': 0.28; 'another': 0.33; 'received:google.com': 0.34; 'received:209.85': 0.35; 'should': 0.36; 'two': 0.37; 'received:209': 0.37; 'received:209.85.216': 0.37; 'subject:: ': 0.38; 'provide': 0.62; 'between': 0.63; 'believe': 0.69; '2013': 0.84; 'dict.': 0.84 X-Received: by 10.49.39.99 with SMTP id o3mr706125qek.14.1360470378880; Sat, 09 Feb 2013 20:26:18 -0800 (PST) Newsgroups: comp.lang.python Date: Sat, 9 Feb 2013 20:26:18 -0800 (PST) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=70.196.110.82; posting-account=h3aEwQoAAACiuqX-oR3gvCVFm8lLHoWj References: <5002a1f9$0$29995$c3e8da3$5496439d@news.astraweb.com> <7b027612-a07e-40f9-8ad2-3e95c5440482@googlegroups.com> <86872ad2-fda0-403b-9f18-d1cb18e41860@t32g2000yqd.googlegroups.com> <50039290$0$29978$c3e8da3$5496439d@news.astraweb.com> <9309333c-13a0-464c-bd94-9c682363b8c9@googlegroups.com> <511516db$0$29969$c3e8da3$5496439d@news.astraweb.com> <62c3e7bb-d023-43b4-b759-f424707fd346@googlegroups.com> <75c82449-773e-4077-a6c9-e9cef08f845f@googlegroups.com> User-Agent: G2/1.0 X-Google-Web-Client: true X-Google-IP: 70.196.110.82 MIME-Version: 1.0 Subject: Re: Implicit conversion to boolean in if and while statements From: Rick Johnson To: comp.lang.python@googlegroups.com Content-Type: text/plain; charset=ISO-8859-1 Cc: python-list@python.org 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: , Message-ID: Lines: 12 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1360470388 news.xs4all.nl 6848 [2001:888:2000:d::a6]:45345 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:38551 On Friday, February 8, 2013 11:01:00 PM UTC-6, Chris Angelico wrote: > [...] > Another advantage of using two characters: There's no conflict between > set and dict literals. How do you notate an empty set in Python? {} > means an empty dict. What makes you believe that a language must provide literal syntax for EACH and EVERY type? And BTW, if you don't already know, this is how you notate an empty set in Python: py> set([]) set([]) IMO "Set Types" should only exists as a concequence of "freezing" an array, and should have NO literal syntax avaiable.