Path: csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed2.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 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'encoding': 0.05; 'subject:Python': 0.06; 'referring': 0.07; 'sys': 0.07; 'bytes.': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'terms,': 0.09; 'python': 0.11; '.........': 0.16; 'alphabet': 0.16; 'encoding.': 0.16; 'encodings': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'semantics': 0.16; 'utf8': 0.16; 'wrote:': 0.18; '>>>': 0.22; 'import': 0.22; 'header:User- Agent:1': 0.23; 'bytes': 0.24; 'unicode': 0.24; '(or': 0.24; 'source': 0.25; 'define': 0.26; 'skip:v 30': 0.26; 'skip:_ 20': 0.27; 'header:X-Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; 'skip:p 30': 0.29; "doesn't": 0.30; 'skip:( 20': 0.30; 'code': 0.31; 'waters': 0.31; 'says': 0.33; 'but': 0.35; 'sequence': 0.36; 'should': 0.36; 'mapping': 0.38; 'to:addr :python-list': 0.38; 'to:addr:python.org': 0.39; 'either': 0.39; 'received:org': 0.40; "you'll": 0.62; 'more': 0.64; 'between': 0.67; 'rendering': 0.68; 'subjectcharset:utf-8': 0.72; 'received:109': 0.72; 'batchelder': 0.84; 'confusing': 0.84; 'everything.': 0.84; 'subject::': 0.85 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Robin Becker Subject: Re: =?UTF-8?B?J1N0cmHDn2UnICgnU3RyYXNzZScpIGFuZCBQeXRob24gMg==?= Date: Wed, 15 Jan 2014 12:50:10 +0000 References: <30dfa6f1-61b2-49b8-bc65-5fd18d498c38@googlegroups.com> <52D67873.2010502@chamonix.reportlab.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Gmane-NNTP-Posting-Host: 109.174.168.73 User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 In-Reply-To: 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: 36 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1389790224 news.xs4all.nl 2882 [2001:888:2000:d::a6]:48020 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:63977 On 15/01/2014 12:13, Ned Batchelder wrote: ........ >> On my utf8 based system >> >> >>> robin@everest ~: >>> $ cat ooo.py >>> if __name__=='__main__': >>> import sys >>> s='A̅B' >>> print('version_info=%s\nlen(%s)=%d' % (sys.version_info,s,len(s))) >>> robin@everest ~: >>> $ python ooo.py >>> version_info=sys.version_info(major=3, minor=3, micro=3, >>> releaselevel='final', serial=0) >>> len(A̅B)=3 >>> robin@everest ~: >>> $ >> >> ........ > You are right that more than one codepoint makes up a grapheme, and that you'll > need code to deal with the correspondence between them. But let's not muddy > these already confusing waters by referring to that mapping as an encoding. > > In Unicode terms, an encoding is a mapping between codepoints and bytes. Python > 3's str is a sequence of codepoints. > Semantics is everything. For me graphemes are the endpoint (or should be); to get a proper rendering of a sequence of graphemes I can use either a sequence of bytes or a sequence of codepoints. They are both encodings of the graphemes; what unicode says is an encoding doesn't define what encodings are ie mappings from some source alphabet to a target alphabet. -- Robin Becker