Re: Micro Python -- a lean and efficient implementation of Python 3

Path	csiph.com!usenet.pasdenom.info!goblin2!goblin.stu.neva.ru!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path	<rosuav@gmail.com>
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; 'say,': 0.05; 'sufficient': 0.05; 'subject:Python': 0.06; 'subject: -- ': 0.07; 'utf-8': 0.07; 'encode': 0.09; 'cc:addr:python-list': 0.11; '(easier': 0.16; '5:00': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'reedy': 0.16; 'statement.': 0.16; 'surrogate': 0.16; 'wrote:': 0.18; 'wed,': 0.18; 'cc:addr:python.org': 0.22; 'accommodate': 0.24; 'bytes': 0.24; 'char': 0.24; 'unicode': 0.24; 'cc:2**0': 0.24; 'header:In-Reply-To:1': 0.27; 'am,': 0.29; 'character': 0.29; 'message-id:@mail.gmail.com': 0.30; 'code': 0.31; 'subject:skip:i 10': 0.31; 'problem': 0.35; 'received:google.com': 0.35; 'scheme': 0.36; 'whatever': 0.38; 'pm,': 0.38; 'that,': 0.38; 'even': 0.60; 'ian': 0.60; 'entire': 0.61; 'total': 0.65; 'believe': 0.68; 'grow': 0.77; 'understand,': 0.84; 'to:none': 0.92
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=mOEfUYG0eOHQtWxMPq/ZrWH5KYexTmtG9Cw4bQoUnz4=; b=tFhXZiPjokl0YO2+B0BDEdChma63KTQeXStE+dv/iJ2H2K7OUOi4aB26ME7SeISugQ 0TjLwIP7iDdE2LGnyFvyGMEuP0fqqu8rXjtUSs7e5Voa0i1IquPsnIsLZesWUgWY1TSx yqM3ue/ICErhkP8XMS5qFjL/RA+p3eYDKLthv8Z57lwx2/AWw1yhwNx4/JunKhKUP2wg rWkz0UXMvs/UqQnTE64IUASCdIXNlYFw5MI17JdLMhMEr/i/2docUV6R6B1739wfwB5L 9RZn67SVE0UY9I4F3qkjBfMn5uYUTA6R826bJ7d7+yvL2dT+A3LKj+8uNtZYLN3oAvJD QDMw==
MIME-Version	1.0
X-Received	by 10.221.27.8 with SMTP id ro8mr2015355vcb.30.1401865834794; Wed, 04 Jun 2014 00:10:34 -0700 (PDT)
In-Reply-To	<lmmg5o$gjb$1@ger.gmane.org>
References	<CANw+MznPsKgJiW6e_O370VUsmVVxBfQ=M_7WUyU7+wNh+-qefA@mail.gmail.com> <CAPTjJmoB0eMMMhjUz++yYV2CEv=2xUXx7P8UuRvCk7y7gB-4+Q@mail.gmail.com> <20140603194949.3147497d@x34f> <CAPTjJmrwGVaJKmzLiX8buZQmGxrGJV657Jnb7fsK7j1-pLxtVA@mail.gmail.com> <mailman.10646.1401831682.18130.python-list@python.org> <44acd692-5dcd-4e5f-8238-7fbe0de4db2a@googlegroups.com> <538eac94$0$11109$c3e8da3@news.astraweb.com> <CALwzidm5bJAs+=R6SVurwDZU948f8ERuNmHJY_822ab6ZMrgkg@mail.gmail.com> <lmmg5o$gjb$1@ger.gmane.org>
Date	Wed, 4 Jun 2014 17:10:34 +1000
Subject	Re: Micro Python -- a lean and efficient implementation of Python 3
From	Chris Angelico <rosuav@gmail.com>
Cc	"python-list@python.org" <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 <python-list.python.org>
List-Unsubscribe	<https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive	<http://mail.python.org/pipermail/python-list/>
List-Post	<mailto:python-list@python.org>
List-Help	<mailto:python-list-request@python.org?subject=help>
List-Subscribe	<https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups	comp.lang.python
Message-ID	<mailman.10683.1401865837.18130.python-list@python.org> (permalink)
Lines	26
NNTP-Posting-Host	2001:888:2000:d::a6
X-Trace	1401865837 news.xs4all.nl 2877 [2001:888:2000:d::a6]:34399
X-Complaints-To	abuse@xs4all.nl
Xref	csiph.com comp.lang.python:72605

Show key headers only | View raw

On Wed, Jun 4, 2014 at 5:00 PM, Terry Reedy <tjreedy@udel.edu> wrote:
> On 6/4/2014 1:55 AM, Ian Kelly wrote:
>>
>>
>> On Jun 3, 2014 11:27 PM, "Steven D'Aprano" <steve@pearwood.info
>> <mailto:steve@pearwood.info>> wrote:
>>  > For technical reasons which I don't fully understand, Unicode only
>>  > uses 21 of those 32 bits, giving a total of 1114112 available code
>>  > points.
>>
>> I think mainly it's to accommodate UTF-16. The surrogate pair scheme is
>> sufficient to encode up to 16 supplementary planes, so if Unicode were
>> allowed to grow any larger than that, UTF-16 would no longer be able to
>> encode all codepoints.
>
>
> I believe the original utf-8 used up to 6 bytes per char to encode 2**32
> potential chars. Just 4 bytes limits to 2**21 and for whatever reason
> (easier decoding?), utf-8 was revised down (unusual ;-).

I understood it to be UTF-16's fault, per Ian's statement. That is to
say, the entire Unicode standard was warped around the problem that
some people were going around thinking "a character is 16 bits", even
though that's just as fallacious as "a character is 8 bits".

ChrisA

Back to comp.lang.python | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Re: Micro Python -- a lean and efficient implementation of Python 3 Paul Sokolovsky <pmiscml@gmail.com> - 2014-06-04 00:41 +0300
  Re: Micro Python -- a lean and efficient implementation of Python 3 Rustom Mody <rustompmody@gmail.com> - 2014-06-03 20:37 -0700
    Re: Micro Python -- a lean and efficient implementation of Python 3 Chris Angelico <rosuav@gmail.com> - 2014-06-04 13:52 +1000
      Re: Micro Python -- a lean and efficient implementation of Python 3 Rustom Mody <rustompmody@gmail.com> - 2014-06-03 21:40 -0700
        Re: Micro Python -- a lean and efficient implementation of Python 3 Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-03 23:02 -0600
        Re: Micro Python -- a lean and efficient implementation of Python 3 Chris Angelico <rosuav@gmail.com> - 2014-06-04 17:16 +1000
          Re: Micro Python -- a lean and efficient implementation of Python 3 Steven D'Aprano <steve@pearwood.info> - 2014-06-04 07:42 +0000
            Re: Micro Python -- a lean and efficient implementation of Python 3 Paul Rubin <no.email@nospam.invalid> - 2014-06-04 00:58 -0700
              Re: Micro Python -- a lean and efficient implementation of Python 3 Robin Becker <robin@reportlab.com> - 2014-06-04 11:06 +0100
              Re: Micro Python -- a lean and efficient implementation of Python 3 Tim Chase <python.list@tim.thechases.com> - 2014-06-04 06:01 -0500
                Re: Micro Python -- a lean and efficient implementation of Python 3 Marko Rauhamaa <marko@pacujo.net> - 2014-06-04 14:57 +0300
                Re: Micro Python -- a lean and efficient implementation of Python 3 Tim Chase <python.list@tim.thechases.com> - 2014-06-04 07:25 -0500
                Re: Micro Python -- a lean and efficient implementation of Python 3 Paul Rubin <no.email@nospam.invalid> - 2014-06-04 11:25 -0700
              Re: Micro Python -- a lean and efficient implementation of Python 3 Robin Becker <robin@reportlab.com> - 2014-06-04 12:53 +0100
                Re: Micro Python -- a lean and efficient implementation of Python 3 Marko Rauhamaa <marko@pacujo.net> - 2014-06-04 15:17 +0300
                Re: Micro Python -- a lean and efficient implementation of Python 3 Robin Becker <robin@reportlab.com> - 2014-06-04 13:31 +0100
                Re: Micro Python -- a lean and efficient implementation of Python 3 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-04 13:51 +0000
                Re: Micro Python -- a lean and efficient implementation of Python 3 wxjmfauth@gmail.com - 2014-06-10 00:32 -0700
                Re: Micro Python -- a lean and efficient implementation of Python 3 wxjmfauth@gmail.com - 2014-06-10 02:13 -0700
              Re: Micro Python -- a lean and efficient implementation of Python 3 Tim Chase <python.list@tim.thechases.com> - 2014-06-04 07:21 -0500
              Re: Micro Python -- a lean and efficient implementation of Python 3 Travis Griggs <travisgriggs@gmail.com> - 2014-06-06 09:59 -0700
                Re: Micro Python -- a lean and efficient implementation of Python 3 Roy Smith <roy@panix.com> - 2014-06-06 13:29 -0400
              Re: Micro Python -- a lean and efficient implementation of Python 3 Tim Chase <python.list@tim.thechases.com> - 2014-06-06 21:20 -0500
                Re: Micro Python -- a lean and efficient implementation of Python 3 wxjmfauth@gmail.com - 2014-06-10 12:27 -0700
        Re: Micro Python -- a lean and efficient implementation of Python 3 Chris Angelico <rosuav@gmail.com> - 2014-06-04 17:20 +1000
        Re: Micro Python -- a lean and efficient implementation of Python 3 Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de> - 2014-06-04 10:00 +0200
      Re: Micro Python -- a lean and efficient implementation of Python 3 Roy Smith <roy@panix.com> - 2014-06-04 14:42 -0400
        Re: Micro Python -- a lean and efficient implementation of Python 3 Rustom Mody <rustompmody@gmail.com> - 2014-06-04 19:06 -0700
          Re: Micro Python -- a lean and efficient implementation of Python 3 Roy Smith <roy@panix.com> - 2014-06-05 09:59 -0400
            Re: Micro Python -- a lean and efficient implementation of Python 3 Chris Angelico <rosuav@gmail.com> - 2014-06-06 01:33 +1000
    Re: Micro Python -- a lean and efficient implementation of Python 3 Steven D'Aprano <steve@pearwood.info> - 2014-06-04 05:20 +0000
      Re: Micro Python -- a lean and efficient implementation of Python 3 Rustom Mody <rustompmody@gmail.com> - 2014-06-03 22:36 -0700
      Re: Micro Python -- a lean and efficient implementation of Python 3 Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-03 23:55 -0600
      Re: Micro Python -- a lean and efficient implementation of Python 3 Terry Reedy <tjreedy@udel.edu> - 2014-06-04 03:00 -0400
      Re: Micro Python -- a lean and efficient implementation of Python 3 Chris Angelico <rosuav@gmail.com> - 2014-06-04 17:10 +1000

csiph-web