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Re: Py 3.3, unicode / upper()

References <2adb4a25-8ea3-441f-b8c0-ee6c87e4b19f@googlegroups.com> <mailman.1051.1355928746.29569.python-list@python.org> <890ee58d-e93e-42ac-b17e-59b05c6ecacb@googlegroups.com> <CALwzidm76LsfpmqG7VuknUkY=5CEuK8sEVwAMwk51b9AJXb1kQ@mail.gmail.com>
Date 2012-12-20 13:01 +1100
Subject Re: Py 3.3, unicode / upper()
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.1083.1355968896.29569.python-list@python.org> (permalink)

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On Thu, Dec 20, 2012 at 8:23 AM, Ian Kelly <ian.g.kelly@gmail.com> wrote:
> On Wed, Dec 19, 2012 at 1:55 PM,  <wxjmfauth@gmail.com> wrote:
>> Yes, it is correct (or can be considered as correct).
>> I do not wish to discuss the typographical problematic
>> of "Das Grosse Eszett". The web is full of pages on the
>> subject. However, I never succeeded to find an "official
>> position" from Unicode. The best information I found seem
>> to indicate (to converge), U+1E9E is now the "supported"
>> uppercase form of U+00DF. (see DIN).
>
> Is this link not official?
>
> http://unicode.org/cldr/utility/character.jsp?a=00DF
>
> That defines a full uppercase mapping to SS and a simple uppercase
> mapping to U+00DF itself, not U+1E9E.  My understanding of the simple
> mapping is that it is not allowed to map to multiple characters,
> whereas the full mapping is so allowed.

Ahh, thanks, that explains why the other Unicode-aware language I
tried behaved differently.

Pike v7.9 release 5 running Hilfe v3.5 (Incremental Pike Frontend)
> string s="Stra\u00dfe";
> upper_case(s);
(1) Result: "STRA\337E"
> lower_case(upper_case(s));
(2) Result: "stra\337e"
> String.capitalize(lower_case(s));
(3) Result: "Stra\337e"

The output is the equivalent of repr(), and it uses octal escapes
where possible (for brevity), so \337 is its representation of U+00DF
(decimal 223, octal 337). Upper-casing and lower-casing this character
result in the same thing.

> write("Original: %s\nLower: %s\nUpper: %s\n",s,lower_case(s),upper_case(s));
Original: Straße
Lower: straße
Upper: STRAßE

It's worth noting, incidentally, that the unusual upper-case form of
the letter (U+1E9E) does lower-case to U+00DF in both Python 3.3 and
Pike 7.9.5:

> lower_case("Stra\u1E9Ee");
(9) Result: "stra\337e"

>>> ord("\u1e9e".lower())
223

So both of them are behaving in a compliant manner, even though
they're not quite identical.

ChrisA

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Thread

Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-19 06:23 -0800
  Re: Py 3.3, unicode / upper() Thomas Bach <thbach@students.uni-mainz.de> - 2012-12-19 15:43 +0100
  Re: Py 3.3, unicode / upper() Christian Heimes <christian@python.org> - 2012-12-19 15:52 +0100
    Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-19 12:55 -0800
      Re: Py 3.3, unicode / upper() Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-19 14:23 -0700
        Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-20 11:42 -0800
        Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-20 11:42 -0800
      Re: Py 3.3, unicode / upper() Chris Angelico <rosuav@gmail.com> - 2012-12-20 13:01 +1100
      Re: Py 3.3, unicode / upper() Westley Martínez <anikom15@gmail.com> - 2012-12-19 18:53 -0800
    Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-19 12:55 -0800
  Re: Py 3.3, unicode / upper() Stefan Krah <stefan-usenet@bytereef.org> - 2012-12-19 16:01 +0100
  Re: Py 3.3, unicode / upper() Chris Angelico <rosuav@gmail.com> - 2012-12-20 02:17 +1100
  Re: Py 3.3, unicode / upper() Johannes Bauer <dfnsonfsduifb@gmx.de> - 2012-12-19 16:18 +0100
    Re: Py 3.3, unicode / upper() Johannes Bauer <dfnsonfsduifb@gmx.de> - 2012-12-19 16:22 +0100
    Re: Py 3.3, unicode / upper() Chris Angelico <rosuav@gmail.com> - 2012-12-20 02:40 +1100
      Re: Py 3.3, unicode / upper() Johannes Bauer <dfnsonfsduifb@gmx.de> - 2012-12-20 15:57 +0100
    Re: Py 3.3, unicode / upper() Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-19 11:27 -0700
      Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-19 13:18 -0800
        Re: Py 3.3, unicode / upper() Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-19 14:31 -0700
          Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-20 11:40 -0800
            Re: Py 3.3, unicode / upper() Terry Reedy <tjreedy@udel.edu> - 2012-12-20 17:48 -0500
            Re: Py 3.3, unicode / upper() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-12-20 22:51 +0000
          Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-20 11:40 -0800
      Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-19 13:18 -0800
    Re: Py 3.3, unicode / upper() Terry Reedy <tjreedy@udel.edu> - 2012-12-19 19:39 -0500
    Re: Py 3.3, unicode / upper() Chris Angelico <rosuav@gmail.com> - 2012-12-20 13:03 +1100
    Re: Py 3.3, unicode / upper() Terry Reedy <tjreedy@udel.edu> - 2012-12-19 21:54 -0500
    Re: Py 3.3, unicode / upper() Westley Martínez <anikom15@gmail.com> - 2012-12-19 19:12 -0800
    Re: Py 3.3, unicode / upper() Chris Angelico <rosuav@gmail.com> - 2012-12-20 14:22 +1100
    Re: Py 3.3, unicode / upper() Terry Reedy <tjreedy@udel.edu> - 2012-12-20 00:32 -0500
      Re: Py 3.3, unicode / upper() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-12-20 05:51 +0000
      Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-20 11:57 -0800
        Re: Py 3.3, unicode / upper() Terry Reedy <tjreedy@udel.edu> - 2012-12-20 17:30 -0500
      Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-20 11:57 -0800
    Re: Py 3.3, unicode / upper() Serhiy Storchaka <storchaka@gmail.com> - 2012-12-27 21:00 +0200
      Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-27 11:36 -0800
      Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-27 11:36 -0800
  Re: Py 3.3, unicode / upper() Christian Heimes <christian@python.org> - 2012-12-19 16:33 +0100
    Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-29 11:16 -0800
    Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-29 11:16 -0800
  Re: Py 3.3, unicode / upper() Benjamin Peterson <benjamin@python.org> - 2012-12-19 20:25 +0000
  Re: Py 3.3, unicode / upper() wxjmfauth@gmail.com - 2012-12-20 11:19 -0800
    Re: Py 3.3, unicode / upper() MRAB <python@mrabarnett.plus.com> - 2012-12-20 20:20 +0000
    Re: Py 3.3, unicode / upper() Chris Angelico <rosuav@gmail.com> - 2012-12-21 08:19 +1100
    Re: Py 3.3, unicode / upper() Terry Reedy <tjreedy@udel.edu> - 2012-12-20 17:12 -0500
    Re: Py 3.3, unicode / upper() Terry Reedy <tjreedy@udel.edu> - 2012-12-20 17:59 -0500
    Re: Py 3.3, unicode / upper() Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-20 17:34 -0700

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