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Re: Py 3.3, unicode / upper()

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Date Wed, 19 Dec 2012 12:55:08 -0800 (PST)
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Le mercredi 19 décembre 2012 15:52:23 UTC+1, Christian Heimes a écrit :
> Am 19.12.2012 15:23, schrieb wxjmfauth@gmail.com:
> 
> > But, this is not the problem.
> 
> > I was suprised to discover this:
> 
> > 
> 
> >>>> 'Straße'.upper()
> 
> > 'STRASSE'
> 
> > 
> 
> > I really, really do not know what I should think about that.
> 
> > (It is a complex subject.) And the real question is why?
> 
> 
> 
> It's correct. LATIN SMALL LETTER SHARP S doesn't have an upper case
> 
> form. However the unicode database specifies an upper case mapping from
> 
> ß to SS. http://codepoints.net/U+00DF
> 
> 
> 
> Christian

-----

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).

What is bothering me, is more the implementation. The Unicode
documentation says roughly this: if something can not be
honoured, there is no harm, but do not implement a workaroud.
In that case, I'm not sure Python is doing the best.

If "wrong", this can be considered as programmatically correct
or logically acceptable (Py3.2)

>>> 'Straße'.upper().lower().capitalize() == 'Straße'
True

while this will *always* be problematic (Py3.3)

>>> 'Straße'.upper().lower().capitalize() == 'Straße'
False

jmf

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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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