Some information about locale (was Re: [Python-Dev] repr vs. str and locales again)
Fredrik Lundh" <firstname.lastname@example.org
Mon, 22 May 2000 09:20:50 +0200
Peter Funk wrote:
> AFAIK locale and friends conform to POSIX.1. Calling this obsolescent...
> hmmm... may offend a *LOT* of people. Try this on comp.os.linux.advocacy ;-)
you're missing the point -- now that we've added unicode support to
Python, the old 8-bit locale *ctype* stuff no longer works. while some
platforms implement a wctype interface, it's not widely available, and it's
not always unicode.
so in order to provide platform-independent unicode support, Python 1.6
comes with unicode-aware and fully portable replacements for the ctype
the code is already in there...
> On POSIX systems there are a several environment variables used to
> control the default locale settings for a users session. For example
> on my SuSE Linux system currently running in the german locale the
> environment variable LC_CTYPE=de_DE is automatically set by a file
> /etc/profile during login, which causes automatically the C-library
> function toupper('ä') to return an 'Ä' ---you should see
> a lower case a-umlaut as argument and an upper case umlaut as return
> value--- without having all applications to call 'setlocale' explicitly.
> So this simply works well as intended without having to add calls
> to 'setlocale' to all application program using this C-library functions.
note that this leaves us with four string flavours in 1.6:
- 8-bit binary arrays. may contain binary goop, or text in some strange
encoding. upper, strip, etc should not be used.
- 8-bit text strings using the system encoding. upper, strip, etc works
as long as the locale is properly configured.
- 8-bit unicode text strings. upper, strip, etc may work, as long as the
system encoding is a subset of unicode -- which means US ASCII or
ISO Latin 1.
- wide unicode text strings. upper, strip, etc always works.
is this complexity really worth it?