[Tutor] empty delimiters, and None

[eryksun]

On Fri, Nov 29, 2013 at 8:19 AM,  <ugajin at talktalk.net> wrote:
>
> On trying to run the script (before the fix) I had the following traceback
> message:
> File "measure.py", line 35, in <module>
> locale.setlocale(locale.LC_ALL, '')
> File
> "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/locale.py",
> line 494, in setlocale
> return _setlocale(category, locale)
> locale.Error: unsupported locale setting
>
> If I booted from the Unix file I received the following feedback:
> Setting Language: .UTF-8
> (process:82224): Gtk-WARNING **: Locale not supported by C library.
Using
> the fallback 'C' locale.

It looks like you have a misconfigured environment. ".UTF-8" is
missing the language, such as "en_GB.UTF-8".

locale.setlocale calls the C runtime setlocale. Passing an empty
string as the 2nd argument instructs setlocale to use the environment
variables LC_ALL, LC_COLLATE, LC_CTYPE, LC_MESSAGES, LC_MONETARY,
LC_NUMERIC, LC_TIME, and LANG. It uses the first one it finds. The
search order might vary depending on the implementation. Just check
them all: os.environ["LANG"], etc.

If you pass None (translated to NULL in the C call) as the 2nd
argument, then it only queries the current locale. This avoids the
immediate problem without really fixing it. The process will use the
default "C" locale.