sort using locale in windows (>= Vista???)

locale_sort_win.py

import ctypes
from ctypes import windll
kernel32 = windll.LoadLibrary("kernel32")
import functools

def compare(str1, str2, locale="cs-CZ"):
    res = kernel32.CompareStringEx(
        ctypes.c_wchar_p(locale),
        ctypes.c_ulong(0),
        ctypes.c_wchar_p(str1),
        len(str1),
        ctypes.c_wchar_p(str2),
        len(str2),
        None,
        None,
        ctypes.c_long(0)
    )
    return res - 2
    
def key_comparer(locale="cs-CZ"):
    specific_compare = functools.partial(compare, locale=locale)
    return functools.cmp_to_key(specific_compare)

def sort_with_locale(iterable, locale="cs-CZ"):
    return sorted(iterable, key=key_comparer(locale))