conf.py 文件源码

def get_available_languages_setting():
    '''
    list of available languages for modeltrans translations.
    defaults to the list of language codes extracted from django setting LANGUAGES
    '''
    languages = tuple(set(getattr(
        settings,
        'MODELTRANS_AVAILABLE_LANGUAGES',
        (code for code, _ in getattr(settings, 'LANGUAGES'))
    )))

    if not all(isinstance(x, six.string_types) for x in languages):
        raise ImproperlyConfigured('MODELTRANS_AVAILABLE_LANGUAGES should be an iterable of strings')

    # make sure LANGUAGE_CODE is not in available languages
    return (lang for lang in languages if lang != get_default_language())