Python django.core.urlresolvers 模块，LocaleRegexURLResolver() 实例源码

def i18n_patterns(prefix, *args):
    """
    Adds the language code prefix to every URL pattern within this
    function. This may only be used in the root URLconf, not in an included
    URLconf.
    """
    if isinstance(prefix, six.string_types):
        warnings.warn(
            "Calling i18n_patterns() with the `prefix` argument and with tuples "
            "instead of django.conf.urls.url() instances is deprecated and "
            "will no longer work in Django 1.10. Use a list of "
            "django.conf.urls.url() instances instead.",
            RemovedInDjango110Warning, stacklevel=2
        )
        pattern_list = patterns(prefix, *args)
    else:
        pattern_list = [prefix] + list(args)
    if not settings.USE_I18N:
        return pattern_list
    return [LocaleRegexURLResolver(pattern_list)]

def i18n_patterns(prefix, *args):
    """
    Adds the language code prefix to every URL pattern within this
    function. This may only be used in the root URLconf, not in an included
    URLconf.
    """
    if isinstance(prefix, six.string_types):
        warnings.warn(
            "Calling i18n_patterns() with the `prefix` argument and with tuples "
            "instead of django.conf.urls.url() instances is deprecated and "
            "will no longer work in Django 1.10. Use a list of "
            "django.conf.urls.url() instances instead.",
            RemovedInDjango110Warning, stacklevel=2
        )
        pattern_list = patterns(prefix, *args)
    else:
        pattern_list = [prefix] + list(args)
    if not settings.USE_I18N:
        return pattern_list
    return [LocaleRegexURLResolver(pattern_list)]

def i18n_patterns(prefix, *args):
    """
    Adds the language code prefix to every URL pattern within this
    function. This may only be used in the root URLconf, not in an included
    URLconf.
    """
    if isinstance(prefix, six.string_types):
        warnings.warn(
            "Calling i18n_patterns() with the `prefix` argument and with tuples "
            "instead of django.conf.urls.url() instances is deprecated and "
            "will no longer work in Django 1.10. Use a list of "
            "django.conf.urls.url() instances instead.",
            RemovedInDjango110Warning, stacklevel=2
        )
        pattern_list = patterns(prefix, *args)
    else:
        pattern_list = [prefix] + list(args)
    if not settings.USE_I18N:
        return pattern_list
    return [LocaleRegexURLResolver(pattern_list)]

def i18n_patterns(prefix, *args):
    """
    Adds the language code prefix to every URL pattern within this
    function. This may only be used in the root URLconf, not in an included
    URLconf.
    """
    if isinstance(prefix, six.string_types):
        warnings.warn(
            "Calling i18n_patterns() with the `prefix` argument and with tuples "
            "instead of django.conf.urls.url() instances is deprecated and "
            "will no longer work in Django 2.0. Use a list of "
            "django.conf.urls.url() instances instead.",
            RemovedInDjango20Warning, stacklevel=2
        )
        pattern_list = patterns(prefix, *args)
    else:
        pattern_list = [prefix] + list(args)
    if not settings.USE_I18N:
        return pattern_list
    return [LocaleRegexURLResolver(pattern_list)]

def is_language_prefix_patterns_used():
    """
    Returns `True` if the `LocaleRegexURLResolver` is used
    at root level of the urlpatterns, else it returns `False`.
    """
    return any(isinstance(url_pattern, LocaleRegexURLResolver)
               for url_pattern in get_resolver(None).url_patterns)