django 中namespace的问题

urlpatterns = [

    url(r'^admin/', admin.site.urls),

    url(r'^polls/', include('polls.urls', namespace="polls")),

]

def include(arg, namespace=None):

    app_name = None

    if isinstance(arg, tuple):

        # Callable returning a namespace hint.

        try:

            urlconf_module, app_name = arg

        except ValueError:

            if namespace:

                raise ImproperlyConfigured(

                    'Cannot override the namespace for a dynamic module that '

                    'provides a namespace.'

                )

            raise ImproperlyConfigured(

                'Passing a %d-tuple to include() is not supported. Pass a '

                '2-tuple containing the list of patterns and app_name, and '

                'provide the namespace argument to include() instead.' % len(arg)

            )

    else:

        # No namespace hint - use manually provided namespace.

        urlconf_module = arg

    if isinstance(urlconf_module, str):

        urlconf_module = import_module(urlconf_module)

    patterns = getattr(urlconf_module, 'urlpatterns', urlconf_module)

    app_name = getattr(urlconf_module, 'app_name', app_name)

    if namespace and not app_name:

        raise ImproperlyConfigured(

            'Specifying a namespace in include() without providing an app_name '

            'is not supported. Set the app_name attribute in the included '

            'module, or pass a 2-tuple containing the list of patterns and '

            'app_name instead.',

        )

    namespace = namespace or app_name

    # Make sure the patterns can be iterated through (without this, some

    # testcases will break).

    if isinstance(patterns, (list, tuple)):

        for url_pattern in patterns:

            pattern = getattr(url_pattern, 'pattern', None)

            if isinstance(pattern, LocalePrefixPattern):

                raise ImproperlyConfigured(

                    'Using i18n_patterns in an included URLconf is not allowed.'

                )

    return (urlconf_module, app_name, namespace)

urlpatterns = [

    path('admin/', admin.site.urls),

    path('',include(('mysite1.urls','mysite1'),namespace='learning_logs')),

    path('users/',include(('users.urls','users'),namespace='users')),

]