app_name The application namespace for the URL pattern that matches the URL.
namespace The instance namespace for the URL pattern that matches the URL.
namespaces The list of individual namespace components in the full instance namespace for the URL pattern that matches the URL
reverse_lazy(viewname, urlconf=None, args=None, kwargs=None, current_app=None) It is useful for when you need to use a URL reversal
Page 2 of 2