  
      @property
      def urls(self):
          if not hasattr(self, '_urls'):
              self._urls = patterns('', *self.get_urls())
          return self._urls
  
  
  class SimpleRouter(BaseRouter):
      routes = [
 
</s> remove urlpatterns = patterns(
    '',
 </s> add urlpatterns = [ </s> remove urlpatterns = patterns(
    '',
 </s> add urlpatterns = [ </s> remove     urlpatterns = patterns(
        '',
 </s> add     urlpatterns = [ </s> remove urlpatterns = patterns(
    '',
 </s> add urlpatterns = [ </s> remove urlpatterns = patterns(
    '',
 </s> add urlpatterns = [
            self._urls = self.get_urls()
  
      @property
      def urls(self):
          if not hasattr(self, '_urls'):
            self._urls = self.get_urls()
          return self._urls
  
  
  class SimpleRouter(BaseRouter):
      routes = [
keep keep keep keep replace keep keep keep keep keep
 Remove `django.conf.urls.pattern` as it'll be removed in Django 2.0 
rest_framework/routers.py