text: from django.conf.urls import url
  from . import views
  
  urlpatterns = [
      url('^products/$', views.ProductListView.as_view(), name='products'),
      url('^cart/$', views.CartDetailView.as_view(), name='cart'),
      url(r'^cart/(?P<id>[0-9]+)/$', views.CartUpdateDeleteView.as_view(), name='update'),
  ]
  