old_contents: from django.conf.urls import patterns, url
  
  
  urlpatterns = patterns(
      'tagging_autocomplete.views',
      url(r'^list$', 'list_tags', name='tagging_autocomplete-list'),
  )
  
new_contents: from django.conf.urls import url
  
  
  urlpatterns = [
      'tagging_autocomplete.views',
      url(r'^list$', 'list_tags', name='tagging_autocomplete-list'),
  ]
  
subject: Drop the deprecated way of specifying url patterns