old_contents: from django.conf.urls import patterns, url
  
  from font3d import views
  
  urlpatterns = patterns('',
      url(r'^$', views.index, name='index'),
  )
  
new_contents: from django.conf.urls import patterns, url
  from font3d import views
  
  urlpatterns = patterns('',
      url(r'^$', views.index, name='index'),
  )
  
subject: Change url file