old_contents: from django.conf.urls import patterns, include, url
  import views
  from .views import ProjectListView, PracticeListView, UsageListView
  
  urlpatterns = patterns('',
      # Examples:
      url(r'^(?P<slug>[-\w]+)/$', views.ProjectDetailView.as_view(), name='project-detail'),
      url(r'^$', ProjectListView.as_view(), name='project-list'),                       
      url(r'^practice', PracticeListView.as_view(), name='practice-list'),          
      url(r'^usage', UsageListView.as_view(), name='usage-list'),                      
  )
  
new_contents: from django.conf.urls import patterns, include, url
  import views
  from .views import ProjectListView, PracticeListView, UsageListView
  
  urlpatterns = patterns('',
      # Examples:
      url(r'^(?P<slug>[-\w]+)/$', views.ProjectDetailView.as_view(), name='project-detail'),
      url(r'^$', ProjectListView.as_view(), name='project-list'),                       
      url(r'^practice$', PracticeListView.as_view(), name='practice-list'),          
      url(r'^usage$', UsageListView.as_view(), name='usage-list'),                      
  )
  
subject: Add & to url