old_contents: from django.conf.urls import url
  
  from django_lti_tool_provider import views as lti_views
  
  urlpatterns = [
      url(r'', lti_views.LTIView.as_view(), name='lti')
  ]
  
new_contents: from django.conf.urls import url
  
  from django_lti_tool_provider import views as lti_views
  
  
  app_name = 'django_lti_tool_provider'
  
  urlpatterns = [
      url(r'', lti_views.LTIView.as_view(), name='lti')
  ]
  
subject: Adjust URL configuration based on changes introduced in Django 1.9: