old_contents: import django
  from django.conf.urls import include, url
  from django.contrib import admin
  
  
  if django.VERSION < (1, 9):
      admin_urls = include(admin.site.urls)
  else:
      admin_urls = admin.site.urls
  
  urlpatterns = [
      url(r'^admin/', admin_urls),
  ]
  
new_contents: from django.urls import path
  from django.contrib import admin
  
  
  urlpatterns = [
      path("admin/", admin.site.urls),
  ]
  
subject: Remove old django related codes.