old_contents: from django.conf.urls import patterns, include, url
  
  from .harvest import cron
  from tracking.views import index, device, v1_api,print_map
  from tracking.admin import site
  from tracking.geojsonviews import geojson_patterns
  
  urlpatterns = patterns('',
      url(r'^admin/', include(site.urls)),
      url(r'^api/', include(v1_api.urls)),
      url(r'^cron', cron),
      url(r'^$', index),
      url(r'^print$', print_map),
      url(r'^device/(?P<device>\d+)$', device),
      url(r'^', include(geojson_patterns,namespace='geojson')),
  )
  
new_contents: from django.conf.urls import include, url
  
  from .harvest import cron
  from tracking.views import index, device, v1_api, print_map
  from tracking.admin import site
  from tracking.geojsonviews import geojson_patterns
  
  urlpatterns = [
      url(r'^admin/', include(site.urls)),
      url(r'^api/', include(v1_api.urls)),
      url(r'^cron', cron),
      url(r'^$', index),
      url(r'^print$', print_map),
      url(r'^device/(?P<device>\d+)$', device),
      url(r'^', include(geojson_patterns, namespace='geojson')),
  ]
  
subject: Implement new-style urls patterns.