new_contents: from django.conf.urls import patterns, url
  from apps.blog import views
  
  
  urlpatterns = patterns(
      '',
      url(r'^$', views.home, name='home'),
      url(r'^posts/$', views.post_list, name="post_list"),
      url(r'^post/(?P<id>\d+)/$', views.post_detail, name="post_detail"),
      url(r'^edit-post/$', views.post_form, name="post_form"),
      url(r'^edit-post/(?P<id>\d*)/$', views.post_form, name="post_form"),
  )
  
subject: implement routing