old_contents: from django.conf.urls import url
  from django.views.generic import ArchiveIndexView
  from django.views.generic import ListView
  
  from .models import Entry, Tag
  from .views import EntryDayArchiveView
  from .views import EntryDetailView
  from .views import EntryMonthArchiveView
  from .views import EntryYearArchiveView
  from .views import TaggedEntryListView
  
  # URL examples
  # ------------
  # /blog/tags/                   -- tag list detail
  # /blog/tags/foo/               -- entries tagged with "foo"
  # /blog/a-sample-entry/         -- entry detail
  # /blog/2013/01/05/             -- entry list (by year, month, day)
  # /blog/2013/01/                -- entry list (by year, month)
  # /blog/2013/                   -- entry list (by year)
  # /blog/2013/05/a-sample-entry/ -- entry detail (with date slug)
  # /blog/                        -- entry detail (latest published post)
  
  urlpatterns = [
      url(r'^tags/$', ListView.as_view(model=Tag), name='list_tags'),
      url(
          r'^tags/(?P<tag_slug>.*)/$',
          TaggedEntryListView.as_view(),
          name='tagged_entry_list'
      ),
  
      # Year, Month, Day Archives
      url(
          r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})/$',
          EntryDayArchiveView.as_view(),
          name='entry_archive_day'
      ),
      url(
          r'^(?P<year>\d{4})/(?P<month>\d{2})/$',
          EntryMonthArchiveView.as_view(),
          name='entry_archive_month'
      ),
      url(
          r'^(?P<year>\d{4})/$',
          EntryYearArchiveView.as_view(),
          name='entry_archive_year'
      ),
  
      # Detail views (with and without the date)
      url(
          r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})/(?P<slug>.*)/$',
          EntryDetailView.as_view(),
          name='entry_detail'
      ),
      url(
          r'^(?P<slug>.*)/$',
          EntryDetailView.as_view(),
          name='entry_detail'
      ),
      url(
          r'^$',
          ArchiveIndexView.as_view(
              model=Entry,
              date_field='published_on',
              paginate_by=10
          ),
          name='list_entries'
      ),
  ]
  
new_contents: from django.conf.urls import url
  from django.views.generic import ArchiveIndexView
  from django.views.generic import ListView
  
  from .models import Entry, Tag
  from .views import EntryDayArchiveView
  from .views import EntryDetailView
  from .views import EntryMonthArchiveView
  from .views import EntryYearArchiveView
  from .views import TaggedEntryListView
  
  # URL examples
  # ------------
  # /blog/tags/                   -- tag list detail
  # /blog/tags/foo/               -- entries tagged with "foo"
  # /blog/a-sample-entry/         -- entry detail
  # /blog/2013/01/05/             -- entry list (by year, month, day)
  # /blog/2013/01/                -- entry list (by year, month)
  # /blog/2013/                   -- entry list (by year)
  # /blog/2013/05/a-sample-entry/ -- entry detail (with date slug)
  # /blog/                        -- entry detail (latest published post)
  
  app_name = 'blargg'
  urlpatterns = [
      url(r'^tags/$', ListView.as_view(model=Tag), name='list_tags'),
      url(
          r'^tags/(?P<tag_slug>.*)/$',
          TaggedEntryListView.as_view(),
          name='tagged_entry_list'
      ),
  
      # Year, Month, Day Archives
      url(
          r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})/$',
          EntryDayArchiveView.as_view(),
          name='entry_archive_day'
      ),
      url(
          r'^(?P<year>\d{4})/(?P<month>\d{2})/$',
          EntryMonthArchiveView.as_view(),
          name='entry_archive_month'
      ),
      url(
          r'^(?P<year>\d{4})/$',
          EntryYearArchiveView.as_view(),
          name='entry_archive_year'
      ),
  
      # Detail views (with and without the date)
      url(
          r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})/(?P<slug>.*)/$',
          EntryDetailView.as_view(),
          name='entry_detail'
      ),
      url(
          r'^(?P<slug>.*)/$',
          EntryDetailView.as_view(),
          name='entry_detail'
      ),
      url(
          r'^$',
          ArchiveIndexView.as_view(
              model=Entry,
              date_field='published_on',
              paginate_by=10
          ),
          name='list_entries'
      ),
  ]
  
subject: add app_name for urls