project 的url和application的url问题

[crazy-canux]

project：
url(r'^blog/', include('blog.urls')),
application：
url(r'^$', views.IndexView.as_view(), name='blog')

project
url(r'', include('blog.urls', namespace='blog', app_name='blog'))
application:
url(r'^blog/$', views.IndexView.as_view(), name='index')

What's the different?

[Deleted user]

see https://docs.djangoproject.com/en/1.10/intro/tutorial03/ https://docs.djangoproject.com/en/1.10/topics/http/urls/