在使用url的时候，有些地方是这样写的：

 url(r‘^blog/‘, include(‘blog.urls‘, namespace=‘blog‘,app_name=‘blog‘))

　　但是会报错：

Specifying a namespace in include() without providing an app_name ‘  django.core.exceptions.ImproperlyConfigured: Specifying a namespace in include() without providing an app_name is not supported. Set the app_name attribute in the included module, or pass a 2-tuple containing the list of patterns and app_name instead

只需要换种写法即可：

 url(r‘^blog/‘, include((‘blog.urls‘, ‘blog‘), namespace=‘blog‘))

使用url的时候添加app_name，提示错误：Specifying a namespace in include() without providing an app_name ' django.core.exceptions.ImproperlyConfigured: Specifying a ...