'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.
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python3 Django 环境下，如果你遇到在根目录下urls.py中的include方法的第二个参数namespace添加之后就出错的问题。请在[app_name]目录下的urls.py中的urlpatterns前面加上app_name='[app_name]'， [app_name]代表你的应用的名称。
例如：app_name ='[blog]'
 

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