我的頁面建好后是這樣，什麽原因？

Page not found (404)

Using the URLconf defined in django_introduction.urls, Django tried these URL patterns, in this order:

1. admin/

2. blog/ hello_world

The current path, blog/, didn’t match any of these.

You’re seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page