As things stand, we can use the command line to start our development server (Example 5.11) and see the fruits of our labor.
$ ./manage.py runserver
If you navigate to the address of a valid
Tag, you will be greeted by a simple HTML page built from our template. For example,
http://127.0.0.1:8000/tag/django/ will display a simple page about our Django tag. However, what happens if you browse to a URL built with an invalid tag slug, such as
You’ll be greeted by a page of Django debug information, as shown in Figure 5.4.