Now, we have to create a new Python file named urls.py in the toys folder, specifically, the toys/urls.py file. The following lines show the code for this file, which defines the URL patterns that specify the regular expressions that have to be matched in the request to run a specific function previously defined in the views.py file. The code file for the sample is included in the hillar_django_restful_03_01 folder, in the restful01/toys/urls.py file:

from django.conf.urls import url 
from toys import views 
 
urlpatterns = [ 
    url(r'^toys/$', views.toy_list), 
    url(r'^toys/(?P<pk>[0-9]+)$', views.toy_detail), 
] 

The urlpatterns list makes it possible to route URLs to views. The code calls the django.conf.urls.url function with the regular expression that has to be matched and the view function defined in the views module as arguments to create a RegexURLPattern instance for each entry in the urlpatterns list.

Now, we have to replace the code in the urls.py file in the restful01 folder, specifically, the restful01/urls.py file. The file defines the root URL configurations, and therefore we must include the URL patterns declared in the previously coded toys/urls.py file. The following lines show the new code for the restful01/urls.py file. The code file for the sample is included in the hillar_django_restful_03_01 folder, in the restful01/urls.py file:

from django.conf.urls import url, include 
 
urlpatterns = [ 
    url(r'^', include('toys.urls')), 
]