URLs & Routing

Each app defines its own urls.py mapping a path pattern to a view. The project's root urls.py then include()s each app's URLs under a prefix.

Example: one app's URLs, included into the project

# blog/urls.py
from django.urls import path
from . import views

app_name = 'blog'
urlpatterns = [
    path('', views.post_list, name='post_list'),
]

# myproject/urls.py
from django.urls import include, path
urlpatterns = [
    path('blog/', include('blog.urls')),
]

Requests to /blog/ are routed to the post_list view.

This is exactly how this actual platform's own URLs are structured — each app owns its own urls.py (tutorials, courses, marketplace, each independently), and the root urls.py mounts every one of them under its own prefix. app_name matters for a real practical reason: it lets templates reference {% url 'blog:post_list' %} unambiguously, even if a different app also happens to have a view named post_list.