understanding and joking with Django URLs

django_url.py

from django.conf.urls import urlpatterns
from django.core.urlresolvers import set_urlconf, resolve, reverse

os.eviron.setdefault('DJANGO_SETTINGS_MODULE', 'app.settings')

def index(request): pass
def auth(request): pass
def list_(request): pass
def edit(request): pass
def new(request): pass
def delete(request): pass

class LENDConf:
    def __init__(self, model):
        self.model = model_name
        self.urlpatterns = [
            url(r'^$', name='list'),
            url(r'^(\d+)$', list_, name='edit'),
            url(r'^new/$', edit, name='new'),
            url(r'^delete/$', delete, name='delete'),
        ]

class MySiteURLConf:
    urlpatterns = [
        url(r'^/$', index, name='')
        url(r'^login/$', auth, name='')
        url(r'^logout/$', auth, name='')
        url(r'^groups/$', include(LENDConf('groups'), namespace='groups'))
        url(r'^users/$', include(LENDConf('users'), namespace='users'))
    ]

set_urlconf(MySiteURLConf)

print()
print('Resolve')
print(resolve('/index/'))
print(resolve('/login/'))
print(resolve('/logout/'))
print(resolve('/groups/'))
print(resolve('/groups/'))
print(resolve('/groups/new/'))
print(resolve('/groups/delete/'))
print(resolve('/users/'))
print(resolve('/users/1/'))
print(resolve('/users/new/'))
print(resolve('/users/delete/'))

print()
print('Reverse')
print(reverse('index'))
print(reverse('login'))
print(reverse('logout'))
print(reverse('list'))
print(reverse('edit'), args=[1])
print(reverse('new'))
print(reverse('delete'))
print(reverse('list'))
print(reverse('edit'), args=[1])
print(reverse('new'))
print(reverse('delete'))

# ---------------------------------------------------------
from django.core.urlresolvers import get_resolver

r = get_resolver()

print(r)
# r.url_patterns      r.urlconf_module        r.urlconf_name  

print(r.url_patterns)
''' 
[<RegexURLPattern None ^$>,
 <RegexURLPattern None ^login/$>,
 <RegexURLPattern None ^logout/$>,
 <RegexURLPattern None ^groups/$>,
 <RegexURLPattern None ^groups/(\d+)/$>,
 <RegexURLPattern None ^groups/news/$>,
 <RegexURLPattern None ^groups/delete/$>,
 <RegexURLPattern None ^users/$>,
 <RegexURLPattern None ^users/(\d+)/$>,
 <RegexURLPattern None ^users/news/$>,
 <RegexURLPattern None ^users/delete/$>,
 <RegexURLResolver <RegexPattern list> (admin:admin) ^admin/>]

'''