New to Django cannot figure URLpatterns

I am new to using Django and I can get one urls to work, but I cannot get another. I am running Django 1.5 This url works. url(r'^$', views.index, name='index'), But if I try to follow this one. url(r'^(?P\D+)/$', views.detail, name='detail'), I get the following error.when I try http://1

New to Django and developing website based on a Framework. What is the best order to develop website?

I am starting to develop a website using django and I am wondering if I should add all the extra modules (authorization, mutliLanguages, comments), at the beginning, or should I develop the basic pages (apps) and then go back and add in the requirements for the modules I want to add. I am tryi