projectdir/settings/production.py
---------------------------------
from common import *    # most settings are in settings/common.py
ROOT_URLCONF = 'urlconfs.production'


projectdir/urlconfs/production.py
---------------------------------
from common import *    # all urls for prod are in urlconfs/common.py


projectdir/urlconfs/common.py
-----------------------------
from django.conf.urls.defaults import patterns, include, url
from django.contrib import admin

admin.autodiscover()

urlpatterns = patterns('',

    url(r'^admin/', include(admin.site.urls)),
    url(r'^grappelli/', include('grappelli.urls')),

    url(r'^$', 'apps.songs.views.home', name='home'),
    url(r'^songs/', 'apps.songs.views.songs', name='songs'),

)