You are missing quotes.

urlpatterns += patterns('',
    url(r'^options/, include(options.urls')),
)

Should be

urlpatterns += patterns('',
    url(r'^options/', include('options.urls')),
)

I'm not too sure of your expression, might try this:

urlpatterns = patterns('options.views', 
    url(r'^items/(?<=-)(P<id>\d+)/$', 'details'),
    ...
)

You are missing quotes.

urlpatterns += patterns('',
    url(r'^options/, include(options.urls')),
)

Should be

urlpatterns += patterns('',
    url(r'^options/', include('options.urls')),
)

I'm not too sure of your expression, might try this:

urlpatterns = patterns('options.views', 
    url(r'^items/(?<=-)(?P<id>\d+)/$', 'details'),
    ...
)