old_contents: from django.conf.urls import url
  from . import views
  
  urlpatterns = [
          url(r'^generate_pdf/(?P<bill_id>\d+)$', views.generate_pdf,
              name='generate-pdf'),
          url(r'^signup/$', views.signup, name='billjobs_signup'),
          url(r'^signup-success/$', views.signup_success,
              name='billjobs_signup_success'),
          url(r'^statistics/$', views.statistics, name = 'statistics')
          ]
  
new_contents: from django.conf.urls import url
  from . import views
  
  urlpatterns = [
          url(r'^generate_pdf/(?P<bill_id>\d+)$', views.generate_pdf,
              name='generate-pdf'),
          url(r'^signup/$', views.signup, name='billjobs_signup'),
          url(r'^signup-success/$', views.signup_success,
              name='billjobs_signup_success'),
          url(r'^statistics/$', views.statistics, name='billjobs_statistics')
          ]
  
subject: prepend route name with billjobs