old_contents: from django.conf import settings
  from django.conf.urls import include, url
  # from django.contrib import admin
  from django.conf.urls.static import static
  
  
  from . import views
  
  
  urlpatterns = [
      ### API ###
      url(r'^$', views.root),
      url(r'^nodes/', include('api.nodes.urls', namespace='nodes')),
      url(r'^users/', include('api.users.urls', namespace='users')),
      url(r'^docs/', include('rest_framework_swagger.urls')),
  ] + static('/static/', document_root=settings.STATIC_ROOT)
new_contents: from django.conf import settings
  from django.conf.urls import include, url, patterns
  # from django.contrib import admin
  from django.conf.urls.static import static
  
  
  from . import views
  
  
  urlpatterns = [
      ### API ###
      url(r'^v2/', include(patterns('',
          url(r'^$', views.root),
          url(r'^nodes/', include('api.nodes.urls', namespace='nodes')),
          url(r'^users/', include('api.users.urls', namespace='users')),
          url(r'^docs/', include('rest_framework_swagger.urls')),
      )))] + static('/static/', document_root=settings.STATIC_ROOT)
subject: Change API url prefix to 'v2'