old_contents: from django.conf.urls import patterns, include, url
  
  from django.contrib.auth.models import User
  from rest_framework import routers, serializers, viewsets
  
  from django.contrib import admin
  admin.autodiscover()
  
  # Serializers define the API representation.
  class UserSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
          model = User
          fields = ('url', 'username', 'email', 'is_staff')
  
  # ViewSets define the view behavior.
  class UserViewSet(viewsets.ModelViewSet):
      queryset = User.objects.all()
      serializer_class = UserSerializer
  
  # Routers provide an easy way of automatically determining the URL conf.
  router = routers.DefaultRouter()
  router.register(r'users', UserViewSet)
  
  urlpatterns = patterns('',
      # Examples:
      # url(r'^$', 'cocoa.views.home', name='home'),
      # url(r'^blog/', include('blog.urls')),
      url(r'^alipay/',include('alipay.urls', namespace='alipay')),
      url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework')),
      url(r'^admin/', include(admin.site.urls)),
      url(r'^', include(router.urls)),
  )
  
new_contents: from django.conf.urls import patterns, include, url
  
  from django.contrib.auth.models import User
  from rest_framework import routers, serializers, viewsets
  
  from django.contrib import admin
  admin.autodiscover()
  
  # Serializers define the API representation.
  class UserSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
          model = User
          fields = ('url', 'username', 'email', 'is_staff')
  
  # ViewSets define the view behavior.
  class UserViewSet(viewsets.ModelViewSet):
      queryset = User.objects.all()
      serializer_class = UserSerializer
  
  # Routers provide an easy way of automatically determining the URL conf.
  router = routers.DefaultRouter()
  router.register(r'users', UserViewSet)
  
  urlpatterns = patterns('',
      # Examples:
      # url(r'^$', 'cocoa.views.home', name='home'),
      # url(r'^blog/', include('blog.urls')),
      url(r'^alipay/',include('alipay.urls', namespace='alipay')),
      url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework')),
      url(r'^api/', include(router.urls)),
      url(r'^admin/', include(admin.site.urls)),
  )
  
subject: enable rest api in urls.py