Django-DRF | ViewSet

from rest_framework import viewsets

class BookViewSet(viewsets.ViewSet):
        def list(self, request):
            ...
        def retrieve(self, request, pk=None):

urlpatterns = [
    url(r'^books/$', BookViewSet.as_view({'get':'list'}),
    url(r'^books/(?P<pk>\d+)/$', BookViewSet.as_view({'get': 'retrieve'}),
]

def get_serializer_class(self):
     if self.action == 'create':
         return BookCreateSerializer
     else:
         return BookListSerializer