title: How to include DRF 3.8 router url patterns in Django 2.1
body: <pre><code>from app_listing import views
  from django.urls import path, include
  from rest_framework import routers
  
  router = routers.DefaultRouter()
  router.register(r'category', views.CategoryViewSet)
  
  urlpatterns = [
      path('api/', include('router.urls'))
  ]
  
  urlpatterns += router.urls
  </code></pre>
  
  <p>Here is the error while trying to include router.urls <strong>,ModuleNotFoundError: No module named 'router'.</strong></p>
  
  <p>I am using Django2.1,DRF 3.8.2 and python 3.6. Tried a lot, but couldn't find a proper solution for this. Is this still an open issue ? Please help!.</p>