text: from django.urls import path, include
  from django.views.generic import RedirectView
  
  from . import views
  
  app_name = 'demo_app'
  
  urlpatterns = [
      path('', RedirectView.as_view(
          pattern_name='demo_app:bootstrap3.custom-form', permanent=False)),
  
      path('bootstrap3/custom-form.html',
           views.Bootstrap3_CustomFormView.as_view(), name='bootstrap3.custom-form'),
      path('bootstrap3/model-form-<int:pk>.html',
           views.Bootstrap3_UpdateView.as_view(), name='bootstrap3.model-form-1'),
  
      path('bootstrap4/custom-form.html',
           views.Bootstrap4_CustomFormView.as_view(), name='bootstrap4.custom-form'),
      path('bootstrap4/model-form-<int:pk>.html',
           views.Bootstrap4_UpdateView.as_view(), name='bootstrap4.model-form-1'),
  ]
  