old_contents: from django.conf import settings
  from django.conf.urls import url, include
  from django.conf.urls.static import static
  from django.contrib import admin
  from djs_playground.views import index
  
  urlpatterns = [
      url(r'^$', index, name='index'),
      url(r'^admin/', admin.site.urls),
      url(r'^summernote/', include('django_summernote.urls')),
  ] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
  
new_contents: from django.conf import settings
  from django.urls import re_path, include
  from django.conf.urls.static import static
  from django.contrib import admin
  from djs_playground.views import index
  
  urlpatterns = [
      re_path(r'^$', index, name='index'),
      re_path(r'^admin/', admin.site.urls),
      re_path(r'^summernote/', include('django_summernote.urls')),
  ] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
  
subject: Change url in favor of the re_path