Python – In setting viewset, I got an error AttributeError: ‘function’ object has no attribute ‘get_extra_actions’

I'm learning DRF and feel confused a little now.
I set up QuestionView and QuestionSerializer like this.

views.py

class QuestionView(viewsets.ModelViewSet) :
    queryset = models.Question.objects.all()
    serializer_class = QuestionSerializer

    def list(self, request, *args, **kwargs):
        serializer = QuestionSerializer(models.Question.objects.all())
        return Response(serializer.data)

serializer.py

class QuestionSerializer(serializers.ModelSerializer):
    class Meta:
        model= Question
        fields= ("question_text", "owner", "pub_date")

urls.py

router = routers.DefaultRouter()
router.register('profile', cebula_views.SettingView)
router.register('question', cebula_views.QuestionView.as_view({
    'get':'list',

}), 'userpage-question')

urlpatterns = [
    ...
    url(r'^', include(router.urls)),
    ...
] 

File "C:\Users\1Sun\Cebula3\businessproject\urls.py", line 34, in

url(r'^', include(router.urls)), File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\routers.py",
line 101, in urls
self._urls = self.get_urls() File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\routers.py",
line 363, in get_urls
urls = super(DefaultRouter, self).get_urls() File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\routers.py",
line 261, in get_urls
routes = self.get_routes(viewset) File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\routers.py",
line 176, in get_routes
extra_actions = viewset.get_extra_actions() AttributeError: 'function' object has no attribute 'get_extra_actions'

In my opinion, It is that I should write get_extra_actions method in QuestionView class, If so, how I write that? like this?

def get_extra_actions() : 
    return  ???

If not, what is the problem?

[Edit]

when I erase .as_view() at the url part and write like router.register('question', cebula_views.QuestionView, 'userpage-question')

the error is

Unhandled exception in thread started by .wrapper at 0x00000283172D3D08> Traceback (most
recent call last): File
"C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\utils\autoreload.py",
line 225, in wrapper
fn(*args, **kwargs) File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\management\commands\runserver.py",
line 120, in inner_run
self.check(display_num_errors=True) File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\management\base.py",
line 364, in check
include_deployment_checks=include_deployment_checks, File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\management\base.py",
line 351, in _run_checks
return checks.run_checks(**kwargs) File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\checks\registry.py",
line 73, in run_checks
new_errors = check(app_configs=app_configs) File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\checks\urls.py",
line 13, in check_url_config
return check_resolver(resolver) File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\checks\urls.py",
line 23, in check_resolver
return check_method() File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\urls\resolvers.py",
line 397, in check
for pattern in self.url_patterns: File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\utils\functional.py",
line 36, in get
res = instance.dict[self.name] = self.func(instance) File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\urls\resolvers.py",
line 536, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) File
"C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\utils\functional.py",
line 36, in get
res = instance.dict[self.name] = self.func(instance) File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\urls\resolvers.py",
line 529, in urlconf_module
return import_module(self.urlconf_name) File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\importlib__init__.py",
line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level) File "", line 994, in _gcd_import File
"", line 971, in _find_and_load File
"", line 955, in _find_and_load_unlocked
File "", line 665, in _load_unlocked
File "", line 678, in
exec_module File "", line 219, in
_call_with_frames_removed File "C:\Users\1Sun\Cebula3\businessproject\urls.py", line 31, in
url(r'^cebula/',include('cebula.urls',namespace='cebula')), File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\django\urls\conf.py",
line 34, in include
urlconf_module = import_module(urlconf_module) File "C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\importlib__init__.py",
line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level) File "", line 994, in _gcd_import File
"", line 971, in _find_and_load File
"", line 955, in _find_and_load_unlocked
File "", line 665, in _load_unlocked
File "", line 678, in
exec_module File "", line 219, in
_call_with_frames_removed File "C:\Users\1Sun\Cebula3\cebula\urls.py", line 15, in
url(r'^question/$',views.QuestionView.as_view(),name='question'), File
"C:\Users\1Sun\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\viewsets.py",
line 68, in as_view
raise TypeError("The actions argument must be provided when " TypeError: The actions argument must be provided when calling
.as_view() on a ViewSet. For example .as_view({'get': 'list'})