Python-сообщество

def new_authors(request):   
    new_authors = UserProfile.get_new_authors_entries()
    # UserProfile.get_new_authors_entries() retrun:
    #[
    #   {
    #       'id': 4, 
    #       'date_joined': datetime.datetime(2014, 9, 22, 13, 37, 25, 866974, tzinfo=<UTC>), 
    #       'username': 'zzzzzz'
    #   }, 
    #   {
    #       'id': 5, 
    #       'date_joined': datetime.datetime(2014, 9, 22, 13, 37, 25, 866974, tzinfo=<UTC>), 
    #       'username': 'wwwwww'
    #   }
    #]
    return HttpResponse(json.dumps(new_authors), content_type='application/json')  

class UserProfile(User):            
    @classmethod
    def get_new_authors_entries(self, cut_begin=0, cut_end=2):
        return self.objects.filter(is_active=1, is_superuser=0).values('id', 'date_joined', 'username').order_by('-date_joined')[cut_begin:cut_end]

 from django.core.serializers.json import DjangoJSONEncoder
 data =  json.dumps(data, cls=DjangoJSONEncoder)