如何在django中为用户模型添加自定义权限？

from django.core.exceptions import PermissionDenied
from django.contrib.auth.models import Permission

class CanEditUser(Permission):
    def has_permission(self, request, view):
        if request.user.is_authenticated and request.user.has_perm('app_name.can_edit_user'):
            return True
        else:
            raise PermissionDenied

    def has_object_permission(self, request, view, obj):
        if request.user.is_authenticated and request.user.has_perm('app_name.can_edit_user') and obj == request.user:
            return True
        else:
            raise PermissionDenied

from django.contrib.auth.decorators import permission_required
from django.views.decorators.vary import vary_on_headers
from django.utils.decorators import method_decorator
from django.views import View
from .can_edit_user import CanEditUser

@method_decorator(permission_required('app_name.can_edit_user'), name='dispatch')
@vary_on_headers('Authorization')
class EditUserView(View):
    pass

from django.contrib.auth.decorators import permission_required
from django.views.decorators.vary import vary_on_headers
from django.utils.decorators import method_decorator
from django.views import View
from .can_edit_user import CanEditUser

class EditUserView(View):
    permission_classes = [CanEditUser]

from django.contrib.auth.models import User, Permission

user = User.objects.get(username='your_username')
permission = Permission.objects.get(codename='can_edit_user', content_type__app_label='app_name')
user.user_permissions.add(permission)