1 files changed, 3 insertions, 6 deletions

diff --git a/src/mailman/app/subscriptions.py b/src/mailman/app/subscriptions.py
index 99c6ab2de..e3239e97e 100644
--- a/src/mailman/app/subscriptions.py
+++ b/src/mailman/app/subscriptions.py
@@ -15,11 +15,8 @@
 # You should have received a copy of the GNU General Public License along with
 # GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
 
-"""Module stuff."""
+"""Handle subscriptions."""
 
-from __future__ import absolute_import, print_function, unicode_literals
-
-__metaclass__ = type
 __all__ = [
     'SubscriptionService',
     'handle_ListDeletingEvent',
@@ -108,7 +105,7 @@ class SubscriptionService:
         # the parameter can either be an email address or a user id.
         query = []
         if subscriber is not None:
-            if isinstance(subscriber, basestring):
+            if isinstance(subscriber, str):
                 # subscriber is an email address.
                 address = user_manager.get_address(subscriber)
                 user = user_manager.get_user(subscriber)
@@ -148,7 +145,7 @@ class SubscriptionService:
         if mlist is None:
             raise NoSuchListError(list_id)
         # Is the subscriber an email address or user id?
-        if isinstance(subscriber, basestring):
+        if isinstance(subscriber, str):
             if display_name is None:
                 display_name, at, domain = subscriber.partition('@')
             # Because we want to keep the REST API simple, there is no