backends: PEP8ness, style (#30252)

src/authentic2/backends/models_backend.py

@@ -1,8 +1,25 @@
+#
+# Copyright (C) 2010-2019 Entr'ouvert
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published
+# by the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 from __future__ import unicode_literals
 
 from django.db import models
 from django.contrib.auth import get_user_model
 from django.contrib.auth.backends import ModelBackend
+from django.utils import six
 
 from .. import app_settings
 from authentic2.user_login_failure import user_login_success, user_login_failure
@@ -39,10 +56,10 @@ class ModelBackend(ModelBackend):
                 if app_settings.REALMS:
                     for realm, desc in app_settings.REALMS:
                         queries.append(models.Q(
-                                **{username_field: upn(username, realm)}))
+                            **{username_field: upn(username, realm)}))
         else:
             queries.append(models.Q(**{username_field: upn(username, realm)}))
-        return reduce(models.Q.__or__, queries)
+        return six.moves.reduce(models.Q.__or__, queries)
 
     def must_reset_password(self, user):
         from .. import models