1 files changed, 12 insertions, 9 deletions
diff --git a/django/db/models/query.py b/django/db/models/query.py
index 2b7aab6ac4..0ec3cfd730 100644
--- a/django/db/models/query.py
+++ b/django/db/models/query.py
@@ -2,25 +2,28 @@
 The main QuerySet implementation. This provides the public API for the ORM.
 """
 
-from collections import deque, OrderedDict
 import copy
 import sys
 import warnings
+from collections import OrderedDict, deque
 
 from django.conf import settings
 from django.core import exceptions
-from django.db import (connections, router, transaction, IntegrityError,
-    DJANGO_VERSION_PICKLE_KEY)
+from django.db import (
+    DJANGO_VERSION_PICKLE_KEY, IntegrityError, connections, router,
+    transaction,
+)
+from django.db.models import sql
 from django.db.models.constants import LOOKUP_SEP
-from django.db.models.fields import AutoField, Empty
-from django.db.models.query_utils import Q, deferred_class_factory, InvalidQuery
 from django.db.models.deletion import Collector
+from django.db.models.expressions import F, Date, DateTime
+from django.db.models.fields import AutoField, Empty
+from django.db.models.query_utils import (
+    Q, InvalidQuery, deferred_class_factory,
+)
 from django.db.models.sql.constants import CURSOR
-from django.db.models import sql
-from django.db.models.expressions import Date, DateTime, F
+from django.utils import six, timezone
 from django.utils.functional import partition
-from django.utils import six
-from django.utils import timezone
 from django.utils.version import get_version
 
 # The maximum number of items to display in a QuerySet.__repr__