Sorted single letter imports per the latest version of isort.

django/db/models/__init__.py

@@ -7,7 +7,7 @@ from django.db.models.deletion import (  # NOQA
     CASCADE, DO_NOTHING, PROTECT, SET, SET_DEFAULT, SET_NULL, ProtectedError,
 )
 from django.db.models.expressions import (  # NOQA
-    F, Case, Expression, ExpressionWrapper, Func, Value, When,
+    Case, Expression, ExpressionWrapper, F, Func, Value, When,
 )
 from django.db.models.fields import *  # NOQA
 from django.db.models.fields.files import FileField, ImageField  # NOQA
@@ -15,7 +15,7 @@ from django.db.models.fields.proxy import OrderWrt  # NOQA
 from django.db.models.lookups import Lookup, Transform  # NOQA
 from django.db.models.manager import Manager  # NOQA
 from django.db.models.query import (  # NOQA
-    Q, Prefetch, QuerySet, prefetch_related_objects,
+    Prefetch, Q, QuerySet, prefetch_related_objects,
 )
 
 # Imports that would create circular imports if sorted

django/db/models/query.py

@@ -16,10 +16,10 @@ from django.db import (
 from django.db.models import sql
 from django.db.models.constants import LOOKUP_SEP
 from django.db.models.deletion import Collector
-from django.db.models.expressions import F, Date, DateTime
+from django.db.models.expressions import Date, DateTime, F
 from django.db.models.fields import AutoField
 from django.db.models.query_utils import (
-    Q, InvalidQuery, check_rel_lookup_compatibility, deferred_class_factory,
+    InvalidQuery, Q, check_rel_lookup_compatibility, deferred_class_factory,
 )
 from django.db.models.sql.constants import CURSOR
 from django.utils import six, timezone

django/db/models/sql/query.py

@@ -19,7 +19,7 @@ from django.db.models.constants import LOOKUP_SEP
 from django.db.models.expressions import Col, Ref
 from django.db.models.fields.related_lookups import MultiColSource
 from django.db.models.query_utils import (
-    Q, PathInfo, check_rel_lookup_compatibility, refs_expression,
+    PathInfo, Q, check_rel_lookup_compatibility, refs_expression,
 )
 from django.db.models.sql.constants import (
     INNER, LOUTER, ORDER_DIR, ORDER_PATTERN, QUERY_TERMS, SINGLE,