Moved EmpytResultSet to django.core.exceptions.

This removes the need for some inner imports.

1 files changed, 2 insertions, 4 deletions

diff --git a/django/db/models/sql/datastructures.py b/django/db/models/sql/datastructures.py
index 42f2d8790d..02e4f930e1 100644
--- a/django/db/models/sql/datastructures.py
+++ b/django/db/models/sql/datastructures.py
@@ -2,13 +2,11 @@
 Useful auxiliary data structures for query construction. Not useful outside
 the SQL domain.
 """
+# for backwards-compatibility in Django 1.11
+from django.core.exceptions import EmptyResultSet  # NOQA: F401
 from django.db.models.sql.constants import INNER, LOUTER
 
 
-class EmptyResultSet(Exception):
-    pass
-
-
 class MultiJoin(Exception):
     """
     Used by join construction code to indicate the point at which a