summaryrefslogtreecommitdiff
path: root/lib/sqlalchemy/sql/traversals.py
diff options
context:
space:
mode:
Diffstat (limited to 'lib/sqlalchemy/sql/traversals.py')
-rw-r--r--lib/sqlalchemy/sql/traversals.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/traversals.py b/lib/sqlalchemy/sql/traversals.py
index 84a5623d3..68a3a0749 100644
--- a/lib/sqlalchemy/sql/traversals.py
+++ b/lib/sqlalchemy/sql/traversals.py
@@ -29,6 +29,8 @@ def compare(obj1, obj2, **kw):
class HasCacheKey(object):
_cache_key_traversal = NO_CACHE
+ __slots__ = ()
+
def _gen_cache_key(self, anon_map, bindparams):
"""return an optional cache key.