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-rw-r--r--lib/sqlalchemy/event/base.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/sqlalchemy/event/base.py b/lib/sqlalchemy/event/base.py
index 4925f6ffa..37bd2c49e 100644
--- a/lib/sqlalchemy/event/base.py
+++ b/lib/sqlalchemy/event/base.py
@@ -195,6 +195,8 @@ class Events(util.with_metaclass(_EventMeta, object)):
class _JoinedDispatcher(object):
"""Represent a connection between two _Dispatch objects."""
+ __slots__ = 'local', 'parent', '_parent_cls'
+
def __init__(self, local, parent):
self.local = local
self.parent = parent