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-rw-r--r--mailman/interfaces/errors.py7
1 files changed, 7 insertions, 0 deletions
diff --git a/mailman/interfaces/errors.py b/mailman/interfaces/errors.py
index b174aa3cf..608193f7a 100644
--- a/mailman/interfaces/errors.py
+++ b/mailman/interfaces/errors.py
@@ -22,6 +22,13 @@ components. More specific exceptions will be located in the relevant
interfaces.
"""
+from __future__ import absolute_import, unicode_literals
+
+__metaclass__ = type
+__all__ = [
+ 'MailmanError',
+ ]
+
class MailmanError(Exception):