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-rw-r--r--src/mailman/rules/no_subject.py6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/mailman/rules/no_subject.py b/src/mailman/rules/no_subject.py
index 1a2bab1d5..1fd0dfb8b 100644
--- a/src/mailman/rules/no_subject.py
+++ b/src/mailman/rules/no_subject.py
@@ -17,7 +17,7 @@
"""The no-Subject header rule."""
-from __future__ import absolute_import, unicode_literals
+from __future__ import absolute_import, print_function, unicode_literals
__metaclass__ = type
__all__ = [
@@ -25,16 +25,16 @@ __all__ = [
]
-from zope.interface import implements
+from zope.interface import implementer
from mailman.core.i18n import _
from mailman.interfaces.rules import IRule
+@implementer(IRule)
class NoSubject:
"""The no-Subject rule."""
- implements(IRule)
name = 'no-subject'
description = _('Catch messages with no, or empty, Subject headers.')