.. moduleauthor:: Raymond Hettinger <python at rcn.com>
.. sectionauthor:: Raymond Hettinger <python at rcn.com>
+.. versionadded:: 3.3
+ Formerly, this module was part of the :mod:`collections` module.
+
.. testsetup:: *
from collections import *
can be used to test whether a class provides a particular interface; for
example, whether it is hashable or whether it is a mapping.
-.. versionchanged:: 3.3
- Formerly, this module was part of the :mod:`collections` module.
.. _collections-abstract-base-classes: