Issue 10357: Clarify what it means to be a mapping.

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Raymond Hettinger 2011-01-08 23:50:39 +00:00
parent d43245a965
commit c4c52dd23d
1 changed files with 5 additions and 3 deletions

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@ -442,9 +442,11 @@ Glossary
:term:`finder`. See :pep:`302` for details.
mapping
A container object (such as :class:`dict`) which supports arbitrary key
lookups using the special method :meth:`__getitem__`. Mappings also
support :meth:`__len__`, :meth:`__iter__`, and :meth:`__contains__`.
A container object that supports arbitrary key lookups and implements the
methods specified in the :class:`Mapping` or :class:`MutableMapping`
:ref:`abstract base classes <abstract-base-classes>`. Examples include
:class:`dict`, :class:`collections.defaultdict`,
:class:`collections.OrderedDict` and :class:`collections.Counter`.
metaclass
The class of a class. Class definitions create a class name, a class