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| author | Georg Brandl <georg@python.org> | 2012-04-03 07:16:46 (GMT) |
|---|---|---|
| committer | Georg Brandl <georg@python.org> | 2012-04-03 07:16:46 (GMT) |
| commit | 283b96b6bd974179b7f7f93f1c4631c3cc20c96d (patch) | |
| tree | 899d03eb3a70b39c8b5c40e4f9d66558a7eca06d /Doc | |
| parent | 39f0037735562462efeebb11f319bd8b71a32c46 (diff) | |
| download | cpython-283b96b6bd974179b7f7f93f1c4631c3cc20c96d.zip cpython-283b96b6bd974179b7f7f93f1c4631c3cc20c96d.tar.gz cpython-283b96b6bd974179b7f7f93f1c4631c3cc20c96d.tar.bz2 | |
Move ChainMap versionadded to be less ambiguous.
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/collections.rst | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst index 5298dbc..71c27ed 100644 --- a/Doc/library/collections.rst +++ b/Doc/library/collections.rst @@ -41,6 +41,8 @@ Python's general purpose built-in containers, :class:`dict`, :class:`list`, :class:`ChainMap` objects ------------------------- +.. versionadded:: 3.3 + A :class:`ChainMap` class is provided for quickly linking a number of mappings so they can be treated as a single unit. It is often much faster than creating a new dictionary and running multiple :meth:`~dict.update` calls. @@ -91,8 +93,6 @@ The class can be used to simulate nested scopes and is useful in templating. The use-cases also parallel those for the builtin :func:`super` function. A reference to ``d.parents`` is equivalent to: ``ChainMap(*d.maps[1:])``. - .. versionadded:: 3.3 - Example of simulating Python's internal lookup chain:: import builtins |