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Diffstat (limited to 'Doc/library/types.rst')
| -rw-r--r-- | Doc/library/types.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Doc/library/types.rst b/Doc/library/types.rst index 118bc4c..5eb84c1 100644 --- a/Doc/library/types.rst +++ b/Doc/library/types.rst @@ -53,8 +53,20 @@ Dynamic Type Creation in *kwds* argument with any ``'metaclass'`` entry removed. If no *kwds* argument is passed in, this will be an empty dict. + .. impl-detail:: + + CPython uses :class:`collections.OrderedDict` for the default + namespace. + .. versionadded:: 3.3 + .. versionchanged:: 3.6 + + The default value for the ``namespace`` element of the returned + tuple has changed from :func:`dict`. Now an insertion-order- + preserving mapping is used when the metaclass does not have a + ``__prepare__`` method, + .. seealso:: :ref:`metaclasses` |