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Issue #24254: Drop cls.__definition_order__.

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Eric Snow 2016-09-08 15:11:11 -07:00
parent 7f730cf01d
commit 4f29e75289
16 changed files with 193 additions and 533 deletions
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12
Doc/reference/compound_stmts.rst
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@ -634,15 +634,9 @@ dictionary. The class name is bound to this class object in the original local
namespace.
The order in which attributes are defined in the class body is preserved
in the ``__definition_order__`` attribute on the new class. If that order
is not known then the attribute is set to :const:`None`. The class body
may include a ``__definition_order__`` attribute. In that case it is used
directly. The value must be a tuple of identifiers or ``None``, otherwise
:exc:`TypeError` will be raised when the class statement is executed.
.. versionchanged:: 3.6
Add ``__definition_order__`` to classes.
in the new class's ``__dict__``. Note that this is reliable only right
after the class is created and only for classes that were defined using
the definition syntax.
Class creation can be customized heavily using :ref:`metaclasses <metaclasses>`.

7
Doc/reference/datamodel.rst
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@ -1752,13 +1752,6 @@ additional keyword arguments, if any, come from the class definition).
If the metaclass has no ``__prepare__`` attribute, then the class namespace
is initialised as an empty ordered mapping.
.. impl-detail::
In CPython the default is :class:`collections.OrderedDict`.
.. versionchanged:: 3.6
Defaults to :class:`collections.OrderedDict` instead of :func:`dict`.
.. seealso::
:pep:`3115` - Metaclasses in Python 3000