whatsnew: PEP 424 implementation.

This commit is contained in:
R David Murray 2014-03-10 15:00:33 -04:00
parent d840b8d613
commit e8db162f62
4 changed files with 21 additions and 5 deletions

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@ -357,9 +357,9 @@ attribute is considered sufficient for this determination.
.. c:function:: Py_ssize_t PyObject_LengthHint(PyObject *o, Py_ssize_t default)
Return an estimated length for the object *o*. First trying to return its
actual length, then an estimate using ``__length_hint__``, and finally
returning the default value. On error ``-1`` is returned. This is the
Return an estimated length for the object *o*. First try to return its
actual length, then an estimate using :meth:`~object.__length_hint__`, and
finally return the default value. On error return ``-1``. This is the
equivalent to the Python expression ``operator.length_hint(o, default)``.
.. versionadded:: 3.4

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@ -240,9 +240,9 @@ their character equivalents.
.. function:: length_hint(obj, default=0)
Return an estimated length for the object *o*. First trying to return its
Return an estimated length for the object *o*. First try to return its
actual length, then an estimate using :meth:`object.__length_hint__`, and
finally returning the default value.
finally return the default value.
.. versionadded:: 3.4

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@ -393,6 +393,10 @@ Some smaller changes made to the core Python language are:
several cases as a result of the introduction of Argument Clinic and other
changes to the :mod:`inspect` and :mod:`pydoc` modules.
* :meth:`~object.__length_hint__` is now part of the formal language
specification (see :pep:`424`). (Contributed by Armin Ronacher in
:issue:`16148`.)
New Modules
===========
@ -1098,6 +1102,11 @@ There is now a pure-python version of the :mod:`operator` module available for
reference and for use by alternate implementations of Python. (Contributed by
Zachary Ware in :issue:`16694`.)
New function :func:`~operator.length_hint` provides an implementation of the
specification for how the :meth:`~object.__length_hint__` special method should
be used, as part of the :pep:`424` formal specification of this language
feature. (Contributed by Armin Ronacher in :issue:`16148`.)
os
--
@ -1800,6 +1809,10 @@ Other Build and C API Changes
<http://en.wikipedia.org/wiki/Data_Execution_Prevention>`_. (Contributed by
Christian Heimes in :issue:`16632`.)
* New function :c:func:`PyObject_LengthHint` is the C API equivalent
of :func:`operator.length_hint`. (Contributed by Armin Ronacher in
:issue:`16148`.)
.. _other-improvements-3.4:

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@ -2538,6 +2538,9 @@ Core and Builtins
- Issue #16160: Subclass support now works for types.SimpleNamespace.
- Issue #16148: Implement PEP 424, adding operator.length_hint and
PyObject_LengthHint.
- Upgrade Unicode data (UCD) to version 6.2.
- Issue #15379: Fix passing of non-BMP characters as integers for the charmap