[Python-checkins] cpython: whatsnew: PEP 424 implementation.
r.david.murray
python-checkins at python.org
Mon Mar 10 23:11:39 CET 2014
http://hg.python.org/cpython/rev/fada398b5d83
changeset: 89570:fada398b5d83
user: R David Murray <rdmurray at bitdance.com>
date: Mon Mar 10 15:00:33 2014 -0400
summary:
whatsnew: PEP 424 implementation.
files:
Doc/c-api/object.rst | 6 +++---
Doc/library/operator.rst | 4 ++--
Doc/whatsnew/3.4.rst | 13 +++++++++++++
Misc/NEWS | 3 +++
4 files changed, 21 insertions(+), 5 deletions(-)
diff --git a/Doc/c-api/object.rst b/Doc/c-api/object.rst
--- a/Doc/c-api/object.rst
+++ b/Doc/c-api/object.rst
@@ -357,9 +357,9 @@
.. 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
diff --git a/Doc/library/operator.rst b/Doc/library/operator.rst
--- a/Doc/library/operator.rst
+++ b/Doc/library/operator.rst
@@ -240,9 +240,9 @@
.. 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
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst
--- a/Doc/whatsnew/3.4.rst
+++ b/Doc/whatsnew/3.4.rst
@@ -393,6 +393,10 @@
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 @@
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 @@
<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:
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -2538,6 +2538,9 @@
- 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
--
Repository URL: http://hg.python.org/cpython
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