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whatsnew: LOAD_CLASSDEREF, -X showrefcount

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R David Murray 2014-02-12 13:00:36 -05:00
parent 8da4fb5a1c
commit af7d2c4917
2 changed files with 10 additions and 0 deletions
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Doc/reference/datamodel.rst
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@ -1647,6 +1647,8 @@ of these candidate metaclasses. If none of the candidate metaclasses meets
that criterion, then the class definition will fail with ``TypeError``. that criterion, then the class definition will fail with ``TypeError``.
.. _prepare:
Preparing the class namespace Preparing the class namespace
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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Doc/whatsnew/3.4.rst
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@ -1455,6 +1455,10 @@ Other Improvements
now works correctly (previously it silently returned the first python now works correctly (previously it silently returned the first python
module in the file). (Contributed by Václav Šmilauer in :issue:`16421`.) module in the file). (Contributed by Václav Šmilauer in :issue:`16421`.)
* A new opcode, :opcode:`LOAD_CLASSDEREF`, has been added to fix a bug in the
loading of free variables in class bodies that could be triggered by certain
uses of :ref:`__prepare__ <prepare>`. (Contributed by Benjamin Peterson in
:issue:`17853`.)
Significant Optimizations Significant Optimizations
@ -1650,6 +1654,10 @@ Changes in 'python' command behavior
how :envvar:`PATH` works. The behavior now conforms to the posix convention how :envvar:`PATH` works. The behavior now conforms to the posix convention
for :envvar:`PATH`. for :envvar:`PATH`.
* The [X refs, Y blocks] output of a debug (``--with-pydebug``) build of the
CPython interpreter is now off by default. It can be re-enabled using the
``-X showrefcount`` option. (Contributed by Ezio Melotti in :issue:`17323`.)
Changes in the Python API Changes in the Python API
------------------------- -------------------------