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[2.7] bpo-31733, bpo-31692: Document 2 new env vars in What's New in Python 2.7 #4019

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vstinner merged 2 commits into from
Oct 17, 2017
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[2.7] bpo-31733, bpo-31692: Document 2 new env vars in What's New in Python 2.7 #4019

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Document 2 new env vars in What's New in Python 2.7
vstinner Oct 17, 2017
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Address Diana Clarke's review
vstinner Oct 17, 2017
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15 changes: 15 additions & 0 deletions Doc/whatsnew/2.7.rst
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Expand Up @@ -2540,6 +2540,21 @@ exemption allowing new ``-3`` warnings to be added in any Python 2.7
maintenance release.


Two new environment variables for debug mode
--------------------------------------------

In debug mode, the ``[xxx refs]`` statistic is not written by default, the
:envvar:`PYTHONSHOWREFCOUNT` environment variable now must also be set.
(Contributed by Victor Stinner; :issue:`31733`.)

When Python is compiled with ``COUNT_ALLOC`` defined, allocation counts are no
longer dumped by default anymore: the :envvar:`PYTHONSHOWALLOCCOUNT` environment
variable must now also be set. Moreover, allocation counts are now dumped into
stderr, rather than stdout. (Contributed by Victor Stinner; :issue:`31692`.)

.. versionadded:: 2.7.15


PEP 434: IDLE Enhancement Exception for All Branches
----------------------------------------------------

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