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

bpo-31733, bpo-31692: Document the new PYTHONSHOWREFCOUNT and
PYTHONSHOWALLOCCOUNT environment variables.
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Victor Stinner 2017-10-17 13:13:13 -07:00 committed by GitHub
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@ -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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