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gh-111374: Add a new PYTHON_FROZEN_MODULES env var, equivalent of -X frozen_modules. (#111411)

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Adds a new PYTHON_FROZEN_MODULES env var to correspond with -X frozen_modules.

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
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Yilei Yang 2023-11-01 13:39:31 -07:00 • committed by GitHub
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Doc/using/cmdline.rst
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@ -535,12 +535,13 @@ Miscellaneous options
location indicators when the interpreter displays tracebacks. See also
:envvar:`PYTHONNODEBUGRANGES`.
* ``-X frozen_modules`` determines whether or not frozen modules are
ignored by the import machinery. A value of "on" means they get
imported and "off" means they are ignored. The default is "on"
ignored by the import machinery. A value of ``on`` means they get
imported and ``off`` means they are ignored. The default is ``on``
if this is an installed Python (the normal case). If it's under
development (running from the source tree) then the default is "off".
Note that the "importlib_bootstrap" and "importlib_bootstrap_external"
frozen modules are always used, even if this flag is set to "off".
development (running from the source tree) then the default is ``off``.
Note that the :mod:`!importlib_bootstrap` and
:mod:`!importlib_bootstrap_external` frozen modules are always used, even
if this flag is set to ``off``. See also :envvar:`PYTHON_FROZEN_MODULES`.
* ``-X perf`` enables support for the Linux ``perf`` profiler.
When this option is provided, the ``perf`` profiler will be able to
report Python calls. This option is only available on some platforms and
@ -1095,6 +1096,20 @@ conflict.
.. versionadded:: 3.13
.. envvar:: PYTHON_FROZEN_MODULES
If this variable is set to ``on`` or ``off``, it determines whether or not
frozen modules are ignored by the import machinery. A value of ``on`` means
they get imported and ``off`` means they are ignored. The default is ``on``
for non-debug builds (the normal case) and ``off`` for debug builds.
Note that the :mod:`!importlib_bootstrap` and
:mod:`!importlib_bootstrap_external` frozen modules are always used, even
if this flag is set to ``off``.
See also the :option:`-X frozen_modules <-X>` command-line option.
.. versionadded:: 3.13
Debug-mode variables
~~~~~~~~~~~~~~~~~~~~