Support configuring -X frozen_modules=on|off using an environment variable.

[yilei]

Feature or enhancement

Proposal:

Most of the -X options (https://docs.python.org/3/using/cmdline.html#cmdoption-X) can be configured via an environment variable, but not -X frozen_modules.

This makes it harder for environments that you don't have the control over the flags passed to the Python interpreter.

#98697 also includes a use case for crossenv, but the issue was closed because it was not in time for Python 3.11.

I'm proposing a PYTHONFROZENMODULES PYTHON_FROZEN_MODULES environment variable to be added for Python 3.13, which has the equivalent meaning of using -X frozen_modules.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

#98697 is the same request, but closed due to not in time for Python 3.11.

Linked PRs

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

[yilei]

Btw, I'll also send a PR, assuming this will be accepted.

[hugovk]

I'm proposing a PYTHONFROZENMODULES environment variable to be added for Python 3.13, which has the equivalent meaning of using -X frozen_modules.

I'll let others review the PR, but if we do this, let's add underscores to the name:

• PYTHON_FROZEN_MODULES

See https://discuss.python.org/t/change-environment-variable-style/35180?u=hugovk

[hugovk]

Thank you for your contribution!