Add `terminate_workers` to `ProcessPoolExecutor`

[csm10495]

Feature or enhancement

Proposal:

This is an interpretation of the feature ask in: https://discuss.python.org/t/cancel-running-work-in-processpoolexecutor/58605/1. It would be a way to stop all the workers running in a ProcessPoolExecutor

p = ProcessPoolExecutor()
# use p

# i know i want p to die at this point no matter what
p.terminate_workers()

Previously the way to do this was to use to loop through the ._processes of the ProcessPoolExecutor though, preferably this should be possible without accessing implementation details.

Has this already been discussed elsewhere?

I have already discussed this feature proposal on Discourse

Links to previous discussion of this feature:

https://discuss.python.org/t/cancel-running-work-in-processpoolexecutor/58605/1

Linked PRs

• gh-128041: Add a terminate_workers method to ProcessPoolExecutor #128043
• gh-128041: Try to fix transiency of test_force_shutdown_workers #130812
• Revert "gh-128041: Add terminate_workers and kill_workers methods to ProcessPoolExecutor (GH-128043)" #130838
• gh-128041: Add terminate_workers and kill_workers methods to ProcessPoolExecutor #130849
• gh-128041: Fix incorrect bullet placement #130900

[gpshead]

thanks for the feature contribution!

[picnixz]

Re-opening because we have some build bots failing (I'm not sure whether the macOS failure is related but the other seems so)

https://github.com/python/cpython/actions/runs/13631446353/job/38099943353#step:11:686
https://buildbot.python.org/#/builders/568/builds/8398

[csm10495]

Opened #130812 to try to fix the transiency. I can't seem to add the skip-news label, but it should get that.