gh-95023: Added os.setns and os.unshare to easily switch between namespaces on Linux by noamcohen97 · Pull Request #95046 · python/cpython
Just providing the bear functions with out examples and descriptions seems like half a job.
There is no need for such a negative tone; please try to be more encouraging when leaving review comments. Noam has followed the dev flow by creating an issue, explaining the need for this change, and has provided a very well written patch, complete with docs, tests, and a NEWS entry. I think he has done a great job, and I welcome his interest in making CPython better.
I welcome your interest in helping review PRs. Reviewing PRs is a difficult task; often more difficult than writing the code (or the docs) itself. I know the devguide is lacking when it comes to "how to review PRs". For now, the best thing to do is IMO to observe how others, more experienced reviewers, perform this task, and learn from them. Personally, I often find reviewing PRs difficult, and I often use far more time when reviewing a PR than I would use to write one.