add option for error callback of to shutil.rmtree to accept exception rather than exc_info

[iritkatriel]

shutil.rmtree accepts as onerror a callback to should expect an exc_info tuple. To move off this, I will add a new kwarg "onexc" which should expect just an exception object. onerror will continue to work for now, but be deprecated.

Linked PRs

• gh-102828: add onexc arg to shutil.rmtree. Deprecate onerror. #102829
• gh-102828: fix test failure (add missing skip instructions) #102835
• gh-102828: emit deprecation warning for onerror arg to shutil.rmtree #102850
• gh-102828: set stacklevel on deprecation warning #103422

[serhiy-storchaka]

I think it is too early to deprecate onerror. It only creates inconvenience for code that should support multiple Python versions. Opened #112645 for this.

[kfsone]

What is the urgency in removing the 'onerror' parameter? A concern about shutil.rmtree performance of accepting both arguments? Or is it just part of the core-python lemming-suicide pact to drive users away by making python as consistently self-incompatible as possible?

[iritkatriel]

What is the urgency in removing the 'onerror' parameter?

Nobody indicated any urgency. You made that up just so you can entertain us with your witty insult.