A lightweight cooperative timeout mechanism for synchronous code `with timeout(seconds):`

[GalaxySnail]

Related discussions about cancellations at the Python level:

Cancelling threads

I’ve been writing an application that makes extensive use of threads (I’d love to use virtual threads someday), and I’ve been really wishing that I had a reliable way to gracefully cancel threads. In prior discussions, it has been rightly noted that, ultimately, threads cannot be forcibly aborted and keep the process stable. I want the process to be stable, however I don’t strictly need my threads to be forcibly aborted. I can live with forcible abortions only being possible with isolated proce…

Are context managers safe with ansychronous exceptions or signals

This is a known and discussed problem that unfortunately is very hard to fix. Nathaniel Smith @njs did some very thorough blog posts on the subject during his work on trio which led to some fixes and I think a solution that allowed ContextManagers in C to be able to behave atomically but for those in python I it was substantially harder since they involve multiple op-codes. Sorry I don’t have time to provide direct references right now but do a search for those as well as related reports before …

Control-C handling in Python and Trio — njs blog

(By the way, Trio changed its KeyboarInterrupt protection implementation in v0.28.0, slightly different implementation, but the same idea.)