[Python-ideas] Asynchronous exception handling around with/try statement borders

[Chris Angelico]

On Fri, Sep 21, 2018 at 8:52 AM Kyle Lahnakoski <klahnakoski at mozilla.com> wrote:
> Since the java.lang.Thread.stop() "debacle", it has been obvious that
> stopping code to run other code has been dangerous.  KeyboardInterrupt
> (any interrupt really) is dangerous. Now, we can probably code a
> solution, but how about we remove the danger:
>
> I suggest we remove interrupts from Python, and make them act more like
> java.lang.Thread.interrupt(); setting a thread local bit to indicate an
> interrupt has occurred.  Then we can write explicit code to check for
> that bit, and raise an exception in a safe place if we wish.  This can
> be done with Python code, or convenient places in Python's C source
> itself.  I imagine it would be easier to whitelist where interrupts can
> raise exceptions, rather than blacklisting where they should not.

The time machine strikes again!

https://docs.python.org/3/c-api/exceptions.html#signal-handling

ChrisA