On Tue, Nov 28, 2017 at 11:54 AM, Marko Rauhamaa <ma...@pacujo.net> wrote: > Chris Angelico <ros...@gmail.com>: >> Would the OP have been trivially able to send a signal to the >> process? Yes. > > Python signal handlers are always executed in the main Python thread, > even if the signal was received in another thread. This means that > signals can’t be used as a means of inter-thread communication. > > <URL: https://docs.python.org/3/library/signal.html#signals-and-threads>
Being received in the other thread, it would still interrupt the system call however, wouldn't it? Quoting from the doc: "However, if the target thread is executing the Python interpreter, the Python signal handlers will be executed by the main thread. Therefore, the only point of sending a signal to a particular Python thread would be to force a running system call to fail with InterruptedError." -- https://mail.python.org/mailman/listinfo/python-list
