Signal handler, python

Question

I have a multithreaded program and use the signal.signal(SIGINT,func) to kill all threads when ctrl c is pressed. The question I have is this:

I have to call signal.signal(...) from main in python. Do I have to call that on a loop or can I just set it once and whenever the user presses ctrl c, the signal will be caught?

Alex Martelli · Accepted Answer · 2010-09-22 02:27:12Z

2

Only the main tread can handle signals. Just make all your threads "daemonic" ones (set the thread object's .daemon property to True before you start the thread) to ensure the threads terminate when the main thread does.

answered Sep 22, 2010 at 2:27

Alex Martelli

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3 Comments

Juli Over a year ago

Ok, thanks, but in main, do I need to call signa.signal(SIGINT, func) in a loop (e.g. While true) or can I just call it once in main?

Alex Martelli Over a year ago

@Juli, just once, as long as main terminates as a result of executing func.

n611x007 Over a year ago

you say that .daemon == True threads will be interrupted and killed when the main thread terminates?

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