run statements when python script is terminated

Question

I have a subprocess running from a python script and I would like to kill this process if the user terminates python (ctrl+D or ctrl+Z or quit()). Is there a function I can define in my python script that will run automatically right before the python script is exited?

mgilson · Accepted Answer · 2012-10-15 14:58:37Z

4

You can use the atexit module to register functions to be run.

import atexit

def bar():
   print "World"
atexit.register(bar)

#atexit.register also can be used as a decorator since it returns
# the function:
@atexit.register
def foo():
   print "Goodbye"

These functions will be run unless the script exits with os._exit (which it shouldn't) or unless the script causes python to encounter a serious error (e.g a Segmentation Fault) which doesn't usually happen, but can if you're using C extensions that are buggy.

edited Oct 15, 2012 at 14:58

answered Oct 15, 2012 at 14:53

mgilson

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