python multiprocessing - run logic when process terminates

Question

When using Python multiprocessing, what is the proper way to ensure code will run to cleanup whenever a process exits (both cleanly or on fatal error.)

If I am writing my processes as inheriting from the Process object, should I put this functionality in the __del__ method of the object? I tried putting simple log statements into terminate, but it doesn't seem to execute when the script receives a SIGHUP or KeyboardInterrupt.

mirk · Accepted Answer · 2012-10-04 17:59:21Z

1

Python has atexit-handlers, which are pretty reliable in my experience.

answered Oct 4, 2012 at 17:59

mirk

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2 Comments

senderle Over a year ago

Yeah -- IIRC, atexit doesn't handle signals though.

mirk Over a year ago

@senderie: you are right. signals not handled by python, will bypass the atexit-handler. I guess it is possible to write signal-handlers for those cases. The docs have all the smallprint.

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