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In the following example, if I kill the child process, the parent is immediatly done:
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from os import getpid
from time import sleep
from multiprocessing import Process
def f(sec):
 print("child %s: wait %s seconds" % (getpid(), sec))
 sleep(sec)
if __name__ == '__main__':
 print("parent %s: wait child" % (getpid(),))
 p = Process(target=f, args=(30,))
 p.start()
 p.join()
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