running=True def clean(a=None,b=None): print "clean" running = False from signal import signal,SIGTERM,SIGINT,SIGQUIT signal(SIGTERM,clean) signal(SIGINT,clean) signal(SIGQUIT,clean) while running: sleep(0.1)
当Ctrl+C时这个例子会打印clean。
但是signal只在主线程有效,如果主线程结束,在一个工作线程监听是没有效果的,比如:
class Master(threading.Thread): def __init__(self): threading.Thread.__init__(self) self.master_running = True def cancel(self): self.running=False def run(self): while self.master_running: sleep(1) def clean(a=None,b=None): print "clean" from signal import signal,SIGTERM,SIGINT,SIGQUIT signal(SIGTERM,clean) signal(SIGINT,clean) signal(SIGQUIT,clean) m = Master() m.start()
这个例子不会打印clean。