基于类的干净使用解决方案：
import signal
import time
class GracefulKiller:
kill_Now = False
def __init__(self):
signal.signal(signal.SIGINT, self.exit_gracefully)
signal.signal(signal.SIGTERM, self.exit_gracefully)
def exit_gracefully(self,signum, frame):
self.kill_Now = True
if __name__ == '__main__':
killer = GracefulKiller()
while not killer.kill_Now:
time.sleep(1)
print("doing something in a loop ...")
print "End of the program. I was killed gracefully :)"
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