timer.py 文件源码

def stop(self):
        self._callback = None

        if self.oldaction and callable(self.oldaction):
            signal.signal(TIMER_SIGNAL, self.oldaction)
            signal.setitimer(
                TIMER_SIGNAL,
                self.oldtimer[0],
                self.oldtimer[1],
            )
        else:
            signal.signal(TIMER_SIGNAL, signal.SIG_IGN)