clock.py 文件源码

def reset(self, secondsFromNow):
        """Reschedule this call for a different time

        @type secondsFromNow: C{float}
        @param secondsFromNow: The number of seconds from the time of the
        C{reset} call at which this call will be scheduled.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            newTime = self.seconds() + secondsFromNow
            if newTime < self.time:
                self.delayed_time = 0
                self.time = newTime
                self.resetter(self)
            else:
                self.delayed_time = newTime - self.time