periodic.py 文件源码

def start(self, right_away=True):
        if self._greenlet:
            raise RuntimeError("Periodic already started.")

        self._greenlet = Greenlet(self._run)
        self._greenlet.link(self._discard_greenlet)

        if right_away:
            self._greenlet.start()
        else:
            self._greenlet.start_later(self.interval)