(self)
start polling

        If already running, this has no effect. If the source was started and then
        stopped again, this will restart the ``self.run`` coroutine.
start polling
start polling
def start(self):
        """start polling

        If already running, this has no effect. If the source was started and then
        stopped again, this will restart the ``self.run`` coroutine.
        """
        if self.stopped:
            self.stopped = False
            self.started = True
            self.loop.add_callback(self.run)
def start ( self ) : if self . stopped : self . stopped = False self . started = True self . loop . add_callback ( self . run )