manager.py 文件源码

def poll(self):
        """
        Polls once and yields each ready-to-be-read
        file-descriptor
        """
        try:
            events = self.poller.poll(timeout=self.timeout)
        except IOError:
            events = []

        for fd, event in events:
            if event | select.EPOLLIN | select.EPOLLPRI:
                yield fd