select.py 文件源码

def poll(self, timeout):
        readable, writeable, errors = select.select(
            self.read_fds, self.write_fds, self.error_fds, timeout)
        events = {}
        for fd in readable:
            events[fd] = events.get(fd, 0) | IOLoop.READ
        for fd in writeable:
            events[fd] = events.get(fd, 0) | IOLoop.WRITE
        for fd in errors:
            events[fd] = events.get(fd, 0) | IOLoop.ERROR
        return events.items()