iostream.py A utility class to write to and read from a non-blocking socket. IOStream 对 socket 进行包装,采用注册回调方式实现非阻塞。 通过接口注册各个事件回调 _read_callback _write_callback _close_callback _connect_callback ioloop 中 socket 事件发生后,调用 IOStream._handle_events 方法,对事件进...