websocketclient.py 文件源码

def start(self):
        """Start

        Start trapping WINCH signals and resizing the PTY.
        This method saves the previous WINCH handler so it can be restored on
        `stop()`.
        """

        def handle(signum, frame):
            if signum == signal.SIGWINCH:
                LOG.debug("Send command to resize the tty session")
                self.client.handle_resize()

        self.original_handler = signal.signal(signal.SIGWINCH, handle)