util.py 文件源码

def get_terminal_size(fd=1, defaultx=80, defaulty=25):
        """Returns height and width of current terminal. First tries to get
        size via termios.TIOCGWINSZ, then from environment. Defaults to 25
        lines x 80 columns if both methods fail.

        :param fd: file descriptor (default: 1=stdout)
        :defaultx: The value to return for x if unable to determine
        (default: 80)
        :param fd: The value to return for y if unable to determine
        (default: 80)
        """
        try:
            import fcntl, termios, struct
            hw = struct.unpack('hh', fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234'))
            wh = (hw[1], hw[0])
        except:
            try:
                wh = (os.environ['COLUMNS'], os.environ['LINES'])
            except:
                wh = (80, 25)
        return wh