portable_getch.py 文件源码

def __call__(self, timeout):
        import sys, tty, termios
        from select import select

        ch = None
        fd = sys.stdin.fileno()
        old_settings = termios.tcgetattr(fd)
        try:
            tty.setraw(sys.stdin.fileno())
            rlist, _, _ = select([sys.stdin], [], [], timeout)

            if rlist:
                ch = ord(sys.stdin.read(1))
        finally:
            termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
        return ch