How to use the getch.getch.getch function in getch

:param message: The prompt message.
    :param default: Default `None`. The default input value.
    :param characters: Default `None`. Case-insensitive constraint for single-
        character input.
    """
    if isinstance(default, basestring):
        message = "{0} [{1}]".format(message, default)

    if characters:
        puts("{0} ".format(message), newline=False)
    else:
        message = "{0}: ".format(message)

    while True:
        if characters:
            ret_val = getch()

            if default is not None and ret_val in (chr(CR), chr(LF)):
                puts()
                ret_val = default
                break
            if ret_val in characters.lower() or ret_val in characters.upper():
                puts()

                if ret_val not in characters:
                    ret_val = ret_val.swapcase()

                break
            elif isctrl(ret_val) and ctrl(ret_val) in (chr(ETX), chr(EOT)):
                raise KeyboardInterrupt()
        else:
            ret_val = raw_input(message).strip() or default

def key_driver(servo):
    """Drive servos based on keyboard input.

    Loops indefinitely until 'q' (quit) is typed.
    """
    inc = 5

    while True:
        keypress = getch.getch()
        if keypress == 'q':
            go_home(servo)
            servo.close()
            break

        if keypress == 'j':
            RANGES[0] += inc
        elif keypress == 'l':
            RANGES[0] += -1*inc
        elif keypress == 'i':
            RANGES[1] += inc
        elif keypress == 'k':
            RANGES[1] += -1*inc

        for index, target in enumerate(RANGES):
            set_target(servo, index, target)

def pause(message='Press any key to continue . . . '):
    """
    Prints the specified message if it's not None and waits for a keypress.
    """
    if message is not None:
        print(message, end='')
        sys.stdout.flush()
    getch()
    print()

:param default: Default `None`. The default input value.
    :param characters: Default `None`. Case-insensitive constraint for single-
        character input.
    :param echo: Default `True`. Determine if input is echoed.
    """
    if default and isinstance(default, basestring):
        message = "{0} [{1}]".format(message, default)

    if characters:
        puts("{0} ".format(message), newline=False)
    else:
        message = "{0}: ".format(message)

    while True:
        if characters:
            ret_val = getch()

            if default is not None and ret_val in (chr(CR), chr(LF)):
                puts()
                ret_val = default
                break
            if ret_val in characters.lower() or ret_val in characters.upper():
                if echo:
                    puts(ret_val)
                else:
                    puts()

                if ret_val not in characters:
                    ret_val = ret_val.swapcase()

                break
            elif isctrl(ret_val) and ctrl(ret_val) in (chr(ETX), chr(EOT)):

def reader():
    range0 = 90
    range1 = 90

    move(1, range0)
    move(2, range1)

    while True:
        keypress = getch.getch()
        if keypress == 'j':
            range0 += 10
        elif keypress == 'l':
            range0 += -10
        elif keypress == 'i':
            range1 += -10
        elif keypress == 'k':
            range1 += 10

        elif keypress == 'q':
            break

        if range0 > 180:
            range0 = 180
        elif range0 < 0:
            range0 = 0