def trans_list_to_str(data: list) -> str:
    """ 标准串口字符串表示 """
    func_trans = lambda x: ('00' + hex(x % 256)[2:])[-2:].upper()
    return " ".join(map(func_trans, data))

def trans_str_to_list(data: str) -> list:
    """ 标准串口字符串转换列表 """
    func_trans = lambda x: int(x, 16)
    return list(map(func_trans, data.strip().split(" ")))


def display_hex(data, len) -> str:
    """ Hex字符表示 """
    data  %= 2 ** (4 * len)
    result = "0" * len + hex(data)[2:]
    return "0x" + result[-len:].upper()