s = "FC0A08202302270924297450000100"

def calculate_crc(cmdString):
    CRCCode = 0
    try:
        # 将字符串拆分成为16进制字节数据然后两位两位进行异或校验
        for i in range(1, len(cmdString) // 2):
            cmdHex = cmdString[i * 2: i * 2 + 2]
            if i == 1:
                cmdPrvHex = cmdString[(i - 1) * 2: i * 2]
                CRCCode = int(cmdPrvHex, 16) ^ int(cmdHex, 16)
            else:
                CRCCode = CRCCode ^ int(cmdHex, 16)
    except Exception as ex:
        pass
    return hex(CRCCode)[2:].upper().zfill(2) # 返回16进制校验码


print(s + calculate_crc(s))