class DateTransfer():
    # ==================================================================================================================
    # 二進位制、十進位制、十六進位制、數字、字串相互轉換
    # 將16進位制字串轉化為對應的數字
    def str2hex(self, s):
        data = 0
        su = s.upper()
        for _ in su:
            data = data << 4
            if _ <= '9':
                data = data + ord(_) - ord('0')
            elif 'A' <= _ <= 'G':
                data = data + ord(_) - ord('A') + 10
        return data
    # 將2進位制字串轉化為對應的數字
    def str2bin(self, s):
        data = 0
        for _ in s:
            data = data << 1
            data = data + ord(_) - ord('0')
        return data
    # 將十六進位制字串轉化為二進位制字串
    def hex2bin(self, s):
        data = self.str2hex(s)
        strbin = bin(data)[2:]
        if len(strbin) == 8:
            pass
        else:
            strbin = '0' * (8 - len(strbin)) + strbin
        return strbin
    # 將二進位制字串轉化未十六進位制字串
    def bin2hex(self, b):
        orgbin = '0b' + b
        binstr = eval(orgbin)
        hexstr = str(hex(binstr))[2:]
        return hexstr