Python 字符串和16进制的相互转换

    def str_to_hex(self,s):
        # 文本转16进制 
        return ' '.join([hex(ord(c)).replace('0x', '') for c in s])

    def hex_to_str(self,s):
        #16进制转为文本
        return ''.join([chr(i) for i in [int(b, 16) for b in s.split(' ')]])