def setIV(self, IV):
        _baseDes.setIV(self, IV)
        for key in (self.__key1, self.__key2, self.__key3):
            key.setIV(IV)
Will set the Initial Value, used in conjunction with CBC mode
dataset/ETHPy150Open mrknow/filmkodi/plugin.video.mrknow/lib/utils/pyDes.py/triple_des.setIV