def SetUnplayed(self):
        # Note. Due to a bug in Skype (tested using 3.8.0.115) the reply from
        # [ALTER VOICEMAIL <id> SETUNPLAYED] is [ALTER VOICEMAIL <id> DELETE]
        # causing the _Alter method to fail. Therefore we have to use a direct
        # _DoCommand instead. For the event of this being fixed, we don't
        # check for the "SETUNPLAYED"/"DELETE" part of the response.
        
        #self._Alter('SETUNPLAYED')
        self._Owner._DoCommand('ALTER VOICEMAIL %d SETUNPLAYED' % self.Id,
                               'ALTER VOICEMAIL %d' % self.Id)
Changes the status of a voicemail from played to unplayed.
dataset/ETHPy150Open Skype4Py/Skype4Py/Skype4Py/voicemail.py/Voicemail.SetUnplayed