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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def this_boot(self, bootid=None):
 """Add match for _BOOT_ID for current boot or the specified boot ID. If specified, bootid should be either a UUID or a 32 digit hex number. Equivalent to add_match(_BOOT_ID='bootid'). """

        if bootid is None:
            bootid = _id128.get_boot().hex
        else:
            bootid = getattr(bootid, 'hex', bootid)
        self.add_match(_BOOT_ID=bootid)