def ex_delete_ptr_record(self, record):
        """
        Delete an existing PTR Record

        :param record: the original :class:`RackspacePTRRecord`
        :rtype: ``bool``
        """
        _check_ptr_extra_fields(record)
        self.connection.set_context({'resource': 'record', 'id': record.id})
        self.connection.async_request(
            action=(record.extra['service_name']) % '/rdns/%s',
            method='DELETE',
            params={'href': record.extra['uri'], 'ip': record.ip},
        )
        return True
dataset/ETHPy150Open apache/libcloud/libcloud/dns/drivers/rackspace.py/RackspaceDNSDriver.ex_delete_ptr_record/swapped operands of `%`