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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 vdp_vlan_change_cb(self, port_uuid, lvid, vdp_vlan, fail_reason):
 """Callback function for updating the VDP VLAN in DB. """

        LOG.info("Vlan change CB lvid %(lvid)s VDP %(vdp)s",
                 {'lvid': lvid, 'vdp': vdp_vlan})
        self.update_vm_result(port_uuid, constants.RESULT_SUCCESS,
                              lvid=lvid, vdp_vlan=vdp_vlan,
                              fail_reason=fail_reason)