def getVportFromPortList(self, portList):
        """
        Description
           Get a list of vports from the specified portList.

        Parameter
           portList: <list>: Format: [[ixChassisIp, cardNumber1, portNumber1], [ixChassisIp, cardNumber1, portNumber2]]
    
        Return
           A list of vports.
           [] if vportList is empty.
        """
        vportList = []
        for eachPort in portList:
            chassisIp = eachPort[0]
            card = eachPort[1]
            portNum = eachPort[2]
            port = chassisIp+':'+card+':'+portNum
            # {'href': '/api/v1/sessions/1/ixnetwork/',
            # 'vport': [{'id': 2, 'href': '/api/v1/sessions/1/ixnetwork/vport/2', 'assignedTo': '10.10.10.8:1:2'}]}
            queryData = {"from": "/",
                         "nodes": [{"node": "vport", "properties": ["assignedTo"],
                                    "where": [{"property": "assignedTo", "regex": port}]
                                }]}
            
            queryResponse = self.ixnObj.query(data=queryData, silentMode=False)
            vport = queryResponse.json()['result'][0]['vport']
            if vport == []:
                raise IxNetRestApiException('getVportFromPortList error: The port has no vport and not assigned. Check for port typo: {0}'.format(port))

            if vport:
                # Appending vportList: ['/api/v1/sessions/1/ixnetwork/vport/1', '/api/v1/sessions/1/ixnetwork/vport/2']
                vportList.append(vport[0]['href'])
        return vportList