def getTopologyObjAndDeviceGroupObjByPortName(self, portName):
        """
        Description
            Search each Topology Group vport for the portName.
            If found, return the topology object and a list of 
            all its device groups and inner device group within a device group.

        Parameter
            portName: <str>: The port name that you configured for the physical port.

        Returns
            None: If no portName found in any Topology Group.

            Topology object + Device Group list
            Ex 1: ['/api/v1/sessions/1/ixnetwork/topology/2', ['/api/v1/sessions/1/ixnetwork/topology/2/deviceGroup/1']]
            Ex 2: ('/api/v1/sessions/1/ixnetwork/topology/1', ['/api/v1/sessions/1/ixnetwork/topology/1/deviceGroup/1', 
                                                               '/api/v1/sessions/1/ixnetwork/topology/1/deviceGroup/1/deviceGroup/3'])
        """
        response = self.ixnObj.get(self.ixnObj.sessionUrl + '/topology')
        for eachTopology in response.json():
            topologyObj = eachTopology['links'][0]['href']
            vportList = eachTopology['vports']
            response = self.ixnObj.get(self.ixnObj.httpHeader + topologyObj + '/deviceGroup')

            deviceGroupList = []
            for eachDeviceGroup in response.json():
                deviceGroupObj = eachDeviceGroup['links'][0]['href']
                deviceGroupList.append(deviceGroupObj)

                # Verify if there are additional device groups within a device group.
                response = self.ixnObj.get(self.ixnObj.httpHeader + deviceGroupObj + '/deviceGroup')
                if response.json():
                    for response in response.json():
                        deviceGroupList.append(response['links'][0]['href'])
                
            for eachVport in vportList:
                response = self.ixnObj.get(self.ixnObj.httpHeader+eachVport)
                vportName = response.json()['name']
                if portName == vportName:
                    return topologyObj, deviceGroupList