How to extract all node ids of a named selection via Mechanical scripting?

How to extract all node ids of a named selection via scripting, irrespective of whether it has geometric entities (faces for example) or nodes?

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Rohith Patchigolla

Here is an example code which takes the name of the named selection (please make sure the name is unique and collects all the node ids into a list.

myNS = ExtAPI.DataModel.GetObjectsByName("test_ns")[0]
allNodeIds = []
geomIds = myNS.Location.Ids
Mesh = ExtAPI.DataModel.MeshDataByName("Global")

if myNS.Location.SelectionType == SelectionTypeEnum.GeometryEntities:
    for geomId in geomIds:
        mR = Mesh.MeshRegionById(geomId)
        nodeIds = mR.NodeIds
        allNodeIds.extend(nodeIds)

else:
    allNodeIds = myNS.Location.Ids

allNodeIds = list(set(allNodeIds))
print(len(allNodeIds))

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