I got the normals vertex with:
cmds.select( ** my vertex **, r=True )
resultNormalVertex=cmds.polyNormalPerVertex( query=True, xyz=True )
Result -> [0.9876886606216431, 0.0, -0.15643233060836792] which I guess is a vector.
I create a locator at the same vertex position, but would like also to have a correct orientation based on the vertex normals.
What would be the right python command for that ?