Maya 3D Surface Control Point Getter Py

from maya.OpenMaya import *

def outputSurfacePoints(obj):
    fn = MFnNurbsSurface(obj)
    vts = MPointArray()
    fn.getCVs(vts)
    print "NumCVsU:"
    print fn.numCVsInU()
    print "NumCVsV:"
    print fn.numCVsInV()
    for i in range(0, vts.length()):
        print str(vts[i].x) + " " + str(vts[i].y) + " " + str(vts[i].z)


it = MItDag(MItDag.kDepthFirst, MFn.kNurbsSurface)
while not it.isDone():
    fn = MFnNurbsSurface(it.item())
    if not fn.isIntermediateObject():
        print "Object Name: " + fn.name()
        outputSurfacePoints(it.item())
    it.next()