cutplane.cutter.outputs[0].points.to_array()

PtsCoord = cutplane.cutter.outputs[0].points.to_array()

PolyAndTriIDs = cutplane.cutter.outputs[0].polys.to_array()

jj=0
  while (jj < PolyAndTriIDs.shape[0]):
    if PolyAndTriIDs[jj] == 3:  # triangles

      x1,y1,z1 = PtsCoord[PolyAndTriIDs[jj+1],:]
      x2,y2,z2 = PtsCoord[PolyAndTriIDs[jj+2],:]
      x3,y3,z3 = PtsCoord[PolyAndTriIDs[jj+3],:]
      jj=jj+4

    else: # quadrilateral
      x1,y1,z1 = PtsCoord[PolyAndTriIDs[jj+1],:]
      x2,y2,z2 = PtsCoord[PolyAndTriIDs[jj+2],:]
      x3,y3,z3 = PtsCoord[PolyAndTriIDs[jj+3],:]
      x4,y4,z4 = PtsCoord[PolyAndTriIDs[jj+4],:]
      jj=jj+5