mesh.Tetrahedron()
mesh.Compute()
# get volumes with aspect ratio < 2.0
-filter = smesh.GetFilter(smesh.VOLUME, smesh.FT_AspectRatio3D, smesh.FT_LessThan, 2.0)
+filter = smesh.GetFilter(SMESH.VOLUME, SMESH.FT_AspectRatio3D, SMESH.FT_LessThan, 2.0)
ids = mesh.GetIdsFromFilter(filter)
-print "Number of volumes with aspect ratio < 2.0:", len(ids)
+print("Number of volumes with aspect ratio < 2.0:", len(ids))