mesh.Tetrahedron()
mesh.Compute()
# get volumes faces with volume > 100
-filter = smesh.GetFilter(smesh.VOLUME, smesh.FT_Volume3D, smesh.FT_MoreThan, 100)
+filter = smesh.GetFilter(SMESH.VOLUME, SMESH.FT_Volume3D, SMESH.FT_MoreThan, 100)
ids = mesh.GetIdsFromFilter(filter)
-print "Number of volumes with volume > 100:", len(ids)
+print("Number of volumes with volume > 100:", len(ids))