from SMESH_mechanic import *
# create group of edges
all_edges = mesh.GetElementsByType(SMESH.EDGE)
-grp = mesh.MakeGroupByIds("edges group", SMESH.EDGE, all_edges[:len(all_edges)/4])
+grp = mesh.MakeGroupByIds("edges group", SMESH.EDGE, all_edges[:len(all_edges) // 4])
import SALOMEDS
c = SALOMEDS.Color(0.1, 0.5, 1.0)
grp.SetColor(c)