-print "aGroupOnShell type =", aGroupOnShell.GetType()
-print "aGroupOnShell size =", aGroupOnShell.Size()
-print "aGroupOnShell ids :", aGroupOnShell.GetListOfID()
+print("aGroupOnShell type =", aGroupOnShell.GetType())
+print("aGroupOnShell size =", aGroupOnShell.Size())
+print("aGroupOnShell ids :", aGroupOnShell.GetListOfID())