# create mesh
from SMESH_mechanic import *
# get all free faces
-filter = smesh.GetFilter(smesh.FACE, smesh.FT_FreeFaces)
+filter = smesh.GetFilter(SMESH.FACE, SMESH.FT_FreeFaces)
ids = mesh.GetIdsFromFilter(filter)
-print "Number of free faces:", len(ids)
+print("Number of free faces:", len(ids))