--- /dev/null
+# Intersection of groups
+
+from mechanic import *
+
+# Criterion : AREA > 20
+aFilter = smesh_builder.GetFilter(SMESH.FACE, SMESH.FT_Area, SMESH.FT_MoreThan, 20.)
+
+anIds = mesh.GetIdsFromFilter(aFilter)
+
+print("Criterion: Area > 20, Nb = ", len(anIds))
+
+# create a group by adding elements with area > 20
+aGroup1 = mesh.CreateEmptyGroup(SMESH.FACE, "Area > 20")
+aGroup1.Add(anIds)
+
+# Criterion : AREA < 60
+aFilter = smesh_builder.GetFilter(SMESH.FACE, SMESH.FT_Area, SMESH.FT_LessThan, 60.)
+
+anIds = mesh.GetIdsFromFilter(aFilter)
+
+print("Criterion: Area < 60, Nb = ", len(anIds))
+
+# create a group by adding elements with area < 60
+aGroup2 = mesh.CreateEmptyGroup(SMESH.FACE, "Area < 60")
+aGroup2.Add(anIds)
+
+# create an intersection of groups : 20 < area < 60
+aGroup3 = mesh.IntersectListOfGroups([aGroup1, aGroup2], "20 < Area < 60")
+print("Criterion: 20 < Area < 60, Nb = ", len(aGroup3.GetListOfID()))
+# Please note that also there is IntersectGroups() method which works with two groups only
+
