+# Free nodes
+
+# create mesh
+from mechanic import *
+
+# add node
+mesh.AddNode(0,0,0)
+
+# get all free nodes
+filter = smesh_builder.GetFilter(SMESH.NODE, SMESH.FT_FreeNodes)
+ids = mesh.GetIdsFromFilter(filter)
+print("Number of free nodes:", len(ids))
