>>> import castell  

>>> lhabs = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
>>> lportes = [(0, 12), (0, 4), (0, 13), (1, 3), (1, 13), (3, 13), (4, 13), (7, 14)]
>>> c = castell.habitacions(lhabs, lportes)
>>> castell.subcastells(c)
9
>>> mes_portes = [(5, 6), (6, 9), (6, 10), (7, 8), (11, 2)]
>>> c.add_edges_from(mes_portes)
>>> castell.subcastells(c)
4