>>> 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)
>>> list(c.nodes)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
>>> c.number_of_edges()
8
>>> c.has_edge(1, 3)
True
>>> c.has_edge(3, 4)
False