vertices2 = tuple('ijk')
edges = tuple(itertools.combinations(vertices, 2))
edges2 = tuple(itertools.combinations(vertices2, 2))
- line_edges = zip(vertices[1:], vertices[:-1])
+ line_edges = list(zip(vertices[1:], vertices[:-1]))
ring_edges = line_edges + [(vertices[0], vertices[-1])]
tree = make_tree(vertices)