def draw_graph(graph):
gap_size = 0.25
p = canoepaddle.Pen()
p.stroke_mode(0.1, 'black')
for a, b in graph_edges(graph):
gap = vec.norm(vec.vfrom(a, b), gap_size)
p.move_to(vec.add(a, gap))
p.line_to(vec.sub(b, gap))
return p.paper
def test(target_edges):
assert_equal(sorted(graph_edges(graph)), target_edges)
