def testIO():
f = open('tinyG.txt', 'r')
tinyG = list(f)
tinyG = map(lambda x: x.strip(), tinyG)
G = Arbitrage.WgtGraph()
for line in tinyG:
line = line.split()
G.addEdge(arbitrage.DirectedEdge(line[0], line[1], float(line[2])))
print G
res = Arbitrage.WgtDirectedCycle(G)
for edge in res.cycle():
print edge
