def test_addCheapestCycle(self):
n = 10
graph = WeightedGraph()
for i in range(n):
graph.addVertex(i)
addCheapestCycle(graph, 1)
self.assertTrue(all(e[2] == 1 for e in graph))
def test_get_links_tiny(self):
graph = WeightedGraph()
graph.add_direct_link(0, 1, 50)
graph.add_direct_link(1, 2, 34)
graph.add_direct_link(1, 3, 42)
graph.add_direct_link(4, 1, 24)
links = sorted(graph.get_links(1))
self.assertEqual(links, [0, 2, 3, 4])
self.dist = dist
def display(self):
print "Shortest Distance :", self.dist[self.dest]
print "Shortest Path:"
print self.src,
for i in self.path:
if i != -1:
print "-->",
print i,
if __name__ == '__main__':
V = 6
wg = WeightedGraph(V)
node = Node(0, 1, 2)
wg.addEdge(node)
node = Node(0, 2, 4)
wg.addEdge(node)
node = Node(1, 2, 1)
wg.addEdge(node)
node = Node(1, 3, 4)
wg.addEdge(node)
node = Node(1, 4, 2)
wg.addEdge(node)
node = Node(2, 4, 3)
wg.addEdge(node)
node = Node(3, 5, 2)
wg.addEdge(node)
node = Node(4, 3, 3)
if args['n'] is None and args['i'] is None:
parser.print_help()
exit(1)
seed = args['s']
vertexCount = 0
if args['n']:
vertexCount = args['n']
graph = genGraph(vertexCount,
costMedian=10,
costDeviation=5,
seed=seed)
if args['i']:
graph = Graph.load(args['i'])
vertexCount = len(graph.vertices())
setSeed(seed)
generations = args['g']
eliteSize = args['e']
if eliteSize is None:
eliteSize = int(vertexCount * 0.3)
mutationRate = args['m']
if mutationRate is None:
mutationRate = 10.0 / vertexCount
startTime = time()
bestPath, progress, lastGeneration = evolutionaryAlgorithm(
graph, generations, eliteSize, mutationRate)
for edge in self.graph:
if self.checkCycle(uf,edge):
self.mst.append(edge)
uf.union(edge.src,edge.dest)
def display(self):
print "Kruskal's Algorithm: "
print " U | V | cost |"
print "-----------+------------+--------------+"
for node in self.mst:
print " ",node.src," | ",node.dest," | ",node.cost," |"
if __name__=='__main__':
V = 6
g = WeightedGraph(V)
node = Node(0,1,6)
g.addEdge(node)
node = Node(0,2,1)
g.addEdge(node)
node = Node(0,3,5)
g.addEdge(node)
node = Node(1,0,6)
g.addEdge(node)
node = Node(1,2,5)
g.addEdge(node)
node = Node(1,4,3)
g.addEdge(node)
node = Node(2,1,5)
g.addEdge(node)
node = Node(2,3,5)
def setUp(self):
self.g = WeightedGraph()
class GraphTest(unittest.TestCase):
def setUp(self):
self.g = WeightedGraph()
def test_addVertex(self):
self.g.addVertex('a')
self.g.addVertex('a')
self.g.addVertex('b')
self.assertEqual(2, len(self.g.vertices()))
def test_addEdge(self):
self.g.addEdge('a', 'b', 2)
self.g.addEdge('a', 'c', 3)
self.g.addEdge('a', 'b', 5)
self.assertEqual(3, len(self.g.vertices()))
def test_iter(self):
self.g.addEdge('a', 'd', 2)
self.g.addEdge('b', 'c', 3)
self.g.addEdge('a', 'b', 5)
self.g.addEdge('a', 'b', 3)
self.assertTrue(('a', 'd', 2) in self.g)
self.assertTrue(('b', 'c', 3) in self.g)
self.assertFalse(('a', 'b', 3) in self.g)
self.assertEqual(3, len(list(self.g)) // 2)
def test_getItem(self):
self.g.addEdge('a', 'b', 1000)
self.g.addEdge('x', 'y', 2)
self.assertEqual(1000, self.g[('a', 'b')])
self.assertEqual(2, self.g['x', 'y'])
self.assertEqual(None, self.g['a', 'x'])
def test_MST_small(self):
graph = WeightedGraph()
graph.add_direct_link(0, 1, 2)
graph.add_direct_link(2, 1, 3)
graph.add_direct_link(2, 5, 4)
graph.add_direct_link(2, 4, 1)
graph.add_direct_link(2, 6, 5)
graph.add_direct_link(3, 7, 13)
graph.add_direct_link(4, 7, 6)
graph.add_direct_link(5, 8, 7)
graph.add_direct_link(8, 9, 8)
graph.add_direct_link(8, 10, 9)
graph.add_direct_link(10, 11, 10)
graph.add_direct_link(12, 11, 11)
graph.add_direct_link(13, 11, 12)
graph.add_direct_link(0, 11, 54)
graph.add_direct_link(0, 12, 64)
graph.add_direct_link(0, 7, 42)
graph.add_direct_link(0, 2, 6)
graph.add_direct_link(1, 3, 63)
graph.add_direct_link(1, 9, 99)
graph.add_direct_link(5, 6, 42)
graph.add_direct_link(5, 9, 87)
graph.add_direct_link(8, 12, 46)
mst = graph.min_tree()
self.assertEqual(sorted(mst.get_links(0)), [1])
self.assertEqual(sorted(mst.get_links(1)), [0, 2])
self.assertEqual(sorted(mst.get_links(2)), [1, 4, 5, 6])
self.assertEqual(sorted(mst.get_links(3)), [7])
self.assertEqual(sorted(mst.get_links(4)), [2, 7])
self.assertEqual(sorted(mst.get_links(5)), [2, 8])
self.assertEqual(sorted(mst.get_links(6)), [2])
self.assertEqual(sorted(mst.get_links(7)), [3, 4])
self.assertEqual(sorted(mst.get_links(8)), [5, 9, 10])
self.assertEqual(sorted(mst.get_links(9)), [8])
self.assertEqual(sorted(mst.get_links(10)), [8, 11])
self.assertEqual(sorted(mst.get_links(11)), [10, 12, 13])
self.assertEqual(sorted(mst.get_links(12)), [11])
self.assertEqual(sorted(mst.get_links(13)), [11])
def test_MST_tiny(self):
graph = WeightedGraph()
graph.add_direct_link(1, 3, 15)
graph.add_direct_link(1, 2, 1)
graph.add_direct_link(1, 4, 10)
graph.add_direct_link(2, 4, 15)
graph.add_direct_link(2, 3, 16)
graph.add_direct_link(2, 0, 4)
graph.add_direct_link(3, 0, 2)
graph.add_direct_link(4, 0, 3)
mst = graph.min_tree()
self.assertEqual(sorted(mst.get_links(0)), [2, 3, 4])
self.assertEqual(sorted(mst.get_links(1)), [2])
self.assertEqual(sorted(mst.get_links(2)), [0, 1])
self.assertEqual(sorted(mst.get_links(3)), [0])
self.assertEqual(sorted(mst.get_links(4)), [0])
def test_get_links_small(self):
graph = WeightedGraph()
graph.add_direct_link(0, 5, 1)
graph.add_direct_link(0, 1, 1)
graph.add_direct_link(0, 2, 1)
graph.add_direct_link(1, 5, 1)
graph.add_direct_link(2, 5, 1)
graph.add_direct_link(2, 3, 1)
graph.add_direct_link(3, 4, 1)
graph.add_direct_link(3, 5, 1)
graph.add_direct_link(5, 6, 1)
graph.add_direct_link(5, 7, 1)
graph.add_direct_link(6, 9, 1)
graph.add_direct_link(7, 11, 1)
graph.add_direct_link(8, 9, 1)
graph.add_direct_link(9, 10, 1)
graph.add_direct_link(9, 11, 1)
links = sorted(graph.get_links(1))
self.assertEqual(links, [0, 5])
links = sorted(graph.get_links(3))
self.assertEqual(links, [2, 4, 5])
links = sorted(graph.get_links(5))
self.assertEqual(links, [0, 1, 2, 3, 6, 7])
links = sorted(graph.get_links(11))
self.assertEqual(links, [7, 9])
class AiUtilsTest(unittest.TestCase):
def setUp(self):
self.g = WeightedGraph()
def test_calcDistance(self):
self.g.addEdge('a', 'b', 12)
self.g.addEdge('a', 'c', 3)
self.g.addEdge('b', 'd', 5)
self.g.addEdge('b', 'c', 6)
self.g.addEdge('b', 'd', 4)
path = random.sample(self.g.vertices(), len(self.g.vertices()))
pathDist = AiUtils.calcDistance(self.g, path)
self.assertEqual(-1, pathDist)
self.g.addEdge('c', 'd', 7)
self.g.addEdge('d', 'a', 8)
pathDist = AiUtils.calcDistance(self.g, path)
self.assertTrue(pathDist > 0)
def test_calcFitness(self):
self.g.addEdge('a', 'b', 10)
self.g.addEdge('c', 'a', 3)
path = AiUtils.genPath(self.g.vertices())
fitness = AiUtils.calcFitness(self.g, path)
self.assertEqual(-1, fitness)
self.g.addEdge('b', 'c', 5)
path = AiUtils.genPath(self.g.vertices())
fitness = AiUtils.calcFitness(self.g, path)
self.assertTrue(fitness == 1.0/18)
def test_rankPaths(self):
self.g = genGraph(100, 0.9)
population = AiUtils.initPopulation(50, self.g.vertices())
ranked = AiUtils.rankPaths(self.g, population)
self.assertEqual(50, len(ranked))
for _, fitness in ranked:
self.assertTrue(fitness > 0 or fitness == -1)
def test_selection(self):
self.g = genGraph(100, 1)
population = AiUtils.initPopulation(100, self.g.vertices())
ranked = AiUtils.rankPaths(self.g, population)
with self.assertRaises(Exception) as context:
AiUtils.selection(ranked, 30, selectionSize=1.1)
self.assertTrue('Selection size must be in [0 .. 1]' in context.exception)
def test_breed(self):
parent1 = list(range(10))
parent2 = parent1[:]
random.shuffle(parent2)
self.assertTrue(len(parent1) == len(parent2))
child1, child2 = AiUtils.breed(parent1, parent2)
self.assertTrue(len(child1) == len(child2))
self.assertTrue(len(child1) == len(parent1))
self.assertTrue(len(child1) == len(set(child1)))
self.assertTrue(len(child2) == len(set(child2)))
def test_mutate(self):
self.g = genGraph(10, 1)
population = AiUtils.initPopulation(100, self.g.vertices())
mutated = AiUtils.mutatePopulation(population, 1, 1)
self.assertTrue(all(x not in population for x in mutated))
