def test_get_variables_with_several_childs(self):
root_node = BayesNetNode("root")
child1 = BayesNetNode("child1")
child2 = BayesNetNode("child2")
child3 = BayesNetNode("child3")
child1.influenced_by(root_node)
child2.influenced_by(root_node)
child3.influenced_by(root_node)
bn = BayesNet([root_node])
vars = bn.get_variables()
self.assertSameElements(["root", "child1", "child2", "child3"], vars)
def test_get_variables_with_several_childs(self):
root_node = BayesNetNode("root")
child1 = BayesNetNode("child1")
child2 = BayesNetNode("child2")
child3 = BayesNetNode("child3")
child1.influenced_by(root_node)
child2.influenced_by(root_node)
child3.influenced_by(root_node)
bn = BayesNet([root_node])
vars = bn.get_variables()
self.assertSameElements(["root", "child1", "child2", "child3"], vars)
def create_burglary_network():
burglary = BayesNetNode("Burglary")
earthQuake = BayesNetNode("EarthQuake")
alarm = BayesNetNode("Alarm")
johnCalls = BayesNetNode("JohnCalls")
maryCalls = BayesNetNode("MaryCalls")
alarm.influenced_by(burglary, earthQuake)
johnCalls.influenced_by(alarm)
maryCalls.influenced_by(alarm)
burglary.set_probablity(0.001, [True])
earthQuake.set_probablity(0.002, [True])
alarm.set_probablity(0.95, [True, True])
alarm.set_probablity(0.94, [True, False])
alarm.set_probablity(0.29, [False, True])
alarm.set_probablity(0.001, [False, False])
johnCalls.set_probablity(0.9, [True])
johnCalls.set_probablity(0.05, [False])
maryCalls.set_probablity(0.7, [True])
maryCalls.set_probablity(0.01, [False])
return BayesNet((burglary, earthQuake))
def _create_wet_grass_network(self):
cloudy_node = BayesNetNode("Cloudy")
sprinkler_node = BayesNetNode("Sprinkler")
rain_node = BayesNetNode("Rain")
wet_grass_node = BayesNetNode("WetGrass")
sprinkler_node.influenced_by(cloudy_node)
rain_node.influenced_by(cloudy_node)
wet_grass_node.influenced_by(rain_node, sprinkler_node)
cloudy_node.set_probablity(0.5, [True])
sprinkler_node.set_probablity(0.1, [True])
sprinkler_node.set_probablity(0.5, [False])
rain_node.set_probablity(0.8, [True])
rain_node.set_probablity(0.2, [False])
wet_grass_node.set_probablity(0.99, [True, True])
wet_grass_node.set_probablity(0.9, [True, False])
wet_grass_node.set_probablity(0.9, [False, True])
wet_grass_node.set_probablity(0, [False, False])
return BayesNet([cloudy_node])
def test_get_root_variable(self):
root_node = BayesNetNode("root")
bn = BayesNet([root_node])
vars = bn.get_variables()
self.assertSameElements(["root"], vars)
def test_get_root_variable(self):
root_node = BayesNetNode("root")
bn = BayesNet([root_node])
vars = bn.get_variables()
self.assertSameElements(["root"], vars)