def test_feed_forward(self) :
layer0 = Layer(0, 'input')
layer0.add_nodes(2, 'input')
layer0.set_activation_type('sigmoid')
layer1 = Layer(1, 'hidden')
layer1.add_nodes(1, 'hidden')
inode1 = layer0.nodes[0]
inode2 = layer0.nodes[1]
inode1.set_value(.25)
inode2.set_value(.5)
node = layer1.nodes[0]
node.add_input_connection(
Connection(inode1, node, .25))
node.add_input_connection(
Connection(inode2, node, .5))
layer1.feed_forward()
self.assertAlmostEqual(
sigmoid(.25) * .25 + sigmoid(.5) * .5, node.get_value())
def test_set_activation_type(self):
layer = Layer(1, 'hidden')
layer.add_nodes(1, 'hidden')
self.assertEqual('sigmoid', layer.nodes[0].get_activation_type())
layer.set_activation_type('linear')
self.assertEqual('linear', layer.nodes[0].get_activation_type())
self.failUnlessRaises(ValueError, layer.set_activation_type, 'fail')
def test_set_activation_type(self):
layer = Layer(1, 'hidden')
layer.add_nodes(1, 'hidden')
self.assertEqual('sigmoid', layer.nodes[0].get_activation_type())
layer.set_activation_type('linear')
self.assertEqual('linear', layer.nodes[0].get_activation_type())
self.failUnlessRaises(
ValueError,
layer.set_activation_type, 'fail')
def test_activations(self):
layer = Layer(1, 'hidden')
layer.add_nodes(2, 'hidden')
layer.set_activation_type('linear')
layer.nodes[0].set_value(.2)
layer.nodes[1].set_value(.3)
activations = layer.activations()
self.assertEqual(True, isinstance(activations, list))
self.assertEqual(.2, activations[0])
self.assertEqual(.3, activations[1])
