def test_foward():
weight1 = np.array([[0.3, 0.8, 0.7], [0.5, 0.6, 0.2]])
weight2 = np.array([[0.1, 0.4, 0.9], [0.5, 0.3, 0.6]])
first = np.array([[0.0, 0.0]])
target = np.array([[0.0, 0.0]])
testinput = np.array([0.0, 0.0])
neural = spl.MLP(2, 1).fit(first, target)
neural._weights[0] = weight1
neural._weights[1] = weight2
testtarget = np.array([0.33, 0.425]).reshape(2, 1)
tst.assert_almost_equal(neural._forward(testinput), testtarget, decimal=2)
def test_constructor(xor_data):
randomlayers = np.random.randint(1, 6, 5)
data, target = xor_data
def test_numpy(expected, value):
expected.insert(0, np.zeros(shape=(2, 1)))
expected.append(np.zeros(shape=(2, 1)))
for exp, t in zip(expected, value):
assert exp.shape == t.shape
# Test constructor with values for layers
neural1 = spl.MLP(9, 5).fit(data, target)
test_numpy([np.zeros(shape=(9, 1)) for _ in range(5)], neural1._network)
# Test constructor for iterable
neural2 = spl.MLP(randomlayers).fit(data, target)
test_numpy([np.zeros(shape=(value, 1)) for value in randomlayers],
neural2._network)
# Test constructor with integer
neural3 = spl.MLP(9).fit(data, target)
test_numpy([np.zeros(shape=(9, 1)) for _ in range(9)], neural3._network)
# Test constructor with package
neural4 = spl.MLP(*randomlayers).fit(data, target)
test_numpy([np.zeros(shape=(value, 1)) for value in randomlayers],
neural4._network)
# Testing wrong constructors
with pytest.raises(TypeError):
wronglayers = np.random.rand(3)
print("Shape wronglayers: {0}".format(wronglayers.shape))
# Test constructor with float
spl.MLP(3.7)
# Test constructor with string
spl.MLP("marcelinho")
# Test constructor with random type
spl.MLP(int)
# Test constructor with array of floats
spl.MLP(wronglayers)
# Test constructor with sequence of floats
spl.MLP(*wronglayers)
def test_back():
weight1 = np.array([[0.3, 0.8, 0.7], [0.5, 0.6, 0.2]])
weight2 = np.array([[0.1, 0.4, 0.9], [0.5, 0.3, 0.6]])
first = np.array([[0.0, 0.0]])
target = np.array([[0.0, 0.0]])
testinput = np.array([0.0, 0.0])
expected = np.array([0.0, 0.0])
# Results from classroom assignment
nweights = [
np.array([[0.3, 0.8, 0.71], [0.5, 0.6, 0.21]]),
np.array([[0.08, 0.38, 0.93], [0.48, 0.28, 0.65]])
]
neural = spl.MLP(2, 1).fit(first, target)
neural._weights[0] = weight1
neural._weights[1] = weight2
neural._forward(testinput)
neural._backprop(expected)
for old, new in zip(neural._weights, nweights):
tst.assert_almost_equal(old, new, decimal=2)
def test_predict(xor_data):
data, target = xor_data
neural = spl.MLP(2, 1).fit(data, target)
neural.predict(np.array([[1, 1]]))
def test_fitting(xor_data):
data, target = xor_data
ml = spl.MLP([2])
ml.fit(data, target)
spl.MLP(2, 1).fit(data, target)
def test_describe(xor_data):
data, target = xor_data
neural = spl.MLP(2, 1).fit(data, target)
neural.describe()