def network():
HalfPadConvolution = partial(layers.Convolution, padding='half')
return layers.join(
layers.Input((3, 224, 224)),
HalfPadConvolution((20, 5, 5), name='conv1_1') > layers.Relu(),
HalfPadConvolution((20, 5, 5), name='conv1_2') > layers.Relu(),
layers.MaxPooling((2, 2)),
HalfPadConvolution((60, 5, 5), name='conv2_1') > layers.Relu(),
HalfPadConvolution((60, 5, 5), name='conv2_2') > layers.Relu(),
layers.MaxPooling((2, 2)),
HalfPadConvolution((120, 5, 5), name='conv3_1') > layers.Relu(),
HalfPadConvolution((120, 5, 5), name='conv3_2') > layers.Relu(),
HalfPadConvolution((150, 5, 5), name='conv3_3') > layers.Relu(),
HalfPadConvolution((150, 5, 5), name='conv3_4') > layers.Relu(),
layers.MaxPooling((2, 2)),
HalfPadConvolution((128, 5, 5), name='conv4_1') > layers.Relu(),
HalfPadConvolution((128, 5, 5), name='conv4_2') > layers.Relu(),
HalfPadConvolution((512, 3, 3), name='conv4_3') > layers.Relu(),
HalfPadConvolution((512, 3, 3), name='conv4_4') > layers.Relu(),
layers.MaxPooling((2, 2)),
layers.Reshape(),
layers.Linear(2000, name='dense_1') > layers.Relu(),
layers.Dropout(0.5),
layers.Linear(1000, name='dense_2') > layers.Relu(),
layers.Dropout(0.5),
layers.Linear(1000, name='dense_3') > layers.Softmax(),
)
def test_multi_outputs_propagation(self):
network = layers.join(
layers.Input(4),
layers.parallel(
layers.Linear(2),
layers.Linear(3),
layers.Linear(4),
))
x = asfloat(np.random.random((7, 4)))
out1, out2, out3 = self.eval(network.output(x))
self.assertEqual((7, 2), out1.shape)
self.assertEqual((7, 3), out2.shape)
self.assertEqual((7, 4), out3.shape)
def test_one_to_many_parallel_connection_output(self):
input_connection = layers.Input(4)
parallel_connections = layers.parallel(
layers.Linear(11),
layers.Linear(12),
layers.Linear(13),
)
layers.join(input_connection, parallel_connections)
input_value = asfloat(np.random.random((10, 4)))
actual_output = self.eval(parallel_connections.output(input_value))
self.assertEqual(actual_output[0].shape, (10, 11))
self.assertEqual(actual_output[1].shape, (10, 12))
self.assertEqual(actual_output[2].shape, (10, 13))
def test_invalid_weight_shape(self):
network = layers.join(
layers.Input(5),
layers.Linear(4, weight=np.ones((3, 3))),
)
with self.assertRaisesRegexp(ValueError, "Cannot create variable"):
network.create_variables()
variable = tf.Variable(np.ones((3, 3)), dtype=tf.float32)
network = layers.join(
layers.Input(5),
layers.Linear(4, weight=variable),
)
with self.assertRaisesRegexp(ValueError, "Cannot create variable"):
network.create_variables()
def test_linear_layer_withut_bias(self):
input_layer = layers.Input(10)
output_layer = layers.Linear(2, weight=init.Constant(0.1), bias=None)
connection = input_layer > output_layer
self.assertEqual(output_layer.bias_shape, None)
input_value = asfloat(np.ones((1, 10)))
actual_output = self.eval(connection.output(input_value))
expected_output = np.ones((1, 2))
np.testing.assert_array_almost_equal(expected_output, actual_output)
with self.assertRaises(TypeError):
layers.Linear(2, weight=None)
def test_one_to_many_parallel_network_output(self):
one_to_many = layers.join(
layers.Input(4),
layers.parallel(
layers.Linear(11),
layers.Linear(12),
layers.Linear(13),
),
)
input_value = asfloat(np.random.random((10, 4)))
actual_output = self.eval(one_to_many.output(input_value))
self.assertEqual(actual_output[0].shape, (10, 11))
self.assertEqual(actual_output[1].shape, (10, 12))
self.assertEqual(actual_output[2].shape, (10, 13))
def test_compilation_multiple_inputs(self):
input_matrix = asfloat(np.ones((7, 10)))
expected_output = np.ones((7, 5))
network = layers.join([[
layers.Input(10),
], [
layers.Input(10),
]], layers.Elementwise(),
layers.Linear(5,
weight=init.Constant(0.1),
bias=None))
# Generated input variables
predict = network.compile()
actual_output = predict(input_matrix * 0.7, input_matrix * 0.3)
np.testing.assert_array_almost_equal(actual_output, expected_output)
# Pre-defined input variables
input_variable_1 = T.matrix('x1')
input_variable_2 = T.matrix('x2')
predict = network.compile(input_variable_1, input_variable_2)
actual_output = predict(input_matrix * 0.7, input_matrix * 0.3)
np.testing.assert_array_almost_equal(actual_output, expected_output)
def test_storage_load_dict_invalid_number_of_paramters(self):
network = layers.join(
layers.Input(3),
layers.Relu(4, name='relu'),
layers.Linear(5, name='linear') > layers.Relu(),
layers.Softmax(6, name='softmax'),
)
data = {
'metadata': {}, # avoided for simplicity
'graph': {}, # avoided for simplicity
# Input layer was avoided on purpose
'layers': [{
'name': 'name-1',
'class_name': 'Relu',
'configs': {},
'parameters': {
'weight': {
'trainable': True,
'value': np.ones((3, 4))
},
'bias': {
'trainable': True,
'value': np.ones((4, ))
},
}
}]
}
with self.assertRaises(ParameterLoaderError):
storage.load_dict(network, data, ignore_missing=False)
def test_invalid_input_shape(self):
error_message = ("Input shape expected to have 2 "
"dimensions, got 3 instead. Shape: \(\?, 10, 3\)")
with self.assertRaisesRegexp(LayerConnectionError, error_message):
layers.join(
layers.Input((10, 3)),
layers.Linear(10),
)
def test_many_to_many_parallel_connection_output(self):
connection = layers.parallel(
layers.Input(1) > layers.Linear(11),
layers.Input(2) > layers.Linear(12),
layers.Input(3) > layers.Linear(13),
)
input_value_1 = asfloat(np.random.random((10, 1)))
input_value_2 = asfloat(np.random.random((20, 2)))
input_value_3 = asfloat(np.random.random((30, 3)))
actual_output = self.eval(
connection.output(input_value_1, input_value_2, input_value_3))
self.assertEqual(actual_output[0].shape, (10, 11))
self.assertEqual(actual_output[1].shape, (20, 12))
self.assertEqual(actual_output[2].shape, (30, 13))
def Initialize_Connection(self):
neuronsLayers=self.NeuronsInEveryLayer
activationFsLayers=self.ActivationFunctionInEveryLayer
connectionInit=[layerNeupy.Input(neuronsLayers[0])]
for i in range(1,len(self.NeuronsInEveryLayer)):
if(activationFsLayers[i]=='logsig'):connectionInit.append(layerNeupy.Sigmoid(neuronsLayers[i]))
elif(activationFsLayers[i]=='tansig'):connectionInit.append(layerNeupy.Tanh(neuronsLayers[i]))
else:connectionInit.append(layerNeupy.Linear(neuronsLayers[i]))
return connectionInit
def test_compilation_multiple_outputs(self):
input_matrix = asfloat(np.ones((7, 10)))
expected_output_1 = np.ones((7, 5))
expected_output_2 = np.ones((7, 2))
network = layers.join(
layers.Input(10),
[[layers.Linear(5, weight=init.Constant(0.1), bias=None)],
[layers.Linear(2, weight=init.Constant(0.1), bias=None)]])
predict = network.compile()
actual_output_1, actual_output_2 = predict(input_matrix)
np.testing.assert_array_almost_equal(actual_output_1,
expected_output_1)
np.testing.assert_array_almost_equal(actual_output_2,
expected_output_2)
def test_storage_load_dict_using_wrong_names(self):
connection = layers.join(
layers.Input(3),
layers.Relu(4, name='relu'),
layers.Linear(5, name='linear') > layers.Relu(),
layers.Softmax(6, name='softmax'),
)
storage.load_dict(connection, {
'metadata': {}, # avoided for simplicity
'graph': {}, # avoided for simplicity
# Input layer was avoided on purpose
'layers': [{
'name': 'name-1',
'class_name': 'Relu',
'input_shape': (3,),
'output_shape': (4,),
'configs': {},
'parameters': {
'weight': {'trainable': True, 'value': np.ones((3, 4))},
'bias': {'trainable': True, 'value': np.ones((4,))},
}
}, {
'name': 'name-2',
'class_name': 'Relu',
'input_shape': (4,),
'output_shape': (5,),
'configs': {},
'parameters': {
'weight': {'trainable': True, 'value': np.ones((4, 5))},
'bias': {'trainable': True, 'value': np.ones((5,))},
}
}, {
'name': 'name-3',
'class_name': 'Softmax',
'input_shape': (5,),
'output_shape': (6,),
'configs': {},
'parameters': {
'weight': {'trainable': True, 'value': np.ones((5, 6))},
'bias': {'trainable': True, 'value': np.ones((6,))},
}
}]
}, load_by='order', skip_validation=False)
relu = connection.layer('relu')
self.assertEqual(12, np.sum(self.eval(relu.weight)))
self.assertEqual(4, np.sum(self.eval(relu.bias)))
linear = connection.layer('linear')
self.assertEqual(20, np.sum(self.eval(linear.weight)))
self.assertEqual(5, np.sum(self.eval(linear.bias)))
softmax = connection.layer('softmax')
self.assertEqual(30, np.sum(self.eval(softmax.weight)))
self.assertEqual(6, np.sum(self.eval(softmax.bias)))
def test_linear_layer_withuot_bias(self):
input_layer = layers.Input(10)
output_layer = layers.Linear(2, weight=0.1, bias=None)
network = layers.join(input_layer, output_layer)
input_value = asfloat(np.ones((1, 10)))
actual_output = self.eval(network.output(input_value))
expected_output = np.ones((1, 2))
np.testing.assert_array_almost_equal(expected_output, actual_output)
def build_net(n_input, activation=layers.Sigmoid, sizes=[3, 3]):
net = layers.Input(n_input)
for size in sizes:
net = net > activation(size)
net = net > layers.Linear(1)
conj = neual.ConjugateGradient(connection=net,
step=0.005,
addons=[neual.LinearSearch],
show_epoch=25)
return conj
def initialize(self):
self.network = algorithms.Momentum(
[
layers.Input(20),
layers.Linear(20, weight=init.Uniform(-0.5, 0.5)) ,
layers.LeakyRelu(15, weight=init.Uniform(-0.5, 0.5)),
layers.LeakyRelu(15, weight=init.Uniform(-0.5, 0.5)),
layers.LeakyRelu(12, weight=init.Uniform(-0.5, 0.5)),
layers.Linear(9, weight=init.Uniform(-0.5, 0.5)),
],
error='categorical_crossentropy',
step=0.01,
verbose=False,
shuffle_data=True,
momentum=0.99,
nesterov=True,
)
self.network.architecture()
def test_unknwown_feature_during_weight_init(self):
network = layers.join(
layers.Input(None),
layers.Linear(10, name='linear'),
)
message = ("Cannot create variables for the layer `linear`, "
"because number of input features is unknown. "
"Input shape: \(\?, \?\)")
with self.assertRaisesRegexp(WeightInitializationError, message):
network.create_variables()
with self.assertRaisesRegexp(WeightInitializationError, message):
network.outputs
def test_predict_different_inputs(self):
for bp_algorithm_class in self.bp_algorithms:
network = bp_algorithm_class(
[
layers.Linear(
size=2, bias=np.zeros(1), weight=np.zeros((2, 1))),
layers.Output(1),
],
verbose=False,
)
self.assertInvalidVectorPred(network,
input_vector=np.array([0, 0]),
target=0,
is_feature1d=False)
def test_simple_connection_compilation(self):
input_matrix = asfloat(np.ones((7, 10)))
expected_output = np.ones((7, 5))
network = layers.join(
layers.Input(10),
layers.Linear(5, weight=init.Constant(0.1), bias=None))
# Generated input variables
predict = network.compile()
actual_output = predict(input_matrix)
np.testing.assert_array_almost_equal(actual_output, expected_output)
# Pre-defined input variables
input_variable = T.matrix('x')
predict = network.compile(input_variable)
actual_output = predict(input_matrix)
np.testing.assert_array_almost_equal(actual_output, expected_output)
def model_network(self, algorithm='LevenbergMarquardt', model=None, opt=None):
model = self.decode_model(model)
if model is None:
model = [
[1, 'hidden', 15, 'Linear'],
[2, 'hidden', 10, 'Linear'],
[3, 'output', self.output_classes, 'Elu']
]
# [Input(4), Elu(1)]
# [Input(4), Elu(6), Elu(1)] EP: 100
layer_model = [layers.Input(self.input_features)]
for layer in model:
if layer[3] == 'Linear':
layer_model.append(layers.Linear(layer[2]))
if layer[3] == 'Relu':
layer_model.append(layers.Relu(layer[2]))
if layer[3] == 'Sigmoid':
layer_model.append(layers.Sigmoid(layer[2]))
if layer[3] == 'HardSigmoid':
layer_model.append(layers.HardSigmoid(layer[2]))
if layer[3] == 'Step':
layer_model.append(layers.Step(layer[2]))
if layer[3] == 'Tanh':
layer_model.append(layers.Tanh(layer[2]))
if layer[3] == 'Softplus':
layer_model.append(layers.Softplus(layer[2]))
if layer[3] == 'Softmax':
layer_model.append(layers.Softmax(layer[2]))
if layer[3] == 'Elu':
layer_model.append(layers.Elu(layer[2]))
if layer[3] == 'PRelu':
layer_model.append(layers.PRelu(layer[2]))
if layer[3] == 'LeakyRelu':
layer_model.append(layers.LeakyRelu(layer[2]))
print('Model warstw: ' + str(layer_model))
self.layers = layer_model
self.select_algorithm(algorithm, options=opt)
def go(self):
raw = self.datafile.read().splitlines()
data = self._prepare_data(raw[::2])
target = self._prepare_target(raw[1::2])
print(len(data))
print(len(target))
environment.reproducible()
x_train, x_test, y_train, y_test = train_test_split(data,
target,
train_size=0.85)
print(x_train[0])
connections = [
layers.Input(100),
layers.Linear(200),
layers.Sigmoid(150),
layers.Sigmoid(5),
]
cgnet = algorithms.ConjugateGradient(
connection=connections,
search_method='golden',
show_epoch=25,
verbose=True,
addons=[algorithms.LinearSearch],
)
cgnet.train(x_train, y_train, x_test, y_test, epochs=100)
plots.error_plot(cgnet)
y_predict = cgnet.predict(x_test).round(1)
error = rmsle(y_test, y_predict)
print(error)
with open('lib/net/base_searcher.pickle', 'wb') as f:
pickle.dump(cgnet, f)
def initialize(self):
self.network = algorithms.Momentum(
[
layers.Input(20),
layers.Relu(30, weight=init.Uniform(-1, 1)),
layers.Tanh(40, weight=init.Uniform(-1, 1)),
# layers.Embedding(40, 1),
# layers.GRU(40),
layers.Relu(25, weight=init.Uniform(-1, 1)),
layers.Linear(9, weight=init.Uniform(-1, 1)),
],
error='categorical_crossentropy',
step=0.01,
verbose=False,
shuffle_data=True,
momentum=0.99,
nesterov=True,
)
self.network.architecture()
def vgg19():
"""
VGG19 network architecture with random parameters. Parameters
can be loaded using ``neupy.storage`` module.
Originally VGG19 was built in order to solve image classification
problem. It was used in the ImageNet competition. The goal of the
competition is to build a model that classifies image into one of
the 1,000 categories. Categories include animals, objects, transports
and so on.
VGG19 has roughly 143 million parameters.
Examples
--------
>>> from neupy import architectures
>>> vgg19 = architectures.vgg19()
>>> vgg19
(3, 224, 224) -> [... 44 layers ...] -> 1000
>>>
>>> from neupy import algorithms
>>> network = algorithms.Momentum(vgg19)
See Also
--------
:architecture:`vgg16` : VGG16 network
:architecture:`squeezenet` : SqueezeNet network
:architecture:`alexnet` : AlexNet network
:architecture:`resnet50` : ResNet50 network
References
----------
Very Deep Convolutional Networks for Large-Scale Image Recognition.
https://arxiv.org/abs/1409.1556
"""
HalfPadConvolution = partial(layers.Convolution, padding='half')
return layers.join(
layers.Input((3, 224, 224)),
HalfPadConvolution((64, 3, 3), name='conv1_1') > layers.Relu(),
HalfPadConvolution((64, 3, 3), name='conv1_2') > layers.Relu(),
layers.MaxPooling((2, 2)),
HalfPadConvolution((128, 3, 3), name='conv2_1') > layers.Relu(),
HalfPadConvolution((128, 3, 3), name='conv2_2') > layers.Relu(),
layers.MaxPooling((2, 2)),
HalfPadConvolution((256, 3, 3), name='conv3_1') > layers.Relu(),
HalfPadConvolution((256, 3, 3), name='conv3_2') > layers.Relu(),
HalfPadConvolution((256, 3, 3), name='conv3_3') > layers.Relu(),
HalfPadConvolution((256, 3, 3), name='conv3_4') > layers.Relu(),
layers.MaxPooling((2, 2)),
HalfPadConvolution((512, 3, 3), name='conv4_1') > layers.Relu(),
HalfPadConvolution((512, 3, 3), name='conv4_2') > layers.Relu(),
HalfPadConvolution((512, 3, 3), name='conv4_3') > layers.Relu(),
HalfPadConvolution((512, 3, 3), name='conv4_4') > layers.Relu(),
layers.MaxPooling((2, 2)),
HalfPadConvolution((512, 3, 3), name='conv5_1') > layers.Relu(),
HalfPadConvolution((512, 3, 3), name='conv5_2') > layers.Relu(),
HalfPadConvolution((512, 3, 3), name='conv5_3') > layers.Relu(),
HalfPadConvolution((512, 3, 3), name='conv5_4') > layers.Relu(),
layers.MaxPooling((2, 2)),
layers.Reshape(),
layers.Linear(4096, name='dense_1') > layers.Relu(),
layers.Dropout(0.5),
layers.Linear(4096, name='dense_2') > layers.Relu(),
layers.Dropout(0.5),
layers.Linear(1000, name='dense_3') > layers.Softmax(),
)
def test_exception(self):
with self.assertRaises(TypeError):
layers.Linear(2, weight=None)
from neupy.algorithms import LevenbergMarquardt
import LABS.ZeroLab.E_Function as dataset5
import matplotlib.pyplot as plt
from neupy import layers
if __name__ == '__main__':
(x_train, y_train), (x_test, y_test) = dataset5.load_data(train_size=6000,
show=False)
model = LevenbergMarquardt(
[
layers.Input(1),
layers.Sigmoid(20),
layers.Sigmoid(10),
layers.Linear(1),
],
error='mse',
mu=0.1,
verbose=True,
)
model.architecture()
model.train(x_train, y_train, x_test, y_test, epochs=50)
y_pred = model.predict(x_test)
plt.plot(x_test, y_test, '.b')
plt.plot(x_test, y_pred, '.r')
plt.show()
crossentropy_loss = T.sum(
T.nnet.binary_crossentropy(predicted, expected),
axis=1
)
kl_loss = -0.5 * T.sum(
1 + 2 * log_var - T.square(mean) - T.exp(2 * log_var),
axis=1
)
return (crossentropy_loss + kl_loss).mean()
# Construct Variational Autoencoder
encoder = layers.Input(784) > layers.Tanh(500)
mu = layers.Linear(2, name='mu')
sigma = layers.Linear(2, name='sigma')
sampler = [mu, sigma] > GaussianSample()
decoder = layers.Tanh(500) > layers.Sigmoid(784)
# Train network
network = algorithms.RMSProp(
encoder > sampler > decoder,
error=vae_loss,
batch_size=128,
shuffle_data=True,
step=0.001,
verbose=True,
def test_linear_layer(self):
layer = layers.Linear(1)
self.assertEqual(layer.activation_function(1), 1)
action='store_true',
help='load pretrained network from file and play without training',
)
args = parser.parse_args()
network = algorithms.RMSProp(
[
layers.Input(4),
layers.Relu(64),
layers.Relu(48),
layers.Relu(32),
layers.Relu(64) > layers.Dropout(0.2),
# Expecting two different actions:
# 1. Move left
# 2. Move right
layers.Linear(2),
],
step=0.0005,
error='rmse',
batch_size='full',
verbose=False)
env = gym.make('CartPole-v0')
env.seed(0) # To make results reproducible for the gym
memory_size = 1000 # Number of samples stored in the memory
memory = deque(maxlen=memory_size)
if args.use_pretrained:
if not os.path.exists(CARTPOLE_WEIGHTS):
raise OSError("Cannot find file with pretrained weights "
x_test -= mean
x_test /= std
return x_train, x_test, y_train, y_test
network = algorithms.Adadelta(
[
layers.Input((1, 28, 28)),
layers.Convolution((32, 3, 3)) > layers.BatchNorm() > layers.Relu(),
layers.Convolution((48, 3, 3)) > layers.BatchNorm() > layers.Relu(),
layers.MaxPooling((2, 2)),
layers.Convolution((64, 3, 3)) > layers.BatchNorm() > layers.Relu(),
layers.MaxPooling((2, 2)),
layers.Reshape(),
layers.Linear(1024) > layers.BatchNorm() > layers.Relu(),
layers.Softmax(10),
],
# Using categorical cross-entropy as a loss function
error='categorical_crossentropy',
# Min-batch size
batch_size=128,
# Learning rate. We can allow high values
# since we are using Batch Normalization
step=1.0,
# Shows information about algorithm and
# training progress in terminal
def vgg16():
"""
VGG16 network architecture with random parameters. Parameters
can be loaded using ``neupy.storage`` module.
Originally VGG16 was built in order to solve image classification
problem. It was used in the ImageNet competition. The goal of the
competition is to build a model that classifies image into one of
the 1,000 categories. Categories include animals, objects, transports
and so on.
VGG16 has roughly 138 million parameters.
Examples
--------
>>> from neupy import architectures
>>> vgg16 = architectures.vgg16()
>>> vgg16
(?, 224, 224, 3) -> [... 41 layers ...] -> (?, 1000)
>>>
>>> from neupy import algorithms
>>> optimizer = algorithms.Momentum(vgg16, verbose=True)
See Also
--------
:architecture:`vgg19` : VGG19 network
:architecture:`squeezenet` : SqueezeNet network
:architecture:`resnet50` : ResNet50 network
References
----------
Very Deep Convolutional Networks for Large-Scale Image Recognition.
https://arxiv.org/abs/1409.1556
"""
SamePadConv = layers.Convolution.define(padding='SAME')
return layers.join(
layers.Input((224, 224, 3)),
SamePadConv((3, 3, 64), name='conv1_1') >> layers.Relu(),
SamePadConv((3, 3, 64), name='conv1_2') >> layers.Relu(),
layers.MaxPooling((2, 2)),
SamePadConv((3, 3, 128), name='conv2_1') >> layers.Relu(),
SamePadConv((3, 3, 128), name='conv2_2') >> layers.Relu(),
layers.MaxPooling((2, 2)),
SamePadConv((3, 3, 256), name='conv3_1') >> layers.Relu(),
SamePadConv((3, 3, 256), name='conv3_2') >> layers.Relu(),
SamePadConv((3, 3, 256), name='conv3_3') >> layers.Relu(),
layers.MaxPooling((2, 2)),
SamePadConv((3, 3, 512), name='conv4_1') >> layers.Relu(),
SamePadConv((3, 3, 512), name='conv4_2') >> layers.Relu(),
SamePadConv((3, 3, 512), name='conv4_3') >> layers.Relu(),
layers.MaxPooling((2, 2)),
SamePadConv((3, 3, 512), name='conv5_1') >> layers.Relu(),
SamePadConv((3, 3, 512), name='conv5_2') >> layers.Relu(),
SamePadConv((3, 3, 512), name='conv5_3') >> layers.Relu(),
layers.MaxPooling((2, 2)),
layers.Reshape(),
layers.Linear(4096, name='dense_1') >> layers.Relu(),
layers.Dropout(0.5),
layers.Linear(4096, name='dense_2') >> layers.Relu(),
layers.Dropout(0.5),
layers.Linear(1000, name='dense_3') >> layers.Softmax(),
)