def test_add_list_condition():
extension_list = Checkpoint('extension_list').add_condition(
['before_first_epoch', 'after_epoch'],
OnLogRecord('notification_name'), ('dest_path.kl', ))
extension_iter = Checkpoint('extension_iter')
extension_iter.add_condition(['before_first_epoch'],
OnLogRecord('notification_name'),
('dest_path.kl', ))
extension_iter.add_condition(['after_epoch'],
OnLogRecord('notification_name'),
('dest_path.kl', ))
assert len(extension_list._conditions) == len(extension_iter._conditions)
assert_raises(ValueError,
extension_iter.add_condition,
callbacks_names='after_epoch',
predicate=OnLogRecord('notification_name'),
arguments=('dest_path.kl', ))
def test_add_list_condition():
extension_list = Checkpoint('extension_list').add_condition(
['before_first_epoch', 'after_epoch'],
OnLogRecord('notification_name'),
('dest_path.kl',))
extension_iter = Checkpoint('extension_iter')
extension_iter.add_condition(
['before_first_epoch'],
OnLogRecord('notification_name'),
('dest_path.kl',))
extension_iter.add_condition(
['after_epoch'],
OnLogRecord('notification_name'),
('dest_path.kl',))
assert len(extension_list._conditions) == len(extension_iter._conditions)
assert_raises(ValueError, extension_iter.add_condition,
callbacks_names='after_epoch',
predicate=OnLogRecord('notification_name'),
arguments=('dest_path.kl',))
def train_language_model(new_training_job, config, save_path, params,
fast_start, fuel_server, seed):
c = config
if seed:
fuel.config.default_seed = seed
blocks.config.config.default_seed = seed
data, lm, retrieval = initialize_data_and_model(config)
# full main loop can be saved...
main_loop_path = os.path.join(save_path, 'main_loop.tar')
# or only state (log + params) which can be useful not to pickle embeddings
state_path = os.path.join(save_path, 'training_state.tar')
stream_path = os.path.join(save_path, 'stream.pkl')
best_tar_path = os.path.join(save_path, "best_model.tar")
words = tensor.ltensor3('words')
words_mask = tensor.matrix('words_mask')
if theano.config.compute_test_value != 'off':
test_value_data = next(
data.get_stream('train', batch_size=4,
max_length=5).get_epoch_iterator())
words.tag.test_value = test_value_data[0]
words_mask.tag.test_value = test_value_data[1]
costs, updates = lm.apply(words, words_mask)
cost = rename(costs.mean(), 'mean_cost')
cg = Model(cost)
if params:
logger.debug("Load parameters from {}".format(params))
with open(params) as src:
cg.set_parameter_values(load_parameters(src))
length = rename(words.shape[1], 'length')
perplexity, = VariableFilter(name='perplexity')(cg)
perplexities = VariableFilter(name_regex='perplexity.*')(cg)
monitored_vars = [length, cost] + perplexities
if c['dict_path']:
num_definitions, = VariableFilter(name='num_definitions')(cg)
monitored_vars.extend([num_definitions])
parameters = cg.get_parameter_dict()
trained_parameters = parameters.values()
saved_parameters = parameters.values()
if c['embedding_path']:
logger.debug("Exclude word embeddings from the trained parameters")
trained_parameters = [
p for p in trained_parameters
if not p == lm.get_def_embeddings_params()
]
saved_parameters = [
p for p in saved_parameters
if not p == lm.get_def_embeddings_params()
]
if c['cache_size'] != 0:
logger.debug("Enable fake recursivity for looking up embeddings")
trained_parameters = [
p for p in trained_parameters if not p == lm.get_cache_params()
]
logger.info("Cost parameters" + "\n" + pprint.pformat([
" ".join(
(key, str(parameters[key].get_value().shape),
'trained' if parameters[key] in trained_parameters else 'frozen'))
for key in sorted(parameters.keys())
],
width=120))
rules = []
if c['grad_clip_threshold']:
rules.append(StepClipping(c['grad_clip_threshold']))
rules.append(Adam(learning_rate=c['learning_rate'], beta1=c['momentum']))
algorithm = GradientDescent(cost=cost,
parameters=trained_parameters,
step_rule=CompositeRule(rules))
if c['cache_size'] != 0:
algorithm.add_updates(updates)
train_monitored_vars = list(monitored_vars)
if c['grad_clip_threshold']:
train_monitored_vars.append(algorithm.total_gradient_norm)
word_emb_RMS, = VariableFilter(name='word_emb_RMS')(cg)
main_rnn_in_RMS, = VariableFilter(name='main_rnn_in_RMS')(cg)
train_monitored_vars.extend([word_emb_RMS, main_rnn_in_RMS])
if c['monitor_parameters']:
train_monitored_vars.extend(parameter_stats(parameters, algorithm))
# We use a completely random seed on purpose. With Fuel server
# it's currently not possible to restore the state of the training
# stream. That's why it's probably better to just have it stateless.
stream_seed = numpy.random.randint(0, 10000000) if fuel_server else None
training_stream = data.get_stream('train',
batch_size=c['batch_size'],
max_length=c['max_length'],
seed=stream_seed)
valid_stream = data.get_stream('valid',
batch_size=c['batch_size_valid'],
max_length=c['max_length'],
seed=stream_seed)
original_training_stream = training_stream
if fuel_server:
# the port will be configured by the StartFuelServer extension
training_stream = ServerDataStream(
sources=training_stream.sources,
produces_examples=training_stream.produces_examples)
validation = DataStreamMonitoring(monitored_vars,
valid_stream,
prefix="valid").set_conditions(
before_first_epoch=not fast_start,
on_resumption=True,
every_n_batches=c['mon_freq_valid'])
track_the_best = TrackTheBest(validation.record_name(perplexity),
choose_best=min).set_conditions(
on_resumption=True,
after_epoch=True,
every_n_batches=c['mon_freq_valid'])
# don't save them the entire main loop to avoid pickling everything
if c['fast_checkpoint']:
load = (LoadNoUnpickling(state_path,
load_iteration_state=True,
load_log=True).set_conditions(
before_training=not new_training_job))
cp_args = {
'save_main_loop': False,
'save_separately': ['log', 'iteration_state'],
'parameters': saved_parameters
}
checkpoint = Checkpoint(state_path,
before_training=not fast_start,
every_n_batches=c['save_freq_batches'],
after_training=not fast_start,
**cp_args)
if c['checkpoint_every_n_batches']:
intermediate_cp = IntermediateCheckpoint(
state_path,
every_n_batches=c['checkpoint_every_n_batches'],
after_training=False,
**cp_args)
else:
load = (Load(main_loop_path, load_iteration_state=True,
load_log=True).set_conditions(
before_training=not new_training_job))
cp_args = {
'save_separately': ['iteration_state'],
'parameters': saved_parameters
}
checkpoint = Checkpoint(main_loop_path,
before_training=not fast_start,
every_n_batches=c['save_freq_batches'],
after_training=not fast_start,
**cp_args)
if c['checkpoint_every_n_batches']:
intermediate_cp = IntermediateCheckpoint(
main_loop_path,
every_n_batches=c['checkpoint_every_n_batches'],
after_training=False,
**cp_args)
checkpoint = checkpoint.add_condition(
['after_batch', 'after_epoch'],
OnLogRecord(track_the_best.notification_name), (best_tar_path, ))
extensions = [
load,
StartFuelServer(original_training_stream,
stream_path,
before_training=fuel_server),
Timing(every_n_batches=c['mon_freq_train'])
]
if retrieval:
extensions.append(
RetrievalPrintStats(retrieval=retrieval,
every_n_batches=c['mon_freq_train'],
before_training=not fast_start))
extensions.extend([
TrainingDataMonitoring(train_monitored_vars,
prefix="train",
every_n_batches=c['mon_freq_train']),
validation, track_the_best, checkpoint
])
if c['checkpoint_every_n_batches']:
extensions.append(intermediate_cp)
extensions.extend([
DumpTensorflowSummaries(save_path,
every_n_batches=c['mon_freq_train'],
after_training=True),
Printing(on_resumption=True, every_n_batches=c['mon_freq_train']),
FinishIfNoImprovementAfter(track_the_best.notification_name,
iterations=50 * c['mon_freq_valid'],
every_n_batches=c['mon_freq_valid']),
FinishAfter(after_n_batches=c['n_batches'])
])
logger.info("monitored variables during training:" + "\n" +
pprint.pformat(train_monitored_vars, width=120))
logger.info("monitored variables during valid:" + "\n" +
pprint.pformat(monitored_vars, width=120))
main_loop = MainLoop(algorithm,
training_stream,
model=Model(cost),
extensions=extensions)
main_loop.run()
def build_and_run(save_to,modelconfig,experimentconfig):
""" part of this is adapted from lasagne tutorial"""
n, num_filters, image_size, num_blockstack = modelconfig['depth'], modelconfig['num_filters'], modelconfig['image_size'], modelconfig['num_blockstack']
print("Amount of bottlenecks: %d" % n)
# Prepare Theano variables for inputs and targets
input_var = T.tensor4('image_features')
#target_value = T.ivector('targets')
target_var = T.lmatrix('targets')
target_vec = T.extra_ops.to_one_hot(target_var[:,0],2)
#target_var = T.matrix('targets')
# Create residual net model
print("Building model...")
network = build_cnn(input_var, image_size, n, num_blockstack, num_filters)
get_info(network)
prediction = lasagne.utils.as_theano_expression(lasagne.layers.get_output(network))
test_prediction = lasagne.utils.as_theano_expression(lasagne.layers.get_output(network,deterministic=True))
# Loss function -> The objective to minimize
print("Instanciation of loss function...")
#loss = CategoricalCrossEntropy().apply(target_var.flatten(), prediction)
#test_loss = CategoricalCrossEntropy().apply(target_var.flatten(), test_prediction)
# loss = lasagne.objectives.categorical_crossentropy(prediction, target_var.flatten()).mean()
# test_loss = lasagne.objectives.categorical_crossentropy(test_prediction, target_var.flatten()).mean()
loss = lasagne.objectives.squared_error(prediction,target_vec).mean()
test_loss = lasagne.objectives.squared_error(test_prediction,target_vec).mean()
# loss = tensor.nnet.binary_crossentropy(prediction, target_var).mean()
# test_loss = tensor.nnet.binary_crossentropy(test_prediction, target_var).mean()
test_loss.name = "loss"
# loss.name = 'x-ent_error'
# loss.name = 'sqr_error'
layers = lasagne.layers.get_all_layers(network)
#l1 and l2 regularization
#pondlayers = {x:0.000025 for i,x in enumerate(layers)}
#l1_penality = lasagne.regularization.regularize_layer_params_weighted(pondlayers, lasagne.regularization.l2)
#l2_penality = lasagne.regularization.regularize_layer_params(layers[len(layers)/4:], lasagne.regularization.l1) * 25e-6
#reg_penalty = l1_penality + l2_penality
#reg_penalty.name = 'reg_penalty'
#loss = loss + reg_penalty
loss.name = 'reg_loss'
error_rate = MisclassificationRate().apply(target_var.flatten(), test_prediction).copy(
name='error_rate')
# Load the dataset
print("Loading data...")
istest = 'test' in experimentconfig.keys()
if istest:
print("Using test stream")
train_stream, valid_stream, test_stream = get_stream(experimentconfig['batch_size'],image_size,test=istest)
# Defining step rule and algorithm
if 'step_rule' in experimentconfig.keys() and not experimentconfig['step_rule'] is None :
step_rule = experimentconfig['step_rule'](learning_rate=experimentconfig['learning_rate'])
else :
step_rule=Scale(learning_rate=experimentconfig['learning_rate'])
params = map(lasagne.utils.as_theano_expression,lasagne.layers.get_all_params(network, trainable=True))
print("Initializing algorithm")
algorithm = GradientDescent(
cost=loss, gradients={var:T.grad(loss,var) for var in params},#parameters=cg.parameters, #params
step_rule=step_rule)
#algorithm.add_updates(extra_updates)
grad_norm = aggregation.mean(algorithm.total_gradient_norm)
grad_norm.name = "grad_norm"
print("Initializing extensions...")
plot = Plot(save_to, channels=[['train_loss','valid_loss'],
['train_grad_norm'],
#['train_grad_norm','train_reg_penalty'],
['train_error_rate','valid_error_rate']], server_url='http://hades.calculquebec.ca:5042')
checkpoint = Checkpoint('models/best_'+save_to+'.tar')
# checkpoint.add_condition(['after_n_batches=25'],
checkpoint.add_condition(['after_epoch'],
predicate=OnLogRecord('valid_error_rate_best_so_far'))
#Defining extensions
extensions = [Timing(),
FinishAfter(after_n_epochs=experimentconfig['num_epochs'],
after_n_batches=experimentconfig['num_batches']),
TrainingDataMonitoring([test_loss, error_rate, grad_norm], # reg_penalty],
prefix="train", after_epoch=True), #after_n_epochs=1
DataStreamMonitoring([test_loss, error_rate],valid_stream,prefix="valid", after_epoch=True), #after_n_epochs=1
plot,
#Checkpoint(save_to,after_n_epochs=5),
#ProgressBar(),
# Plot(save_to, channels=[['train_loss','valid_loss'], ['train_error_rate','valid_error_rate']], server_url='http://hades.calculquebec.ca:5042'), #'grad_norm'
# after_batch=True),
Printing(after_epoch=True),
TrackTheBest('valid_error_rate',min), #Keep best
checkpoint, #Save best
FinishIfNoImprovementAfter('valid_error_rate_best_so_far', epochs=5)] # Early-stopping
# model = Model(loss)
# print("Model",model)
main_loop = MainLoop(
algorithm,
train_stream,
# model=model,
extensions=extensions)
print("Starting main loop...")
main_loop.run()
else:
raise ValueError, conf.task
per_val_monitor = PER_Monitor(stream_val,
theano.function([x, x_m], y_hat_softmax),
before_first_epoch=True,
after_epoch=True,
prefix='valPER')
per_test_monitor = PER_Monitor(stream_test,
theano.function([x, x_m], y_hat_softmax),
before_first_epoch=False,
every_n_epochs=5,
prefix='testPER')
checkpoint = Checkpoint(conf.path_to_model, after_training=False)
checkpoint.add_condition(
['after_epoch'],
predicate=predicates.OnLogRecord('valid_log_p_best_so_far'))
extensions = [
val_monitor,
train_monitor,
per_val_monitor,
per_test_monitor,
Timing(),
FinishAfter(after_n_epochs=conf.max_epochs),
checkpoint,
Printing(),
TrackTheBest(record_name='val_monitor',
notification_name='valid_log_p_best_so_far'),
FinishIfNoImprovementAfter(notification_name='valid_log_p_best_so_far',
epochs=conf.epochs_early_stopping),
]
def build_and_run(label, config):
############## CREATE THE NETWORK ###############
#Define the parameters
num_epochs, num_batches, num_channels, image_shape, filter_size, num_filter, pooling_sizes, mlp_hiddens, output_size, batch_size, activation, mlp_activation = config['num_epochs'], config['num_batches'], config['num_channels'], config['image_shape'], config['filter_size'], config['num_filter'], config['pooling_sizes'], config['mlp_hiddens'], config['output_size'], config['batch_size'], config['activation'], config['mlp_activation']
# print(num_epochs, num_channels, image_shape, filter_size, num_filter, pooling_sizes, mlp_hiddens, output_size, batch_size, activation, mlp_activation)
lambda_l1 = 0.000025
lambda_l2 = 0.000025
print("Building model")
#Create the symbolics variable
x = T.tensor4('image_features')
y = T.lmatrix('targets')
#Get the parameters
conv_parameters = zip(filter_size, num_filter)
#Create the convolutions layers
conv_layers = list(interleave([(Convolutional(
filter_size=filter_size,
num_filters=num_filter,
name='conv_{}'.format(i))
for i, (filter_size, num_filter)
in enumerate(conv_parameters)),
(activation),
(MaxPooling(size, name='pool_{}'.format(i)) for i, size in enumerate(pooling_sizes))]))
# (AveragePooling(size, name='pool_{}'.format(i)) for i, size in enumerate(pooling_sizes))]))
#Create the sequence
conv_sequence = ConvolutionalSequence(conv_layers, num_channels, image_size=image_shape, weights_init=Uniform(width=0.2), biases_init=Constant(0.))
#Initialize the convnet
conv_sequence.initialize()
#Add the MLP
top_mlp_dims = [np.prod(conv_sequence.get_dim('output'))] + mlp_hiddens + [output_size]
out = Flattener().apply(conv_sequence.apply(x))
mlp = MLP(mlp_activation, top_mlp_dims, weights_init=Uniform(0, 0.2),
biases_init=Constant(0.))
#Initialisze the MLP
mlp.initialize()
#Get the output
predict = mlp.apply(out)
cost = CategoricalCrossEntropy().apply(y.flatten(), predict).copy(name='cost')
error = MisclassificationRate().apply(y.flatten(), predict)
#Little trick to plot the error rate in two different plots (We can't use two time the same data in the plot for a unknow reason)
error_rate = error.copy(name='error_rate')
error_rate2 = error.copy(name='error_rate2')
########### REGULARIZATION ##################
cg = ComputationGraph([cost])
weights = VariableFilter(roles=[WEIGHT])(cg.variables)
biases = VariableFilter(roles=[BIAS])(cg.variables)
# # l2_penalty_weights = T.sum([i*lambda_l2/len(weights) * (W ** 2).sum() for i,W in enumerate(weights)]) # Gradually increase penalty for layer
l2_penalty = T.sum([lambda_l2 * (W ** 2).sum() for i,W in enumerate(weights+biases)]) # Gradually increase penalty for layer
# # #l2_penalty_bias = T.sum([lambda_l2*(B **2).sum() for B in biases])
# # #l2_penalty = l2_penalty_weights + l2_penalty_bias
l2_penalty.name = 'l2_penalty'
l1_penalty = T.sum([lambda_l1*T.abs_(z).sum() for z in weights+biases])
# l1_penalty_weights = T.sum([i*lambda_l1/len(weights) * T.abs_(W).sum() for i,W in enumerate(weights)]) # Gradually increase penalty for layer
# l1_penalty_biases = T.sum([lambda_l1 * T.abs_(B).sum() for B in biases])
# l1_penalty = l1_penalty_biases + l1_penalty_weights
l1_penalty.name = 'l1_penalty'
costreg = cost + l2_penalty + l1_penalty
costreg.name = 'costreg'
########### DEFINE THE ALGORITHM #############
# algorithm = GradientDescent(cost=cost, parameters=cg.parameters, step_rule=Momentum())
algorithm = GradientDescent(cost=costreg, parameters=cg.parameters, step_rule=Adam())
########### GET THE DATA #####################
istest = 'test' in config.keys()
train_stream, valid_stream, test_stream = get_stream(batch_size,image_shape,test=istest)
########### INITIALIZING EXTENSIONS ##########
checkpoint = Checkpoint('models/best_'+label+'.tar')
checkpoint.add_condition(['after_epoch'],
predicate=OnLogRecord('valid_error_rate_best_so_far'))
#Adding a live plot with the bokeh server
plot = Plot(label,
channels=[['train_error_rate', 'valid_error_rate'],
['valid_cost', 'valid_error_rate2'],
# ['train_costreg','train_grad_norm']], #
['train_costreg','train_total_gradient_norm','train_l2_penalty','train_l1_penalty']],
server_url="http://hades.calculquebec.ca:5042")
grad_norm = aggregation.mean(algorithm.total_gradient_norm)
grad_norm.name = 'grad_norm'
extensions = [Timing(),
FinishAfter(after_n_epochs=num_epochs,
after_n_batches=num_batches),
DataStreamMonitoring([cost, error_rate, error_rate2], valid_stream, prefix="valid"),
TrainingDataMonitoring([costreg, error_rate, error_rate2,
grad_norm,l2_penalty,l1_penalty],
prefix="train", after_epoch=True),
plot,
ProgressBar(),
Printing(),
TrackTheBest('valid_error_rate',min), #Keep best
checkpoint, #Save best
FinishIfNoImprovementAfter('valid_error_rate_best_so_far', epochs=4)] # Early-stopping
model = Model(cost)
main_loop = MainLoop(algorithm,data_stream=train_stream,model=model,extensions=extensions)
main_loop.run()
def build_and_run(label, config):
############## CREATE THE NETWORK ###############
#Define the parameters
num_epochs, num_batches, num_channels, image_shape, filter_size, num_filter, pooling_sizes, mlp_hiddens, output_size, batch_size, activation, mlp_activation = config[
'num_epochs'], config['num_batches'], config['num_channels'], config[
'image_shape'], config['filter_size'], config[
'num_filter'], config['pooling_sizes'], config[
'mlp_hiddens'], config['output_size'], config[
'batch_size'], config['activation'], config[
'mlp_activation']
# print(num_epochs, num_channels, image_shape, filter_size, num_filter, pooling_sizes, mlp_hiddens, output_size, batch_size, activation, mlp_activation)
lambda_l1 = 0.000025
lambda_l2 = 0.000025
print("Building model")
#Create the symbolics variable
x = T.tensor4('image_features')
y = T.lmatrix('targets')
#Get the parameters
conv_parameters = zip(filter_size, num_filter)
#Create the convolutions layers
conv_layers = list(
interleave([(Convolutional(filter_size=filter_size,
num_filters=num_filter,
name='conv_{}'.format(i))
for i, (filter_size,
num_filter) in enumerate(conv_parameters)),
(activation),
(MaxPooling(size, name='pool_{}'.format(i))
for i, size in enumerate(pooling_sizes))]))
# (AveragePooling(size, name='pool_{}'.format(i)) for i, size in enumerate(pooling_sizes))]))
#Create the sequence
conv_sequence = ConvolutionalSequence(conv_layers,
num_channels,
image_size=image_shape,
weights_init=Uniform(width=0.2),
biases_init=Constant(0.))
#Initialize the convnet
conv_sequence.initialize()
#Add the MLP
top_mlp_dims = [np.prod(conv_sequence.get_dim('output'))
] + mlp_hiddens + [output_size]
out = Flattener().apply(conv_sequence.apply(x))
mlp = MLP(mlp_activation,
top_mlp_dims,
weights_init=Uniform(0, 0.2),
biases_init=Constant(0.))
#Initialisze the MLP
mlp.initialize()
#Get the output
predict = mlp.apply(out)
cost = CategoricalCrossEntropy().apply(y.flatten(),
predict).copy(name='cost')
error = MisclassificationRate().apply(y.flatten(), predict)
#Little trick to plot the error rate in two different plots (We can't use two time the same data in the plot for a unknow reason)
error_rate = error.copy(name='error_rate')
error_rate2 = error.copy(name='error_rate2')
########### REGULARIZATION ##################
cg = ComputationGraph([cost])
weights = VariableFilter(roles=[WEIGHT])(cg.variables)
biases = VariableFilter(roles=[BIAS])(cg.variables)
# # l2_penalty_weights = T.sum([i*lambda_l2/len(weights) * (W ** 2).sum() for i,W in enumerate(weights)]) # Gradually increase penalty for layer
l2_penalty = T.sum([
lambda_l2 * (W**2).sum() for i, W in enumerate(weights + biases)
]) # Gradually increase penalty for layer
# # #l2_penalty_bias = T.sum([lambda_l2*(B **2).sum() for B in biases])
# # #l2_penalty = l2_penalty_weights + l2_penalty_bias
l2_penalty.name = 'l2_penalty'
l1_penalty = T.sum([lambda_l1 * T.abs_(z).sum() for z in weights + biases])
# l1_penalty_weights = T.sum([i*lambda_l1/len(weights) * T.abs_(W).sum() for i,W in enumerate(weights)]) # Gradually increase penalty for layer
# l1_penalty_biases = T.sum([lambda_l1 * T.abs_(B).sum() for B in biases])
# l1_penalty = l1_penalty_biases + l1_penalty_weights
l1_penalty.name = 'l1_penalty'
costreg = cost + l2_penalty + l1_penalty
costreg.name = 'costreg'
########### DEFINE THE ALGORITHM #############
# algorithm = GradientDescent(cost=cost, parameters=cg.parameters, step_rule=Momentum())
algorithm = GradientDescent(cost=costreg,
parameters=cg.parameters,
step_rule=Adam())
########### GET THE DATA #####################
istest = 'test' in config.keys()
train_stream, valid_stream, test_stream = get_stream(batch_size,
image_shape,
test=istest)
########### INITIALIZING EXTENSIONS ##########
checkpoint = Checkpoint('models/best_' + label + '.tar')
checkpoint.add_condition(
['after_epoch'], predicate=OnLogRecord('valid_error_rate_best_so_far'))
#Adding a live plot with the bokeh server
plot = Plot(
label,
channels=[
['train_error_rate', 'valid_error_rate'],
['valid_cost', 'valid_error_rate2'],
# ['train_costreg','train_grad_norm']], #
[
'train_costreg', 'train_total_gradient_norm',
'train_l2_penalty', 'train_l1_penalty'
]
],
server_url="http://hades.calculquebec.ca:5042")
grad_norm = aggregation.mean(algorithm.total_gradient_norm)
grad_norm.name = 'grad_norm'
extensions = [
Timing(),
FinishAfter(after_n_epochs=num_epochs, after_n_batches=num_batches),
DataStreamMonitoring([cost, error_rate, error_rate2],
valid_stream,
prefix="valid"),
TrainingDataMonitoring([
costreg, error_rate, error_rate2, grad_norm, l2_penalty, l1_penalty
],
prefix="train",
after_epoch=True),
plot,
ProgressBar(),
Printing(),
TrackTheBest('valid_error_rate', min), #Keep best
checkpoint, #Save best
FinishIfNoImprovementAfter('valid_error_rate_best_so_far', epochs=4)
] # Early-stopping
model = Model(cost)
main_loop = MainLoop(algorithm,
data_stream=train_stream,
model=model,
extensions=extensions)
main_loop.run()
step_rule = Momentum(learning_rate=0.001, momentum=0.5)
#step_rule = Adam(learning_rate=0.001, beta1=0.9, beta2=0.01, epsilon=0.0001)
algorithm = GradientDescent(cost=cost,
parameters=NICE.params,
step_rule=step_rule)
monitor_variables = [cost]
#monitor = DataStreamMonitoring(variables=[cost, prior_term, jacobian_term],
# data_stream=valid_monitor_stream,
# prefix="train")
model = Model(cost)
checkpoint = Checkpoint(model_save, after_training=False)
checkpoint.add_condition(['after_epoch'],
predicate=OnLogRecord('valid_negative_ll_best_so_far'))
main_loop = MainLoop(model=model,
data_stream=train_data_stream,
algorithm=algorithm,
extensions=[Timing(),
DataStreamMonitoring(
monitor_variables, train_monitor_stream, prefix="train"),
DataStreamMonitoring(
monitor_variables, valid_monitor_stream, prefix="valid"),
FinishAfter(after_n_epochs=n_epochs),
TrackTheBest('valid_negative_ll'),
Printing(),
ProgressBar(),
checkpoint]
)
def train_lstm(train, test, input_dim,
hidden_dimension, columns, epochs,
save_file, execution_name, batch_size, plot):
stream_train = build_stream(train, batch_size, columns)
stream_test = build_stream(test, batch_size, columns)
# The train stream will return (TimeSequence, BatchSize, Dimensions) for
# and the train test will return (TimeSequence, BatchSize, 1)
x = T.tensor3('x')
y = T.tensor3('y')
y = y.reshape((y.shape[1], y.shape[0], y.shape[2]))
# input_dim = 6
# output_dim = 1
linear_lstm = LinearLSTM(input_dim, 1, hidden_dimension,
# print_intermediate=True,
print_attrs=['__str__', 'shape'])
y_hat = linear_lstm.apply(x)
linear_lstm.initialize()
c_test = AbsolutePercentageError().apply(y, y_hat)
c_test.name = 'mape'
c = SquaredError().apply(y, y_hat)
c.name = 'cost'
cg = ComputationGraph(c_test)
def one_perc_min(current_value, best_value):
if (1 - best_value / current_value) > 0.01:
return best_value
else:
return current_value
extensions = []
extensions.append(DataStreamMonitoring(variables=[c, c_test],
data_stream=stream_test,
prefix='test',
after_epoch=False,
every_n_epochs=100))
extensions.append(TrainingDataMonitoring(variables=[c_test],
prefix='train',
after_epoch=True))
extensions.append(FinishAfter(after_n_epochs=epochs))
# extensions.append(Printing())
# extensions.append(ProgressBar())
extensions.append(TrackTheBest('test_mape', choose_best=one_perc_min))
extensions.append(TrackTheBest('test_cost', choose_best=one_perc_min))
extensions.append(FinishIfNoImprovementAfter('test_cost_best_so_far', epochs=500))
# Save only parameters, not the whole main loop and only when best_test_cost is updated
checkpoint = Checkpoint(save_file, save_main_loop=False, after_training=False)
checkpoint.add_condition(['after_epoch'], predicate=OnLogRecord('test_cost_best_so_far'))
extensions.append(checkpoint)
if BOKEH_AVAILABLE and plot:
extensions.append(Plot(execution_name, channels=[[ # 'train_cost',
'test_cost']]))
step_rule = Adam()
algorithm = GradientDescent(cost=c_test, parameters=cg.parameters, step_rule=step_rule)
main_loop = MainLoop(algorithm, stream_train, model=Model(c_test), extensions=extensions)
main_loop.run()
test_mape = 0
if main_loop.log.status.get('best_test_mape', None) is None:
with open(save_file, 'rb') as f:
parameters = load_parameters(f)
model = main_loop.model
model.set_parameter_values(parameters)
ev = DatasetEvaluator([c_test])
test_mape = ev.evaluate(stream_test)['mape']
else:
test_mape = main_loop.log.status['best_test_mape']
return test_mape, main_loop.log.status['epochs_done']
train_monitor = TrainingDataMonitoring([cost_monitor], prefix="train")
val_monitor = DataStreamMonitoring([cost_monitor], stream_val, prefix="val")
if conf.task=='CTC':
PER_Monitor = PhonemeErrorRate
elif conf.task=='framewise':
PER_Monitor = PhonemeErrorRateFramewise
else:
raise ValueError, conf.task
per_val_monitor = PER_Monitor(stream_val, theano.function([x,x_m],y_hat_softmax),
before_first_epoch=True,after_epoch=True, prefix='valPER')
per_test_monitor = PER_Monitor(stream_test, theano.function([x,x_m],y_hat_softmax),
before_first_epoch=False, every_n_epochs=5, prefix='testPER')
checkpoint=Checkpoint(conf.path_to_model, after_training=False)
checkpoint.add_condition(['after_epoch'], predicate=predicates.OnLogRecord('valid_log_p_best_so_far'))
extensions=[val_monitor,
train_monitor,
per_val_monitor,
per_test_monitor,
Timing(),
FinishAfter(after_n_epochs=conf.max_epochs),
checkpoint,
Printing(),
TrackTheBest(record_name='val_monitor',notification_name='valid_log_p_best_so_far'),
FinishIfNoImprovementAfter(notification_name='valid_log_p_best_so_far', epochs=conf.epochs_early_stopping),
]
main_loop = MainLoop(
algorithm = algorithm,
data_stream = stream_train,
model = model,
def build_and_run(experimentconfig, modelconfig, save_to=None): #modelconfig,
""" part of this is adapted from lasagne tutorial"""
# Prepare Theano variables for inputs and targets
input_var = T.tensor4('image_features')
target_var = T.lmatrix('targets')
target_vec = T.extra_ops.to_one_hot(target_var[:,0],2)
# Create vgg model
print("Building model...")
image_size = modelconfig['image_size']
network = vgg16.build_small_model()
prediction = lasagne.utils.as_theano_expression(lasagne.layers.get_output(network["prob"],input_var))
# test_prediction = lasagne.layers.get_output(network["prob"],input_var,deterministic=True)
# Loss function -> The objective to minimize
print("Instanciation of loss function...")
# loss = lasagne.objectives.categorical_crossentropy(prediction, target_var.flatten())
loss = lasagne.objectives.squared_error(prediction,target_vec)
# test_loss = lasagne.objectives.squared_error(test_prediction,target_vec)
loss = loss.mean()
# layers = network.values()
#l1 and l2 regularization
# pondlayers = {x:0.01 for x in layers}
# l1_penality = lasagne.regularization.regularize_layer_params_weighted(pondlayers, lasagne.regularization.l2)
# l2_penality = lasagne.regularization.regularize_layer_params(layers[len(layers)/4:], lasagne.regularization.l1) * 1e-4
# reg_penalty = l1_penality + l2_penality
# reg_penalty.name = 'reg_penalty'
#loss = loss + reg_penalty
loss.name = 'loss'
error_rate = MisclassificationRate().apply(target_var.flatten(), prediction).copy(
name='error_rate')
# Load the dataset
print("Loading data...")
if 'test' in experimentconfig.keys() and experimentconfig['test'] is True:
train_stream, valid_stream, test_stream = get_stream(experimentconfig['batch_size'],image_size,test=True)
else :
train_stream, valid_stream, test_stream = get_stream(experimentconfig['batch_size'],image_size,test=False)
# Defining step rule and algorithm
if 'step_rule' in experimentconfig.keys() and not experimentconfig['step_rule'] is None :
step_rule = experimentconfig['step_rule'](learning_rate=experimentconfig['learning_rate'])
else :
step_rule=Scale(learning_rate=experimentconfig['learning_rate'])
params = map(lasagne.utils.as_theano_expression,lasagne.layers.get_all_params(network['prob'], trainable=True))
algorithm = GradientDescent(
cost=loss, gradients={var:T.grad(loss,var) for var in params},
step_rule=step_rule)
grad_norm = aggregation.mean(algorithm.total_gradient_norm)
grad_norm.name='grad_norm'
print("Initializing extensions...")
plot = Plot(save_to, channels=[['train_loss','valid_loss','train_grad_norm'],['train_error_rate','valid_error_rate']], server_url='http://hades.calculquebec.ca:5042')
checkpoint = Checkpoint('models/best_'+save_to+'.tar')
# checkpoint.add_condition(['after_n_batches=25'],
checkpoint.add_condition(['after_epoch'],
predicate=OnLogRecord('valid_error_rate_best_so_far'))
#Defining extensions
extensions = [Timing(),
FinishAfter(after_n_epochs=experimentconfig['num_epochs'],
after_n_batches=experimentconfig['num_batches']),
TrainingDataMonitoring([loss, error_rate, grad_norm, reg_penalty], prefix="train", after_epoch=True), #after_n_epochs=1
DataStreamMonitoring([loss, error_rate],valid_stream,prefix="valid", after_epoch=True), #after_n_epochs=1
#Checkpoint(save_to,after_n_epochs=5),
#ProgressBar(),
plot,
# after_batch=True),
Printing(after_epoch=True),
TrackTheBest('valid_error_rate',min), #Keep best
checkpoint, #Save best
FinishIfNoImprovementAfter('valid_error_rate_best_so_far', epochs=5)] # Early-stopping
# model = Model(ComputationGraph(network))
main_loop = MainLoop(
algorithm,
train_stream,
# model=model,
extensions=extensions)
print("Starting main loop...")
main_loop.run()
def train_model(new_training_job, config, save_path, params, fast_start,
fuel_server, seed):
c = config
if seed:
fuel.config.default_seed = seed
blocks.config.config.default_seed = seed
data, model = initialize_data_and_model(config, train_phase=True)
# full main loop can be saved...
main_loop_path = os.path.join(save_path, 'main_loop.tar')
# or only state (log + params) which can be useful not to pickle embeddings
state_path = os.path.join(save_path, 'training_state.tar')
stream_path = os.path.join(save_path, 'stream.pkl')
best_tar_path = os.path.join(save_path, "best_model.tar")
keys = tensor.lmatrix('keys')
n_identical_keys = tensor.lvector('n_identical_keys')
words = tensor.ltensor3('words')
words_mask = tensor.matrix('words_mask')
if theano.config.compute_test_value != 'off':
#TODO
test_value_data = next(
data.get_stream('train', batch_size=4,
max_length=5).get_epoch_iterator())
words.tag.test_value = test_value_data[0]
words_mask.tag.test_value = test_value_data[1]
if use_keys(c) and use_n_identical_keys(c):
costs = model.apply(words,
words_mask,
keys,
n_identical_keys,
train_phase=True)
elif use_keys(c):
costs = model.apply(words, words_mask, keys, train_phase=True)
else:
costs = model.apply(words, words_mask, train_phase=True)
cost = rename(costs.mean(), 'mean_cost')
cg = Model(cost)
if params:
logger.debug("Load parameters from {}".format(params))
with open(params) as src:
cg.set_parameter_values(load_parameters(src))
length = rename(words.shape[1], 'length')
perplexity, = VariableFilter(name='perplexity')(cg)
monitored_vars = [length, cost, perplexity]
if c['proximity_coef']:
proximity_term, = VariableFilter(name='proximity_term')(cg)
monitored_vars.append(proximity_term)
print "inputs of the model:", cg.inputs
parameters = cg.get_parameter_dict()
trained_parameters = parameters.values()
saved_parameters = parameters.values()
if c['embedding_path']:
if c['freeze_pretrained']:
logger.debug(
"Exclude pretrained encoder embeddings from the trained parameters"
)
to_freeze = 'main'
elif c['provide_targets']:
logger.debug(
"Exclude pretrained targets from the trained parameters")
to_freeze = 'target'
trained_parameters = [
p for p in trained_parameters
if not p == model.get_def_embeddings_params(to_freeze)
]
saved_parameters = [
p for p in saved_parameters
if not p == model.get_def_embeddings_params(to_freeze)
]
logger.info("Cost parameters" + "\n" + pprint.pformat([
" ".join(
(key, str(parameters[key].get_value().shape),
'trained' if parameters[key] in trained_parameters else 'frozen'))
for key in sorted(parameters.keys())
],
width=120))
rules = []
if c['grad_clip_threshold']:
rules.append(StepClipping(c['grad_clip_threshold']))
rules.append(Adam(learning_rate=c['learning_rate'], beta1=c['momentum']))
algorithm = GradientDescent(cost=cost,
parameters=trained_parameters,
step_rule=CompositeRule(rules))
train_monitored_vars = list(monitored_vars)
if c['grad_clip_threshold']:
train_monitored_vars.append(algorithm.total_gradient_norm)
if c['monitor_parameters']:
train_monitored_vars.extend(parameter_stats(parameters, algorithm))
# We use a completely random seed on purpose. With Fuel server
# it's currently not possible to restore the state of the training
# stream. That's why it's probably better to just have it stateless.
stream_seed = numpy.random.randint(0, 10000000) if fuel_server else None
training_stream = data.get_stream(
'train',
batch_size=c['batch_size'],
max_length=c['max_length'],
seed=stream_seed,
remove_keys=not use_keys(c),
remove_n_identical_keys=not use_n_identical_keys(c))
print "trainin_stream will contains sources:", training_stream.sources
original_training_stream = training_stream
if fuel_server:
# the port will be configured by the StartFuelServer extension
training_stream = ServerDataStream(
sources=training_stream.sources,
produces_examples=training_stream.produces_examples)
validate = c['mon_freq_valid'] > 0
if validate:
valid_stream = data.get_stream(
'valid',
batch_size=c['batch_size_valid'],
max_length=c['max_length'],
seed=stream_seed,
remove_keys=not use_keys(c),
remove_n_identical_keys=not use_n_identical_keys(c))
validation = DataStreamMonitoring(
monitored_vars, valid_stream,
prefix="valid").set_conditions(before_first_epoch=not fast_start,
on_resumption=True,
every_n_batches=c['mon_freq_valid'])
track_the_best = TrackTheBest(validation.record_name(cost),
choose_best=min).set_conditions(
on_resumption=True,
after_epoch=True,
every_n_batches=c['mon_freq_valid'])
# don't save them the entire main loop to avoid pickling everything
if c['fast_checkpoint']:
cp_path = state_path
load = (LoadNoUnpickling(cp_path,
load_iteration_state=True,
load_log=True).set_conditions(
before_training=not new_training_job))
cp_args = {
'save_main_loop': False,
'save_separately': ['log', 'iteration_state'],
'parameters': saved_parameters
}
else:
cp_path = main_loop_path
load = (Load(cp_path, load_iteration_state=True,
load_log=True).set_conditions(
before_training=not new_training_job))
cp_args = {
'save_separately': ['iteration_state'],
'parameters': saved_parameters
}
checkpoint = Checkpoint(cp_path,
before_training=not fast_start,
every_n_batches=c['save_freq_batches'],
after_training=not fast_start,
**cp_args)
if c['checkpoint_every_n_batches'] > 0 or c[
'checkpoint_every_n_epochs'] > 0:
intermediate_cp = IntermediateCheckpoint(
cp_path,
every_n_epochs=c['checkpoint_every_n_epochs'],
every_n_batches=c['checkpoint_every_n_batches'],
after_training=False,
**cp_args)
if validate:
checkpoint = checkpoint.add_condition(
['after_batch', 'after_epoch'],
OnLogRecord(track_the_best.notification_name), (best_tar_path, ))
extensions = [
load,
StartFuelServer(original_training_stream,
stream_path,
before_training=fuel_server),
Timing(every_n_batches=c['mon_freq_train'])
]
extensions.extend([
TrainingDataMonitoring(train_monitored_vars,
prefix="train",
every_n_batches=c['mon_freq_train']),
])
if validate:
extensions.extend([validation, track_the_best])
extensions.append(checkpoint)
if c['checkpoint_every_n_batches'] > 0 or c[
'checkpoint_every_n_epochs'] > 0:
extensions.append(intermediate_cp)
extensions.extend(
[Printing(on_resumption=True, every_n_batches=c['mon_freq_train'])])
if validate and c['n_valid_early'] > 0:
extensions.append(
FinishIfNoImprovementAfter(track_the_best.notification_name,
iterations=c['n_valid_early'] *
c['mon_freq_valid'],
every_n_batches=c['mon_freq_valid']))
extensions.append(FinishAfter(after_n_epochs=c['n_epochs']))
logger.info("monitored variables during training:" + "\n" +
pprint.pformat(train_monitored_vars, width=120))
logger.info("monitored variables during valid:" + "\n" +
pprint.pformat(monitored_vars, width=120))
main_loop = MainLoop(algorithm,
training_stream,
model=Model(cost),
extensions=extensions)
main_loop.run()
