def train(cli_params):
fn = 'noname'
if 'save_to' in nodefaultargs or not cli_params.get('load_from'):
fn = cli_params['save_to']
cli_params['save_dir'] = prepare_dir(fn)
nodefaultargs.append('save_dir')
logfile = os.path.join(cli_params['save_dir'], 'log.txt')
# Log also DEBUG to a file
fh = logging.FileHandler(filename=logfile)
fh.setLevel(logging.DEBUG)
logger.addHandler(fh)
logger.info('Logging into %s' % logfile)
p, loaded = load_and_log_params(cli_params)
in_dim, data, whiten, cnorm = setup_data(p, test_set=False)
if not loaded:
# Set the zero layer to match input dimensions
p.encoder_layers = (in_dim, ) + p.encoder_layers
ladder = setup_model(p)
# Training
all_params = ComputationGraph([ladder.costs.total]).parameters
logger.info('Found the following parameters: %s' % str(all_params))
# Fetch all batch normalization updates. They are in the clean path.
# you can turn off BN by setting is_normalizing = False in ladder.py
bn_updates = ComputationGraph([ladder.costs.class_clean]).updates
assert not bn_updates or 'counter' in [u.name for u in bn_updates.keys()], \
'No batch norm params in graph - the graph has been cut?'
training_algorithm = GradientDescent(
cost=ladder.costs.total,
parameters=all_params,
step_rule=Adam(learning_rate=ladder.lr))
# In addition to actual training, also do BN variable approximations
if bn_updates:
training_algorithm.add_updates(bn_updates)
short_prints = {
"train":
OrderedDict([
('T_E', ladder.error.clean),
('T_O', ladder.oos.clean),
('T_C_class', ladder.costs.class_corr),
('T_C_de', ladder.costs.denois.values()),
('T_T', ladder.costs.total),
]),
"valid_approx":
OrderedDict([
('V_C_class', ladder.costs.class_clean),
('V_E', ladder.error.clean),
('V_O', ladder.oos.clean),
('V_C_de', ladder.costs.denois.values()),
('V_T', ladder.costs.total),
]),
"valid_final":
OrderedDict([
('VF_C_class', ladder.costs.class_clean),
('VF_E', ladder.error.clean),
('VF_O', ladder.oos.clean),
('VF_C_de', ladder.costs.denois.values()),
('V_T', ladder.costs.total),
]),
}
if len(data.valid_ind):
main_loop = MainLoop(
training_algorithm,
# Datastream used for training
make_datastream(data.train,
data.train_ind,
p.batch_size,
n_labeled=p.labeled_samples,
n_unlabeled=p.unlabeled_samples,
whiten=whiten,
cnorm=cnorm,
balanced_classes=p.balanced_classes,
dseed=p.dseed),
model=Model(ladder.costs.total),
extensions=[
FinishAfter(after_n_epochs=p.num_epochs),
# This will estimate the validation error using
# running average estimates of the batch normalization
# parameters, mean and variance
ApproxTestMonitoring([
ladder.costs.class_clean, ladder.error.clean,
ladder.oos.clean, ladder.costs.total
] + ladder.costs.denois.values(),
make_datastream(
data.valid,
data.valid_ind,
p.valid_batch_size,
whiten=whiten,
cnorm=cnorm,
balanced_classes=p.balanced_classes,
scheme=ShuffledScheme),
prefix="valid_approx"),
# This Monitor is slower, but more accurate since it will first
# estimate batch normalization parameters from training data and
# then do another pass to calculate the validation error.
FinalTestMonitoring(
[
ladder.costs.class_clean, ladder.error.clean,
ladder.oos.clean, ladder.costs.total
] + ladder.costs.denois.values(),
make_datastream(data.train,
data.train_ind,
p.batch_size,
n_labeled=p.labeled_samples,
whiten=whiten,
cnorm=cnorm,
balanced_classes=p.balanced_classes,
scheme=ShuffledScheme),
make_datastream(data.valid,
data.valid_ind,
p.valid_batch_size,
n_labeled=len(data.valid_ind),
whiten=whiten,
cnorm=cnorm,
balanced_classes=p.balanced_classes,
scheme=ShuffledScheme),
prefix="valid_final",
after_n_epochs=p.num_epochs,
after_training=True),
TrainingDataMonitoring([
ladder.error.clean, ladder.oos.clean, ladder.costs.total,
ladder.costs.class_corr,
training_algorithm.total_gradient_norm
] + ladder.costs.denois.values(),
prefix="train",
after_epoch=True),
# ladder.costs.class_clean - save model whenever we have best validation result another option `('train',ladder.costs.total)`
SaveParams(('valid_approx', ladder.error.clean),
all_params,
p.save_dir,
after_epoch=True),
SaveExpParams(p, p.save_dir, before_training=True),
SaveLog(p.save_dir, after_training=True),
ShortPrinting(short_prints),
LRDecay(ladder.lr,
p.num_epochs * p.lrate_decay,
p.num_epochs,
lrmin=p.lrmin,
after_epoch=True),
])
else:
main_loop = MainLoop(
training_algorithm,
# Datastream used for training
make_datastream(data.train,
data.train_ind,
p.batch_size,
n_labeled=p.labeled_samples,
n_unlabeled=p.unlabeled_samples,
whiten=whiten,
cnorm=cnorm,
balanced_classes=p.balanced_classes,
dseed=p.dseed),
model=Model(ladder.costs.total),
extensions=[
FinishAfter(after_n_epochs=p.num_epochs),
TrainingDataMonitoring([
ladder.error.clean, ladder.oos.clean, ladder.costs.total,
ladder.costs.class_corr,
training_algorithm.total_gradient_norm
] + ladder.costs.denois.values(),
prefix="train",
after_epoch=True),
# ladder.costs.class_clean - save model whenever we have best validation result another option `('train',ladder.costs.total)`
SaveParams(('train', ladder.error.clean),
all_params,
p.save_dir,
after_epoch=True),
SaveExpParams(p, p.save_dir, before_training=True),
SaveLog(p.save_dir, after_training=True),
ShortPrinting(short_prints),
LRDecay(ladder.lr,
p.num_epochs * p.lrate_decay,
p.num_epochs,
lrmin=p.lrmin,
after_epoch=True),
])
main_loop.run()
# Get results
if len(data.valid_ind) == 0:
return None
df = DataFrame.from_dict(main_loop.log, orient='index')
col = 'valid_final_error_rate_clean'
logger.info('%s %g' % (col, df[col].iloc[-1]))
if main_loop.log.status['epoch_interrupt_received']:
return None
return df
def train(cli_params):
cli_params['save_dir'] = prepare_dir(cli_params['save_to'])
logfile = os.path.join(cli_params['save_dir'], 'log.txt')
# Log also DEBUG to a file
fh = logging.FileHandler(filename=logfile)
fh.setLevel(logging.DEBUG)
logger.addHandler(fh)
logger.info('Logging into %s' % logfile)
p, loaded = load_and_log_params(cli_params)
in_dim, data = setup_data(p, test_set=False)
if not loaded:
# Set the zero layer to match input dimensions
p.encoder_layers = (in_dim, ) + p.encoder_layers
ladder = setup_model(p)
# Training
all_params = ComputationGraph([ladder.costs.total]).parameters
logger.info('Found the following parameters: %s' % str(all_params))
# Fetch all batch normalization updates. They are in the clean path.
bn_updates = ComputationGraph([ladder.costs.class_clean]).updates
assert 'counter' in [u.name for u in list(bn_updates.keys())], \
'No batch norm params in graph - the graph has been cut?'
training_algorithm = GradientDescent(
cost=ladder.costs.total,
params=all_params,
step_rule=Adam(learning_rate=ladder.lr))
# In addition to actual training, also do BN variable approximations
training_algorithm.add_updates(bn_updates)
short_prints = {
"train": {
'T_C_class': ladder.costs.class_corr,
'T_C_de': list(ladder.costs.denois.values()),
},
"valid_approx":
OrderedDict([
('V_C_class', ladder.costs.class_clean),
('V_E', ladder.error.clean),
('V_C_de', list(ladder.costs.denois.values())),
]),
"valid_final":
OrderedDict([
('VF_C_class', ladder.costs.class_clean),
('VF_E', ladder.error.clean),
('VF_C_de', list(ladder.costs.denois.values())),
]),
}
main_loop = MainLoop(
training_algorithm,
# Datastream used for training
make_datastream(data.train,
data.train_ind,
p.batch_size,
n_labeled=p.labeled_samples,
n_unlabeled=p.unlabeled_samples),
model=Model(theano.tensor.cast(ladder.costs.total, "float32")),
extensions=[
FinishAfter(after_n_epochs=p.num_epochs),
# This will estimate the validation error using
# running average estimates of the batch normalization
# parameters, mean and variance
ApproxTestMonitoring(
[ladder.costs.class_clean, ladder.error.clean] +
list(ladder.costs.denois.values()),
make_datastream(data.valid,
data.valid_ind,
p.valid_batch_size,
scheme=ShuffledScheme),
prefix="valid_approx"),
TrainingDataMonitoring([
ladder.costs.total, ladder.costs.class_corr,
training_algorithm.total_gradient_norm
] + list(ladder.costs.denois.values()),
prefix="train",
after_epoch=True),
SaveParams(None, all_params, p.save_dir, after_epoch=True),
SaveExpParams(p, p.save_dir, before_training=True),
ShortPrinting(short_prints),
LRDecay(ladder.lr,
p.num_epochs * p.lrate_decay,
p.num_epochs,
after_epoch=True),
])
main_loop.run()
# Get results
df = main_loop.log.to_dataframe()
col = 'valid_final_error_rate_clean'
logger.info('%s %g' % (col, df[col].iloc[-1]))
if main_loop.log.status['epoch_interrupt_received']:
return None
return df
def train(self):
""" Setup and train the model """
to_train = ComputationGraph([self.tagger.total_cost]).parameters
logger.info('Found the following parameters: %s' % str(to_train))
step_rule = Adam(learning_rate=self.p.lr)
training_algorithm = GradientDescent(
cost=self.tagger.total_cost, parameters=to_train, step_rule=step_rule,
on_unused_sources='warn',
theano_func_kwargs={'on_unused_input': 'warn'}
)
# TRACKED GRAPH NODES
train_params = {
'Train_Denoising_Cost': self.tagger.corr.denoising_cost,
}
if self.p.class_cost_x > 0:
train_params['Train_Classification_Cost'] = self.tagger.corr.class_cost
train_params['Train_Classification_Error'] = self.tagger.clean.class_error
valid_params = {
'Validation_Denoising_Cost': self.tagger.corr.denoising_cost,
}
if self.p.class_cost_x > 0:
valid_params['Validation_Classification_Cost'] = self.tagger.corr.class_cost
valid_params['Validation_Classification_Error'] = self.tagger.clean.class_error
test_params = {
'Test_AMI_Score': self.tagger.clean.ami_score,
'Test_Denoising_Cost': self.tagger.corr.denoising_cost,
}
if self.p.class_cost_x > 0:
test_params['Test_Classification_Cost'] = self.tagger.corr.class_cost
test_params['Test_Classification_Error'] = self.tagger.clean.class_error
short_prints = {
"train": train_params,
"valid": valid_params,
"test": test_params,
}
main_loop = MainLoop(
training_algorithm,
# Datastream used for training
self.streams['train'],
model=Model(self.tagger.total_cost),
extensions=[
FinishAfter(after_n_epochs=self.p.num_epochs),
SaveParams(self.p.get('save_freq', 0), self.tagger, self.save_dir, before_epoch=True),
DataStreamMonitoring(
valid_params.values(),
self.streams['valid'],
prefix="valid"
),
FinalTestMonitoring(
test_params.values(),
self.streams['train'],
{'valid': self.streams['valid'], 'test': self.streams['test']},
after_training=True
),
TrainingDataMonitoring(
train_params.values(),
prefix="train", after_epoch=True
),
SaveExpParams(self.p, self.save_dir, before_training=True),
Timing(after_epoch=True),
ShortPrinting(short_prints, after_epoch=True),
])
logger.info('Running the main loop')
main_loop.run()