def run_epoch(trainobj):
"""
Runs an epoch. Returns True to continue or
False to terminate.
"""
if trainobj.first_callbacks_and_monitoring:
trainobj.run_callbacks_and_monitoring()
trainobj.first_callbacks_and_monitoring = False
return True
rval = True
if trainobj.algorithm is None:
rval = trainobj.model.train_all(dataset=trainobj.dataset)
if rval is not None:
raise ValueError("Model.train_all should not return " +
"anything. Use Model.continue_learning " +
"to control whether learning continues.")
rval = post_epoch(trainobj)
else:
with log_timing(logger, None, level=logging.DEBUG,
callbacks=[trainobj.total_seconds.set_value]):
with log_timing(logger, None, final_msg='Time this epoch:',
callbacks=[trainobj.training_seconds.set_value]):
rval = trainobj.algorithm.train(dataset=trainobj.dataset)
if rval is not None:
raise ValueError("TrainingAlgorithm.train should not "
"return anything. Use "
"TrainingAlgorithm.continue_learning "
"to control whether learning "
"continues.")
rval = post_epoch(trainobj)
return rval
def main():
parser = argparse.ArgumentParser(description='Collect statistics.')
parser.add_argument('infile',
nargs='+',
type=argparse.FileType('r'),
help="The pickle files to read.")
parser.add_argument('-O',
'--output',
type=argparse.FileType('w'),
help="Output CSV file to write.")
args = parser.parse_args()
names = [(a.name, a) for a in args.infile]
indices = [b[0] for b in names]
columns = ['weight_scaling_error', 'geometric_error', 'arithmetic_error']
df = pd.DataFrame(index=indices, columns=columns)
try:
dataset = None
for i, (name, model_handle) in enumerate(names):
with log_timing(
log,
"Processing %s [%d / %d]" % (name, i + 1, len(names))):
with model_handle as f:
model = cPickle.load(f)
if dataset is None:
with log_timing(log,
"Loading test set",
final_msg="Loaded."):
d = None
# HACK HACK HACK
for k in model.monitor._datasets:
if 'valid' in k or '50000' in k:
d = k
break
if d is None:
log.warning("No validation set found, using "
"first dataset in monitor.")
d = model.monitor._datasets[0]
dataset = yload(d).get_test_set()
d = compare_ensemble(model,
dataset,
input_scales={
'h1': 2.,
'y': 2.
})
df['weight_scaling_error'][name] = d['weight_scaling_error']
df['geometric_error'][name] = d['geometric_error']
df['arithmetic_error'][name] = d['arithmetic_error']
np.save(model_handle.name + '.sca.npy',
d['weight_scaling_output'])
np.save(model_handle.name + '.geo.npy', d['geometric_output'])
np.save(model_handle.name + '.ari.npy', d['arithmetic_output'])
finally:
df.to_csv(args.output)
def process_dataset(model, dataset, data_specs=None, output_fn=None, batch_size=128):
if data_specs is None:
data_specs = (CompositeSpace((
model.get_input_space(),
model.get_output_space())),
("features", "targets"));
if output_fn is None:
with log_timing(log, 'compiling output_fn'):
minibatch = model.get_input_space().make_theano_batch();
output_fn = theano.function(inputs=[minibatch],
outputs=model.fprop(minibatch));
it = dataset.iterator(mode='sequential',
batch_size=batch_size,
data_specs=data_specs);
y_pred = [];
y_real = [];
output = [];
for minibatch, target in it:
out = output_fn(minibatch); # this hangs for convnet on Jeep2
output.append(out);
# print out
# print out.shape
y_pred.append(np.argmax(out, axis = 1));
y_real.append(np.argmax(target, axis = 1));
y_pred = np.hstack(y_pred);
y_real = np.hstack(y_real);
output = np.vstack(output);
return y_real, y_pred, output;
def on_monitor(self, model, dataset, algorithm):
"""
Looks whether the model performs better than earlier. If it's the
case, saves the model.
Parameters
----------
model : pylearn2.models.model.Model
model.monitor must contain a channel with name given by
self.channel_name
dataset : pylearn2.datasets.dataset.Dataset
Not used
algorithm : TrainingAlgorithm
Not used
"""
monitor = model.monitor
channels = monitor.channels
channel = channels[self.channel_name]
val_record = channel.val_record
new_cost = val_record[-1]
if self.coeff * new_cost < self.coeff * self.best_cost:
self.best_cost = new_cost
# Update the tag of the model object before saving it.
self._update_tag(model)
if self.store_best_model:
self.best_model = deepcopy(model)
if self.save_path is not None:
with log_timing(log, 'Saving to ' + self.save_path):
serial.save(self.save_path, model, on_overwrite='backup')
def on_monitor(self, model, dataset, algorithm):
epoch = algorithm.monitor._epochs_seen;
model_file = self.save_path + self.save_prefix + str(epoch) + '.pkl';
with log_timing(log, 'saving model to {}'.format(model_file)):
serial.save(model_file, model, on_overwrite = 'backup')
def process_dataset(model, dataset, data_specs=None, output_fn=None):
if data_specs is None:
data_specs = (CompositeSpace((
model.get_input_space(),
model.get_output_space())),
("features", "targets"));
if output_fn is None:
with log_timing(log, 'compiling output_fn'):
minibatch = model.get_input_space().make_theano_batch();
output_fn = theano.function(inputs=[minibatch],
outputs=model.fprop(minibatch));
it = dataset.iterator('sequential',
batch_size=100,
data_specs=data_specs);
y_pred = [];
y_real = [];
output = [];
for minibatch, target in it:
out = output_fn(minibatch); # this hangs for convnet on Jeep2
output.append(out);
y_pred.append(np.argmax(out, axis = 1));
y_real.append(np.argmax(target, axis = 1));
y_pred = np.hstack(y_pred);
y_real = np.hstack(y_real);
output = np.vstack(output);
return y_real, y_pred, output;
def on_monitor(self, model, dataset, algorithm):
epoch = algorithm.monitor._epochs_seen
model_file = self.save_path + self.save_prefix + str(epoch) + '.pkl'
with log_timing(log, 'saving model to {}'.format(model_file)):
serial.save(model_file, model, on_overwrite='backup')
def on_monitor(self, model, dataset, algorithm):
"""
Looks whether the model performs better than earlier
- or equally good (modification).
If it's the case, saves the model.
Parameters
----------
model : pylearn2.models.model.Model
model.monitor must contain a channel with name given by
self.channel_name
dataset : pylearn2.datasets.dataset.Dataset
Not used
algorithm : TrainingAlgorithm
Not used
"""
monitor = model.monitor
channels = monitor.channels
channel = channels[self.channel_name]
val_record = channel.val_record
new_cost = val_record[-1]
if self.coeff * new_cost <= self.coeff * self.best_cost and \
monitor._epochs_seen >= self.start_epoch:
self.best_cost = new_cost
# Update the tag of the model object before saving it.
self._update_tag(model)
if self.store_best_model:
self.best_model = deepcopy(model)
if self.save_path is not None:
with log_timing(log, 'Saving to ' + self.save_path):
serial.save(self.save_path, model, on_overwrite='backup')
def extract_output(config, best_epoch):
# load best model
model_file = os.path.join(config.experiment_root, 'epochs',
'epoch{}.pkl'.format(best_epoch))
print 'loading ' + model_file
model = serial.load(model_file)
# print model;
# additional dataset params
config.start_sample = 11200
config.stop_sample = 12800
config.name = 'test'
# load dataset
dataset, dataset_yaml = load_yaml_file(
os.path.join(os.path.dirname(__file__), '..', 'run',
'dataset_template.yaml'),
params=config,
)
with log_timing(log, 'processing dataset'):
y_real, y_pred, output = process_dataset(model, dataset)
return y_real, y_pred, output
def main_loop(self):
"""
Repeatedly runs an epoch of the training algorithm, runs any
epoch-level callbacks, and saves the model.
"""
if self.algorithm is None:
self.model.monitor = Monitor.get_monitor(self.model)
self.setup_extensions()
self.run_callbacks_and_monitoring()
while True:
rval = self.model.train_all(dataset=self.dataset)
if rval is not None:
raise ValueError("Model.train_all should not return anything. Use Model.continue_learning to control whether learning continues.")
self.model.monitor.report_epoch()
if self.save_freq > 0 and self.model.monitor.epochs_seen % self.save_freq == 0:
self.save()
continue_learning = self.model.continue_learning()
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
else:
self.algorithm.setup(model=self.model, dataset=self.dataset)
self.setup_extensions()
if not hasattr(self.model, 'monitor'):
# TODO: is this really necessary? I just put this error here
# to prevent an AttributeError later, but I think we could
# rewrite to avoid the AttributeError
raise RuntimeError("The algorithm is responsible for setting"
" up the Monitor, but failed to.")
if len(self.model.monitor._datasets)>0:
# This monitoring channel keeps track of a shared variable,
# which does not need inputs nor data.
self.model.monitor.add_channel(name="monitor_seconds_per_epoch",
ipt=None,
val=self.monitor_time,
data_specs=(NullSpace(), ''),
dataset=self.model.monitor._datasets[0])
self.run_callbacks_and_monitoring()
while True:
with log_timing(log, None, final_msg='Time this epoch:',
callbacks=[self.monitor_time.set_value]):
import time
print 'current time', time.strftime("%H:%M:%S")
rval = self.algorithm.train(dataset=self.dataset)
if rval is not None:
raise ValueError("TrainingAlgorithm.train should not return anything. Use TrainingAlgorithm.continue_learning to control whether learning continues.")
self.model.monitor.report_epoch()
self.run_callbacks_and_monitoring()
if self.save_freq > 0 and self.model.monitor._epochs_seen % self.save_freq == 0:
self.save()
continue_learning = self.algorithm.continue_learning(self.model)
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
self.model.monitor.training_succeeded = True
if self.save_freq > 0:
self.save()
def main_loop(self):
"""
Repeatedly runs an epoch of the training algorithm, runs any
epoch-level callbacks, and saves the model.
"""
if self.algorithm is None:
self.model.monitor = Monitor.get_monitor(self.model)
self.setup_extensions()
self.run_callbacks_and_monitoring()
while True:
rval = self.model.train_all(dataset=self.dataset)
if rval is not None:
raise ValueError("Model.train_all should not return anything. Use Model.continue_learning to control whether learning continues.")
self.model.monitor.report_epoch()
if self.save_freq > 0 and self.model.monitor.epochs_seen % self.save_freq == 0:
self.save()
continue_learning = self.model.continue_learning()
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
else:
self.algorithm.setup(model=self.model, dataset=self.dataset)
self.setup_extensions()
if not hasattr(self.model, 'monitor'):
# TODO: is this really necessary? I just put this error here
# to prevent an AttributeError later, but I think we could
# rewrite to avoid the AttributeError
raise RuntimeError("The algorithm is responsible for setting"
" up the Monitor, but failed to.")
if len(self.model.monitor._datasets)>0:
# This monitoring channel keeps track of a shared variable,
# which does not need inputs nor data.
self.model.monitor.add_channel(name="monitor_seconds_per_epoch",
ipt=None,
val=self.monitor_time,
data_specs=(NullSpace(), ''),
dataset=self.model.monitor._datasets[0])
self.run_callbacks_and_monitoring()
while True:
with log_timing(log, None, final_msg='Time this epoch:',
callbacks=[self.monitor_time.set_value]):
rval = self.algorithm.train(dataset=self.dataset)
if rval is not None:
raise ValueError("TrainingAlgorithm.train should not return anything. Use TrainingAlgorithm.continue_learning to control whether learning continues.")
self.model.monitor.report_epoch()
self.run_callbacks_and_monitoring()
if self.save_freq > 0 and self.model.monitor._epochs_seen % self.save_freq == 0:
self.save()
continue_learning = self.algorithm.continue_learning(self.model)
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
self.model.monitor.training_succeeded = True
if self.save_freq > 0:
self.save()
def load_results(experiment_root):
# load the model (mlp_best.pkl)
model_file = os.path.join(experiment_root, 'mlp_best.pkl');
with log_timing(log, 'loading model from {}'.format(model_file)):
model = serial.load(model_file);
# load train
train_yaml_file = os.path.join(experiment_root, 'train.yaml');
train_yaml = load_yaml_template(train_yaml_file);
# fix dataset path
localizer = PathLocalizer();
train_yaml = localizer.localize_yaml(train_yaml);
with log_timing(log, 'loading train from {}'.format(train_yaml_file)):
train = load_yaml(train_yaml)[0];
return train, model;
def load_results(experiment_root):
# load the model (mlp_best.pkl)
model_file = os.path.join(experiment_root, 'mlp_best.pkl')
with log_timing(log, 'loading model from {}'.format(model_file)):
model = serial.load(model_file)
# load train
train_yaml_file = os.path.join(experiment_root, 'train.yaml')
train_yaml = load_yaml_template(train_yaml_file)
# fix dataset path
localizer = PathLocalizer()
train_yaml = localizer.localize_yaml(train_yaml)
with log_timing(log, 'loading train from {}'.format(train_yaml_file)):
train = load_yaml(train_yaml)[0]
return train, model
def train_mlp(params):
train, yaml_str = load_yaml_file(
os.path.join(os.path.dirname(__file__), 'cross_trial_template.yaml'),
params=params,
);
save_yaml_file(yaml_str, os.path.join(params.experiment_root, 'settings.yaml'));
with log_timing(log, 'training network'):
train.main_loop();
def extract_output(experiment_root):
train, model = load_results(experiment_root);
# get the datasets with their names from the monitor
for key, dataset in train.algorithm.monitoring_dataset.items():
# process each dataset
with log_timing(log, 'processing dataset \'{}\''.format(key)):
y_real, y_pred, output = process_dataset(model, dataset)
save(os.path.join(experiment_root, 'cache', key+'_output.pklz'), (y_real, y_pred, output));
def train_mlp(params):
train, yaml_str = load_yaml_file(
os.path.join(os.path.dirname(__file__), 'cross_trial_template.yaml'),
params=params,
)
save_yaml_file(yaml_str,
os.path.join(params.experiment_root, 'settings.yaml'))
with log_timing(log, 'training network'):
train.main_loop()
def __init__(self, filepath):
self.filepath = filepath
with log_timing(log, 'loading data from {}'.format(filepath)):
tmp = load(filepath)
if len(tmp) == 2:
self.data, self.metadata = tmp
self.targets = None
elif len(tmp) == 3:
self.data, self.metadata, self.targets = tmp
else:
raise ValueError('got {} objects instead of 2 or 3.'.format(len(tmp)))
def save_yaml_file(yaml_str, yaml_file_path):
if save_yaml_file is not None:
with log_timing(log, 'saving yaml to {}'.format(yaml_file_path)):
save_dir = os.path.dirname(yaml_file_path);
if save_dir == '':
save_dir = '.'
if not os.path.exists(save_dir):
os.makedirs(save_dir)
with open(yaml_file_path, 'w') as yaml_file:
yaml_file.write(yaml_str)
yaml_file.close();
def extract_output(experiment_root):
train, model = load_results(experiment_root)
# get the datasets with their names from the monitor
for key, dataset in train.algorithm.monitoring_dataset.items():
# process each dataset
with log_timing(log, 'processing dataset \'{}\''.format(key)):
y_real, y_pred, output = process_dataset(model, dataset)
save(os.path.join(experiment_root, 'cache', key + '_output.pklz'),
(y_real, y_pred, output))
def train_convnet(config):
train, yaml_str = load_yaml_file(
os.path.join(os.path.dirname(__file__), 'train_convnet_template.yaml'),
params=config,
);
save_yaml_file(yaml_str, os.path.join(config.experiment_root, 'settings.yaml'));
with log_timing(log, 'training network'):
train.main_loop();
def load_data_file(filename):
#data = np.loadtxt(filename, dtype=float, delimiter=' ', skiprows=1); #, autostrip=True, names=False)
with log_timing(log, 'loading data from {}'.format(filename)):
data = np.genfromtxt(filename, dtype=theano.config.floatX, delimiter=' ', skip_header=1, autostrip=True);
log.info('loaded {}'.format(data.shape));
# print data.shape;
# print data[0];
# print data[-1];
return data;
def load_data_file(filename):
#data = np.loadtxt(filename, dtype=float, delimiter=' ', skiprows=1); #, autostrip=True, names=False)
with log_timing(log, 'loading data from {}'.format(filename)):
data = np.genfromtxt(filename, dtype=theano.config.floatX, delimiter=' ', skip_header=1, autostrip=True);
log.info('loaded {}'.format(data.shape));
# print data.shape;
# print data[0];
# print data[-1];
return data;
def __init__(self, filepath):
self.filepath = filepath
with log_timing(log, 'loading data from {}'.format(filepath)):
tmp = load(filepath)
if len(tmp) == 2:
self.data, self.metadata = tmp
self.targets = None
elif len(tmp) == 3:
self.data, self.metadata, self.targets = tmp
else:
raise ValueError('got {} objects instead of 2 or 3.'.format(
len(tmp)))
def train_convnet(config):
train, yaml_str = load_yaml_file(
os.path.join(os.path.dirname(__file__), 'train_convnet_template.yaml'),
params=config,
)
save_yaml_file(yaml_str,
os.path.join(config.experiment_root, 'settings.yaml'))
with log_timing(log, 'training network'):
train.main_loop()
def load_yaml(yaml_template, params=None):
log.debug('params: {}'.format(params))
if params is not None:
yaml_str = yaml_template % params
else:
yaml_str = yaml_template
log.debug(yaml_str)
with log_timing(log, 'parsing yaml'):
obj = yaml_parse.load(yaml_str)
return obj, yaml_str
def load_yaml(yaml_template, params=None):
print params;
if params is not None:
yaml_str = yaml_template % params;
else:
yaml_str = yaml_template;
print yaml_str;
with log_timing(log, 'parsing yaml'):
obj = yaml_parse.load(yaml_str);
return obj, yaml_str;
def load_yaml(yaml_template, params=None):
log.debug('params: {}'.format(params))
if params is not None:
yaml_str = yaml_template % params
else:
yaml_str = yaml_template
log.debug(yaml_str)
with log_timing(log, 'parsing yaml'):
obj = yaml_parse.load(yaml_str)
return obj, yaml_str
def main_loop(self):
"""
Repeatedly runs an epoch of the training algorithm, runs any
epoch-level callbacks, and saves the model.
"""
if self.algorithm is None:
self.model.monitor = Monitor.get_monitor(self.model)
self.run_callbacks_and_monitoring()
while True:
rval = self.model.train_all(dataset=self.dataset)
if rval is not None:
raise ValueError(
"Model.train_all should not return anything. Use Model.continue_learning to control whether learning continues."
)
self.model.monitor.report_epoch()
if self.save_freq > 0 and self.model.monitor.epochs_seen % self.save_freq == 0:
self.save()
continue_learning = self.model.continue_learning()
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
else:
self.algorithm.setup(model=self.model, dataset=self.dataset)
if not hasattr(self.model, 'monitor'):
# TODO: is this really necessary? I just put this error here
# to prevent an AttributeError later, but I think we could
# rewrite to avoid the AttributeError
raise RuntimeError("The algorithm is responsible for setting"
" up the Monitor, but failed to.")
self.run_callbacks_and_monitoring()
while True:
with log_timing(log, None, final_msg='Time this epoch:'):
rval = self.algorithm.train(dataset=self.dataset)
if rval is not None:
raise ValueError(
"TrainingAlgorithm.train should not return anything. Use TrainingAlgorithm.continue_learning to control whether learning continues."
)
self.model.monitor.report_epoch()
self.run_callbacks_and_monitoring()
if self.save_freq > 0 and self.model.monitor._epochs_seen % self.save_freq == 0:
self.save()
continue_learning = self.algorithm.continue_learning(
self.model)
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
self.model.monitor.training_succeeded = True
if self.save_freq > 0:
self.save()
def main_loop(self):
"""
Repeatedly runs an epoch of the training algorithm, runs any
epoch-level callbacks, and saves the model.
"""
if self.algorithm is None:
self.model.monitor = Monitor.get_monitor(self.model)
self.setup_extensions()
self.run_callbacks_and_monitoring()
while True:
rval = self.model.train_all(dataset=self.dataset)
if rval is not None:
raise ValueError("Model.train_all should not return anything. Use Model.continue_learning to control whether learning continues.")
self.model.monitor.report_epoch()
if self.save_freq > 0 and self.model.monitor.epochs_seen % self.save_freq == 0:
self.save()
continue_learning = self.model.continue_learning()
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
else:
self.algorithm.setup(model=self.model, dataset=self.dataset)
self.setup_extensions()
if not hasattr(self.model, 'monitor'):
# TODO: is this really necessary? I just put this error here
# to prevent an AttributeError later, but I think we could
# rewrite to avoid the AttributeError
raise RuntimeError("The algorithm is responsible for setting"
" up the Monitor, but failed to.")
self.run_callbacks_and_monitoring()
while True:
with log_timing(log, None, final_msg='Time this epoch:'):
rval = self.algorithm.train(dataset=self.dataset)
if rval is not None:
raise ValueError("TrainingAlgorithm.train should not return anything. Use TrainingAlgorithm.continue_learning to control whether learning continues.")
self.model.monitor.report_epoch()
self.run_callbacks_and_monitoring()
if self.save_freq > 0 and self.model.monitor._epochs_seen % self.save_freq == 0:
self.save()
continue_learning = self.algorithm.continue_learning(self.model)
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
self.model.monitor.training_succeeded = True
if self.save_freq > 0:
self.save()
def __init__(self, save_dir):
PYLEARN2_TRAIN_DIR = preprocess('${PYLEARN2_TRAIN_DIR}')
PYLEARN2_TRAIN_BASE_NAME = preprocess('${PYLEARN2_TRAIN_BASE_NAME}')
src = os.path.join(PYLEARN2_TRAIN_DIR, PYLEARN2_TRAIN_BASE_NAME)
dst = os.path.join(save_dir, PYLEARN2_TRAIN_BASE_NAME)
if not os.path.exists(save_dir):
os.makedirs(save_dir)
if os.path.exists(save_dir) and not os.path.isdir(save_dir):
raise IOError("save path %s exists, not a directory" % save_dir)
elif not os.access(save_dir, os.W_OK):
raise IOError("permission error creating %s" % dst)
with log_timing(log, 'copying yaml from {} to {}'.format(src, dst)):
copyfile(src, dst)
def __init__(self, save_dir):
PYLEARN2_TRAIN_DIR = preprocess('${PYLEARN2_TRAIN_DIR}')
PYLEARN2_TRAIN_BASE_NAME = preprocess('${PYLEARN2_TRAIN_BASE_NAME}')
src = os.path.join(PYLEARN2_TRAIN_DIR, PYLEARN2_TRAIN_BASE_NAME)
dst = os.path.join(save_dir, PYLEARN2_TRAIN_BASE_NAME)
if not os.path.exists(save_dir):
os.makedirs(save_dir)
if os.path.exists(save_dir) and not os.path.isdir(save_dir):
raise IOError("save path %s exists, not a directory" % save_dir)
elif not os.access(save_dir, os.W_OK):
raise IOError("permission error creating %s" % dst)
with log_timing(log, 'copying yaml from {} to {}'.format(src, dst)):
copyfile(src, dst)
def run_one_epoch(self, datasets, remember_best):
batch_generator = self.iterator.get_batches(datasets['train'],
shuffle=True)
with log_timing(log, None, final_msg='Time updates following epoch:'):
for inputs, targets in batch_generator:
if self.batch_modifier is not None:
inputs, targets = self.batch_modifier.process(
inputs, targets)
# could happen that batch modifier has removed all inputs...
if len(inputs) > 0:
self.train_func(inputs, targets)
self.monitor_epoch(datasets)
self.print_epoch()
if remember_best:
self.remember_extension.remember_epoch(self.monitor_chans,
self.all_params)
def run_one_epoch(self, datasets, remember_best):
batch_generator = self.iterator.get_batches(datasets['train'],
shuffle=True)
with log_timing(log, None, final_msg='Time updates following epoch:'):
for inputs, targets in batch_generator:
if self.batch_modifier is not None:
inputs, targets = self.batch_modifier.process(inputs,
targets)
# could happen that batch modifier has removed all inputs...
if len(inputs) > 0:
self.train_func(inputs, targets)
self.monitor_epoch(datasets)
self.print_epoch()
if remember_best:
self.remember_extension.remember_epoch(self.monitor_chans,
self.all_params)
def train_mlp(params):
# sda_file = os.path.join(params.experiment_root, 'sda', 'sda_all.pkl');
# check whether pre-trained SDA is there
pretrained = True
for i in xrange(len(params.hidden_layers_sizes)):
sda_layer_file = params.get(('layer{}_content').format(i))
if not os.path.isfile(sda_layer_file):
log.info(
'did not find pre-trained SDA layer model at {}. re-computing SDA'
.format(sda_layer_file))
pretrained = False
break
else:
log.info('found pre-trained SDA layer model at {}'.format(
sda_layer_file))
if not pretrained:
train_sda(params)
n_layers = len(params.hidden_layers_sizes)
if params.learning_rule == 'AdaDelta':
yaml_template = 'train_sda_mlp_template.AdaDelta.yaml'
else:
if n_layers == 3:
yaml_template = 'train_sda_mlp_template.Momentum.yaml'
elif n_layers == 2:
yaml_template = 'train_sda_mlp_template.Momentum.2layers.yaml'
else:
raise '{} layers not supported'.format(n_layers)
train, train_yaml_str = load_yaml_file(
os.path.join(os.path.dirname(__file__), yaml_template),
params=params,
)
save_yaml_file(train_yaml_str,
os.path.join(params.experiment_root, 'mlp_train.yaml'))
with log_timing(log, 'training MLP'):
train.main_loop()
log.info('done')
def save(self):
"""Saves the model."""
# TODO-- save state of training algorithm so training can be
# resumed after a crash
for extension in self.extensions:
extension.on_save(self.model, self.dataset, self.algorithm)
if self.save_path is not None:
with log_timing(log, "Saving to " + self.save_path):
if self.first_save and (not self.allow_overwrite) and os.path.exists(self.save_path):
# Every job overwrites its own output on the second save
# and every save thereafter. The "allow_overwrite" flag
# only pertains to overwriting the output of previous jobs.
raise IOError("Trying to overwrite file when not allowed.")
try:
# Make sure that saving does not serialize the dataset
self.dataset._serialization_guard = SerializationGuard()
serial.save(self.save_path, self.model, on_overwrite="backup")
finally:
self.dataset._serialization_guard = None
self.first_save = False
def train_mlp(params):
# sda_file = os.path.join(params.experiment_root, 'sda', 'sda_all.pkl');
# check whether pre-trained SDA is there
pretrained = True;
for i in xrange(len(params.hidden_layers_sizes)):
sda_layer_file = params.get(('layer{}_content').format(i));
if not os.path.isfile(sda_layer_file):
log.info('did not find pre-trained SDA layer model at {}. re-computing SDA'.format(sda_layer_file));
pretrained = False;
break;
else:
log.info('found pre-trained SDA layer model at {}'.format(sda_layer_file));
if not pretrained:
train_sda(params);
n_layers = len(params.hidden_layers_sizes);
if params.learning_rule == 'AdaDelta':
yaml_template = 'train_sda_mlp_template.AdaDelta.yaml'
else:
if n_layers == 3:
yaml_template = 'train_sda_mlp_template.Momentum.yaml'
elif n_layers == 2:
yaml_template = 'train_sda_mlp_template.Momentum.2layers.yaml'
else:
raise '{} layers not supported'.format(n_layers);
train, train_yaml_str = load_yaml_file(
os.path.join(os.path.dirname(__file__), yaml_template),
params=params,
);
save_yaml_file(train_yaml_str, os.path.join(params.experiment_root, 'mlp_train.yaml'));
with log_timing(log, 'training MLP'):
train.main_loop();
log.info('done');
def save(self):
"""Saves the model."""
#TODO-- save state of training algorithm so training can be
# resumed after a crash
for extension in self.extensions:
extension.on_save(self.model, self.dataset, self.algorithm)
if self.save_path is not None:
with log_timing(log, 'Saving to ' + self.save_path):
if self.first_save and (not self.allow_overwrite) \
and os.path.exists(self.save_path):
# Every job overwrites its own output on the second save
# and every save thereafter. The "allow_overwrite" flag
# only pertains to overwriting the output of previous jobs.
raise IOError("Trying to overwrite file when not allowed.")
try:
# Make sure that saving does not serialize the dataset
self.dataset._serialization_guard = SerializationGuard()
serial.save(self.save_path, self.model,
on_overwrite='backup')
finally:
self.dataset._serialization_guard = None
self.first_save = False
def split_trial(path, trial_len):
log.info('processing {}'.format(path))
datafile = glob.glob(os.path.join(path, '*.txt'))[0]
metafile = glob.glob(os.path.join(path, '*_Trials_Onsets.xlsx'))[0]
log.debug('data file: {}'.format(datafile))
log.debug('meta file: {}'.format(metafile))
onsets = load_xlsx_meta_file(metafile)
data = load_data_file(datafile)
log.debug(onsets)
onsets.append([len(data), 'end'])
# artificial last marker
trials = {}
for i in xrange(len(onsets) - 1):
onset, label = onsets[i]
next_onset = onsets[i + 1][0]
# rounding to integers
onset = int(math.floor(float(onset)))
next_onset = int(math.floor(float(next_onset)))
next_onset = min(onset + trial_len, next_onset)
log.debug('[{}..{}) -> {}'.format(onset, next_onset, label))
trial_data = np.vstack(data[onset:next_onset])
log.debug('{} samples extracted'.format(trial_data.shape))
trials[label] = trial_data
filename = os.path.join(path, 'trials.pklz')
with log_timing(log, 'saving to {}'.format(filename)):
save(filename, trials)
return trials
def extract_output(config, best_epoch):
# load best model
model_file = os.path.join(config.experiment_root, "epochs", "epoch{}.pkl".format(best_epoch))
print "loading " + model_file
model = serial.load(model_file)
# print model;
# additional dataset params
config.start_sample = 11200
config.stop_sample = 12800
config.name = "test"
# load dataset
dataset, dataset_yaml = load_yaml_file(
os.path.join(os.path.dirname(__file__), "..", "run", "dataset_template.yaml"), params=config
)
with log_timing(log, "processing dataset"):
y_real, y_pred, output = process_dataset(model, dataset)
return y_real, y_pred, output
def split_trial(path, trial_len):
log.info('processing {}'.format(path));
datafile = glob.glob(os.path.join(path,'*.txt'))[0];
metafile = glob.glob(os.path.join(path,'*_Trials_Onsets.xlsx'))[0];
log.debug('data file: {}'.format(datafile));
log.debug('meta file: {}'.format(metafile));
onsets = load_xlsx_meta_file(metafile);
data = load_data_file(datafile);
log.debug(onsets);
onsets.append([len(data), 'end']); # artificial last marker
trials = {};
for i in xrange(len(onsets) - 1):
onset, label = onsets[i];
next_onset = onsets[i+1][0];
# rounding to integers
onset = int(math.floor(float(onset)));
next_onset = int(math.floor(float(next_onset)));
next_onset = min(onset+trial_len, next_onset);
log.debug('[{}..{}) -> {}'.format(onset, next_onset, label));
trial_data = np.vstack(data[onset:next_onset]);
log.debug('{} samples extracted'.format(trial_data.shape));
trials[label] = trial_data;
filename = os.path.join(path, 'trials.pklz');
with log_timing(log, 'saving to {}'.format(filename)):
save(filename, trials);
return trials;
def extract_output(config, best_epoch):
# load best model
model_file = os.path.join(config.experiment_root, 'epochs', 'epoch{}.pkl'.format(best_epoch));
print 'loading '+model_file;
model = serial.load(model_file);
# print model;
# additional dataset params
config.start_sample = 11200;
config.stop_sample = 12800;
config.name = 'test';
# load dataset
dataset, dataset_yaml = load_yaml_file(
os.path.join(os.path.dirname(__file__), '..', 'run', 'dataset_template.yaml'),
params=config,
);
with log_timing(log, 'processing dataset'):
y_real, y_pred, output = process_dataset(model, dataset)
return y_real, y_pred, output;
def process_markers(self, markers):
# Check if a trial has ended with last samples
# need marker samples with some overlap
# so we do not miss trial boundaries inbetween two sample blocks
marker_samples_with_overlap = np.copy(
self.marker_buffer[-len(markers)-2:])
trial_has_ended = np.sum(np.diff(marker_samples_with_overlap) < 0) > 0
if trial_has_ended:
trial_starts, trial_stops = self.get_trial_start_stop_indices(
self.marker_buffer)
trial_start = trial_starts[-1]
trial_stop = trial_stops[-1]
log.info("Trial has ended for class {:d}".format(
self.marker_buffer[trial_start]))
assert trial_start < trial_stop, ("trial start {:d} should be "
"before trial stop {:d}, markers: {:s}").format(trial_start,
trial_stop, str(marker_samples_with_overlap))
self.add_blocks(trial_start + self.trial_start_offset, trial_stop,
self.data_processor.sample_buffer,
self.marker_buffer)
log.info("Now {:d} trials (including breaks)".format(
len(self.data_batches)))
with log_timing(log, None, final_msg='Time for training:'):
self.train()
trial_has_started = np.sum(np.diff(marker_samples_with_overlap) > 0) > 0
if trial_has_started:
trial_end_in_marker_buffer = np.sum(np.diff(self.marker_buffer) < 0) > 0
if trial_end_in_marker_buffer:
# +1 necessary since diff removes one index
trial_start = np.flatnonzero(np.diff(self.marker_buffer) > 0)[-1] + 1
trial_stop = np.flatnonzero(np.diff(self.marker_buffer) < 0)[-1] + 1
assert trial_start > trial_stop, ("If trial has just started "
"expect this to be after stop of last trial")
self.add_break(break_start=trial_stop, break_stop=trial_start,
all_samples=self.data_processor.sample_buffer,
all_markers=self.marker_buffer)
def main_loop(self, time_budget=None):
"""
Repeatedly runs an epoch of the training algorithm, runs any
epoch-level callbacks, and saves the model.
Parameters
----------
time_budget : int, optional
The maximum number of seconds before interrupting
training. Default is `None`, no time limit.
"""
t0 = datetime.now()
self.setup()
if self.algorithm is None:
self.run_callbacks_and_monitoring()
while True:
if self.exceeded_time_budget(t0, time_budget):
break
rval = self.model.train_all(dataset=self.dataset)
if rval is not None:
raise ValueError("Model.train_all should not return " +
"anything. Use Model.continue_learning " +
"to control whether learning continues.")
self.model.monitor.report_epoch()
extension_continue = self.run_callbacks_and_monitoring()
freq = self.save_freq
if freq > 0 and self.model.monitor.get_epochs_seen() % freq == 0:
self.save()
continue_learning = (self.model.continue_learning() and
extension_continue)
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
else:
if not hasattr(self.model, 'monitor'):
# TODO: is this really necessary? I just put this error here
# to prevent an AttributeError later, but I think we could
# rewrite to avoid the AttributeError
raise RuntimeError("The algorithm is responsible for setting"
" up the Monitor, but failed to.")
if len(self.model.monitor._datasets) > 0:
# This monitoring channel keeps track of a shared variable,
# which does not need inputs nor data.
self.training_seconds.__doc__ = """\
The number of seconds that were spent in actual training during the most
recent epoch. This excludes seconds that were spent running callbacks for
the extensions, computing monitoring channels, etc."""
self.model.monitor.add_channel(
name="training_seconds_this_epoch",
ipt=None,
val=self.training_seconds,
data_specs=(NullSpace(), ''),
dataset=self.model.monitor._datasets[0])
self.total_seconds.__doc__ = """\
The number of seconds that were spent on the entirety of processing for the
previous epoch. This includes not only training but also the computation of
the monitoring channels, running TrainExtension callbacks, etc. This value
is reported for the *previous* epoch because the amount of time spent on
monitoring for this epoch is not known until the monitoring channels have
already been reported."""
self.model.monitor.add_channel(
name="total_seconds_last_epoch",
ipt=None,
val=self.total_seconds,
data_specs=(NullSpace(), ''),
dataset=self.model.monitor._datasets[0])
self.run_callbacks_and_monitoring()
while True:
if self.exceeded_time_budget(t0, time_budget):
break
with log_timing(log, None, level=logging.DEBUG,
callbacks=[self.total_seconds.set_value]):
with log_timing(
log, None, final_msg='Time this epoch:',
callbacks=[self.training_seconds.set_value]):
rval = self.algorithm.train(dataset=self.dataset)
if rval is not None:
raise ValueError("TrainingAlgorithm.train should not "
"return anything. Use "
"TrainingAlgorithm.continue_learning "
"to control whether learning "
"continues.")
self.model.monitor.report_epoch()
extension_continue = self.run_callbacks_and_monitoring()
if self.save_freq > 0 and \
self.model.monitor.get_epochs_seen() % self.save_freq == 0:
self.save()
continue_learning = (
self.algorithm.continue_learning(self.model) and
extension_continue
)
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
self.model.monitor.training_succeeded = True
if self.save_freq > 0:
self.save()
def main_loop(self, time_budget=None):
"""
Repeatedly runs an epoch of the training algorithm, runs any
epoch-level callbacks, and saves the model.
Parameters
----------
time_budget : int, optional
The maximum number of seconds before interrupting
training. Default is `None`, no time limit.
"""
t0 = datetime.now()
if self.algorithm is None:
self.model.monitor = Monitor.get_monitor(self.model)
self.model.monitor.time_budget_exceeded = False
self.setup_extensions()
# Model.censor_updates is used by the training algorithm to
# enforce constraints after each step of learning. Here we
# make sure the constraints are enforced from the start.
self.model.enforce_constraints()
self.run_callbacks_and_monitoring()
while True:
if self.exceeded_time_budget(t0, time_budget):
break
rval = self.model.train_all(dataset=self.dataset)
if rval is not None:
raise ValueError("Model.train_all should not return " +
"anything. Use Model.continue_learning " +
"to control whether learning continues.")
self.model.monitor.report_epoch()
extension_continue = self.run_callbacks_and_monitoring()
freq = self.save_freq
if freq > 0 and self.model.monitor.epochs_seen % freq == 0:
self.save()
continue_learning = (self.model.continue_learning() and
extension_continue)
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
else:
self.algorithm.setup(model=self.model, dataset=self.dataset)
self.setup_extensions()
# Model.censor_updates is used by the training algorithm to
# enforce constraints after each step of learning. Here we
# make sure the constraints are enforced from the start.
self.model.enforce_constraints()
if not hasattr(self.model, 'monitor'):
# TODO: is this really necessary? I just put this error here
# to prevent an AttributeError later, but I think we could
# rewrite to avoid the AttributeError
raise RuntimeError("The algorithm is responsible for setting"
" up the Monitor, but failed to.")
if len(self.model.monitor._datasets)>0:
# This monitoring channel keeps track of a shared variable,
# which does not need inputs nor data.
self.model.monitor.add_channel(name="training_seconds_this_epoch",
ipt=None,
val=self.training_seconds,
data_specs=(NullSpace(), ''),
dataset=self.model.monitor._datasets[0])
self.model.monitor.add_channel(name="total_seconds_last_epoch",
ipt=None,
val=self.total_seconds,
data_specs=(NullSpace(), ''),
dataset=self.model.monitor._datasets[0])
self.run_callbacks_and_monitoring()
while True:
if self.exceeded_time_budget(t0, time_budget):
break
with log_timing(log, None, level=logging.DEBUG,
callbacks=[self.total_seconds.set_value]):
with log_timing(log, None, final_msg='Time this epoch:',
callbacks=[self.training_seconds.set_value]):
rval = self.algorithm.train(dataset=self.dataset)
if rval is not None:
raise ValueError("TrainingAlgorithm.train should not " +
"return anything. Use " +
"TrainingAlgorithm.continue_learning " +
"to control whether learning continues.")
self.model.monitor.report_epoch()
extension_continue = self.run_callbacks_and_monitoring()
if self.save_freq > 0 and self.model.monitor._epochs_seen % self.save_freq == 0:
self.save()
continue_learning = (
self.algorithm.continue_learning(self.model) and
extension_continue
)
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
self.model.monitor.training_succeeded = True
if self.save_freq > 0:
self.save()
def redo_theano(self):
"""
Recompiles Theano functions used by this monitor.
This is needed so that if new channels are added, Theano's
optimizations make sure (to the extent that they can) that the new
channels and old channels don't have any redundant calculations.
It is also needed to regenerate Theano functions after pickling and
unpickling, since Theano functions should not be pickled.
"""
self._dirty = False
init_names = dir(self)
self.prereqs = OrderedDict()
for channel in self.channels.values():
if channel.prereqs is not None:
dataset = channel.dataset
if dataset not in self.prereqs:
self.prereqs[dataset] = []
prereqs = self.prereqs[dataset]
for prereq in channel.prereqs:
if prereq not in prereqs:
prereqs.append(prereq)
updates = OrderedDict()
for channel in self.channels.values():
updates[channel.val_shared] = np.cast[config.floatX](0.0)
with log_timing(log, "compiling begin_record_entry"):
self.begin_record_entry = function(inputs=[], updates=updates, mode=self.theano_function_mode,
name = 'Monitor.begin_record_entry')
updates = OrderedDict()
givens = OrderedDict()
#Get the appropriate kind of theano variable to represent the data the model
#acts on
X = self.model.get_input_space().make_theano_batch(name = "monitoring_X")
if config.compute_test_value != 'off':
m = self.model.get_test_batch_size()
test_value = self.model.get_input_space().get_origin_batch(m)
X.tag.test_value = np.cast[X.type.dtype](test_value)
if self.require_label:
Y = self.model.get_output_space().make_theano_batch(name = "monitoring_Y")
log.info('Monitored channels: ')
for key in sorted(self.channels.keys()):
mode = self.theano_function_mode
if mode is not None and hasattr(mode, 'record'):
mode.record.handle_line('compiling monitor including channel '+key+'\n')
log.info('\t%s' % key)
it = [d.iterator(mode=i, num_batches=n, batch_size=b, topo=self.topo) \
for d, i, n, b in safe_izip(self._datasets, self._iteration_mode,
self._num_batches, self._batch_size)]
num_examples = [np.cast[config.floatX](float(i.num_examples)) for i in it]
givens = [OrderedDict() for d in self._datasets]
updates = [OrderedDict() for d in self._datasets]
for channel in self.channels.values():
index = self._datasets.index(channel.dataset)
d = self._datasets[index]
g = givens[index]
n = num_examples[index]
u = updates[index]
if isinstance(channel.graph_input, (list, tuple)):
g[channel.graph_input[0]] = X
g[channel.graph_input[1]] = Y
else:
g[channel.graph_input] = X
if n == 0:
raise ValueError("Iterating over 0 examples results in divide by 0")
if self.topo:
batch_index = d.get_topo_batch_axis()
else:
batch_index = 0
val = channel.val * T.cast(X.shape[batch_index], config.floatX) / n
u[channel.val_shared] = channel.val_shared + val
with log_timing(log, "Compiling accum"):
# Check type of update expressions
for up in updates:
for key in up:
if key.dtype != up[key].dtype:
raise TypeError('Monitoring channel shared variable ' \
+ key.name + ' has dtype ' + key.dtype + \
' but is driven by an expression with type ' + \
up[key].dtype)
self.accum = []
for idx, packed in enumerate(safe_izip(givens, updates)):
g, u = packed
mode = self.theano_function_mode
if mode is not None and hasattr(mode, 'record'):
for elem in g:
mode.record.handle_line('g key '+var_descriptor(elem)+'\n')
mode.record.handle_line('g val '+var_descriptor(g[elem])+'\n')
for elem in u:
mode.record.handle_line('u key '+var_descriptor(elem)+'\n')
mode.record.handle_line('u val '+var_descriptor(u[elem])+'\n')
function_name = 'Monitor.accum[%d]' % idx
if self.require_label:
if mode is not None and hasattr(mode, 'record'):
mode.record.handle_line('compiling supervised accum\n')
# Some channels may not depend on the data, ie, they might just monitor the model
# parameters, or some shared variable updated by the training algorithm, so we
# need to ignore the unused input error
self.accum.append(function([X, Y], givens=g, updates=u, mode=self.theano_function_mode,
name=function_name))
else:
if mode is not None and hasattr(mode, 'record'):
mode.record.handle_line('compiling unsupervised accum\n')
self.accum.append(function([X], givens=g, updates=u, mode=self.theano_function_mode,
name=function_name))
for a in self.accum:
if mode is not None and hasattr(mode, 'record'):
for elem in a.maker.fgraph.outputs:
mode.record.handle_line('accum output '+var_descriptor(elem)+'\n')
log.info("graph size: %d" % len(a.maker.fgraph.toposort()))
final_names = dir(self)
self.register_names_to_del([name for name in final_names
if name not in init_names])
def redo_theano(self):
"""
Recompiles Theano functions used by this monitor.
This is called any time we need to evaluate the channels and the
channel definitions have changed since last we called it, or if the
theano functions are unavailable for any other reason (first time they
are needed after construction or deserialization, etc.)
All channels are compiled as part of the same theano function so that
the theano optimizations can eliminate subexpressions that are shared
between multiple channels.
"""
self._dirty = False
# Recompute the data specs, since the channels may have changed.
self._build_data_specs()
init_names = dir(self)
self.prereqs = OrderedDict()
for channel in self.channels.values():
if channel.prereqs is not None:
dataset = channel.dataset
if dataset not in self.prereqs:
self.prereqs[dataset] = []
prereqs = self.prereqs[dataset]
for prereq in channel.prereqs:
if prereq not in prereqs:
prereqs.append(prereq)
updates = OrderedDict()
for channel in self.channels.values():
updates[channel.val_shared] = np.cast[config.floatX](0.0)
with log_timing(log, "compiling begin_record_entry"):
self.begin_record_entry = function(
inputs=[],
updates=updates,
mode=self.theano_function_mode,
name='Monitor.begin_record_entry')
updates = OrderedDict()
givens = OrderedDict()
# Get the appropriate kind of theano variable to represent the data
# the model acts on
batch_names = ['monitoring_%s' % s for s in self._flat_data_specs[1]]
theano_args = self._flat_data_specs[0].make_theano_batch(batch_names)
# Get a symbolic expression of the batch size
# We do it here, rather than for each channel, because channels with an
# empty data_specs do not use data, and are unable to extract the batch
# size. The case where the whole data specs is empty is not supported.
batch_size = self._flat_data_specs[0].batch_size(theano_args)
# Also get a nested representation, for joint iteration
# with each of channel.graph_input
nested_theano_args = self._data_specs_mapping.nest(theano_args)
if not isinstance(nested_theano_args, tuple):
nested_theano_args = (nested_theano_args, )
assert len(nested_theano_args) == (len(self.channels) + 1)
log.info('Monitored channels: ')
for key in sorted(self.channels.keys()):
mode = self.theano_function_mode
if mode is not None and hasattr(mode, 'record'):
mode.record.handle_line('compiling monitor including ' +
'channel ' + key + '\n')
log.info('\t%s' % key)
it = [
d.iterator(mode=i,
num_batches=n,
batch_size=b,
data_specs=self._flat_data_specs,
return_tuple=True)
for d, i, n, b in safe_izip(self._datasets, self._iteration_mode,
self._num_batches, self._batch_size)
]
self.num_examples = [
np.cast[config.floatX](float(i.num_examples)) for i in it
]
givens = [OrderedDict() for d in self._datasets]
updates = [OrderedDict() for d in self._datasets]
for i, channel in enumerate(self.channels.values()):
index = self._datasets.index(channel.dataset)
d = self._datasets[index]
g = givens[index]
cur_num_examples = self.num_examples[index]
u = updates[index]
# Flatten channel.graph_input and the appropriate part of
# nested_theano_args, to iterate jointly over them.
c_mapping = DataSpecsMapping(channel.data_specs)
channel_inputs = c_mapping.flatten(channel.graph_input,
return_tuple=True)
inputs = c_mapping.flatten(nested_theano_args[i + 1],
return_tuple=True)
for (channel_X, X) in safe_izip(channel_inputs, inputs):
assert channel_X not in g or g[channel_X] is X
assert channel_X.type == X.type, (channel_X.type, X.type)
g[channel_X] = X
if batch_size == 0:
# No channel does need any data, so there is not need to
# average results, and we will call the accum functions only
# once.
# TODO: better handling of channels not needing data when
# some other channels need data.
assert len(self._flat_data_specs[1]) == 0
val = channel.val
else:
if n == 0:
raise ValueError("Iterating over 0 examples results in " +
"divide by 0")
val = (channel.val * T.cast(batch_size, config.floatX) /
cur_num_examples)
u[channel.val_shared] = channel.val_shared + val
with log_timing(log, "Compiling accum"):
# Check type of update expressions
for up in updates:
for key in up:
if key.dtype != up[key].dtype:
raise TypeError('Monitoring channel shared variable ' +
key.name + ' has dtype ' + key.dtype +
' but is driven by an expression ' +
'with type ' + up[key].dtype)
self.accum = []
for idx, packed in enumerate(safe_izip(givens, updates)):
g, u = packed
mode = self.theano_function_mode
if mode is not None and hasattr(mode, 'record'):
for elem in g:
mode.record.handle_line('g key ' +
var_descriptor(elem) + '\n')
mode.record.handle_line('g val ' +
var_descriptor(g[elem]) + '\n')
for elem in u:
mode.record.handle_line('u key ' +
var_descriptor(elem) + '\n')
mode.record.handle_line('u val ' +
var_descriptor(u[elem]) + '\n')
function_name = 'Monitor.accum[%d]' % idx
if mode is not None and hasattr(mode, 'record'):
mode.record.handle_line('compiling supervised accum\n')
# Some channels may not depend on the data, ie, they might just
# monitor the model parameters, or some shared variable updated
# by the training algorithm, so we need to ignore the unused
# input error
self.accum.append(
function(theano_args,
givens=g,
updates=u,
mode=self.theano_function_mode,
name=function_name))
for a in self.accum:
if mode is not None and hasattr(mode, 'record'):
for elem in a.maker.fgraph.outputs:
mode.record.handle_line('accum output ' +
var_descriptor(elem) + '\n')
log.info("graph size: %d" % len(a.maker.fgraph.toposort()))
final_names = dir(self)
self.register_names_to_del(
[name for name in final_names if name not in init_names])
def analyze(config):
output_path = config.get('output_path');
# model_file = os.path.join(output_path, 'eeg', 'conv3', 'convolutional_network.pkl');
# model_file = os.path.join(output_path, 'eeg', 'conv10', 'epochs', 'cnn_epoch94.pkl');
model_file = '../../../debug/debug_run4/debug_network.pkl';
with log_timing(log, 'loading convnet model from {}'.format(model_file)):
model = serial.load(model_file);
input_shape = model.get_input_space().shape;
config = config.eeg;
hyper_params = {
'input_length':input_shape[0], #25+151-1+301-1, # this should leave a single value per channel after convolution
'hop_size':5, # reduce amount of data by factor 5
'dataset_root': config.get('dataset_root'),
'dataset_suffix': config.get('dataset_suffix'),
'save_path': config.get('save_path'),
}
dataset_yaml = '''
!obj:deepthought.datasets.rwanda2013rhythms.EEGDataset.EEGDataset {
name : 'testset',
path : %(dataset_root)s,
suffix : '_channels', # %(dataset_suffix)s,
subjects : [0],
resample : [400, 100],
start_sample : 2500,
stop_sample : 3200, # None (empty) = end of sequence
# FIXME:
# n_fft : 24,
# frame_size : 10, # %(input_length)i,
frame_size : %(input_length)i,
hop_size : %(hop_size)i,
label_mode : 'rhythm_type',
# save_matrix_path: '../../../debug/debug.pkl'
}
'''
dataset_yaml = dataset_yaml % hyper_params;
print dataset_yaml;
with log_timing(log, 'parsing yaml'):
testset = yaml_parse.load(dataset_yaml);
# print testset.subject_partitions;
# print testset.sequence_partitions;
seq_starts = testset.sequence_partitions;
# return;
# axes=['b', 0, 1, 'c']
# def dimshuffle(b01c):
# default = ('b', 0, 1, 'c')
# return b01c.transpose(*[default.index(axis) for axis in axes])
# data = dimshuffle(testset.X);
# design_matrix = model.get_design_matrix()
# view_converter = DefaultViewConverter([475, 1, 1]);
# data = view_converter.
# ## get the labels
# data_specs= (model.get_output_space(), "targets");
# it = testset.iterator(
# mode='sequential',
# batch_size=100,
# data_specs=data_specs);
# labels = np.hstack([np.argmax(minibatch, axis = 1) for minibatch in it])
# print labels[0:1000]
#
# ## get the predictions
# minibatch = model.get_input_space().make_theano_batch();
# output_fn = theano.function(inputs=[minibatch],
# outputs=T.argmax(model.fprop(minibatch), axis = 1));
# print "function compiled"
# # data_specs= (CompositeSpace((
# # model.get_input_space(),
# # model.get_output_space())),
# # ("features", "targets"));
#
# data_specs= (model.get_input_space(), "features");
# it = testset.iterator(
# mode='sequential',
# batch_size=100,
# data_specs=data_specs);
# print "iterator ready"
#
# y_pred = np.hstack([output_fn(minibatch) for minibatch in it])
#
# print y_pred[0:1000]
minibatch = model.get_input_space().make_theano_batch();
output_fn = theano.function(inputs=[minibatch],
outputs=T.argmax(model.fprop(minibatch), axis = 1));
print "function compiled"
data_specs= (CompositeSpace((
model.get_input_space(),
model.get_output_space())),
("features", "targets"));
it = testset.iterator('sequential',
batch_size=100,
data_specs=data_specs);
print "iterator ready"
y_pred = [];
y_real = [];
for minibatch, target in it:
y_pred.append(output_fn(minibatch));
y_real.append(np.argmax(target, axis = 1));
y_pred = np.hstack(y_pred);
y_real = np.hstack(y_real);
print y_pred[0:1000]
print classification_report(y_real, y_pred);
print confusion_matrix(y_real, y_pred);
misclass = (y_real != y_pred);
print misclass.mean();
correct = 0;
s_real = [];
s_pred = [];
s_pred_agg = [];
n_channels = 16;
channel_scores = np.zeros(n_channels, dtype=np.int);
for i in xrange(len(seq_starts)):
start = seq_starts[i];
if i < len(seq_starts) - 1:
stop = seq_starts[i+1];
else:
stop = None;
s_real.append(y_real[start]);
# print np.bincount(y_pred[start:stop]);
# print np.argmax(np.bincount(y_pred[start:stop]));
s_pred.append(np.argmax(np.bincount(y_pred[start:stop])));
s_pred_agg.append(np.mean(y_pred[start:stop])); # works only for binary classification
seq_misclass = misclass[start:stop].mean();
# print '{} [{}{}]: {}'.format(i, start, stop, seq_misclass);
if seq_misclass < 0.5: # more correct than incorrect
correct += 1;
channel_scores[i%n_channels] += 1;
s_real = np.hstack(s_real);
s_pred = np.hstack(s_pred);
print s_real;
print s_pred;
print s_pred_agg;
print 'aggregated'
print classification_report(s_real, s_pred);
print confusion_matrix(s_real, s_pred);
s_misclass = (s_real != s_pred);
print s_misclass.mean();
print channel_scores;
return;
input_shape = model.get_input_space().shape;
print input_shape
view_converter = DefaultViewConverter((input_shape[0], input_shape[1], 1));
data = view_converter.design_mat_to_topo_view(testset.X);
print data.shape;
X = model.get_input_space().make_theano_batch()
Y = model.fprop( X )
Y = T.argmax( Y, axis = 1 ) # needed - otherwise not single value
output_fn = theano.function( [X], Y );
# y_pred = output_fn( data );
batch_size = 1000;
y_pred = [];
batch_start = 0;
while batch_start < data.shape[0]:
batch_stop = min(data.shape[0], batch_start + batch_size);
y_pred.append(output_fn( data[batch_start:batch_stop] ));
# if batch_start == 0: print y_pred;
batch_start = batch_stop;
y_pred = np.hstack(y_pred);
print testset.labels[0:1000]
print y_pred[0:1000]
print classification_report(testset.labels, y_pred);
print confusion_matrix(testset.labels, y_pred);
labels = np.argmax(testset.y, axis=1)
print classification_report(labels, y_pred);
print confusion_matrix(labels, y_pred);
labels = np.argmax(testset.y, axis=1)
print classification_report(labels, y_pred);
print confusion_matrix(labels, y_pred);
misclass = (labels != y_pred).mean()
print misclass
# # alternative version from KeepBestParams
# minibatch = T.matrix('minibatch')
# output_fn = theano.function(inputs=[minibatch],outputs=T.argmax( model.fprop(minibatch), axis = 1 ));
# it = testset.iterator('sequential', batch_size=batch_size, targets=False);
# y_pred = [output_fn(mbatch) for mbatch in it];
# y_hat = T.argmax(state, axis=1)
# y = T.argmax(target, axis=1)
# misclass = T.neq(y, y_hat).mean()
# misclass = T.cast(misclass, config.floatX)
# rval['misclass'] = misclass
# rval['nll'] = self.cost(Y_hat=state, Y=target)
log.debug('done');
def redo_theano(self):
"""
Recompiles Theano functions used by this monitor.
This is needed so that if new channels are added, Theano's
optimizations make sure (to the extent that they can) that the new
channels and old channels don't have any redundant calculations.
It is also needed to regenerate Theano functions after pickling and
unpickling, since Theano functions should not be pickled.
"""
self._dirty = False
init_names = dir(self)
self.prereqs = OrderedDict()
for channel in self.channels.values():
if channel.prereqs is not None:
dataset = channel.dataset
if dataset not in self.prereqs:
self.prereqs[dataset] = []
prereqs = self.prereqs[dataset]
for prereq in channel.prereqs:
if prereq not in prereqs:
prereqs.append(prereq)
updates = OrderedDict()
for channel in self.channels.values():
updates[channel.val_shared] = np.cast[config.floatX](0.0)
with log_timing(log, "compiling begin_record_entry"):
self.begin_record_entry = function(
inputs=[],
updates=updates,
mode=self.theano_function_mode,
name='Monitor.begin_record_entry')
updates = OrderedDict()
givens = OrderedDict()
# Get the appropriate kind of theano variable to represent the data the model
# acts on
X = self.model.get_input_space().make_theano_batch(name="monitoring_X")
if config.compute_test_value != 'off':
m = self.model.get_test_batch_size()
test_value = self.model.get_input_space().get_origin_batch(m)
X.tag.test_value = np.cast[X.type.dtype](test_value)
if self.require_label:
Y = self.model.get_output_space().make_theano_batch(
name="monitoring_Y")
log.info('Monitored channels: ')
for key in sorted(self.channels.keys()):
mode = self.theano_function_mode
if mode is not None and hasattr(mode, 'record'):
mode.record.handle_line(
'compiling monitor including channel ' + key + '\n')
log.info('\t%s' % key)
it = [d.iterator(mode=i, num_batches=n, batch_size=b, topo=self.topo) \
for d, i, n, b in safe_izip(self._datasets, self._iteration_mode,
self._num_batches, self._batch_size)]
self.num_examples = [
np.cast[config.floatX](float(i.num_examples)) for i in it
]
givens = [OrderedDict() for d in self._datasets]
updates = [OrderedDict() for d in self._datasets]
for channel in self.channels.values():
index = self._datasets.index(channel.dataset)
d = self._datasets[index]
g = givens[index]
cur_num_examples = self.num_examples[index]
u = updates[index]
if isinstance(channel.graph_input, (list, tuple)):
channel_X, channel_Y = channel.graph_input
assert channel_X not in g or g[channel_X] is X
assert channel_Y not in g or g[channel_Y] is Y
g[channel_X] = X
g[channel_Y] = Y
else:
channel_X = channel.graph_input
assert channel_X not in g or g[channel_X] is X
g[channel_X] = X
if n == 0:
raise ValueError(
"Iterating over 0 examples results in divide by 0")
if self.topo:
batch_index = d.get_topo_batch_axis()
else:
batch_index = 0
val = channel.val * T.cast(X.shape[batch_index],
config.floatX) / cur_num_examples
u[channel.val_shared] = channel.val_shared + val
with log_timing(log, "Compiling accum"):
# Check type of update expressions
for up in updates:
for key in up:
if key.dtype != up[key].dtype:
raise TypeError('Monitoring channel shared variable ' \
+ key.name + ' has dtype ' + key.dtype + \
' but is driven by an expression with type ' + \
up[key].dtype)
self.accum = []
for idx, packed in enumerate(safe_izip(givens, updates)):
g, u = packed
mode = self.theano_function_mode
if mode is not None and hasattr(mode, 'record'):
for elem in g:
mode.record.handle_line('g key ' +
var_descriptor(elem) + '\n')
mode.record.handle_line('g val ' +
var_descriptor(g[elem]) + '\n')
for elem in u:
mode.record.handle_line('u key ' +
var_descriptor(elem) + '\n')
mode.record.handle_line('u val ' +
var_descriptor(u[elem]) + '\n')
function_name = 'Monitor.accum[%d]' % idx
if self.require_label:
if mode is not None and hasattr(mode, 'record'):
mode.record.handle_line('compiling supervised accum\n')
# Some channels may not depend on the data, ie, they might just monitor the model
# parameters, or some shared variable updated by the training algorithm, so we
# need to ignore the unused input error
self.accum.append(
function([X, Y],
givens=g,
updates=u,
mode=self.theano_function_mode,
name=function_name))
else:
if mode is not None and hasattr(mode, 'record'):
mode.record.handle_line(
'compiling unsupervised accum\n')
self.accum.append(
function([X],
givens=g,
updates=u,
mode=self.theano_function_mode,
name=function_name))
for a in self.accum:
if mode is not None and hasattr(mode, 'record'):
for elem in a.maker.fgraph.outputs:
mode.record.handle_line('accum output ' +
var_descriptor(elem) + '\n')
log.info("graph size: %d" % len(a.maker.fgraph.toposort()))
final_names = dir(self)
self.register_names_to_del(
[name for name in final_names if name not in init_names])
def __init__(
self,
path,
name='', # optional name
# selectors
subjects='all', # optional selector (list) or 'all'
trial_types='all', # optional selector (list) or 'all'
trial_numbers='all', # optional selector (list) or 'all'
conditions='all', # optional selector (list) or 'all'
partitioner=None,
channel_filter=NoChannelFilter(
), # optional channel filter, default: keep all
channel_names=None, # optional channel names (for metadata)
label_map=None, # optional conversion of labels
remove_dc_offset=False, # optional subtraction of channel mean, usually done already earlier
resample=None, # optional down-sampling
# optional sub-sequences selection
start_sample=0,
stop_sample=None, # optional for selection of sub-sequences
# optional signal filter to by applied before spitting the signal
signal_filter=None,
# windowing parameters
frame_size=-1,
hop_size=-1, # values > 0 will lead to windowing
hop_fraction=None, # alternative to specifying absolute hop_size
# optional spectrum parameters, n_fft = 0 keeps raw data
n_fft=0,
n_freq_bins=None,
spectrum_log_amplitude=False,
spectrum_normalization_mode=None,
include_phase=False,
flatten_channels=False,
layout='tf', # (0,1)-axes layout tf=time x features or ft=features x time
save_matrix_path=None,
keep_metadata=False,
):
'''
Constructor
'''
# save params
self.params = locals().copy()
del self.params['self']
# print self.params
# TODO: get the whole filtering into an extra class
datafiles_metadata, metadb = load_datafiles_metadata(path)
# print datafiles_metadata
def apply_filters(filters, node):
if isinstance(node, dict):
filtered = []
keepkeys = filters[0]
for key, value in node.items():
if keepkeys == 'all' or key in keepkeys:
filtered.extend(apply_filters(filters[1:], value))
return filtered
else:
return node # [node]
# keep only files that match the metadata filters
self.datafiles = apply_filters(
[subjects, trial_types, trial_numbers, conditions],
datafiles_metadata)
# copy metadata for retained files
self.metadb = {}
for datafile in self.datafiles:
self.metadb[datafile] = metadb[datafile]
# print self.datafiles
# print self.metadb
self.name = name
if partitioner is not None:
self.datafiles = partitioner.get_partition(self.name, self.metadb)
self.include_phase = include_phase
self.spectrum_normalization_mode = spectrum_normalization_mode
self.spectrum_log_amplitude = spectrum_log_amplitude
self.sequence_partitions = [
] # used to keep track of original sequences
# metadata: [subject, trial_no, stimulus, channel, start, ]
self.metadata = []
sequences = []
labels = []
n_sequences = 0
if frame_size > 0 and hop_size == -1 and hop_fraction is not None:
hop_size = np.ceil(frame_size / hop_fraction)
for i in xrange(len(self.datafiles)):
with log_timing(log,
'loading data from {}'.format(self.datafiles[i])):
# save start of next sequence
self.sequence_partitions.append(n_sequences)
data, metadata = load(os.path.join(path, self.datafiles[i]))
label = metadata['label']
if label_map is not None:
label = label_map[label]
multi_channel_frames = []
# process 1 channel at a time
for channel in xrange(data.shape[1]):
# filter channels
if not channel_filter.keep_channel(channel):
continue
samples = data[:, channel]
# subtract channel mean
if remove_dc_offset:
samples -= samples.mean()
# down-sample if requested
if resample is not None and resample[0] != resample[1]:
samples = librosa.resample(samples, resample[0],
resample[1])
# apply optional signal filter after down-sampling -> requires lower order
if signal_filter is not None:
samples = signal_filter.process(samples)
# get sub-sequence in resampled space
# log.info('using samples {}..{} of {}'.format(start_sample,stop_sample, samples.shape))
samples = samples[start_sample:stop_sample]
if n_fft is not None and n_fft > 0: # Optionally:
### frequency spectrum branch ###
# transform to spectogram
hop_length = n_fft / 4
'''
from http://theremin.ucsd.edu/~bmcfee/librosadoc/librosa.html
>>> # Get a power spectrogram from a waveform y
>>> S = np.abs(librosa.stft(y)) ** 2
>>> log_S = librosa.logamplitude(S)
'''
S = librosa.core.stft(samples,
n_fft=n_fft,
hop_length=hop_length)
# mag = np.abs(S) # magnitude spectrum
mag = np.abs(S)**2 # power spectrum
# include phase information if requested
if self.include_phase:
# phase = np.unwrap(np.angle(S))
phase = np.angle(S)
# Optionally: cut off high bands
if n_freq_bins is not None:
mag = mag[0:n_freq_bins, :]
if self.include_phase:
phase = phase[0:n_freq_bins, :]
if self.spectrum_log_amplitude:
mag = librosa.logamplitude(mag)
s = mag # for normalization
'''
NOTE on normalization:
It depends on the structure of a neural network and (even more)
on the properties of data. There is no best normalization algorithm
because if there would be one, it would be used everywhere by default...
In theory, there is no requirement for the data to be normalized at all.
This is a purely practical thing because in practice convergence could
take forever if your input is spread out too much. The simplest would be
to just normalize it by scaling your data to (-1,1) (or (0,1) depending
on activation function), and in most cases it does work. If your
algorithm converges well, then this is your answer. If not, there are
too many possible problems and methods to outline here without knowing
the actual data.
'''
## normalize to mean 0, std 1
if self.spectrum_normalization_mode == 'mean0_std1':
# s = preprocessing.scale(s, axis=0);
mean = np.mean(s)
std = np.std(s)
s = (s - mean) / std
## normalize by linear transform to [0,1]
elif self.spectrum_normalization_mode == 'linear_0_1':
s = s / np.max(s)
## normalize by linear transform to [-1,1]
elif self.spectrum_normalization_mode == 'linear_-1_1':
s = -1 + 2 * (s - np.min(s)) / (np.max(s) -
np.min(s))
elif self.spectrum_normalization_mode is not None:
raise ValueError(
'unsupported spectrum normalization mode {}'.
format(self.spectrum_normalization_mode))
#print s.mean(axis=0)
#print s.std(axis=0)
# include phase information if requested
if self.include_phase:
# normalize phase to [-1.1]
phase = phase / np.pi
s = np.vstack([s, phase])
# transpose to fit pylearn2 layout
s = np.transpose(s)
# print s.shape
### end of frequency spectrum branch ###
else:
### raw waveform branch ###
# normalize to max amplitude 1
s = librosa.util.normalize(samples)
# add 2nd data dimension
s = s.reshape(s.shape[0], 1)
# print s.shape
### end of raw waveform branch ###
s = np.asfarray(s, dtype='float32')
if frame_size > 0 and hop_size > 0:
s = s.copy(
) # FIXME: THIS IS NECESSARY IN MultiChannelEEGSequencesDataset - OTHERWISE, THE FOLLOWING OP DOES NOT WORK!!!!
frames = frame(s,
frame_length=frame_size,
hop_length=hop_size)
else:
frames = s
del s
# print frames.shape
if flatten_channels:
# add artificial channel dimension
frames = frames.reshape(
(frames.shape[0], frames.shape[1], frames.shape[2],
1))
# print frames.shape
sequences.append(frames)
# increment counter by new number of frames
n_sequences += frames.shape[0]
if keep_metadata:
# determine channel name
channel_name = None
if channel_names is not None:
channel_name = channel_names[channel]
elif 'channels' in metadata:
channel_name = metadata['channels'][channel]
self.metadata.append({
'subject':
metadata['subject'], # subject
'trial_type':
metadata['trial_type'], # trial_type
'trial_no':
metadata['trial_no'], # trial_no
'condition':
metadata['condition'], # condition
'channel':
channel, # channel
'channel_name':
channel_name,
'start':
self.sequence_partitions[-1], # start
'stop':
n_sequences # stop
})
for _ in xrange(frames.shape[0]):
labels.append(label)
else:
multi_channel_frames.append(frames)
### end of channel iteration ###
if not flatten_channels:
# turn list into array
multi_channel_frames = np.asfarray(multi_channel_frames,
dtype='float32')
# [channels x frames x time x freq] -> cb01
# [channels x frames x time x 1] -> cb0.
# move channel dimension to end
multi_channel_frames = np.rollaxis(multi_channel_frames, 0,
4)
# print multi_channel_frames.shape
# log.debug(multi_channel_frames.shape)
sequences.append(multi_channel_frames)
# increment counter by new number of frames
n_sequences += multi_channel_frames.shape[0]
if keep_metadata:
self.metadata.append({
'subject':
metadata['subject'], # subject
'trial_type':
metadata['trial_type'], # trial_type
'trial_no':
metadata['trial_no'], # trial_no
'condition':
metadata['condition'], # condition
'channel':
'all', # channel
'start':
self.sequence_partitions[-1], # start
'stop':
n_sequences # stop
})
for _ in xrange(multi_channel_frames.shape[0]):
labels.append(label)
### end of datafile iteration ###
# turn into numpy arrays
sequences = np.vstack(sequences)
# print sequences.shape;
labels = np.hstack(labels)
# one_hot_y = one_hot(labels)
one_hot_formatter = OneHotFormatter(labels.max() + 1) # FIXME!
one_hot_y = one_hot_formatter.format(labels)
self.labels = labels
if layout == 'ft': # swap axes to (batch, feature, time, channels)
sequences = sequences.swapaxes(1, 2)
log.debug('final dataset shape: {} (b,0,1,c)'.format(sequences.shape))
super(MultiChannelEEGDataset, self).__init__(topo_view=sequences,
y=one_hot_y,
axes=['b', 0, 1, 'c'])
log.info(
'generated dataset "{}" with shape X={}={} y={} labels={} '.format(
self.name, self.X.shape, sequences.shape, self.y.shape,
self.labels.shape))
if save_matrix_path is not None:
matrix = DenseDesignMatrix(topo_view=sequences,
y=one_hot_y,
axes=['b', 0, 1, 'c'])
with log_timing(
log,
'saving DenseDesignMatrix to {}'.format(save_matrix_path)):
serial.save(save_matrix_path, matrix)
def get_func(learn_discriminator, learn_generator, dont_you_fucking_dare_touch_the_generator=False):
updates = OrderedDict()
assert (learn_discriminator or learn_generator) and not (learn_discriminator and learn_generator)
if learn_discriminator:
cur_params = model.discriminator.get_params()
else:
cur_params = model.generator.get_params()
def check():
for param in params:
if param not in cur_params:
assert param not in updates
cur_grads = OrderedDict()
for param in cur_params:
cur_grads[param] = grads[param]
for param in grads:
if grads[param].name is None and cost_value is not None:
grads[param].name = ('grad(%(costname)s, %(paramname)s)' %
{'costname': cost_value.name,
'paramname': param.name})
assert grads[param].dtype == param.dtype
cur_lr_scalers = OrderedDict()
for param in cur_params:
if param in lr_scalers:
lr_scaler = lr_scalers[param]
cur_lr_scalers[param] = lr_scaler
log.info('Parameter and initial learning rate summary:')
for param in cur_params:
param_name = param.name
if param_name is None:
param_name = 'anon_param'
lr = learning_rate.get_value() * cur_lr_scalers.get(param,1.)
log.info('\t' + param_name + ': ' + str(lr))
updates.update(self.learning_rule.get_updates(
learning_rate, cur_grads, cur_lr_scalers))
check()
for param in cur_params:
if updates[param].name is None:
updates[param].name = 'sgd_update(' + param.name + ')'
check()
model.modify_updates(updates)
check()
for param in cur_params:
update = updates[param]
if update.name is None:
update.name = 'censor(sgd_update(' + param.name + '))'
for update_val in get_debug_values(update):
if np.any(np.isinf(update_val)):
raise ValueError("debug value of %s contains infs" %
update.name)
if np.any(np.isnan(update_val)):
raise ValueError("debug value of %s contains nans" %
update.name)
check()
if dont_you_fucking_dare_touch_the_generator:
for param in model.generator.get_params():
assert param not in updates
with log_timing(log, 'Compiling sgd_update'):
return function(theano_args,
updates=updates,
name='sgd_update',
on_unused_input='ignore',
mode=self.theano_function_mode)
def setup(self, model, dataset):
if self.cost is None:
self.cost = model.get_default_cost()
inf_params = [ param for param in model.get_params() if np.any(np.isinf(param.get_value())) ]
if len(inf_params) > 0:
raise ValueError("These params are Inf: "+str(inf_params))
if any([np.any(np.isnan(param.get_value())) for param in model.get_params()]):
nan_params = [ param for param in model.get_params() if np.any(np.isnan(param.get_value())) ]
raise ValueError("These params are NaN: "+str(nan_params))
self.model = model
batch_size = self.batch_size
if hasattr(model, "force_batch_size"):
if model.force_batch_size > 0:
if batch_size is not None:
if batch_size != model.force_batch_size:
if self.set_batch_size:
model.set_batch_size(batch_size)
else:
raise ValueError("batch_size argument to SGD conflicts with model's force_batch_size attribute")
else:
self.batch_size = model.force_batch_size
model._test_batch_size = self.batch_size
self.monitor = Monitor.get_monitor(model)
# TODO: come up with some standard scheme for associating training runs
# with monitors / pushing the monitor automatically, instead of just
# enforcing that people have called push_monitor
assert self.monitor.get_examples_seen() == 0
self.monitor._sanity_check()
X = model.get_input_space().make_theano_batch(name="%s[X]" % self.__class__.__name__)
self.topo = not X.ndim == 2
if config.compute_test_value == 'raise':
if self.topo:
X.tag.test_value = dataset.get_batch_topo(self.batch_size)
else:
X.tag.test_value = dataset.get_batch_design(self.batch_size)
Y = T.matrix(name="%s[Y]" % self.__class__.__name__)
if self.cost.supervised:
if config.compute_test_value == 'raise':
_, Y.tag.test_value = dataset.get_batch_design(self.batch_size, True)
self.supervised = True
cost_value = self.cost(model, X, Y)
else:
self.supervised = False
cost_value = self.cost(model, X)
if cost_value is not None and cost_value.name is None:
if self.supervised:
cost_value.name = 'objective(' + X.name + ', ' + Y.name + ')'
else:
cost_value.name = 'objective(' + X.name + ')'
# Set up monitor to model the objective value, learning rate,
# momentum (if applicable), and extra channels defined by
# the cost
learning_rate = self.learning_rate
if self.monitoring_dataset is not None:
self.monitor.setup(dataset=self.monitoring_dataset,
cost=self.cost, batch_size=self.batch_size, num_batches=self.monitoring_batches,
extra_costs=self.monitoring_costs
)
if self.supervised:
ipt = (X, Y)
else:
ipt = X
dataset_name = self.monitoring_dataset.keys()[0]
monitoring_dataset = self.monitoring_dataset[dataset_name]
#TODO: have Monitor support non-data-dependent channels
self.monitor.add_channel(name='learning_rate', ipt=ipt,
val=learning_rate, dataset=monitoring_dataset)
if self.momentum:
self.monitor.add_channel(name='momentum', ipt=ipt,
val=self.momentum, dataset=monitoring_dataset)
params = list(model.get_params())
assert len(params) > 0
for i, param in enumerate(params):
if param.name is None:
param.name = 'sgd_params[%d]' % i
if self.cost.supervised:
grads, updates = self.cost.get_gradients(model, X, Y)
else:
grads, updates = self.cost.get_gradients(model, X)
for param in grads:
assert param in params
for param in params:
assert param in grads
for param in grads:
if grads[param].name is None and cost_value is not None:
grads[param].name = ('grad(%(costname)s, %(paramname)s)' %
{'costname': cost_value.name,
'paramname': param.name})
lr_scalers = model.get_lr_scalers()
for key in lr_scalers:
if key not in params:
raise ValueError("Tried to scale the learning rate on " +\
str(key)+" which is not an optimization parameter.")
log.info('Parameter and initial learning rate summary:')
for param in params:
param_name = param.name
if param_name is None:
param_name = 'anon_param'
lr = learning_rate.get_value() * lr_scalers.get(param,1.)
log.info('\t' + param_name + ': ' + str(lr))
if self.momentum is None:
updates.update( dict(safe_zip(params, [param - learning_rate * \
lr_scalers.get(param, 1.) * grads[param]
for param in params])))
else:
for param in params:
inc = sharedX(param.get_value() * 0.)
if param.name is not None:
inc.name = 'inc_'+param.name
updated_inc = self.momentum * inc - learning_rate * lr_scalers.get(param, 1.) * grads[param]
updates[inc] = updated_inc
updates[param] = param + updated_inc
for param in params:
if updates[param].name is None:
updates[param].name = 'sgd_update(' + param.name + ')'
model.censor_updates(updates)
for param in params:
update = updates[param]
if update.name is None:
update.name = 'censor(sgd_update(' + param.name + '))'
for update_val in get_debug_values(update):
if np.any(np.isinf(update_val)):
raise ValueError("debug value of %s contains infs" % update.name)
if np.any(np.isnan(update_val)):
raise ValueError("debug value of %s contains nans" % update.name)
with log_timing(log, 'Compiling sgd_update'):
if self.supervised:
fn_inputs = [X, Y]
else:
fn_inputs = [X]
self.sgd_update = function(fn_inputs, updates=updates,
name='sgd_update',
on_unused_input='ignore',
mode=self.theano_function_mode)
self.params = params
def setup(self, model, dataset):
"""
Compiles the theano functions needed for the train method.
Parameters
----------
model : a Model instance
dataset : Dataset
"""
if self.cost is None:
self.cost = model.get_default_cost()
inf_params = [param for param in model.get_params()
if contains_inf(param.get_value())]
if len(inf_params) > 0:
raise ValueError("These params are Inf: "+str(inf_params))
if any([contains_nan(param.get_value())
for param in model.get_params()]):
nan_params = [param for param in model.get_params()
if contains_nan(param.get_value())]
raise ValueError("These params are NaN: "+str(nan_params))
self.model = model
self._synchronize_batch_size(model)
model._test_batch_size = self.batch_size
self.monitor = Monitor.get_monitor(model)
self.monitor._sanity_check()
# test if force batch size and batch size
has_force_batch_size = getattr(model, "force_batch_size", False)
train_dataset_is_uneven = \
dataset.get_num_examples() % self.batch_size != 0
has_monitoring_datasets = \
self.monitoring_dataset is not None and \
self.monitoring_dataset.values() > 0
if has_monitoring_datasets:
monitoring_datasets_are_uneven = \
any(d.get_num_examples() % self.batch_size
!= 0 for d in self.monitoring_dataset.values())
else:
monitoring_datasets_are_uneven = False # or True it doesn't matter
if has_force_batch_size and train_dataset_is_uneven and \
not has_uniform_batch_size(self.train_iteration_mode):
raise ValueError("Dataset size is not a multiple of batch size."
"You should set train_iteration_mode (and "
"maybe monitor_iteration_mode) to "
"even_sequential, even_shuffled_sequential or "
"even_batchwise_shuffled_sequential")
if has_force_batch_size and has_monitoring_datasets and \
monitoring_datasets_are_uneven and \
not has_uniform_batch_size(self.monitor_iteration_mode):
raise ValueError("Dataset size is not a multiple of batch size."
"You should set monitor_iteration_mode to "
"even_sequential, even_shuffled_sequential or "
"even_batchwise_shuffled_sequential")
data_specs = self.cost.get_data_specs(self.model)
mapping = DataSpecsMapping(data_specs)
space_tuple = mapping.flatten(data_specs[0], return_tuple=True)
source_tuple = mapping.flatten(data_specs[1], return_tuple=True)
# Build a flat tuple of Theano Variables, one for each space.
# We want that so that if the same space/source is specified
# more than once in data_specs, only one Theano Variable
# is generated for it, and the corresponding value is passed
# only once to the compiled Theano function.
theano_args = []
for space, source in safe_zip(space_tuple, source_tuple):
name = '%s[%s]' % (self.__class__.__name__, source)
arg = space.make_theano_batch(name=name,
batch_size=self.batch_size)
theano_args.append(arg)
theano_args = tuple(theano_args)
# Methods of `self.cost` need args to be passed in a format compatible
# with data_specs
nested_args = mapping.nest(theano_args)
fixed_var_descr = self.cost.get_fixed_var_descr(model, nested_args)
self.on_load_batch = fixed_var_descr.on_load_batch
cost_value = self.cost.expr(model, nested_args,
** fixed_var_descr.fixed_vars)
if cost_value is not None and cost_value.name is None:
# Concatenate the name of all tensors in theano_args !?
cost_value.name = 'objective'
learning_rate = self.learning_rate
params = list(model.get_params())
assert len(params) > 0
for i, param in enumerate(params):
if param.name is None:
param.name = 'sgd_params[%d]' % i
grads, updates = self.cost.get_gradients(model, nested_args,
** fixed_var_descr.fixed_vars)
if not isinstance(grads, OrderedDict):
raise TypeError(str(type(self.cost)) + ".get_gradients returned " +
"something with" + str(type(grads)) + "as its " +
"first member. Expected OrderedDict.")
for param in grads:
assert param in params
for param in params:
assert param in grads
for param in grads:
if grads[param].name is None and cost_value is not None:
grads[param].name = ('grad(%(costname)s, %(paramname)s)' %
{'costname': cost_value.name,
'paramname': param.name})
assert grads[param].dtype == param.dtype
lr_scalers = model.get_lr_scalers()
for key in lr_scalers:
if key not in params:
raise ValueError("Tried to scale the learning rate on " +\
str(key)+" which is not an optimization parameter.")
log.info('Parameter and initial learning rate summary:')
for param in params:
param_name = param.name
if param_name is None:
param_name = 'anon_param'
lr = learning_rate.get_value() * lr_scalers.get(param,1.)
log.info('\t' + param_name + ': ' + str(lr))
if self.learning_rule:
updates.update(self.learning_rule.get_updates(
learning_rate, grads, lr_scalers))
else:
# Use standard SGD updates with fixed learning rate.
updates.update( dict(safe_zip(params, [param - learning_rate * \
lr_scalers.get(param, 1.) * grads[param]
for param in params])))
for param in params:
if updates[param].name is None:
updates[param].name = 'sgd_update(' + param.name + ')'
model.modify_updates(updates)
for param in params:
update = updates[param]
if update.name is None:
update.name = 'censor(sgd_update(' + param.name + '))'
for update_val in get_debug_values(update):
if contains_inf(update_val):
raise ValueError("debug value of %s contains infs" %
update.name)
if contains_nan(update_val):
raise ValueError("debug value of %s contains nans" %
update.name)
# Set up monitor to model the objective value, learning rate,
# momentum (if applicable), and extra channels defined by
# the cost.
# We have to do that after learning_rule.get_updates has been
# called, since it may have an effect on
# learning_rule.add_channels_to_monitor (that is currently the case
# for AdaDelta and RMSProp).
self._setup_monitor()
with log_timing(log, 'Compiling sgd_update'):
self.sgd_update = function(theano_args,
updates=updates,
name='sgd_update',
on_unused_input='ignore',
mode=self.theano_function_mode)
self.params = params
def setup(self, model, dataset):
"""
Compiles the theano functions needed for the train method.
"""
if self.cost is None:
self.cost = model.get_default_cost()
inf_params = [param for param in model.get_params()
if np.any(np.isinf(param.get_value()))]
if len(inf_params) > 0:
raise ValueError("These params are Inf: "+str(inf_params))
if any([np.any(np.isnan(param.get_value()))
for param in model.get_params()]):
nan_params = [param for param in model.get_params()
if np.any(np.isnan(param.get_value()))]
raise ValueError("These params are NaN: "+str(nan_params))
self.model = model
batch_size = self.batch_size
if hasattr(model, "force_batch_size"):
if model.force_batch_size > 0:
if batch_size is not None:
if batch_size != model.force_batch_size:
if self.set_batch_size:
model.set_batch_size(batch_size)
else:
raise ValueError("batch_size argument to SGD " +
"conflicts with model's " +
"force_batch_size attribute")
else:
self.batch_size = model.force_batch_size
model._test_batch_size = self.batch_size
self.monitor = Monitor.get_monitor(model)
self.monitor._sanity_check()
data_specs = self.cost.get_data_specs(self.model)
mapping = DataSpecsMapping(data_specs)
space_tuple = mapping.flatten(data_specs[0], return_tuple=True)
source_tuple = mapping.flatten(data_specs[1], return_tuple=True)
# Build a flat tuple of Theano Variables, one for each space.
# We want that so that if the same space/source is specified
# more than once in data_specs, only one Theano Variable
# is generated for it, and the corresponding value is passed
# only once to the compiled Theano function.
theano_args = []
for space, source in safe_zip(space_tuple, source_tuple):
name = '%s[%s]' % (self.__class__.__name__, source)
arg = space.make_theano_batch(name=name,
batch_size=self.batch_size)
theano_args.append(arg)
theano_args = tuple(theano_args)
# Methods of `self.cost` need args to be passed in a format compatible
# with data_specs
nested_args = mapping.nest(theano_args)
fixed_var_descr = self.cost.get_fixed_var_descr(model, nested_args)
self.on_load_batch = fixed_var_descr.on_load_batch
cost_value = self.cost.expr(model, nested_args,
** fixed_var_descr.fixed_vars)
if cost_value is not None and cost_value.name is None:
# Concatenate the name of all tensors in theano_args !?
cost_value.name = 'objective'
# Set up monitor to model the objective value, learning rate,
# momentum (if applicable), and extra channels defined by
# the cost
learning_rate = self.learning_rate
if self.monitoring_dataset is not None:
self.monitor.setup(
dataset=self.monitoring_dataset,
cost=self.cost,
batch_size=self.batch_size,
num_batches=self.monitoring_batches,
extra_costs=self.monitoring_costs,
mode=self.monitor_iteration_mode
)
dataset_name = self.monitoring_dataset.keys()[0]
monitoring_dataset = self.monitoring_dataset[dataset_name]
#TODO: have Monitor support non-data-dependent channels
self.monitor.add_channel(name='learning_rate',
ipt=None,
val=learning_rate,
data_specs=(NullSpace(), ''),
dataset=monitoring_dataset)
if self.learning_rule:
self.learning_rule.add_channels_to_monitor(
self.monitor,
monitoring_dataset)
params = list(model.get_params())
assert len(params) > 0
for i, param in enumerate(params):
if param.name is None:
param.name = 'sgd_params[%d]' % i
grads, updates = self.cost.get_gradients(model, nested_args,
** fixed_var_descr.fixed_vars)
if not isinstance(grads, OrderedDict):
raise TypeError(str(type(self.cost)) + ".get_gradients returned " +
"something with" + str(type(grads)) + "as its " +
"first member. Expected OrderedDict.")
for param in grads:
assert param in params
for param in params:
assert param in grads
for param in grads:
if grads[param].name is None and cost_value is not None:
grads[param].name = ('grad(%(costname)s, %(paramname)s)' %
{'costname': cost_value.name,
'paramname': param.name})
assert grads[param].dtype == param.dtype
lr_scalers = model.get_lr_scalers()
for key in lr_scalers:
if key not in params:
raise ValueError("Tried to scale the learning rate on " +\
str(key)+" which is not an optimization parameter.")
log.info('Parameter and initial learning rate summary:')
for param in params:
param_name = param.name
if param_name is None:
param_name = 'anon_param'
lr = learning_rate.get_value() * lr_scalers.get(param,1.)
log.info('\t' + param_name + ': ' + str(lr))
if self.learning_rule:
updates.update(self.learning_rule.get_updates(
learning_rate, grads, lr_scalers))
else:
# Use standard SGD updates with fixed learning rate.
updates.update( dict(safe_zip(params, [param - learning_rate * \
lr_scalers.get(param, 1.) * grads[param]
for param in params])))
for param in params:
if updates[param].name is None:
updates[param].name = 'sgd_update(' + param.name + ')'
model.censor_updates(updates)
for param in params:
update = updates[param]
if update.name is None:
update.name = 'censor(sgd_update(' + param.name + '))'
for update_val in get_debug_values(update):
if np.any(np.isinf(update_val)):
raise ValueError("debug value of %s contains infs" % update.name)
if np.any(np.isnan(update_val)):
raise ValueError("debug value of %s contains nans" % update.name)
with log_timing(log, 'Compiling sgd_update'):
self.sgd_update = function(theano_args,
updates=updates,
name='sgd_update',
on_unused_input='ignore',
mode=self.theano_function_mode)
self.params = params
def setup(self, model, dataset):
"""
Compiles the theano functions needed for the train method.
"""
if self.cost is None:
self.cost = model.get_default_cost()
inf_params = [param for param in model.get_params()
if np.any(np.isinf(param.get_value()))]
if len(inf_params) > 0:
raise ValueError("These params are Inf: "+str(inf_params))
if any([np.any(np.isnan(param.get_value()))
for param in model.get_params()]):
nan_params = [param for param in model.get_params()
if np.any(np.isnan(param.get_value()))]
raise ValueError("These params are NaN: "+str(nan_params))
self.model = model
self._synchronize_batch_size(model)
model._test_batch_size = self.batch_size
self.monitor = Monitor.get_monitor(model)
self.monitor._sanity_check()
data_specs = self.cost.get_data_specs(self.model)
mapping = DataSpecsMapping(data_specs)
space_tuple = mapping.flatten(data_specs[0], return_tuple=True)
source_tuple = mapping.flatten(data_specs[1], return_tuple=True)
# Build a flat tuple of Theano Variables, one for each space.
# We want that so that if the same space/source is specified
# more than once in data_specs, only one Theano Variable
# is generated for it, and the corresponding value is passed
# only once to the compiled Theano function.
theano_args = []
for space, source in safe_zip(space_tuple, source_tuple):
name = '%s[%s]' % (self.__class__.__name__, source)
arg = space.make_theano_batch(name=name,
batch_size=self.batch_size)
theano_args.append(arg)
theano_args = tuple(theano_args)
# Methods of `self.cost` need args to be passed in a format compatible
# with data_specs
nested_args = mapping.nest(theano_args)
fixed_var_descr = self.cost.get_fixed_var_descr(model, nested_args)
self.on_load_batch = fixed_var_descr.on_load_batch
cost_value = self.cost.expr(model, nested_args,
** fixed_var_descr.fixed_vars)
if cost_value is not None and cost_value.name is None:
# Concatenate the name of all tensors in theano_args !?
cost_value.name = 'objective'
# Set up monitor to model the objective value, learning rate,
# momentum (if applicable), and extra channels defined by
# the cost
learning_rate = self.learning_rate
if self.monitoring_dataset is not None:
self.monitor.setup(dataset=self.monitoring_dataset,
cost=self.cost,
batch_size=self.batch_size,
num_batches=self.monitoring_batches,
extra_costs=self.monitoring_costs,
mode=self.monitor_iteration_mode)
dataset_name = self.monitoring_dataset.keys()[0]
monitoring_dataset = self.monitoring_dataset[dataset_name]
#TODO: have Monitor support non-data-dependent channels
self.monitor.add_channel(name='learning_rate',
ipt=None,
val=learning_rate,
data_specs=(NullSpace(), ''),
dataset=monitoring_dataset)
if self.learning_rule:
self.learning_rule.add_channels_to_monitor(
self.monitor,
monitoring_dataset)
params = list(model.get_params())
assert len(params) > 0
for i, param in enumerate(params):
if param.name is None:
param.name = 'sgd_params[%d]' % i
grads, updates = self.cost.get_gradients(model, nested_args,
** fixed_var_descr.fixed_vars)
if not isinstance(grads, OrderedDict):
raise TypeError(str(type(self.cost)) + ".get_gradients returned " +
"something with" + str(type(grads)) + "as its " +
"first member. Expected OrderedDict.")
for param in grads:
assert param in params
for param in params:
assert param in grads
for param in grads:
if grads[param].name is None and cost_value is not None:
grads[param].name = ('grad(%(costname)s, %(paramname)s)' %
{'costname': cost_value.name,
'paramname': param.name})
assert grads[param].dtype == param.dtype
lr_scalers = model.get_lr_scalers()
for key in lr_scalers:
if key not in params:
raise ValueError("Tried to scale the learning rate on " +\
str(key)+" which is not an optimization parameter.")
log.info('Parameter and initial learning rate summary:')
for param in params:
param_name = param.name
if param_name is None:
param_name = 'anon_param'
lr = learning_rate.get_value() * lr_scalers.get(param,1.)
log.info('\t' + param_name + ': ' + str(lr))
if self.learning_rule:
updates.update(self.learning_rule.get_updates(
learning_rate, grads, lr_scalers))
else:
# Use standard SGD updates with fixed learning rate.
updates.update( dict(safe_zip(params, [param - learning_rate * \
lr_scalers.get(param, 1.) * grads[param]
for param in params])))
for param in params:
if updates[param].name is None:
updates[param].name = 'sgd_update(' + param.name + ')'
model.censor_updates(updates)
for param in params:
update = updates[param]
if update.name is None:
update.name = 'censor(sgd_update(' + param.name + '))'
for update_val in get_debug_values(update):
if np.any(np.isinf(update_val)):
raise ValueError("debug value of %s contains infs" %
update.name)
if np.any(np.isnan(update_val)):
raise ValueError("debug value of %s contains nans" %
update.name)
with log_timing(log, 'Compiling sgd_update'):
self.sgd_update = function(theano_args,
updates=updates,
name='sgd_update',
on_unused_input='ignore',
mode=self.theano_function_mode)
self.params = params
def setup(self, model, dataset):
if self.cost is None:
self.cost = model.get_default_cost()
inf_params = [
param for param in model.get_params()
if np.any(np.isinf(param.get_value()))
]
if len(inf_params) > 0:
raise ValueError("These params are Inf: " + str(inf_params))
if any([
np.any(np.isnan(param.get_value()))
for param in model.get_params()
]):
nan_params = [
param for param in model.get_params()
if np.any(np.isnan(param.get_value()))
]
raise ValueError("These params are NaN: " + str(nan_params))
self.model = model
batch_size = self.batch_size
if hasattr(model, "force_batch_size"):
if model.force_batch_size > 0:
if batch_size is not None:
if batch_size != model.force_batch_size:
if self.set_batch_size:
model.set_batch_size(batch_size)
else:
raise ValueError(
"batch_size argument to SGD conflicts with model's force_batch_size attribute"
)
else:
self.batch_size = model.force_batch_size
model._test_batch_size = self.batch_size
self.monitor = Monitor.get_monitor(model)
self.monitor._sanity_check()
X = model.get_input_space().make_theano_batch(name="%s[X]" %
self.__class__.__name__)
self.topo = not X.ndim == 2
if config.compute_test_value == 'raise':
if self.topo:
X.tag.test_value = dataset.get_batch_topo(self.batch_size)
else:
X.tag.test_value = dataset.get_batch_design(self.batch_size)
Y = T.matrix(name="%s[Y]" % self.__class__.__name__)
fixed_var_descr = self.cost.get_fixed_var_descr(model, X, Y)
self.on_load_batch = fixed_var_descr.on_load_batch
if self.cost.supervised:
if config.compute_test_value == 'raise':
_, Y.tag.test_value = dataset.get_batch_design(
self.batch_size, True)
self.supervised = True
cost_value = self.cost(model, X, Y, **fixed_var_descr.fixed_vars)
else:
self.supervised = False
cost_value = self.cost(model, X, **fixed_var_descr.fixed_vars)
if cost_value is not None and cost_value.name is None:
if self.supervised:
cost_value.name = 'objective(' + X.name + ', ' + Y.name + ')'
else:
cost_value.name = 'objective(' + X.name + ')'
# Set up monitor to model the objective value, learning rate,
# momentum (if applicable), and extra channels defined by
# the cost
learning_rate = self.learning_rate
if self.monitoring_dataset is not None:
self.monitor.setup(dataset=self.monitoring_dataset,
cost=self.cost,
batch_size=self.batch_size,
num_batches=self.monitoring_batches,
extra_costs=self.monitoring_costs,
mode=self.monitor_iteration_mode)
if self.supervised:
ipt = (X, Y)
else:
ipt = X
dataset_name = self.monitoring_dataset.keys()[0]
monitoring_dataset = self.monitoring_dataset[dataset_name]
#TODO: have Monitor support non-data-dependent channels
self.monitor.add_channel(name='learning_rate',
ipt=ipt,
val=learning_rate,
dataset=monitoring_dataset)
if self.momentum:
self.monitor.add_channel(name='momentum',
ipt=ipt,
val=self.momentum,
dataset=monitoring_dataset)
params = list(model.get_params())
assert len(params) > 0
for i, param in enumerate(params):
if param.name is None:
param.name = 'sgd_params[%d]' % i
if self.cost.supervised:
grads, updates = self.cost.get_gradients(
model, X, Y, **fixed_var_descr.fixed_vars)
else:
grads, updates = self.cost.get_gradients(
model, X, **fixed_var_descr.fixed_vars)
for param in grads:
assert param in params
for param in params:
assert param in grads
for param in grads:
if grads[param].name is None and cost_value is not None:
grads[param].name = ('grad(%(costname)s, %(paramname)s)' % {
'costname': cost_value.name,
'paramname': param.name
})
lr_scalers = model.get_lr_scalers()
for key in lr_scalers:
if key not in params:
raise ValueError("Tried to scale the learning rate on " +\
str(key)+" which is not an optimization parameter.")
log.info('Parameter and initial learning rate summary:')
for param in params:
param_name = param.name
if param_name is None:
param_name = 'anon_param'
lr = learning_rate.get_value() * lr_scalers.get(param, 1.)
log.info('\t' + param_name + ': ' + str(lr))
if self.momentum is None:
updates.update( dict(safe_zip(params, [param - learning_rate * \
lr_scalers.get(param, 1.) * grads[param]
for param in params])))
else:
for param in params:
inc = sharedX(param.get_value() * 0.)
if param.name is not None:
inc.name = 'inc_' + param.name
updated_inc = self.momentum * inc - learning_rate * lr_scalers.get(
param, 1.) * grads[param]
updates[inc] = updated_inc
updates[param] = param + updated_inc
for param in params:
if updates[param].name is None:
updates[param].name = 'sgd_update(' + param.name + ')'
model.censor_updates(updates)
for param in params:
update = updates[param]
if update.name is None:
update.name = 'censor(sgd_update(' + param.name + '))'
for update_val in get_debug_values(update):
if np.any(np.isinf(update_val)):
raise ValueError("debug value of %s contains infs" %
update.name)
if np.any(np.isnan(update_val)):
raise ValueError("debug value of %s contains nans" %
update.name)
with log_timing(log, 'Compiling sgd_update'):
if self.supervised:
fn_inputs = [X, Y]
else:
fn_inputs = [X]
self.sgd_update = function(fn_inputs,
updates=updates,
name='sgd_update',
on_unused_input='ignore',
mode=self.theano_function_mode)
self.params = params
def main_loop(self, time_budget=None):
"""
Repeatedly runs an epoch of the training algorithm, runs any
epoch-level callbacks, and saves the model.
Parameters
----------
time_budget : int, optional
The maximum number of seconds before interrupting
training. Default is `None`, no time limit.
"""
t0 = datetime.now()
if self.algorithm is None:
self.model.monitor = Monitor.get_monitor(self.model)
self.model.monitor.time_budget_exceeded = False
self.setup_extensions()
# Model.censor_updates is used by the training algorithm to
# enforce constraints after each step of learning. Here we
# make sure the constraints are enforced from the start.
self.model.enforce_constraints()
self.run_callbacks_and_monitoring()
while True:
if self.exceeded_time_budget(t0, time_budget):
break
rval = self.model.train_all(dataset=self.dataset)
if rval is not None:
raise ValueError("Model.train_all should not return " +
"anything. Use Model.continue_learning " +
"to control whether learning continues.")
self.model.monitor.report_epoch()
extension_continue = self.run_callbacks_and_monitoring()
freq = self.save_freq
if freq > 0 and self.model.monitor.epochs_seen % freq == 0:
self.save()
continue_learning = (self.model.continue_learning()
and extension_continue)
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
else:
self.algorithm.setup(model=self.model, dataset=self.dataset)
self.setup_extensions()
# Model.censor_updates is used by the training algorithm to
# enforce constraints after each step of learning. Here we
# make sure the constraints are enforced from the start.
self.model.enforce_constraints()
if not hasattr(self.model, 'monitor'):
# TODO: is this really necessary? I just put this error here
# to prevent an AttributeError later, but I think we could
# rewrite to avoid the AttributeError
raise RuntimeError("The algorithm is responsible for setting"
" up the Monitor, but failed to.")
if len(self.model.monitor._datasets) > 0:
# This monitoring channel keeps track of a shared variable,
# which does not need inputs nor data.
self.training_seconds.__doc__ = """\
The number of seconds that were spent in actual training during the most
recent epoch. This excludes seconds that were spent running callbacks for
the extensions, computing monitoring channels, etc."""
self.model.monitor.add_channel(
name="training_seconds_this_epoch",
ipt=None,
val=self.training_seconds,
data_specs=(NullSpace(), ''),
dataset=self.model.monitor._datasets[0])
self.total_seconds.__doc__ = """\
The number of seconds that were spent on the entirety of processing for the
previous epoch. This includes not only training but also the computation of
the monitoring channels, running TrainExtension callbacks, etc. This value
is reported for the *previous* epoch because the amount of time spent on
monitoring for this epoch is not known until the monitoring channels have
already been reported."""
self.model.monitor.add_channel(
name="total_seconds_last_epoch",
ipt=None,
val=self.total_seconds,
data_specs=(NullSpace(), ''),
dataset=self.model.monitor._datasets[0])
self.run_callbacks_and_monitoring()
while True:
if self.exceeded_time_budget(t0, time_budget):
break
with log_timing(log,
None,
level=logging.DEBUG,
callbacks=[self.total_seconds.set_value]):
with log_timing(
log,
None,
final_msg='Time this epoch:',
callbacks=[self.training_seconds.set_value]):
rval = self.algorithm.train(dataset=self.dataset)
if rval is not None:
raise ValueError("TrainingAlgorithm.train should not "
"return anything. Use "
"TrainingAlgorithm.continue_learning "
"to control whether learning "
"continues.")
self.model.monitor.report_epoch()
extension_continue = self.run_callbacks_and_monitoring()
if self.save_freq > 0 and \
self.model.monitor._epochs_seen % self.save_freq == 0:
self.save()
continue_learning = (self.algorithm.continue_learning(
self.model) and extension_continue)
assert continue_learning in [True, False, 0, 1]
if not continue_learning:
break
self.model.monitor.training_succeeded = True
if self.save_freq > 0:
self.save()
def get_func(learn_discriminator, learn_generator):
updates = OrderedDict()
assert (learn_discriminator or learn_generator
) and not (learn_discriminator and learn_generator)
if learn_discriminator:
cur_params = model.discriminator.get_params()
else:
cur_params = model.generator.get_params()
cur_grads = OrderedDict()
for param in cur_params:
cur_grads[param] = grads[param]
for param in grads:
if grads[param].name is None and cost_value is not None:
grads[param].name = ('grad(%(costname)s, %(paramname)s)' %
{
'costname': cost_value.name,
'paramname': param.name
})
assert grads[param].dtype == param.dtype
cur_lr_scalers = OrderedDict()
for param in cur_params:
if param in lr_scalers:
lr_scaler = lr_scalers[param]
cur_lr_scalers[param] = lr_scaler
log.info('Parameter and initial learning rate summary:')
for param in cur_params:
param_name = param.name
if param_name is None:
param_name = 'anon_param'
lr = learning_rate.get_value() * cur_lr_scalers.get(param, 1.)
log.info('\t' + param_name + ': ' + str(lr))
if self.learning_rule:
updates.update(
self.learning_rule.get_updates(learning_rate, cur_grads,
cur_lr_scalers))
else:
# Use standard SGD updates with fixed learning rate.
updates.update( dict(safe_zip(params, [param - learning_rate * \
lr_scalers.get(param, 1.) * grads[param]
for param in params])))
for param in cur_params:
if updates[param].name is None:
updates[param].name = 'sgd_update(' + param.name + ')'
model.modify_updates(updates)
for param in cur_params:
update = updates[param]
if update.name is None:
update.name = 'censor(sgd_update(' + param.name + '))'
for update_val in get_debug_values(update):
if np.any(np.isinf(update_val)):
raise ValueError("debug value of %s contains infs" %
update.name)
if np.any(np.isnan(update_val)):
raise ValueError("debug value of %s contains nans" %
update.name)
with log_timing(log, 'Compiling sgd_update'):
return function(theano_args,
updates=updates,
name='sgd_update',
on_unused_input='ignore',
mode=self.theano_function_mode)
