def __init__(self, data_path):
""" See base class """
super(MotorSerialize, self).__init__(data_path)
create_dir(data_path)
if not is_downloaded(data_path):
logger.info('Downloading Motor dataset ...')
urllib.request.urlretrieve(DATA_URL, get_data_path(data_path))
def __init__(self,
model_dir,
models,
outputs,
loss_fn,
l1_reg=None,
l2_reg=None,
clip_gradient=None):
self._model_dir = model_dir
create_dir(model_dir)
self._models = models
self._outputs = outputs
self._l1_reg = l1_reg
self._l2_reg = l2_reg
self._clip_grad = clip_gradient
# Check model names are unique
if len(np.unique([m.get_name() for m in models])) != len(models):
raise ValueError('Models provided should have unique names')
# Log provided models
for m in self._models:
logger.info('Provided model "%s"' % m.get_name())
if not isinstance(loss_fn, LossFn):
raise ValueError("Loss must be a subclass of LossFn")
else:
self._loss_fn = loss_fn
def serialize(self, output_folder, train_ratio, val_ratio, num_threads,
train_shards, val_shards, test_shards):
""" Serializes the data into a Tensorflow recommended
Example proto format
Args:
output_folder: Output folder for the record files.
train_ratio: Ratio of instances in the training data.
If original dataset already split, this is not used.
val_ratio: Ratio of instances in the validation data.
num_threads: Threads to use.
train_shards: Number of files the training set will be split in.
Must be divisible by the number of threads.
val_shards: Number of slices the validation set will be split in.
Must be divisible by the number of threads.
test_shards: Number of slices the testing set will be split in.
Must be divisible by the number of threads.
"""
logger.info("Trying to create dataset into %s" % output_folder)
if train_ratio > 1.0 or train_ratio < 0.0:
raise ValueError('Training ratio must be in interval [0, 1]')
if val_ratio > 1.0 or val_ratio < 0.0:
raise ValueError('Validation ratio must be in interval [0, 1]')
if train_ratio + val_ratio >= 1.0:
raise ValueError('Training and validation ratio exceed 1')
if os.path.exists(output_folder):
raise ValueError('Dataset already exists!')
create_dir(output_folder)
# Read dataset
self.settings.initialize()
# Split according to validation preferences
logger.info('Splitting into training and validation')
train, val, test = \
self.settings.get_validation_indices(train_ratio, val_ratio)
# Create training files
self._store_dataset(train, output_folder, train_shards, num_threads,
do.DataMode.TRAINING)
# Create validation files
self._store_dataset(val, output_folder, val_shards, num_threads,
do.DataMode.VALIDATION)
# Create test files
self._store_dataset(test, output_folder, test_shards, num_threads,
do.DataMode.TEST)
# Store settings
self._store_options(output_folder,
n_training_instances=len(train),
train_ratio=train_ratio,
val_ratio=val_ratio)
# Free resources, if any
self.settings.finalize()
def __init__(self, data_path):
""" See base class """
super(AusSerialize, self).__init__(data_path)
create_dir(data_path)
# On-demand download if it does not exist
if not is_downloaded(data_path):
logger.info('Downloading Australian dataset ...')
download(DATA_URL, get_data_path(data_path))
def __init__(self, data_path):
""" See base class """
super(Cifar10Serialize, self).__init__(data_path)
create_dir(data_path)
if not is_downloaded(data_path):
logger.info('Downloading CIFAR dataset ...')
download(data_path)
def __init__(self, data_path):
""" See base class """
super(SonarSerialize, self).__init__(data_path)
create_dir(data_path)
# On-demand download if it does not exist
if not is_downloaded(data_path):
logger.info('Downloading Sonar dataset ...')
urllib.request.urlretrieve(DATA_URL, get_data_path(data_path))
def __init__(self, data_path):
""" See base class """
super(FashionMnistSerialize, self).__init__(data_path)
create_dir(data_path)
# On-demand download if it does not exist
if not is_downloaded(data_path):
logger.info('Downloading Fashion MNIST dataset ...')
download(TRAIN_DATA_URL, TRAIN_LABELS_URL, data_path)
download(TEST_DATA_URL, TEST_LABELS_URL, data_path)
def serialize_folds(self,
output_folder,
train_ratio,
n_folds,
num_threads,
test_shards,
files_per_fold=1):
""" Serializes the data into a Tensorflow recommended
Example proto format using N folds. Each fold has its own
folder with a certain amount of files.
Args:
output_folder: Output folder for the record files.
train_ratio: Ratio of instances in the training set. The rest
will be included in the test set.
n_folds: Ratio of instances in the training data.
If original dataset already split, this is not used.
num_threads: Number of threads to use.
test_shards: Number of files to use for testing.
files_per_fold: Number of files for each training fold.
"""
logger.info("Trying to create folded dataset into %s" % output_folder)
if os.path.exists(output_folder):
raise ValueError('Dataset already exists!')
create_dir(output_folder)
# Read dataset
self.settings.initialize()
# Split between training and test
train, _, test = \
self.settings.get_validation_indices(train_ratio, 0.0)
# Split training into folds
idx_per_fold = np.array_split(train, n_folds)
for fold in range(n_folds):
self._store_dataset(idx_per_fold[fold], output_folder,
files_per_fold, num_threads,
'training_fold_%d' % fold)
# Save test dataset
self._store_dataset(test, output_folder, test_shards, num_threads,
do.DataMode.TEST)
# Store settings
fold_size = int(len(train) / n_folds)
self._store_options(output_folder,
train_ratio=train_ratio,
fold_size=fold_size,
n_training_instances=fold_size * (n_folds - 1),
n_folds=n_folds)
# Free resources, if any
self.settings.finalize()
def __init__(self, data_path):
""" See base class """
super(QuantumSerialize, self).__init__(data_path)
create_dir(data_path)
if not is_downloaded(data_path):
raise RuntimeError(
'This dataset has been extracted from the KDD Cup 2004. ' +
'In order to process, please proceed to request a copy in ' +
'http://osmot.cs.cornell.edu/kddcup/datasets.html. After ' +
'downloading it, place the extracted content into '
'%s and repeat this operation' % data_path)
def train_and_validate(self,
dataset,
batch_size,
validate_steps,
validate_interval,
patience=2,
steps=None,
max_steps=None,
track_summaries=1,
metrics=[],
gpu_frac=1.0,
workers=1,
mem_dequeing=3,
keep_models=True,
log_steps=10):
""" Trains the network using validation and early stop. Training stops
when the number of successive increases of validation loss reaches the
patience value.
Args:
See train_network for other arguments.
validate_steps: Number of validation steps.
validate_interval: Training steps between validation phases.
patience: Maximum successive number of validation loss increase
that we want to allow.
keep_models: Whether to keep the best model or erase it to save
space. Default is True
Returns
See train_network for returns.
"""
if (steps is not None and validate_interval > steps) or \
(max_steps is not None and validate_interval > max_steps):
raise ValueError('Number of steps must be bigger than validation' +
' interval')
# Create folder for training
training_path = os.path.join(self._model_dir, 'training')
create_dir(training_path)
# Create folder for validation
validation_path = os.path.join(self._model_dir, 'validation')
create_dir(validation_path)
# Training outer loop
initial_counter = None
consecutive, counter = 0, 0
best = (0, np.inf)
end = False
while not end and consecutive < patience:
# Adjust training steps
if steps is not None and initial_counter is not None \
and counter + validate_interval > steps:
train_steps = steps - counter
end = True
else:
train_steps = validate_interval
if not end:
# Train network
step, _, _ = self._train_network(
dataset,
logs_path=self._model_dir,
batch_size=batch_size,
steps=train_steps,
max_steps=max_steps,
metrics=metrics,
track_summaries=track_summaries,
track_models=None,
gpu_frac=gpu_frac,
workers=workers,
mem_dequeing=mem_dequeing,
log_steps=log_steps)
# Set initial step when starting training
if initial_counter is None:
initial_counter = step - train_steps
# Validate using training
_, _ = self._eval_network(dataset,
logs_path=training_path,
batch_size=batch_size,
data_mode=DataMode.TRAINING,
metrics=metrics,
steps=validate_steps,
gpu_frac=gpu_frac,
workers=workers,
mem_dequeing=mem_dequeing)
# Validate using validation
val_loss, _ = self._eval_network(dataset,
logs_path=validation_path,
batch_size=batch_size,
data_mode=DataMode.VALIDATION,
metrics=metrics,
steps=validate_steps,
gpu_frac=gpu_frac,
workers=workers,
mem_dequeing=mem_dequeing)
# Check if max step reached
if max_steps is not None and step >= max_steps:
end = True
# Check validation loss hasn't decreased
if val_loss > best[1]:
logger.warn(
'Validation loss at step %d (%f) is worse than' %
(step, val_loss) +
'best (%f) at step %d for %d time/s in a row. ' %
(best[1], best[0], consecutive))
consecutive += 1
else:
logger.warn('Validation results improved at step' +
'%d.Previous best was %f at step %d and' %
(step, best[1], best[0]) +
'new new best is %f.' % (val_loss))
consecutive = 0
best = (step, val_loss)
# Clear old models
mu.keep_tracked_models(self._model_dir, patience)
# Update counts
counter = step - initial_counter
best_step, best_loss = best
logger.info('Best model found was at step %d with loss %f' %
(best_step, best_loss))
# Clean folder. If keep models is True keep best
# Otherwise keep no model
keep_model = best_step if keep_models is True else None
mu.clean_models(self._model_dir, keep_model)
return best
