def sample(args):
numpy.random.seed(args.random_seed)
if args.debug:
theano.config.compute_test_value = 'warn'
else:
theano.config.compute_test_value = 'off'
with h5py.File(args.model_path, 'r') as state:
print("Reading vocabulary from network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
architecture = Architecture.from_state(state)
network = Network(vocabulary,
architecture,
mode=Network.Mode(minibatch=False))
print("Restoring neural network state.")
network.set_state(state)
print("Building text sampler.")
sys.stdout.flush()
sampler = TextSampler(network)
sequences = sampler.generate(30, args.num_sentences)
for sequence in sequences:
try:
eos_pos = sequence.index('</s>')
sequence = sequence[:eos_pos + 1]
except:
pass
args.output_file.write(' '.join(sequence) + '\n')
def from_file(cls, model_path, mode=None, exclude_unk=False):
"""Reads a model from an HDF5 file.
:type model_path: str
:param model_path: path to a HDF5 model file
:type mode: Network.Mode
:param mode: selects mini-batch or single time step processing
:type exclude_unk: bool
:param exclude_unk: if set to ``True``, sets ``<unk>`` probability to
zero.
"""
with h5py.File(model_path, 'r') as state:
print("Reading vocabulary from network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of words in shortlist:",
vocabulary.num_shortlist_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
architecture = Architecture.from_state(state)
result = cls(architecture,
vocabulary,
mode=mode,
exclude_unk=exclude_unk)
print("Restoring neural network state.")
sys.stdout.flush()
result.set_state(state)
return result
def sample(args):
numpy.random.seed(args.random_seed)
if args.debug:
theano.config.compute_test_value = 'warn'
else:
theano.config.compute_test_value = 'off'
with h5py.File(args.model_path, 'r') as state:
print("Reading vocabulary from network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
architecture = Architecture.from_state(state)
network = Network(vocabulary, architecture,
predict_next_distribution=True)
print("Restoring neural network state.")
network.set_state(state)
print("Building text sampler.")
sys.stdout.flush()
sampler = TextSampler(network)
for i in range(args.num_sentences):
words = sampler.generate()
args.output_file.write('{}: {}\n'.format(
i, ' '.join(words)))
def sample(args):
numpy.random.seed(args.random_seed)
if args.debug:
theano.config.compute_test_value = 'warn'
else:
theano.config.compute_test_value = 'off'
with h5py.File(args.model_path, 'r') as state:
print("Reading vocabulary from network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
architecture = Architecture.from_state(state)
network = Network(architecture, vocabulary, mode=Network.Mode(minibatch=False))
print("Restoring neural network state.")
network.set_state(state)
print("Building text sampler.")
sys.stdout.flush()
sampler = TextSampler(network)
sequences = sampler.generate(30, args.num_sentences)
for sequence in sequences:
try:
eos_pos = sequence.index('</s>')
sequence = sequence[:eos_pos+1]
except:
pass
args.output_file.write(' '.join(sequence) + '\n')
def test_from_state(self):
self.classes_file.seek(0)
vocabulary1 = Vocabulary.from_file(self.classes_file, 'srilm-classes')
f = h5py.File('in-memory.h5', driver='core', backing_store=False)
vocabulary1.get_state(f)
vocabulary2 = Vocabulary.from_state(f)
self.assertTrue(numpy.array_equal(vocabulary1.id_to_word, vocabulary2.id_to_word))
self.assertDictEqual(vocabulary1.word_to_id, vocabulary2.word_to_id)
self.assertTrue(numpy.array_equal(vocabulary1.word_id_to_class_id, vocabulary2.word_id_to_class_id))
self.assertListEqual(list(vocabulary1._word_classes),
list(vocabulary2._word_classes))
def test_from_state(self):
self.classes_file.seek(0)
vocabulary1 = Vocabulary.from_file(self.classes_file, 'srilm-classes')
f = h5py.File('in-memory.h5', driver='core', backing_store=False)
vocabulary1.get_state(f)
vocabulary2 = Vocabulary.from_state(f)
self.assertTrue(numpy.array_equal(vocabulary1.id_to_word,
vocabulary2.id_to_word))
self.assertDictEqual(vocabulary1.word_to_id, vocabulary2.word_to_id)
self.assertTrue(numpy.array_equal(vocabulary1.word_id_to_class_id,
vocabulary2.word_id_to_class_id))
self.assertListEqual(list(vocabulary1._word_classes),
list(vocabulary2._word_classes))
def restoreModel(path):
with h5py.File(path, 'r') as state:
print("Reading vocabulary from network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of words in shortlist:", vocabulary.num_shortlist_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
architecture = Architecture.from_state(state)
network = Network(architecture, vocabulary, mode=Network.Mode(minibatch=False))
print("Restoring neural network state.")
network.set_state(state)
return network
def from_file(cls,
model_path,
mode=None,
exclude_unk=False,
default_device=None):
"""Reads a model from an HDF5 file.
:type model_path: str
:param model_path: path to a HDF5 model file
:type mode: Network.Mode
:param mode: selects mini-batch or single time step processing
:type exclude_unk: bool
:param exclude_unk: if set to ``True``, set ``<unk>`` probability to
zero before normalizing the network outputs
(required to get exact normalization during
inference)
:type default_device: str
:param default_device: default device where to store the shared variables
"""
with h5py.File(model_path, 'r') as state:
logging.info("Reading vocabulary from network state.")
#sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
logging.info("Number of words in vocabulary: {}".format(
vocabulary.num_words()))
logging.info("Number of words in shortlist: {}".format(
vocabulary.num_shortlist_words()))
logging.info("Number of word classes: {}".format(
vocabulary.num_classes()))
logging.info("Building neural network.")
#sys.stdout.flush()
architecture = Architecture.from_state(state)
result = cls(architecture,
vocabulary,
mode=mode,
exclude_unk=exclude_unk,
default_device=default_device)
logging.info("Restoring neural network state.")
result.set_training()
logging.info("Reseting to the neural network to evaluate.")
result.set_state(state)
return result
def sample(args):
"""A function that performs the "theanolm sample" command.
:type args: argparse.Namespace
:param args: a collection of command line arguments
"""
numpy.random.seed(args.random_seed)
if args.debug:
theano.config.compute_test_value = 'warn'
else:
theano.config.compute_test_value = 'off'
with h5py.File(args.model_path, 'r') as state:
logging.info("Reading vocabulary from network state.")
vocabulary = Vocabulary.from_state(state)
logging.info("Number of words in vocabulary: %d",
vocabulary.num_words())
logging.info("Number of words in shortlist: %d",
vocabulary.num_shortlist_words())
logging.info("Number of word classes: %d", vocabulary.num_classes())
logging.info("Building neural network.")
architecture = Architecture.from_state(state)
default_device = get_default_device(args.default_device)
network = Network(architecture,
vocabulary,
mode=Network.Mode(minibatch=False),
default_device=default_device)
logging.info("Restoring neural network state.")
network.set_state(state)
logging.info("Building text sampler.")
sampler = TextSampler(network)
sequences = sampler.generate(args.sentence_length,
args.num_sentences,
seed_sequence=args.seed_sequence)
for sequence in sequences:
try:
eos_pos = sequence.index('</s>')
sequence = sequence[:eos_pos + 1]
except ValueError:
pass
args.output_file.write(' '.join(sequence) + '\n')
def score(args):
with h5py.File(args.model_path, 'r') as state:
print("Reading vocabulary from network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
architecture = Architecture.from_state(state)
network = Network(architecture, vocabulary)
print("Restoring neural network state.")
sys.stdout.flush()
network.set_state(state)
print("Building text scorer.")
sys.stdout.flush()
if args.unk_penalty is None:
ignore_unk = False
unk_penalty = None
elif args.unk_penalty == 0:
ignore_unk = True
unk_penalty = None
else:
ignore_unk = False
unk_penalty = args.unk_penalty
scorer = TextScorer(network, ignore_unk, unk_penalty)
print("Scoring text.")
if args.output == 'perplexity':
_score_text(args.input_file, vocabulary, scorer, args.output_file,
args.log_base, False)
elif args.output == 'word-scores':
_score_text(args.input_file, vocabulary, scorer, args.output_file,
args.log_base, True)
elif args.output == 'utterance-scores':
_score_utterances(args.input_file, vocabulary, scorer, args.output_file,
args.log_base)
else:
print("Invalid output format requested:", args.output)
sys.exit(1)
def __init__(self, model_path):
self.model_path = model_path
numpy.random.seed()
theano.config.compute_test_value = 'off'
with h5py.File(model_path, 'r') as self.state:
print("Reading vocabulary from network state.")
#sys.stdout.flush()
self.vocabulary = Vocabulary.from_state(self.state)
print("Number of words in vocabulary:", self.vocabulary.num_words())
print("Number of words in shortlist:", self.vocabulary.num_shortlist_words())
print("Number of word classes:", self.vocabulary.num_classes())
print("Building neural network.")
#sys.stdout.flush()
self.architecture = Architecture.from_state(self.state)
self.network = Network(self.architecture, self.vocabulary, mode=Network.Mode(minibatch=False))
print("Restoring neural network state.")
self.network.set_state(self.state)
print("Building text sampler.")
#sys.stdout.flush()
self.sampler = TextSampler(self.network)
def score(args):
with h5py.File(args.model_path, 'r') as state:
print("Reading vocabulary from network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
architecture = Architecture.from_state(state)
network = Network(vocabulary, architecture)
print("Restoring neural network state.")
sys.stdout.flush()
network.set_state(state)
print("Building text scorer.")
sys.stdout.flush()
if args.unk_penalty is None:
ignore_unk = False
unk_penalty = None
elif args.unk_penalty == 0:
ignore_unk = True
unk_penalty = None
else:
ignore_unk = False
unk_penalty = args.unk_penalty
scorer = TextScorer(network, ignore_unk, unk_penalty)
print("Scoring text.")
if args.output == 'perplexity':
_score_text(args.input_file, vocabulary, scorer, args.output_file,
args.log_base, False)
elif args.output == 'word-scores':
_score_text(args.input_file, vocabulary, scorer, args.output_file,
args.log_base, True)
elif args.output == 'utterance-scores':
_score_utterances(args.input_file, vocabulary, scorer,
args.output_file, args.log_base)
def train(args):
numpy.random.seed(args.random_seed)
log_file = args.log_file
log_level = getattr(logging, args.log_level.upper(), None)
if not isinstance(log_level, int):
print("Invalid logging level requested:", args.log_level)
sys.exit(1)
log_format = '%(asctime)s %(funcName)s: %(message)s'
if args.log_file == '-':
logging.basicConfig(stream=sys.stdout, format=log_format, level=log_level)
else:
logging.basicConfig(filename=log_file, format=log_format, level=log_level)
if args.debug:
theano.config.compute_test_value = 'warn'
else:
theano.config.compute_test_value = 'off'
theano.config.profile = args.profile
theano.config.profile_memory = args.profile
with h5py.File(args.model_path, 'a', driver='core') as state:
if state.keys():
print("Reading vocabulary from existing network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
elif args.vocabulary is None:
print("Constructing vocabulary from training set.")
sys.stdout.flush()
vocabulary = Vocabulary.from_corpus(args.training_set,
args.num_classes)
for training_file in args.training_set:
training_file.seek(0)
vocabulary.get_state(state)
else:
print("Reading vocabulary from {}.".format(args.vocabulary))
sys.stdout.flush()
with open(args.vocabulary, 'rt', encoding='utf-8') as vocab_file:
vocabulary = Vocabulary.from_file(vocab_file,
args.vocabulary_format)
if args.vocabulary_format == 'classes':
print("Computing class membership probabilities from "
"unigram word counts.")
sys.stdout.flush()
vocabulary.compute_probs(args.training_set)
vocabulary.get_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
if args.architecture == 'lstm300' or args.architecture == 'lstm1500':
architecture = Architecture.from_package(args.architecture)
else:
with open(args.architecture, 'rt', encoding='utf-8') as arch_file:
architecture = Architecture.from_description(arch_file)
network = Network(vocabulary, architecture, profile=args.profile)
sys.stdout.flush()
if args.unk_penalty is None:
ignore_unk = False
unk_penalty = None
elif args.unk_penalty == 0:
ignore_unk = True
unk_penalty = None
else:
ignore_unk = False
unk_penalty = args.unk_penalty
num_training_files = len(args.training_set)
if len(args.weights) > num_training_files:
print("You specified more weights than training files.")
sys.exit(1)
weights = numpy.ones(num_training_files).astype(theano.config.floatX)
for index, weight in enumerate(args.weights):
weights[index] = weight
print("Building text scorer.")
scorer = TextScorer(network, ignore_unk, unk_penalty, args.profile)
validation_mmap = mmap.mmap(args.validation_file.fileno(),
0,
prot=mmap.PROT_READ)
validation_iter = \
LinearBatchIterator(validation_mmap,
vocabulary,
batch_size=args.batch_size,
max_sequence_length=None)
optimization_options = {
'method': args.optimization_method,
'epsilon': args.numerical_stability_term,
'gradient_decay_rate': args.gradient_decay_rate,
'sqr_gradient_decay_rate': args.sqr_gradient_decay_rate,
'learning_rate': args.learning_rate,
'weights': weights,
'momentum': args.momentum,
'max_gradient_norm': args.gradient_normalization,
'cost_function': args.cost,
'num_noise_samples': args.num_noise_samples,
'ignore_unk': ignore_unk,
'unk_penalty': unk_penalty
}
logging.debug("OPTIMIZATION OPTIONS")
for option_name, option_value in optimization_options.items():
if type(option_value) is list:
value_str = ', '.join(str(x) for x in option_value)
logging.debug("%s: [%s]", option_name, value_str)
else:
logging.debug("%s: %s", option_name, str(option_value))
training_options = {
'strategy': args.training_strategy,
'batch_size': args.batch_size,
'sequence_length': args.sequence_length,
'validation_frequency': args.validation_frequency,
'patience': args.patience,
'stopping_criterion': args.stopping_criterion,
'max_epochs': args.max_epochs,
'min_epochs': args.min_epochs,
'max_annealing_count': args.max_annealing_count
}
logging.debug("TRAINING OPTIONS")
for option_name, option_value in training_options.items():
logging.debug("%s: %s", option_name, str(option_value))
print("Building neural network trainer.")
sys.stdout.flush()
if len(args.sampling) > len(args.training_set):
print("You specified more sampling coefficients than training "
"files.")
sys.exit(1)
trainer = create_trainer(
training_options, optimization_options,
network, vocabulary, scorer,
args.training_set, args.sampling, validation_iter,
state, args.profile)
trainer.set_logging(args.log_interval)
print("Training neural network.")
sys.stdout.flush()
trainer.train()
if not 'layers' in state.keys():
print("The model has not been trained. No cross-validations were "
"performed or training did not improve the model.")
else:
network.set_state(state)
perplexity = scorer.compute_perplexity(validation_iter)
print("Best validation set perplexity:", perplexity)
def _read_vocabulary(args, state):
"""If ``state`` contains data, reads the vocabulary from the HDF5 state.
Otherwise reads a vocabulary file or constructs the vocabulary from the
training set and writes it to the HDF5 state.
If the state does not contain data and --vocabulary argument is given, reads
the vocabulary from the file given after the argument. The rest of the words
in the training set will be added as out-of-shortlist words.
If the state does not contain data and no vocabulary is given, constructs a
vocabulary that contains all the training set words. In that case,
--num-classes argument can be used to control the number of classes.
:type args: argparse.Namespace
:param args: a collection of command line arguments
:type state: hdf5.File
:param state: HDF5 file where the vocabulary should be saved
:rtype: Vocabulary
:returns: the created vocabulary
"""
if state.keys():
print("Reading vocabulary from existing network state.")
sys.stdout.flush()
result = Vocabulary.from_state(state)
if not result.has_unigram_probs():
# This is for backward compatibility. Remove at some point.
print("Computing unigram word probabilities from training set.")
sys.stdout.flush()
word_counts = compute_word_counts(args.training_set)
shortlist_words = list(result.id_to_word)
shortlist_set = set(shortlist_words)
oos_words = [
x for x in word_counts.keys() if x not in shortlist_set
]
result.id_to_word = numpy.asarray(shortlist_words + oos_words,
dtype=object)
result.word_to_id = {
word: word_id
for word_id, word in enumerate(result.id_to_word)
}
result.compute_probs(word_counts, update_class_probs=False)
result.get_state(state)
elif args.vocabulary is None:
print("Constructing vocabulary from training set.")
sys.stdout.flush()
word_counts = compute_word_counts(args.training_set)
result = Vocabulary.from_word_counts(word_counts, args.num_classes)
result.get_state(state)
else:
print("Reading vocabulary from {}.".format(args.vocabulary))
sys.stdout.flush()
word_counts = compute_word_counts(args.training_set)
oos_words = word_counts.keys()
with open(args.vocabulary, 'rt', encoding='utf-8') as vocab_file:
result = Vocabulary.from_file(vocab_file,
args.vocabulary_format,
oos_words=oos_words)
if args.vocabulary_format == 'classes':
print("Computing class membership probabilities and unigram "
"probabilities for out-of-shortlist words.")
sys.stdout.flush()
update_class_probs = True
else:
print(
"Computing unigram probabilities for out-of-shortlist words.")
sys.stdout.flush()
update_class_probs = False
result.compute_probs(word_counts,
update_class_probs=update_class_probs)
result.get_state(state)
print("Number of words in vocabulary:", result.num_words())
print("Number of words in shortlist:", result.num_shortlist_words())
print("Number of word classes:", result.num_classes())
return result
def train(args):
numpy.random.seed(args.random_seed)
log_file = args.log_file
log_level = getattr(logging, args.log_level.upper(), None)
if not isinstance(log_level, int):
raise ValueError("Invalid logging level requested: " + args.log_level)
log_format = '%(asctime)s %(funcName)s: %(message)s'
if args.log_file == '-':
logging.basicConfig(stream=sys.stdout, format=log_format, level=log_level)
else:
logging.basicConfig(filename=log_file, format=log_format, level=log_level)
if args.debug:
theano.config.compute_test_value = 'warn'
else:
theano.config.compute_test_value = 'off'
theano.config.profile = args.profile
theano.config.profile_memory = args.profile
with h5py.File(args.model_path, 'a', driver='core') as state:
if state.keys():
print("Reading vocabulary from existing network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
elif args.vocabulary is None:
print("Constructing vocabulary from training set.")
sys.stdout.flush()
vocabulary = Vocabulary.from_corpus(args.training_set,
args.num_classes)
for training_file in args.training_set:
training_file.seek(0)
vocabulary.get_state(state)
else:
print("Reading vocabulary from {}.".format(args.vocabulary))
sys.stdout.flush()
with open(args.vocabulary, 'rt', encoding='utf-8') as vocab_file:
vocabulary = Vocabulary.from_file(vocab_file,
args.vocabulary_format)
if args.vocabulary_format == 'classes':
print("Computing class membership probabilities from "
"unigram word counts.")
sys.stdout.flush()
vocabulary.compute_probs(args.training_set)
vocabulary.get_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
if args.architecture == 'lstm300' or args.architecture == 'lstm1500':
architecture = Architecture.from_package(args.architecture)
else:
with open(args.architecture, 'rt', encoding='utf-8') as arch_file:
architecture = Architecture.from_description(arch_file)
network = Network(vocabulary, architecture, profile=args.profile)
sys.stdout.flush()
if args.unk_penalty is None:
ignore_unk = False
unk_penalty = None
elif args.unk_penalty == 0:
ignore_unk = True
unk_penalty = None
else:
ignore_unk = False
unk_penalty = args.unk_penalty
num_training_files = len(args.training_set)
if len(args.weights) > num_training_files:
print("You specified more weights than training files.")
sys.exit(1)
weights = numpy.ones(num_training_files).astype(theano.config.floatX)
for index, weight in enumerate(args.weights):
weights[index] = weight
print("Building text scorer.")
scorer = TextScorer(network, ignore_unk, unk_penalty, args.profile)
validation_mmap = mmap.mmap(args.validation_file.fileno(),
0,
prot=mmap.PROT_READ)
validation_iter = LinearBatchIterator(validation_mmap,
vocabulary,
batch_size=32)
optimization_options = {
'method': args.optimization_method,
'epsilon': args.numerical_stability_term,
'gradient_decay_rate': args.gradient_decay_rate,
'sqr_gradient_decay_rate': args.sqr_gradient_decay_rate,
'learning_rate': args.learning_rate,
'weights': weights,
'momentum': args.momentum,
'max_gradient_norm': args.gradient_normalization,
'ignore_unk': ignore_unk,
'unk_penalty': unk_penalty
}
logging.debug("OPTIMIZATION OPTIONS")
for option_name, option_value in optimization_options.items():
if type(option_value) is list:
value_str = ', '.join(str(x) for x in option_value)
logging.debug("%s: [%s]", option_name, value_str)
else:
logging.debug("%s: %s", option_name, str(option_value))
training_options = {
'strategy': args.training_strategy,
'batch_size': args.batch_size,
'sequence_length': args.sequence_length,
'validation_frequency': args.validation_frequency,
'patience': args.patience,
'stopping_criterion': args.stopping_criterion,
'max_epochs': args.max_epochs,
'min_epochs': args.min_epochs,
'max_annealing_count': args.max_annealing_count
}
logging.debug("TRAINING OPTIONS")
for option_name, option_value in training_options.items():
logging.debug("%s: %s", option_name, str(option_value))
print("Building neural network trainer.")
sys.stdout.flush()
if len(args.sampling) > len(args.training_set):
print("You specified more sampling coefficients than training "
"files.")
sys.exit(1)
trainer = create_trainer(
training_options, optimization_options,
network, vocabulary, scorer,
args.training_set, args.sampling, validation_iter,
state, args.profile)
trainer.set_logging(args.log_interval)
print("Training neural network.")
sys.stdout.flush()
trainer.run()
if not state.keys():
print("The model has not been trained.")
else:
network.set_state(state)
perplexity = scorer.compute_perplexity(validation_iter)
print("Best validation set perplexity:", perplexity)
def decode(args):
log_file = args.log_file
log_level = getattr(logging, args.log_level.upper(), None)
if not isinstance(log_level, int):
print("Invalid logging level requested:", args.log_level)
sys.exit(1)
log_format = '%(asctime)s %(funcName)s: %(message)s'
if args.log_file == '-':
logging.basicConfig(stream=sys.stdout, format=log_format, level=log_level)
else:
logging.basicConfig(filename=log_file, format=log_format, level=log_level)
if args.debug:
theano.config.compute_test_value = 'warn'
else:
theano.config.compute_test_value = 'off'
theano.config.profile = args.profile
theano.config.profile_memory = args.profile
with h5py.File(args.model_path, 'r') as state:
print("Reading vocabulary from network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
architecture = Architecture.from_state(state)
network = Network(architecture, vocabulary,
mode=Network.Mode(minibatch=False))
print("Restoring neural network state.")
sys.stdout.flush()
network.set_state(state)
log_scale = 1.0 if args.log_base is None else numpy.log(args.log_base)
if args.wi_penalty is None:
wi_penalty = None
else:
wi_penalty = args.wi_penalty * log_scale
if args.unk_penalty is None:
ignore_unk = False
unk_penalty = None
elif args.unk_penalty == 0:
ignore_unk = True
unk_penalty = None
else:
ignore_unk = False
unk_penalty = args.unk_penalty
decoding_options = {
'nnlm_weight': args.nnlm_weight,
'lm_scale': args.lm_scale,
'wi_penalty': wi_penalty,
'ignore_unk': ignore_unk,
'unk_penalty': unk_penalty,
'linear_interpolation': args.linear_interpolation,
'max_tokens_per_node': args.max_tokens_per_node,
'beam': args.beam,
'recombination_order': args.recombination_order
}
logging.debug("DECODING OPTIONS")
for option_name, option_value in decoding_options.items():
logging.debug("%s: %s", option_name, str(option_value))
print("Building word lattice decoder.")
sys.stdout.flush()
decoder = LatticeDecoder(network, decoding_options)
# Combine paths from command line and lattice list.
lattices = args.lattices
lattices.extend(args.lattice_list.readlines())
lattices = [path.strip() for path in lattices]
# Ignore empty lines in the lattice list.
lattices = list(filter(None, lattices))
# Pick every Ith lattice, if --num-jobs is specified and > 1.
if args.num_jobs < 1:
print("Invalid number of jobs specified:", args.num_jobs)
sys.exit(1)
if (args.job < 0) or (args.job > args.num_jobs - 1):
print("Invalid job specified:", args.job)
sys.exit(1)
lattices = lattices[args.job::args.num_jobs]
file_type = TextFileType('r')
for index, path in enumerate(lattices):
logging.info("Reading word lattice: %s", path)
lattice_file = file_type(path)
lattice = SLFLattice(lattice_file)
if not lattice.utterance_id is None:
utterance_id = lattice.utterance_id
else:
utterance_id = os.path.basename(lattice_file.name)
logging.info("Utterance `%s' -- %d/%d of job %d",
utterance_id,
index + 1,
len(lattices),
args.job)
tokens = decoder.decode(lattice)
for index in range(min(args.n_best, len(tokens))):
line = format_token(tokens[index],
utterance_id,
vocabulary,
log_scale,
args.output)
args.output_file.write(line + "\n")
def decode(args):
log_file = args.log_file
log_level = getattr(logging, args.log_level.upper(), None)
if not isinstance(log_level, int):
print("Invalid logging level requested:", args.log_level)
sys.exit(1)
log_format = '%(asctime)s %(funcName)s: %(message)s'
if args.log_file == '-':
logging.basicConfig(stream=sys.stdout,
format=log_format,
level=log_level)
else:
logging.basicConfig(filename=log_file,
format=log_format,
level=log_level)
if args.debug:
theano.config.compute_test_value = 'warn'
else:
theano.config.compute_test_value = 'off'
theano.config.profile = args.profile
theano.config.profile_memory = args.profile
with h5py.File(args.model_path, 'r') as state:
print("Reading vocabulary from network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of word classes:", vocabulary.num_classes())
print("Building neural network.")
sys.stdout.flush()
architecture = Architecture.from_state(state)
network = Network(vocabulary,
architecture,
mode=Network.Mode.target_words)
print("Restoring neural network state.")
sys.stdout.flush()
network.set_state(state)
log_scale = 1.0 if args.log_base is None else numpy.log(args.log_base)
if args.wi_penalty is None:
wi_penalty = None
else:
wi_penalty = args.wi_penalty * log_scale
if args.unk_penalty is None:
ignore_unk = False
unk_penalty = None
elif args.unk_penalty == 0:
ignore_unk = True
unk_penalty = None
else:
ignore_unk = False
unk_penalty = args.unk_penalty
decoding_options = {
'nnlm_weight': args.nnlm_weight,
'lm_scale': args.lm_scale,
'wi_penalty': wi_penalty,
'ignore_unk': ignore_unk,
'unk_penalty': unk_penalty,
'linear_interpolation': args.linear_interpolation,
'max_tokens_per_node': args.max_tokens_per_node,
'beam': args.beam,
'recombination_order': args.recombination_order
}
logging.debug("DECODING OPTIONS")
for option_name, option_value in decoding_options.items():
logging.debug("%s: %s", option_name, str(option_value))
print("Building word lattice decoder.")
sys.stdout.flush()
decoder = LatticeDecoder(network, decoding_options)
# Combine paths from command line and lattice list.
lattices = args.lattices
lattices.extend(args.lattice_list.readlines())
lattices = [path.strip() for path in lattices]
# Ignore empty lines in the lattice list.
lattices = list(filter(None, lattices))
# Pick every Ith lattice, if --num-jobs is specified and > 1.
if args.num_jobs < 1:
print("Invalid number of jobs specified:", args.num_jobs)
sys.exit(1)
if (args.job < 0) or (args.job > args.num_jobs - 1):
print("Invalid job specified:", args.job)
sys.exit(1)
lattices = lattices[args.job::args.num_jobs]
file_type = TextFileType('r')
for index, path in enumerate(lattices):
logging.info("Reading word lattice: %s", path)
lattice_file = file_type(path)
lattice = SLFLattice(lattice_file)
if not lattice.utterance_id is None:
utterance_id = lattice.utterance_id
else:
utterance_id = os.path.basename(lattice_file.name)
logging.info("Utterance `%s' -- %d/%d of job %d", utterance_id,
index + 1, len(lattices), args.job)
tokens = decoder.decode(lattice)
for index in range(min(args.n_best, len(tokens))):
line = format_token(tokens[index], utterance_id, vocabulary,
log_scale, args.output)
args.output_file.write(line + "\n")
def train(args):
numpy.random.seed(args.random_seed)
log_file = args.log_file
log_level = getattr(logging, args.log_level.upper(), None)
if not isinstance(log_level, int):
print("Invalid logging level requested:", args.log_level)
sys.exit(1)
log_format = "%(asctime)s %(funcName)s: %(message)s"
if args.log_file == "-":
logging.basicConfig(stream=sys.stdout, format=log_format, level=log_level)
else:
logging.basicConfig(filename=log_file, format=log_format, level=log_level)
if args.debug:
theano.config.compute_test_value = "warn"
print("Enabled computing test values for tensor variables.")
print("Warning: GpuArray backend will fail random number generation!")
else:
theano.config.compute_test_value = "off"
theano.config.profile = args.profile
theano.config.profile_memory = args.profile
with h5py.File(args.model_path, "a", driver="core") as state:
if state.keys():
print("Reading vocabulary from existing network state.")
sys.stdout.flush()
vocabulary = Vocabulary.from_state(state)
elif args.vocabulary is None:
print("Constructing vocabulary from training set.")
sys.stdout.flush()
vocabulary = Vocabulary.from_corpus(args.training_set, args.num_classes)
for training_file in args.training_set:
training_file.seek(0)
vocabulary.get_state(state)
else:
print("Reading vocabulary from {}.".format(args.vocabulary))
sys.stdout.flush()
with open(args.vocabulary, "rt", encoding="utf-8") as vocab_file:
vocabulary = Vocabulary.from_file(vocab_file, args.vocabulary_format)
if args.vocabulary_format == "classes":
print("Computing class membership probabilities from " "unigram word counts.")
sys.stdout.flush()
vocabulary.compute_probs(args.training_set)
vocabulary.get_state(state)
print("Number of words in vocabulary:", vocabulary.num_words())
print("Number of word classes:", vocabulary.num_classes())
if args.num_noise_samples > vocabulary.num_classes():
print(
"Number of noise samples ({}) is larger than the number of "
"classes. This doesn't make sense and would cause sampling "
"to fail.".format(args.num_noise_samples)
)
sys.exit(1)
if args.unk_penalty is None:
ignore_unk = False
unk_penalty = None
elif args.unk_penalty == 0:
ignore_unk = True
unk_penalty = None
else:
ignore_unk = False
unk_penalty = args.unk_penalty
num_training_files = len(args.training_set)
if len(args.weights) > num_training_files:
print("You specified more weights than training files.")
sys.exit(1)
weights = numpy.ones(num_training_files).astype(theano.config.floatX)
for index, weight in enumerate(args.weights):
weights[index] = weight
training_options = {
"batch_size": args.batch_size,
"sequence_length": args.sequence_length,
"validation_frequency": args.validation_frequency,
"patience": args.patience,
"stopping_criterion": args.stopping_criterion,
"max_epochs": args.max_epochs,
"min_epochs": args.min_epochs,
"max_annealing_count": args.max_annealing_count,
}
logging.debug("TRAINING OPTIONS")
for option_name, option_value in training_options.items():
logging.debug("%s: %s", option_name, str(option_value))
optimization_options = {
"method": args.optimization_method,
"epsilon": args.numerical_stability_term,
"gradient_decay_rate": args.gradient_decay_rate,
"sqr_gradient_decay_rate": args.sqr_gradient_decay_rate,
"learning_rate": args.learning_rate,
"weights": weights,
"momentum": args.momentum,
"max_gradient_norm": args.gradient_normalization,
"cost_function": args.cost,
"num_noise_samples": args.num_noise_samples,
"noise_sharing": args.noise_sharing,
"ignore_unk": ignore_unk,
"unk_penalty": unk_penalty,
}
logging.debug("OPTIMIZATION OPTIONS")
for option_name, option_value in optimization_options.items():
if type(option_value) is list:
value_str = ", ".join(str(x) for x in option_value)
logging.debug("%s: [%s]", option_name, value_str)
else:
logging.debug("%s: %s", option_name, str(option_value))
if len(args.sampling) > len(args.training_set):
print("You specified more sampling coefficients than training " "files.")
sys.exit(1)
print("Creating trainer.")
sys.stdout.flush()
trainer = Trainer(training_options, vocabulary, args.training_set, args.sampling)
trainer.set_logging(args.log_interval)
print("Building neural network.")
sys.stdout.flush()
if args.architecture == "lstm300" or args.architecture == "lstm1500":
architecture = Architecture.from_package(args.architecture)
else:
with open(args.architecture, "rt", encoding="utf-8") as arch_file:
architecture = Architecture.from_description(arch_file)
network = Network(
architecture,
vocabulary,
trainer.class_prior_probs,
args.noise_dampening,
default_device=args.default_device,
profile=args.profile,
)
print("Compiling optimization function.")
sys.stdout.flush()
optimizer = create_optimizer(optimization_options, network, device=args.default_device, profile=args.profile)
if args.print_graph:
print("Cost function computation graph:")
theano.printing.debugprint(optimizer.gradient_update_function)
trainer.initialize(network, state, optimizer)
if not args.validation_file is None:
print("Building text scorer for cross-validation.")
sys.stdout.flush()
scorer = TextScorer(network, ignore_unk, unk_penalty, args.profile)
print("Validation text:", args.validation_file.name)
validation_mmap = mmap.mmap(args.validation_file.fileno(), 0, prot=mmap.PROT_READ)
validation_iter = LinearBatchIterator(
validation_mmap, vocabulary, batch_size=args.batch_size, max_sequence_length=None
)
trainer.set_validation(validation_iter, scorer)
else:
print("Cross-validation will not be performed.")
validation_iter = None
print("Training neural network.")
sys.stdout.flush()
trainer.train()
if not "layers" in state.keys():
print(
"The model has not been trained. No cross-validations were "
"performed or training did not improve the model."
)
elif not validation_iter is None:
network.set_state(state)
perplexity = scorer.compute_perplexity(validation_iter)
print("Best validation set perplexity:", perplexity)
