def main(argv, base_tag=None, checkpoint=None, override_namespace=None):
args = parse_args(argv)
if override_namespace:
args.__dict__.update(override_namespace.__dict__)
set_package_verbosity(args.debug)
with logging_block("Set global random seed"):
set_global_random_seed(args.random_seed)
with logging_block("Preprocess data"):
data_collection, meta_data = data_factory.preprocess(args,
return_meta=True)
data_collection.summary()
meta_data.summary()
data_generator = DataGenerator(data_collection.train,
batch_size=args.batch_size)
with logging_block("Prepare Generator"):
generator = generator_factory.create(args, meta_data)
with logging_block("Prepare Generator Trainer"):
trainer = trainer_factory.create(args, meta_data, generator)
trainer.summary()
with logging_block("Prepare Callback"):
if base_tag is None:
base_tag = f"{args.dataset}@{time.strftime('%Y%m%d-%H%M%S')}"
data_generator.callback = CallbackFactory(
trainer=trainer,
generator=generator,
data_collection=data_collection,
meta_data=meta_data,
tags=args.tags + [base_tag],
).create_by_args(args)
with tf.Session(config=get_tf_config_proto(args.jit)) as sess:
if checkpoint:
print(f"Restore from checkpoint: {checkpoint}")
tf.train.Saver().restore(sess, save_path=checkpoint)
data_generator.skip_epochs(int(checkpoint.split('-')[-1]))
else:
tf.global_variables_initializer().run()
for batch_data in data_generator.iter_batch_until(
n_epochs=args.epochs,
logs={'arg_string':
" ".join(argv)}, # for callback.on_train_begin()
):
trainer.fit_batch(batch_data)
def create_generator_updater(self, real_samples, objective):
with logging_block("Generator Optimization:"):
optimizer = generator_factory.create_optimizer(self.args)
objectives = [
objective, *generator_factory.create_regularizers(self.args)
]
with logging_block("Objective:"):
for obj in objectives:
print(obj)
updater = GeneratorUpdater(self.generator, optimizer=optimizer)
for obj in objectives:
updater.add_loss(obj)
updater.build_graph(real_samples)
return updater
def preprocess(self,
corpus_config: CorpusConfig,
return_meta: bool = False):
with logging_block("Prepare text tokenizer..."):
tokenizer = self._create_tokenizer(corpus_config)
with logging_block("Preprocess text corpus..."):
data_collection = self._process_data(tokenizer, corpus_config)
if return_meta:
meta_data = MetaData(
tokenizer=tokenizer,
corpus_config=corpus_config,
cache_dir=self.get_cache_dir(corpus_config),
)
return data_collection, meta_data
else:
return data_collection
def create_objective_updater(self, real_samples, discriminator, loss):
with logging_block("Discriminator Optimization:"):
optimizer = discriminator_factory.create_optimizer(self.args)
objectives = [
loss, *discriminator_factory.create_regularizers(self.args)
]
with logging_block("Objective:"):
for obj in objectives:
print(obj)
updater = DiscriminatorUpdater(discriminator, optimizer=optimizer)
for obj in objectives:
updater.add_loss(obj)
updater.build_graph(
real_samples=real_samples,
fake_samples=self.generator.generate(real_samples.batch_size,
real_samples.maxlen),
)
return updater
def load_pretrained_embeddings(self) -> np.ndarray:
@cache_center.to_npz(self.cache_dir / 'word_vecs.npz')
def load_embeddings():
word_vec_config = self.language_config.load_pretrained_embeddings_msg(
)
return word_vec_config.get_matrix_of_tokens(self.tokenizer.tokens)
with logging_block("Load pretrained embeddings:"):
embeddings = load_embeddings()
print(f"Dimensions: {embeddings.shape[1]}.")
return embeddings
def _process_data(self, tokenizer, corpus_config):
data_collection = DataCollection()
for key, path in corpus_config.path.items():
@cache_center.to_npz(
self.get_cache_dir(corpus_config) / f'{key}_data.npz')
def _process_text_file(filepath) -> np.ndarray:
print(f"Load corpus data from {format_path(filepath)}")
return tokenizer.texts_to_array(with_iter(tqdm_open(filepath)))
with logging_block(f"{key} data:", bullet=False):
ids = _process_text_file(path)
text = list(map(tokenizer.ids_to_text, ids))
text_dataset = TextDataset(ids=ids, text=text)
setattr(data_collection, key, text_dataset)
return data_collection
def _create(
optimizer_id: str,
learning_rate: float,
clip_value: float = None,
clip_norm: float = None,
clip_global_norm: float = None,
weight_decay_rate: float = None,
use_lookahead: bool = False,
**kwargs,
):
optimizer = optimizer_cls_table[optimizer_id](learning_rate, **kwargs)
with logging_block(
f"Optimizer: {format_object(optimizer, learning_rate=learning_rate, **kwargs)}",
):
if clip_value:
print(f"clip_value: {clip_value}")
optimizer = GradientClipping(optimizer,
clip_value,
clip_by='value')
elif clip_norm:
print(f"clip_norm: {clip_norm}")
optimizer = GradientClipping(optimizer, clip_norm, clip_by='norm')
elif clip_global_norm:
print(f"clip_global_norm: {clip_global_norm}")
optimizer = GradientClipping(optimizer,
clip_global_norm,
clip_by='global_norm')
if weight_decay_rate:
print(f"weight_decay_rate: {weight_decay_rate}")
optimizer = WeightDecay(optimizer,
decay_rate=weight_decay_rate *
learning_rate)
if use_lookahead:
print("use_lookahead: True")
optimizer = LookAhead(optimizer)
return optimizer
def create_evaluator(self,
bleu_n_gram: int = None,
fed_sample_size: int = None):
proxy = GeneratorProxy(self.text_generator)
evaluator = DispatchCallback()
evaluator.on_batch_end.attach(
proxy.evaluate_ids(
partial(mean_length, eos_idx=self.meta_data.eos_idx),
sample_size=64,
target_channel='samples',
),
period=10,
)
if bleu_n_gram is not None:
for key, dataset in self.data_collection.items():
with logging_block(f"Building '{key}' data BLEU table..."):
calculater = BLEUCalculator(
dataset.ids,
max_gram=bleu_n_gram,
eos_idx=self.meta_data.eos_idx,
smoothing=SmoothingFunction.fuzz_smoothing,
cache_dir=self.meta_data.cache_dir / f"{key}_BLEU",
verbose=True,
)
evaluator.on_batch_end.attach(
proxy.evaluate_ids(calculater.mean_bleu,
sample_size=64,
target_channel=key),
period=10,
)
def selfbleu(word_ids):
print("Evaluating generated data SelfBLEU...")
print()
return BLEUCalculator.selfbleu(
word_ids,
max_gram=bleu_n_gram,
eos_idx=self.meta_data.eos_idx,
smoothing=SmoothingFunction.fuzz_smoothing,
)
evaluator.on_epoch_end.attach(
proxy.evaluate_ids(
selfbleu,
target_channel='samples',
sample_size=min(10000,
2 * len(self.data_collection.train)),
), )
if fed_sample_size is not None:
for key, dataset in self.data_collection.items():
print(f"Building '{key}' data FED sentence encoder...")
calculator = FEDCalculator(
hub_url=
"https://tfhub.dev/google/universal-sentence-encoder-large/3",
references=random_sample(dataset.texts,
size=fed_sample_size),
)
def fed(texts):
print("Evaluating FED Score ...")
print()
return {
"FED": calculator.calculate_fed_score(candidates=texts)
}
evaluator.on_epoch_end.attach(
proxy.evaluate_text(
fed,
sample_size=fed_sample_size,
target_channel=key,
), )
evaluator.on_batch_end.attach(
proxy.log_samples_command(sample_size=3),
period=100,
)
return evaluator
def summary(self):
with logging_block("Special tokens config:"):
for key, (token, idx) in self._attrs.items():
print(f"{key} token: '{token}', index: {idx}.")
def summary(self):
with logging_block(self.scope):
trainable_params = count_params(self.trainable_variables)
non_trainable_params = count_params(self.non_trainable_variables)
print(f"Trainable params: {trainable_params:>12,}")
print(f"Non-trainable params: {non_trainable_params:>12,}")
def summary(self):
with logging_block("Data summary:"):
for key, array in self.items():
print(f"{key} data contains {len(array)} sentences.")
def summary(self):
with logging_block('Model Summary'):
for updater in self.updaters:
updater.module.summary()
def summary(self):
with logging_block(f"{self.__class__.__name__} summary:"):
print(f"Maxlen: {self.maxlen}.")
print(f"Vocabulary size: {self.vocab_size}.")
self.special_token_config.summary()
