def train(self,
base_path: Union[Path, str],
fix_len=20,
min_freq=2,
buckets=32,
batch_size=5000,
lr=2e-3,
mu=.9,
nu=.9,
epsilon=1e-12,
clip=5.0,
decay=.75,
decay_steps=5000,
patience=100,
max_epochs=10):
r"""
Train any class that implement model interface
Args:
base_path (object): Main path to which all output during training is logged and models are saved
max_epochs: Maximum number of epochs to train. Terminates training if this number is surpassed.
patience:
decay_steps:
decay:
clip:
epsilon:
nu:
mu:
lr:
proj:
tree:
batch_size:
buckets:
min_freq:
fix_len:
"""
################################################################################################################
# BUILD
################################################################################################################
args = Config()
args.feat = self.parser.feat
args.embed = self.parser.embed
os.makedirs(os.path.dirname(base_path), exist_ok=True)
logger.info("Building the fields")
WORD = Field('words', pad=pad, unk=unk, bos=bos, lower=True)
if args.feat == 'char':
FEAT = SubwordField('chars',
pad=pad,
unk=unk,
bos=bos,
fix_len=fix_len)
elif args.feat == 'bert':
from transformers import AutoTokenizer
tokenizer = AutoTokenizer.from_pretrained(args.bert)
args.max_len = min(args.max_len or tokenizer.max_len,
tokenizer.max_len)
FEAT = SubwordField('bert',
pad=tokenizer.pad_token,
unk=tokenizer.unk_token,
bos=tokenizer.bos_token or tokenizer.cls_token,
fix_len=fix_len,
tokenize=tokenizer.tokenize)
FEAT.vocab = tokenizer.get_vocab()
else:
FEAT = Field('tags', bos=bos)
ARC = Field('arcs', bos=bos, use_vocab=False, fn=CoNLL.get_arcs)
REL = Field('rels', bos=bos)
if args.feat in ('char', 'bert'):
transform = CoNLL(FORM=(WORD, FEAT), HEAD=ARC, DEPREL=REL)
else:
transform = CoNLL(FORM=WORD, CPOS=FEAT, HEAD=ARC, DEPREL=REL)
train = Dataset(transform, self.corpus.train)
WORD.build(
train, min_freq,
(Embedding.load(args.embed, unk) if self.parser.embed else None))
FEAT.build(train)
REL.build(train)
args.update({
'n_words': WORD.vocab.n_init,
'n_feats': len(FEAT.vocab),
'n_rels': len(REL.vocab),
'pad_index': WORD.pad_index,
'unk_index': WORD.unk_index,
'bos_index': WORD.bos_index,
'feat_pad_index': FEAT.pad_index,
})
parser = DependencyParser(
n_words=args.n_words,
n_feats=args.n_feats,
n_rels=args.n_feats,
pad_index=args.pad_index,
unk_index=args.unk_index,
# bos_index=args.bos_index,
feat_pad_index=args.feat_pad_index,
transform=transform)
word_field_embeddings = self.parser.embeddings[0]
word_field_embeddings.n_vocab = 1000
parser.embeddings = self.parser.embeddings
parser.embeddings[0] = word_field_embeddings
parser.load_pretrained(WORD.embed).to(device)
################################################################################################################
# TRAIN
################################################################################################################
args = Config()
parser.transform.train()
if dist.is_initialized():
batch_size = batch_size // dist.get_world_size()
logger.info('Loading the data')
train = Dataset(parser.transform, self.corpus.train, **args)
dev = Dataset(parser.transform, self.corpus.dev)
test = Dataset(parser.transform, self.corpus.test)
train.build(batch_size, buckets, True, dist.is_initialized())
dev.build(batch_size, buckets)
test.build(batch_size, buckets)
logger.info(
f"\n{'train:':6} {train}\n{'dev:':6} {dev}\n{'test:':6} {test}\n")
logger.info(f'{parser}')
if dist.is_initialized():
parser = DDP(parser,
device_ids=[dist.get_rank()],
find_unused_parameters=True)
optimizer = Adam(parser.parameters(), lr, (mu, nu), epsilon)
scheduler = ExponentialLR(optimizer, decay**(1 / decay_steps))
elapsed = timedelta()
best_e, best_metric = 1, Metric()
for epoch in range(1, max_epochs + 1):
start = datetime.now()
logger.info(f'Epoch {epoch} / {max_epochs}:')
parser.train()
loader = train.loader
bar, metric = progress_bar(loader), AttachmentMetric()
for words, feats, arcs, rels in bar:
optimizer.zero_grad()
mask = words.ne(parser.WORD.pad_index)
# ignore the first token of each sentence
mask[:, 0] = 0
s_arc, s_rel = parser.forward(words, feats)
loss = parser.forward_loss(s_arc, s_rel, arcs, rels, mask)
loss.backward()
nn.utils.clip_grad_norm_(parser.parameters(), clip)
optimizer.step()
scheduler.step()
arc_preds, rel_preds = parser.decode(s_arc, s_rel, mask)
# ignore all punctuation if not specified
if not self.parser.args['punct']:
mask &= words.unsqueeze(-1).ne(parser.puncts).all(-1)
metric(arc_preds, rel_preds, arcs, rels, mask)
bar.set_postfix_str(
f'lr: {scheduler.get_last_lr()[0]:.4e} - loss: {loss:.4f} - {metric}'
)
loss, dev_metric = parser.evaluate(dev.loader)
logger.info(f"{'dev:':6} - loss: {loss:.4f} - {dev_metric}")
loss, test_metric = parser.evaluate(test.loader)
logger.info(f"{'test:':6} - loss: {loss:.4f} - {test_metric}")
t = datetime.now() - start
# save the model if it is the best so far
if dev_metric > best_metric:
best_e, best_metric = epoch, dev_metric
if is_master():
parser.save(base_path)
logger.info(f'{t}s elapsed (saved)\n')
else:
logger.info(f'{t}s elapsed\n')
elapsed += t
if epoch - best_e >= patience:
break
loss, metric = parser.load(base_path).evaluate(test.loader)
logger.info(f'Epoch {best_e} saved')
logger.info(f"{'dev:':6} - {best_metric}")
logger.info(f"{'test:':6} - {metric}")
logger.info(f'{elapsed}s elapsed, {elapsed / epoch}s/epoch')
from underthesea.models.dependency_parser import DependencyParser
parser = DependencyParser.load('./tmp/resources/parsers/dp')
dataset = parser.predict([[
'Đó', 'là', 'kết quả', 'của', 'cuộc', 'vật lộn', 'bền bỉ', 'gần', '17',
'năm', 'của', 'Huỳnh Đỗi', '.'
]],
verbose=False)
print(dataset.sentences)
def init_parser():
global uts_parser
if not uts_parser:
uts_parser = DependencyParser.load('vi-dp-v1')
return uts_parser
from os.path import join
from underthesea.file_utils import MODELS_FOLDER
from underthesea.models.dependency_parser import DependencyParser
base_path = join(MODELS_FOLDER, 'parsers', 'vi-dp-v1.3.2a2')
parser = DependencyParser.load(base_path)
sentences = [
['Đó', 'là', 'kết quả', 'của', 'cuộc', 'vật lộn', 'bền bỉ', 'gần', '17', 'năm', 'của', 'Huỳnh Đỗi', '.']
]
dataset = parser.predict(sentences)
print(dataset.sentences)