def setup_training(model, train_loader, valid_loader, hps):
"""Does setup before starting training (run_training)"""
train_dir = os.path.join(hps.save_root, "train")
if not os.path.exists(train_dir): os.makedirs(train_dir)
if hps.restore_model != 'None':
logger.info("[INFO] Restoring %s for training...", hps.restore_model)
bestmodel_file = os.path.join(train_dir, hps.restore_model)
loader = ModelLoader()
loader.load_pytorch(model, bestmodel_file)
else:
logger.info("[INFO] Create new model for training...")
try:
run_training(model, train_loader, valid_loader,
hps) # this is an infinite loop until interrupted
except KeyboardInterrupt:
logger.error(
"[Error] Caught keyboard interrupt on worker. Stopping supervisor..."
)
save_file = os.path.join(train_dir, "earlystop.pkl")
saver = ModelSaver(save_file)
saver.save_pytorch(model)
logger.info('[INFO] Saving early stop model to %s', save_file)
def run_training(model, train_loader, valid_loader, hps):
"""Repeatedly runs training iterations, logging loss to screen and writing summaries"""
logger.info("[INFO] Starting run_training")
train_dir = os.path.join(hps.save_root, "train")
if not os.path.exists(train_dir): os.makedirs(train_dir)
eval_dir = os.path.join(hps.save_root, "eval") # make a subdir of the root dir for eval data
if not os.path.exists(eval_dir): os.makedirs(eval_dir)
lr = hps.lr
optimizer = torch.optim.Adam(filter(lambda p: p.requires_grad, model.parameters()), lr=lr)
criterion = MyCrossEntropyLoss(pred = "p_sent", target=Const.TARGET, mask=Const.INPUT_LEN, reduce='none')
# criterion = torch.nn.CrossEntropyLoss(reduce="none")
trainer = Trainer(model=model, train_data=train_loader, optimizer=optimizer, loss=criterion,
n_epochs=hps.n_epochs, print_every=100, dev_data=valid_loader, metrics=[LabelFMetric(pred="prediction"), FastRougeMetric(hps, pred="prediction")],
metric_key="f", validate_every=-1, save_path=eval_dir,
callbacks=[TrainCallback(hps, patience=5)], use_tqdm=False)
train_info = trainer.train(load_best_model=True)
logger.info(' | end of Train | time: {:5.2f}s | '.format(train_info["seconds"]))
logger.info('[INFO] best eval model in epoch %d and iter %d', train_info["best_epoch"], train_info["best_step"])
logger.info(train_info["best_eval"])
bestmodel_save_path = os.path.join(eval_dir, 'bestmodel.pkl') # this is where checkpoints of best models are saved
saver = ModelSaver(bestmodel_save_path)
saver.save_pytorch(model)
logger.info('[INFO] Saving eval best model to %s', bestmodel_save_path)
def train(path):
# Trainer
trainer = Trainer(**train_args.data)
def _define_optim(obj):
lr = optim_args.data['lr']
embed_params = set(obj._model.word_embedding.parameters())
decay_params = set(obj._model.arc_predictor.parameters()) | set(
obj._model.label_predictor.parameters())
params = [
p for p in obj._model.parameters()
if p not in decay_params and p not in embed_params
]
obj._optimizer = torch.optim.Adam([{
'params': list(embed_params),
'lr': lr * 0.1
}, {
'params': list(decay_params),
**optim_args.data
}, {
'params': params
}],
lr=lr,
betas=(0.9, 0.9))
obj._scheduler = torch.optim.lr_scheduler.LambdaLR(
obj._optimizer, lambda ep: max(.75**(ep / 5e4), 0.05))
def _update(obj):
# torch.nn.utils.clip_grad_norm_(obj._model.parameters(), 5.0)
obj._scheduler.step()
obj._optimizer.step()
trainer.define_optimizer = lambda: _define_optim(trainer)
trainer.update = lambda: _update(trainer)
trainer.set_validator(
Tester(**test_args.data, evaluator=ParserEvaluator(ignore_label)))
model.word_embedding = torch.nn.Embedding.from_pretrained(embed,
freeze=False)
model.word_embedding.padding_idx = word_v.padding_idx
model.word_embedding.weight.data[word_v.padding_idx].fill_(0)
model.pos_embedding.padding_idx = pos_v.padding_idx
model.pos_embedding.weight.data[pos_v.padding_idx].fill_(0)
# try:
# ModelLoader.load_pytorch(model, "./save/saved_model.pkl")
# print('model parameter loaded!')
# except Exception as _:
# print("No saved model. Continue.")
# pass
# Start training
trainer.train(model, train_data, dev_data)
print("Training finished!")
# Saver
saver = ModelSaver("./save/saved_model.pkl")
saver.save_pytorch(model)
print("Model saved!")
def trainer(data_folder, write2model, write2vocab):
data_bundle = PeopleDailyNERLoader().load(
data_folder) # 这一行代码将从{data_dir}处读取数据至DataBundle
data_bundle = PeopleDailyPipe().process(data_bundle)
data_bundle.rename_field('chars', 'words')
# 存储vocab
targetVocab = dict(data_bundle.vocabs["target"])
wordsVocab = dict(data_bundle.vocabs["words"])
targetWc = dict(data_bundle.vocabs['target'].word_count)
wordsWc = dict(data_bundle.vocabs['words'].word_count)
with open(write2vocab, "w", encoding="utf-8") as VocabOut:
VocabOut.write(
json.dumps(
{
"targetVocab": targetVocab,
"wordsVocab": wordsVocab,
"targetWc": targetWc,
"wordsWc": wordsWc
},
ensure_ascii=False))
embed = BertEmbedding(vocab=data_bundle.get_vocab('words'),
model_dir_or_name='cn',
requires_grad=False,
auto_truncate=True)
model = BiLSTMCRF(embed=embed,
num_classes=len(data_bundle.get_vocab('target')),
num_layers=1,
hidden_size=100,
dropout=0.5,
target_vocab=data_bundle.get_vocab('target'))
metric = SpanFPreRecMetric(tag_vocab=data_bundle.get_vocab('target'))
optimizer = Adam(model.parameters(), lr=2e-5)
loss = LossInForward()
device = 0 if torch.cuda.is_available() else 'cpu'
# device = "cpu"
trainer = Trainer(data_bundle.get_dataset('train'),
model,
loss=loss,
optimizer=optimizer,
batch_size=8,
dev_data=data_bundle.get_dataset('dev'),
metrics=metric,
device=device,
n_epochs=1)
trainer.train()
tester = Tester(data_bundle.get_dataset('test'), model, metrics=metric)
tester.test()
saver = ModelSaver(write2model)
saver.save_pytorch(model, param_only=False)
def train():
# Config Loader
train_args = ConfigSection()
test_args = ConfigSection()
ConfigLoader().load_config(cfgfile, {
"train": train_args,
"test": test_args
})
print("loading data set...")
data = SeqLabelDataSet(load_func=TokenizeDataSetLoader.load)
data.load(cws_data_path)
data_train, data_dev = data.split(ratio=0.3)
train_args["vocab_size"] = len(data.word_vocab)
train_args["num_classes"] = len(data.label_vocab)
print("vocab size={}, num_classes={}".format(len(data.word_vocab),
len(data.label_vocab)))
change_field_is_target(data_dev, "truth", True)
save_pickle(data_dev, "./save/", "data_dev.pkl")
save_pickle(data.word_vocab, "./save/", "word2id.pkl")
save_pickle(data.label_vocab, "./save/", "label2id.pkl")
# Trainer
trainer = SeqLabelTrainer(epochs=train_args["epochs"],
batch_size=train_args["batch_size"],
validate=train_args["validate"],
use_cuda=train_args["use_cuda"],
pickle_path=train_args["pickle_path"],
save_best_dev=True,
print_every_step=10,
model_name="trained_model.pkl",
evaluator=SeqLabelEvaluator())
# Model
model = AdvSeqLabel(train_args)
try:
ModelLoader.load_pytorch(model, "./save/saved_model.pkl")
print('model parameter loaded!')
except Exception as e:
print("No saved model. Continue.")
pass
# Start training
trainer.train(model, data_train, data_dev)
print("Training finished!")
# Saver
saver = ModelSaver("./save/trained_model.pkl")
saver.save_pytorch(model)
print("Model saved!")
def on_epoch_begin(self, cur_epoch, total_epoch):
if cur_epoch == 1:
self.opt = self.trainer.optimizer # pytorch optimizer
self.opt.param_groups[0]["lr"] = self.start_lr
# save model
ModelSaver("tmp").save_pytorch(self.trainer.model, param_only=True)
self.find = True
def on_exception(self, exception):
if isinstance(exception, KeyboardInterrupt):
logger.error(
"[Error] Caught keyboard interrupt on worker. Stopping supervisor..."
)
train_dir = os.path.join(self._hps.save_root, "train")
save_file = os.path.join(train_dir, "earlystop.pkl")
saver = ModelSaver(save_file)
saver.save_pytorch(self.model)
logger.info('[INFO] Saving early stop model to %s', save_file)
if self.quit_all is True:
sys.exit(0) # 直接退出程序
else:
pass
else:
raise exception # 抛出陌生Error
def on_valid_end(self, eval_result, metric_key, optimizer, is_better_eval):
logger.info(' | end of valid {:3d} | time: {:5.2f}s | '.format(
self.epoch, (time.time() - self.valid_start_time)))
# early stop
if not is_better_eval:
if self.wait == self.patience:
train_dir = os.path.join(self._hps.save_root, "train")
save_file = os.path.join(train_dir, "earlystop.pkl")
saver = ModelSaver(save_file)
saver.save_pytorch(self.model)
logger.info('[INFO] Saving early stop model to %s', save_file)
raise EarlyStopError("Early stopping raised.")
else:
self.wait += 1
else:
self.wait = 0
# lr descent
if self._hps.lr_descent:
new_lr = max(5e-6, self._hps.lr / (self.epoch + 1))
for param_group in list(optimizer.param_groups):
param_group['lr'] = new_lr
logger.info("[INFO] The learning rate now is %f", new_lr)
def run_training(model, train_loader, valid_loader, hps):
"""Repeatedly runs training iterations, logging loss to screen and writing summaries"""
logger.info("[INFO] Starting run_training")
train_dir = os.path.join(hps.save_root, "train")
if not os.path.exists(train_dir): os.makedirs(train_dir)
lr = hps.lr
# optimizer = torch.optim.Adam(filter(lambda p: p.requires_grad, model.parameters()), lr=lr, betas=(0.9, 0.98),
# eps=1e-09)
optimizer = torch.optim.Adam(filter(lambda p: p.requires_grad,
model.parameters()),
lr=lr)
criterion = torch.nn.CrossEntropyLoss(reduction='none')
best_train_loss = None
best_train_F = None
best_loss = None
best_F = None
step_num = 0
non_descent_cnt = 0
for epoch in range(1, hps.n_epochs + 1):
epoch_loss = 0.0
train_loss = 0.0
total_example_num = 0
match, pred, true, match_true = 0.0, 0.0, 0.0, 0.0
epoch_start_time = time.time()
for i, (batch_x, batch_y) in enumerate(train_loader):
# if i > 10:
# break
model.train()
iter_start_time = time.time()
input, input_len = batch_x[Const.INPUT], batch_x[Const.INPUT_LEN]
label = batch_y[Const.TARGET]
# logger.info(batch_x["text"][0])
# logger.info(input[0,:,:])
# logger.info(input_len[0:5,:])
# logger.info(batch_y["summary"][0:5])
# logger.info(label[0:5,:])
# logger.info((len(batch_x["text"][0]), sum(input[0].sum(-1) != 0)))
batch_size, N, seq_len = input.size()
if hps.cuda:
input = input.cuda() # [batch, N, seq_len]
label = label.cuda()
input_len = input_len.cuda()
input = Variable(input)
label = Variable(label)
input_len = Variable(input_len)
model_outputs = model.forward(input, input_len) # [batch, N, 2]
outputs = model_outputs["p_sent"].view(-1, 2)
label = label.view(-1)
loss = criterion(outputs, label) # [batch_size, doc_max_timesteps]
# input_len = input_len.float().view(-1)
loss = loss.view(batch_size, -1)
loss = loss.masked_fill(input_len.eq(0), 0)
loss = loss.sum(1).mean()
logger.debug("loss %f", loss)
if not (np.isfinite(loss.data)).numpy():
logger.error("train Loss is not finite. Stopping.")
logger.info(loss)
for name, param in model.named_parameters():
if param.requires_grad:
logger.info(name)
logger.info(param.grad.data.sum())
raise Exception("train Loss is not finite. Stopping.")
optimizer.zero_grad()
loss.backward()
if hps.grad_clip:
torch.nn.utils.clip_grad_norm_(model.parameters(),
hps.max_grad_norm)
optimizer.step()
step_num += 1
train_loss += float(loss.data)
epoch_loss += float(loss.data)
if i % 100 == 0:
# start debugger
# import pdb; pdb.set_trace()
for name, param in model.named_parameters():
if param.requires_grad:
logger.debug(name)
logger.debug(param.grad.data.sum())
logger.info(
' | end of iter {:3d} | time: {:5.2f}s | train loss {:5.4f} | '
.format(i, (time.time() - iter_start_time),
float(train_loss / 100)))
train_loss = 0.0
# calculate the precision, recall and F
prediction = outputs.max(1)[1]
prediction = prediction.data
label = label.data
pred += prediction.sum()
true += label.sum()
match_true += ((prediction == label) & (prediction == 1)).sum()
match += (prediction == label).sum()
total_example_num += int(batch_size * N)
if hps.lr_descent:
# new_lr = pow(hps.hidden_size, -0.5) * min(pow(step_num, -0.5),
# step_num * pow(hps.warmup_steps, -1.5))
new_lr = max(5e-6, lr / (epoch + 1))
for param_group in list(optimizer.param_groups):
param_group['lr'] = new_lr
logger.info("[INFO] The learning rate now is %f", new_lr)
epoch_avg_loss = epoch_loss / len(train_loader)
logger.info(
' | end of epoch {:3d} | time: {:5.2f}s | epoch train loss {:5.4f} | '
.format(epoch, (time.time() - epoch_start_time),
float(epoch_avg_loss)))
logger.info(
"[INFO] Trainset match_true %d, pred %d, true %d, total %d, match %d",
match_true, pred, true, total_example_num, match)
accu, precision, recall, F = utils.eval_label(match_true, pred, true,
total_example_num, match)
logger.info(
"[INFO] The size of totalset is %d, accu is %f, precision is %f, recall is %f, F is %f",
total_example_num / hps.doc_max_timesteps, accu, precision, recall,
F)
if not best_train_loss or epoch_avg_loss < best_train_loss:
save_file = os.path.join(train_dir, "bestmodel.pkl")
logger.info(
'[INFO] Found new best model with %.3f running_train_loss. Saving to %s',
float(epoch_avg_loss), save_file)
saver = ModelSaver(save_file)
saver.save_pytorch(model)
best_train_loss = epoch_avg_loss
elif epoch_avg_loss > best_train_loss:
logger.error(
"[Error] training loss does not descent. Stopping supervisor..."
)
save_file = os.path.join(train_dir, "earlystop.pkl")
saver = ModelSaver(save_file)
saver.save_pytorch(model)
logger.info('[INFO] Saving early stop model to %s', save_file)
return
if not best_train_F or F > best_train_F:
save_file = os.path.join(train_dir, "bestFmodel.pkl")
logger.info(
'[INFO] Found new best model with %.3f F score. Saving to %s',
float(F), save_file)
saver = ModelSaver(save_file)
saver.save_pytorch(model)
best_train_F = F
best_loss, best_F, non_descent_cnt = run_eval(model, valid_loader, hps,
best_loss, best_F,
non_descent_cnt)
if non_descent_cnt >= 3:
logger.error(
"[Error] val loss does not descent for three times. Stopping supervisor..."
)
save_file = os.path.join(train_dir, "earlystop")
saver = ModelSaver(save_file)
saver.save_pytorch(model)
logger.info('[INFO] Saving early stop model to %s', save_file)
return
def run_eval(model, loader, hps, best_loss, best_F, non_descent_cnt):
"""Repeatedly runs eval iterations, logging to screen and writing summaries. Saves the model with the best loss seen so far."""
logger.info("[INFO] Starting eval for this model ...")
eval_dir = os.path.join(
hps.save_root, "eval") # make a subdir of the root dir for eval data
if not os.path.exists(eval_dir): os.makedirs(eval_dir)
model.eval()
running_loss = 0.0
match, pred, true, match_true = 0.0, 0.0, 0.0, 0.0
pairs = {}
pairs["hyps"] = []
pairs["refer"] = []
total_example_num = 0
criterion = torch.nn.CrossEntropyLoss(reduction='none')
iter_start_time = time.time()
with torch.no_grad():
for i, (batch_x, batch_y) in enumerate(loader):
# if i > 10:
# break
input, input_len = batch_x[Const.INPUT], batch_x[Const.INPUT_LEN]
label = batch_y[Const.TARGET]
if hps.cuda:
input = input.cuda() # [batch, N, seq_len]
label = label.cuda()
input_len = input_len.cuda()
batch_size, N, _ = input.size()
input = Variable(input, requires_grad=False)
label = Variable(label)
input_len = Variable(input_len, requires_grad=False)
model_outputs = model.forward(input, input_len) # [batch, N, 2]
outputs = model_outputs["p_sent"]
prediction = model_outputs["prediction"]
outputs = outputs.view(-1, 2) # [batch * N, 2]
label = label.view(-1) # [batch * N]
loss = criterion(outputs, label)
loss = loss.view(batch_size, -1)
loss = loss.masked_fill(input_len.eq(0), 0)
loss = loss.sum(1).mean()
logger.debug("loss %f", loss)
running_loss += float(loss.data)
label = label.data.view(batch_size, -1)
pred += prediction.sum()
true += label.sum()
match_true += ((prediction == label) & (prediction == 1)).sum()
match += (prediction == label).sum()
total_example_num += batch_size * N
# rouge
prediction = prediction.view(batch_size, -1)
for j in range(batch_size):
original_article_sents = batch_x["text"][j]
sent_max_number = len(original_article_sents)
refer = "\n".join(batch_x["summary"][j])
hyps = "\n".join(
original_article_sents[id]
for id in range(len(prediction[j]))
if prediction[j][id] == 1 and id < sent_max_number)
if sent_max_number < hps.m and len(hyps) <= 1:
logger.error("sent_max_number is too short %d, Skip!",
sent_max_number)
continue
if len(hyps) >= 1 and hyps != '.':
# logger.debug(prediction[j])
pairs["hyps"].append(hyps)
pairs["refer"].append(refer)
elif refer == "." or refer == "":
logger.error("Refer is None!")
logger.debug("label:")
logger.debug(label[j])
logger.debug(refer)
elif hyps == "." or hyps == "":
logger.error("hyps is None!")
logger.debug("sent_max_number:%d", sent_max_number)
logger.debug("prediction:")
logger.debug(prediction[j])
logger.debug(hyps)
else:
logger.error("Do not select any sentences!")
logger.debug("sent_max_number:%d", sent_max_number)
logger.debug(original_article_sents)
logger.debug("label:")
logger.debug(label[j])
continue
running_avg_loss = running_loss / len(loader)
if hps.use_pyrouge:
logger.info("The number of pairs is %d", len(pairs["hyps"]))
logging.getLogger('global').setLevel(logging.WARNING)
if not len(pairs["hyps"]):
logger.error("During testing, no hyps is selected!")
return
if isinstance(pairs["refer"][0], list):
logger.info("Multi Reference summaries!")
scores_all = utils.pyrouge_score_all_multi(pairs["hyps"],
pairs["refer"])
else:
scores_all = utils.pyrouge_score_all(pairs["hyps"], pairs["refer"])
else:
if len(pairs["hyps"]) == 0 or len(pairs["refer"]) == 0:
logger.error("During testing, no hyps is selected!")
return
rouge = Rouge()
scores_all = rouge.get_scores(pairs["hyps"], pairs["refer"], avg=True)
# try:
# scores_all = rouge.get_scores(pairs["hyps"], pairs["refer"], avg=True)
# except ValueError as e:
# logger.error(repr(e))
# scores_all = []
# for idx in range(len(pairs["hyps"])):
# try:
# scores = rouge.get_scores(pairs["hyps"][idx], pairs["refer"][idx])[0]
# scores_all.append(scores)
# except ValueError as e:
# logger.error(repr(e))
# logger.debug("HYPS:\t%s", pairs["hyps"][idx])
# logger.debug("REFER:\t%s", pairs["refer"][idx])
# finally:
# logger.error("During testing, some errors happen!")
# logger.error(len(scores_all))
# exit(1)
logger.info(
'[INFO] End of valid | time: {:5.2f}s | valid loss {:5.4f} | '.format(
(time.time() - iter_start_time), float(running_avg_loss)))
logger.info(
"[INFO] Validset match_true %d, pred %d, true %d, total %d, match %d",
match_true, pred, true, total_example_num, match)
accu, precision, recall, F = utils.eval_label(match_true, pred, true,
total_example_num, match)
logger.info(
"[INFO] The size of totalset is %d, accu is %f, precision is %f, recall is %f, F is %f",
total_example_num / hps.doc_max_timesteps, accu, precision, recall, F)
res = "Rouge1:\n\tp:%.6f, r:%.6f, f:%.6f\n" % (scores_all['rouge-1']['p'], scores_all['rouge-1']['r'], scores_all['rouge-1']['f']) \
+ "Rouge2:\n\tp:%.6f, r:%.6f, f:%.6f\n" % (scores_all['rouge-2']['p'], scores_all['rouge-2']['r'], scores_all['rouge-2']['f']) \
+ "Rougel:\n\tp:%.6f, r:%.6f, f:%.6f\n" % (scores_all['rouge-l']['p'], scores_all['rouge-l']['r'], scores_all['rouge-l']['f'])
logger.info(res)
# If running_avg_loss is best so far, save this checkpoint (early stopping).
# These checkpoints will appear as bestmodel-<iteration_number> in the eval dir
if best_loss is None or running_avg_loss < best_loss:
bestmodel_save_path = os.path.join(
eval_dir, 'bestmodel.pkl'
) # this is where checkpoints of best models are saved
if best_loss is not None:
logger.info(
'[INFO] Found new best model with %.6f running_avg_loss. The original loss is %.6f, Saving to %s',
float(running_avg_loss), float(best_loss), bestmodel_save_path)
else:
logger.info(
'[INFO] Found new best model with %.6f running_avg_loss. The original loss is None, Saving to %s',
float(running_avg_loss), bestmodel_save_path)
saver = ModelSaver(bestmodel_save_path)
saver.save_pytorch(model)
best_loss = running_avg_loss
non_descent_cnt = 0
else:
non_descent_cnt += 1
if best_F is None or best_F < F:
bestmodel_save_path = os.path.join(
eval_dir, 'bestFmodel.pkl'
) # this is where checkpoints of best models are saved
if best_F is not None:
logger.info(
'[INFO] Found new best model with %.6f F. The original F is %.6f, Saving to %s',
float(F), float(best_F), bestmodel_save_path)
else:
logger.info(
'[INFO] Found new best model with %.6f F. The original loss is None, Saving to %s',
float(F), bestmodel_save_path)
saver = ModelSaver(bestmodel_save_path)
saver.save_pytorch(model)
best_F = F
return best_loss, best_F, non_descent_cnt
def save_model(self, save_file):
saver = ModelSaver(save_file)
saver.save_pytorch(self.model)
logger.info('[INFO] Saving model to %s', save_file)