def train_unbiased_model(args, biased_batch_probs):
# make opt
opt = vars(args)
opt["num_class"] = len(constant.LABEL_TO_ID)
# load vocab
vocab_file = opt['vocab_dir'] + '/vocab.pkl'
vocab = Vocab(vocab_file, load=True)
opt['vocab_size'] = vocab.size
emb_file = opt['vocab_dir'] + '/embedding.npy'
emb_matrix = np.load(emb_file)
assert emb_matrix.shape[0] == vocab.size
assert emb_matrix.shape[1] == opt['emb_dim']
# load data
print("Loading data from {} with batch size {}...".format(
opt["data_dir"], opt["batch_size"]))
train_batch = DataLoader(
opt["data_dir"] + "/" + args.data_name,
opt["batch_size"],
opt,
vocab,
evaluation=False,
)
dev_batch = DataLoader(opt["data_dir"] + "/dev.json",
opt["batch_size"],
opt,
vocab,
evaluation=True)
model_id = opt["id"] if len(opt["id"]) > 1 else "0" + opt["id"]
model_save_dir = opt["save_dir"] + "/" + model_id
opt["model_save_dir"] = model_save_dir
helper.ensure_dir(model_save_dir, verbose=True)
# save config
helper.save_config(opt, model_save_dir + "/config.json", verbose=True)
vocab.save(model_save_dir + "/vocab.pkl")
file_logger = helper.FileLogger(
model_save_dir + "/" + opt["log"],
header="# epoch\ttrain_loss\tdev_loss\tdev_f1")
# print model info
helper.print_config(opt)
# model
model = RelationModel(opt, emb_matrix=emb_matrix)
id2label = dict([(v, k) for k, v in constant.LABEL_TO_ID.items()])
dev_f1_history = []
current_lr = opt["lr"]
global_step = 0
global_start_time = time.time()
format_str = (
"{}: step {}/{} (epoch {}/{}), loss = {:.6f} ({:.3f} sec/batch), lr: {:.6f}"
)
max_steps = len(train_batch) * opt["num_epoch"]
# start training
for epoch in range(1, opt["num_epoch"] + 1):
train_loss = 0
for i, batch in enumerate(train_batch):
start_time = time.time()
global_step += 1
loss = model.update(batch,
torch.tensor(biased_batch_probs[i]).cuda())
train_loss += loss
if global_step % opt["log_step"] == 0:
duration = time.time() - start_time
print(
format_str.format(
datetime.now(),
global_step,
max_steps,
epoch,
opt["num_epoch"],
loss,
duration,
current_lr,
))
# eval on dev
print("Evaluating on dev set...")
predictions = []
dev_loss = 0
for i, batch in enumerate(dev_batch):
preds, _, loss = model.predict(batch)
predictions += preds
dev_loss += loss
predictions = [id2label[p] for p in predictions]
dev_p, dev_r, dev_f1 = scorer.score(dev_batch.gold(), predictions)
f = open("label.txt", "w+")
f.write(str(dev_batch.gold()))
f.close()
train_loss = (train_loss / train_batch.num_examples * opt["batch_size"]
) # avg loss per batch
dev_loss = dev_loss / dev_batch.num_examples * opt["batch_size"]
print(
"epoch {}: train_loss = {:.6f}, dev_loss = {:.6f}, dev_f1 = {:.4f}"
.format(epoch, train_loss, dev_loss, dev_f1))
file_logger.log("{}\t{:.6f}\t{:.6f}\t{:.4f}".format(
epoch, train_loss, dev_loss, dev_f1))
# save
model_file = model_save_dir + "/checkpoint_epoch_{}.pt".format(epoch)
model.save(model_file, epoch)
if epoch == 1 or dev_f1 > max(dev_f1_history):
copyfile(model_file, model_save_dir + "/best_model.pt")
print("new best model saved.")
if epoch % opt["save_epoch"] != 0:
os.remove(model_file)
# lr schedule
if (len(dev_f1_history) > 10 and dev_f1 <= dev_f1_history[-1]
and opt["optim"] in ["sgd", "adagrad"]):
current_lr *= opt["lr_decay"]
model.update_lr(current_lr)
dev_f1_history += [dev_f1]
print("")
print("Training ended with {} epochs.".format(epoch))
if best_dev_metrics['f1'] <= current_dev_metrics['f1']:
best_dev_metrics = current_dev_metrics
test_metrics_at_best_dev = test_metrics_at_current_dev
print_str = 'Best Dev Metrics |'
for name, value in best_dev_metrics.items():
print_str += ' {}: {} |'.format(name, value)
print(print_str)
print_str = 'Test Metrics at Best Dev |'
for name, value in test_metrics_at_best_dev.items():
print_str += ' {}: {} |'.format(name, value)
print(print_str)
# save
model_file = model_save_dir + '/checkpoint_epoch_{}.pt'.format(epoch)
model.save(model_file, epoch)
if epoch == 1 or dev_f1 > max(dev_f1_history):
copyfile(model_file, model_save_dir + '/best_model.pt')
print("new best model saved.")
if epoch % opt['save_epoch'] != 0:
os.remove(model_file)
# lr schedule
if len(dev_f1_history) > 10 and dev_f1 <= dev_f1_history[-1] and \
opt['optim'] in ['sgd', 'adagrad']:
current_lr *= opt['lr_decay']
model.update_lr(current_lr)
dev_f1_history += [dev_f1]
print("")
def train_model(vocab_params,
train_params,
train_batch,
dev_batch,
model_id=-1):
torch.manual_seed(train_params.seed)
np.random.seed(train_params.seed)
random.seed(train_params.seed)
if train_params.cpu:
train_params.cuda = False
elif train_params.cuda:
torch.cuda.manual_seed(train_params.seed)
# make opt
opt = vars(vocab_params)
print(constant.LABEL_TO_ID)
print(opt)
opt['num_class'] = len(constant.LABEL_TO_ID)
# Combine all the parameters together
opt.update(vars(train_params))
# load vocab
vocab_file = opt['vocab_dir'] + '/vocab.pkl'
vocab = Vocab(vocab_file, load=True)
opt['vocab_size'] = vocab.size
emb_file = opt['vocab_dir'] + '/embedding.npy'
emb_matrix = np.load(emb_file)
assert emb_matrix.shape[0] == vocab.size
assert emb_matrix.shape[1] == opt['emb_dim']
if (model_id == -1):
model_id = opt['id'] if len(opt['id']) > 1 else '0' + opt['id']
model_save_dir = opt['save_dir'] + '/' + model_id
opt['model_save_dir'] = model_save_dir
helper.ensure_dir(model_save_dir, verbose=True)
# save config
helper.save_config(opt, model_save_dir + '/config.json', verbose=True)
vocab.save(model_save_dir + '/vocab.pkl')
file_logger = helper.FileLogger(
model_save_dir + '/' + opt['log'],
header="# epoch\ttrain_loss\tdev_loss\tdev_f1")
# print model info
helper.print_config(opt)
# model
model = RelationModel(opt, emb_matrix=emb_matrix)
id2label = dict([(v, k) for k, v in constant.LABEL_TO_ID.items()])
dev_f1_history = []
current_lr = opt['lr']
global_step = 0
global_start_time = time.time()
format_str = '{}: step {}/{} (epoch {}/{}), loss = {:.6f} ({:.3f} sec/batch), lr: {:.6f}'
max_steps = len(train_batch) * opt['num_epoch']
# start training
for epoch in range(1, opt['num_epoch'] + 1):
train_loss = 0
for i, batch in enumerate(train_batch):
start_time = time.time()
global_step += 1
loss = model.update(batch)
train_loss += loss
if global_step % opt['log_step'] == 0:
duration = time.time() - start_time
print(format_str.format(datetime.now(), global_step, max_steps, epoch,\
opt['num_epoch'], loss, duration, current_lr))
# eval on dev
print("Evaluating on dev set...")
predictions = []
dev_loss = 0
for i, batch in enumerate(dev_batch):
preds, _, loss = model.predict(batch)
predictions += preds
dev_loss += loss
predictions = [id2label[p] for p in predictions]
dev_p, dev_r, dev_f1 = scorer.score(dev_batch.gold(), predictions)
train_loss = train_loss / train_batch.num_examples * opt[
'batch_size'] # avg loss per batch
dev_loss = dev_loss / dev_batch.num_examples * opt['batch_size']
print("epoch {}: train_loss = {:.6f}, dev_loss = {:.6f}, dev_f1 = {:.4f}".format(epoch,\
train_loss, dev_loss, dev_f1))
file_logger.log("{}\t{:.6f}\t{:.6f}\t{:.4f}".format(
epoch, train_loss, dev_loss, dev_f1))
# save
model_file = model_save_dir + '/checkpoint_epoch_{}.pt'.format(epoch)
model.save(model_file, epoch)
if epoch == 1 or dev_f1 > max(dev_f1_history):
copyfile(model_file, model_save_dir + '/best_model.pt')
print("new best model saved.")
if epoch % opt['save_epoch'] != 0:
os.remove(model_file)
# lr schedule
if len(dev_f1_history) > 10 and dev_f1 <= dev_f1_history[-1] and \
opt['optim'] in ['sgd', 'adagrad']:
current_lr *= opt['lr_decay']
model.update_lr(current_lr)
dev_f1_history += [dev_f1]
print("")
print("Training ended with {} epochs.".format(epoch))