def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset,
batch_size=args.train_batch_size,
shuffle=True,
num_workers=2)
global best_dev
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
adversarial_loss = torch.nn.BCELoss().to(device)
adversarial_loss_v2 = torch.nn.CrossEntropyLoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss().to(device)
# Optimizers
optimizer_G = torch.optim.Adam(G.parameters(),
lr=args.G_lr) # optimizer for generator
optimizer_D = torch.optim.Adam(
D.parameters(), lr=args.D_lr) # optimizer for discriminator
optimizer_E = AdamW(E.parameters(), args.bert_lr)
optimizer_detector = torch.optim.Adam(detector.parameters(),
lr=args.detector_lr)
G_total_train_loss = []
D_total_fake_loss = []
D_total_real_loss = []
FM_total_train_loss = []
D_total_class_loss = []
valid_detection_loss = []
valid_oos_ind_precision = []
valid_oos_ind_recall = []
valid_oos_ind_f_score = []
detector_total_train_loss = []
all_features = []
result = dict()
for i in range(args.n_epoch):
# Initialize model state
G.train()
D.train()
E.train()
detector.train()
G_train_loss = 0
D_fake_loss = 0
D_real_loss = 0
FM_train_loss = 0
D_class_loss = 0
detector_train_loss = 0
for sample in tqdm.tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
ood_sample = (y == 0.0)
# weight = torch.ones(len(ood_sample)).to(device) - ood_sample * args.beta
# real_loss_func = torch.nn.BCELoss(weight=weight).to(device)
# the label used to train generator and discriminator.
valid_label = FloatTensor(batch, 1).fill_(1.0).detach()
fake_label = FloatTensor(batch, 1).fill_(0.0).detach()
optimizer_E.zero_grad()
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
# train D on real
optimizer_D.zero_grad()
real_f_vector, discriminator_output, classification_output = D(
real_feature, return_feature=True)
# discriminator_output = discriminator_output.squeeze()
real_loss = adversarial_loss(discriminator_output, valid_label)
real_loss.backward(retain_graph=True)
if args.do_vis:
all_features.append(real_f_vector.detach())
# # train D on fake
if args.model == 'lstm_gan' or args.model == 'cnn_gan':
z = FloatTensor(
np.random.normal(0, 1,
(batch, 32, args.G_z_dim))).to(device)
else:
z = FloatTensor(
np.random.normal(0, 1,
(batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
fake_discriminator_output = D.detect_only(fake_feature)
fake_loss = adversarial_loss(fake_discriminator_output,
fake_label)
fake_loss.backward()
optimizer_D.step()
# if args.fine_tune:
# optimizer_E.step()
# train G
optimizer_G.zero_grad()
if args.model == 'lstm_gan' or args.model == 'cnn_gan':
z = FloatTensor(
np.random.normal(0, 1,
(batch, 32, args.G_z_dim))).to(device)
else:
z = FloatTensor(
np.random.normal(0, 1,
(batch, args.G_z_dim))).to(device)
fake_f_vector, D_decision = D.detect_only(G(z),
return_feature=True)
gd_loss = adversarial_loss(D_decision, valid_label)
fm_loss = torch.abs(
torch.mean(real_f_vector.detach(), 0) -
torch.mean(fake_f_vector, 0)).mean()
g_loss = gd_loss + 0 * fm_loss
g_loss.backward()
optimizer_G.step()
optimizer_E.zero_grad()
# train detector
optimizer_detector.zero_grad()
if args.model == 'lstm_gan' or args.model == 'cnn_gan':
z = FloatTensor(
np.random.normal(0, 1,
(batch, 32, args.G_z_dim))).to(device)
else:
z = FloatTensor(
np.random.normal(0, 1,
(batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
if args.loss == 'v1':
loss_fake = adversarial_loss(
detector(fake_feature),
fake_label) # fake sample is ood
else:
loss_fake = adversarial_loss_v2(
detector(fake_feature),
fake_label.long().squeeze())
if args.loss == 'v1':
loss_real = adversarial_loss(detector(real_feature),
y.float())
else:
loss_real = adversarial_loss_v2(detector(real_feature),
y.long())
if args.detect_loss == 'v1':
detector_loss = args.beta * loss_fake + (
1 - args.beta) * loss_real
else:
detector_loss = args.beta * loss_fake + loss_real
detector_loss = args.sigma * detector_loss
detector_loss.backward()
optimizer_detector.step()
if args.fine_tune:
optimizer_E.step()
global_step += 1
D_fake_loss += fake_loss.detach()
D_real_loss += real_loss.detach()
G_train_loss += g_loss.detach() + fm_loss.detach()
FM_train_loss += fm_loss.detach()
detector_train_loss += detector_loss
logger.info('[Epoch {}] Train: D_fake_loss: {}'.format(
i, D_fake_loss / n_sample))
logger.info('[Epoch {}] Train: D_real_loss: {}'.format(
i, D_real_loss / n_sample))
logger.info('[Epoch {}] Train: D_class_loss: {}'.format(
i, D_class_loss / n_sample))
logger.info('[Epoch {}] Train: G_train_loss: {}'.format(
i, G_train_loss / n_sample))
logger.info('[Epoch {}] Train: FM_train_loss: {}'.format(
i, FM_train_loss / n_sample))
logger.info('[Epoch {}] Train: detector_train_loss: {}'.format(
i, detector_train_loss / n_sample))
logger.info(
'---------------------------------------------------------------------------'
)
D_total_fake_loss.append(D_fake_loss / n_sample)
D_total_real_loss.append(D_real_loss / n_sample)
D_total_class_loss.append(D_class_loss / n_sample)
G_total_train_loss.append(G_train_loss / n_sample)
FM_total_train_loss.append(FM_train_loss / n_sample)
detector_total_train_loss.append(detector_train_loss / n_sample)
if dev_dataset:
logger.info(
'#################### eval result at step {} ####################'
.format(global_step))
eval_result = eval(dev_dataset)
valid_detection_loss.append(eval_result['detection_loss'])
valid_oos_ind_precision.append(
eval_result['oos_ind_precision'])
valid_oos_ind_recall.append(eval_result['oos_ind_recall'])
valid_oos_ind_f_score.append(eval_result['oos_ind_f_score'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(-eval_result['eer'])
if signal == -1:
break
elif signal == 0:
pass
elif signal == 1:
save_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
save_model(E,
path=config['bert_save_path'],
model_name='bert')
logger.info(eval_result)
logger.info('valid_eer: {}'.format(eval_result['eer']))
logger.info('valid_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('valid_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('valid_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('valid_auc: {}'.format(eval_result['auc']))
logger.info('valid_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
if args.patience >= args.n_epoch:
save_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
save_model(E, path=config['bert_save_path'], model_name='bert')
freeze_data['D_total_fake_loss'] = D_total_fake_loss
freeze_data['D_total_real_loss'] = D_total_real_loss
freeze_data['D_total_class_loss'] = D_total_class_loss
freeze_data['G_total_train_loss'] = G_total_train_loss
freeze_data['FM_total_train_loss'] = FM_total_train_loss
freeze_data['valid_real_loss'] = valid_detection_loss
freeze_data['valid_oos_ind_precision'] = valid_oos_ind_precision
freeze_data['valid_oos_ind_recall'] = valid_oos_ind_recall
freeze_data['valid_oos_ind_f_score'] = valid_oos_ind_f_score
best_dev = -early_stopping.best_score
if args.do_vis:
all_features = torch.cat(all_features, 0).cpu().numpy()
result['all_features'] = all_features
return result
def main(args):
logger.info('Checking...')
SEED = args.seed
logger.info('seed: {}'.format(SEED))
logger.info('model: {}'.format(args.model))
check_manual_seed(SEED)
check_args(args)
logger.info('Loading config...')
bert_config = Config('config/bert.ini')
bert_config = bert_config(args.bert_type)
# for oos-eval dataset
data_config = Config('config/data.ini')
data_config = data_config(args.dataset)
# Prepare data processor
data_path = os.path.join(data_config['DataDir'],
data_config[args.data_file]) # 把目录和文件名合成一个路径
label_path = data_path.replace('.json', '.label')
if args.dataset == 'oos-eval':
processor = OOSProcessor(bert_config, maxlen=32)
elif args.dataset == 'smp':
processor = SMPProcessor(bert_config, maxlen=32)
else:
raise ValueError('The dataset {} is not supported.'.format(
args.dataset))
processor.load_label(
label_path) # Adding label_to_id and id_to_label ot processor.
n_class = len(processor.id_to_label)
config = vars(args) # 返回参数字典
config['gan_save_path'] = os.path.join(args.output_dir, 'save', 'gan.pt')
config['bert_save_path'] = os.path.join(args.output_dir, 'save', 'bert.pt')
config['n_class'] = n_class
logger.info('config:')
logger.info(config)
model = import_module('model.' + args.model)
model_d = import_module('model.' + 'detector')
D = model.Discriminator(config)
G = model.Generator(config)
E = BertModel.from_pretrained(
bert_config['PreTrainModelDir']) # Bert encoder
if args.loss == 'v1':
detector = model_d.Detector(config)
else:
detector = model_d.Detector_v2(config)
logger.info('Discriminator: {}'.format(D))
logger.info('Generator: {}'.format(G))
logger.info('Detector: {}'.format(detector))
if args.fine_tune:
for param in E.parameters():
param.requires_grad = True
else:
for param in E.parameters():
param.requires_grad = False
D.to(device)
G.to(device)
E.to(device)
detector.to(device)
global_step = 0
def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset,
batch_size=args.train_batch_size,
shuffle=True,
num_workers=2)
global best_dev
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
adversarial_loss = torch.nn.BCELoss().to(device)
adversarial_loss_v2 = torch.nn.CrossEntropyLoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss().to(device)
# Optimizers
optimizer_G = torch.optim.Adam(G.parameters(),
lr=args.G_lr) # optimizer for generator
optimizer_D = torch.optim.Adam(
D.parameters(), lr=args.D_lr) # optimizer for discriminator
optimizer_E = AdamW(E.parameters(), args.bert_lr)
optimizer_detector = torch.optim.Adam(detector.parameters(),
lr=args.detector_lr)
G_total_train_loss = []
D_total_fake_loss = []
D_total_real_loss = []
FM_total_train_loss = []
D_total_class_loss = []
valid_detection_loss = []
valid_oos_ind_precision = []
valid_oos_ind_recall = []
valid_oos_ind_f_score = []
detector_total_train_loss = []
all_features = []
result = dict()
for i in range(args.n_epoch):
# Initialize model state
G.train()
D.train()
E.train()
detector.train()
G_train_loss = 0
D_fake_loss = 0
D_real_loss = 0
FM_train_loss = 0
D_class_loss = 0
detector_train_loss = 0
for sample in tqdm.tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
ood_sample = (y == 0.0)
# weight = torch.ones(len(ood_sample)).to(device) - ood_sample * args.beta
# real_loss_func = torch.nn.BCELoss(weight=weight).to(device)
# the label used to train generator and discriminator.
valid_label = FloatTensor(batch, 1).fill_(1.0).detach()
fake_label = FloatTensor(batch, 1).fill_(0.0).detach()
optimizer_E.zero_grad()
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
# train D on real
optimizer_D.zero_grad()
real_f_vector, discriminator_output, classification_output = D(
real_feature, return_feature=True)
# discriminator_output = discriminator_output.squeeze()
real_loss = adversarial_loss(discriminator_output, valid_label)
real_loss.backward(retain_graph=True)
if args.do_vis:
all_features.append(real_f_vector.detach())
# # train D on fake
if args.model == 'lstm_gan' or args.model == 'cnn_gan':
z = FloatTensor(
np.random.normal(0, 1,
(batch, 32, args.G_z_dim))).to(device)
else:
z = FloatTensor(
np.random.normal(0, 1,
(batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
fake_discriminator_output = D.detect_only(fake_feature)
fake_loss = adversarial_loss(fake_discriminator_output,
fake_label)
fake_loss.backward()
optimizer_D.step()
# if args.fine_tune:
# optimizer_E.step()
# train G
optimizer_G.zero_grad()
if args.model == 'lstm_gan' or args.model == 'cnn_gan':
z = FloatTensor(
np.random.normal(0, 1,
(batch, 32, args.G_z_dim))).to(device)
else:
z = FloatTensor(
np.random.normal(0, 1,
(batch, args.G_z_dim))).to(device)
fake_f_vector, D_decision = D.detect_only(G(z),
return_feature=True)
gd_loss = adversarial_loss(D_decision, valid_label)
fm_loss = torch.abs(
torch.mean(real_f_vector.detach(), 0) -
torch.mean(fake_f_vector, 0)).mean()
g_loss = gd_loss + 0 * fm_loss
g_loss.backward()
optimizer_G.step()
optimizer_E.zero_grad()
# train detector
optimizer_detector.zero_grad()
if args.model == 'lstm_gan' or args.model == 'cnn_gan':
z = FloatTensor(
np.random.normal(0, 1,
(batch, 32, args.G_z_dim))).to(device)
else:
z = FloatTensor(
np.random.normal(0, 1,
(batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
if args.loss == 'v1':
loss_fake = adversarial_loss(
detector(fake_feature),
fake_label) # fake sample is ood
else:
loss_fake = adversarial_loss_v2(
detector(fake_feature),
fake_label.long().squeeze())
if args.loss == 'v1':
loss_real = adversarial_loss(detector(real_feature),
y.float())
else:
loss_real = adversarial_loss_v2(detector(real_feature),
y.long())
if args.detect_loss == 'v1':
detector_loss = args.beta * loss_fake + (
1 - args.beta) * loss_real
else:
detector_loss = args.beta * loss_fake + loss_real
detector_loss = args.sigma * detector_loss
detector_loss.backward()
optimizer_detector.step()
if args.fine_tune:
optimizer_E.step()
global_step += 1
D_fake_loss += fake_loss.detach()
D_real_loss += real_loss.detach()
G_train_loss += g_loss.detach() + fm_loss.detach()
FM_train_loss += fm_loss.detach()
detector_train_loss += detector_loss
logger.info('[Epoch {}] Train: D_fake_loss: {}'.format(
i, D_fake_loss / n_sample))
logger.info('[Epoch {}] Train: D_real_loss: {}'.format(
i, D_real_loss / n_sample))
logger.info('[Epoch {}] Train: D_class_loss: {}'.format(
i, D_class_loss / n_sample))
logger.info('[Epoch {}] Train: G_train_loss: {}'.format(
i, G_train_loss / n_sample))
logger.info('[Epoch {}] Train: FM_train_loss: {}'.format(
i, FM_train_loss / n_sample))
logger.info('[Epoch {}] Train: detector_train_loss: {}'.format(
i, detector_train_loss / n_sample))
logger.info(
'---------------------------------------------------------------------------'
)
D_total_fake_loss.append(D_fake_loss / n_sample)
D_total_real_loss.append(D_real_loss / n_sample)
D_total_class_loss.append(D_class_loss / n_sample)
G_total_train_loss.append(G_train_loss / n_sample)
FM_total_train_loss.append(FM_train_loss / n_sample)
detector_total_train_loss.append(detector_train_loss / n_sample)
if dev_dataset:
logger.info(
'#################### eval result at step {} ####################'
.format(global_step))
eval_result = eval(dev_dataset)
valid_detection_loss.append(eval_result['detection_loss'])
valid_oos_ind_precision.append(
eval_result['oos_ind_precision'])
valid_oos_ind_recall.append(eval_result['oos_ind_recall'])
valid_oos_ind_f_score.append(eval_result['oos_ind_f_score'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(-eval_result['eer'])
if signal == -1:
break
elif signal == 0:
pass
elif signal == 1:
save_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
save_model(E,
path=config['bert_save_path'],
model_name='bert')
logger.info(eval_result)
logger.info('valid_eer: {}'.format(eval_result['eer']))
logger.info('valid_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('valid_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('valid_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('valid_auc: {}'.format(eval_result['auc']))
logger.info('valid_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
if args.patience >= args.n_epoch:
save_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
save_model(E, path=config['bert_save_path'], model_name='bert')
freeze_data['D_total_fake_loss'] = D_total_fake_loss
freeze_data['D_total_real_loss'] = D_total_real_loss
freeze_data['D_total_class_loss'] = D_total_class_loss
freeze_data['G_total_train_loss'] = G_total_train_loss
freeze_data['FM_total_train_loss'] = FM_total_train_loss
freeze_data['valid_real_loss'] = valid_detection_loss
freeze_data['valid_oos_ind_precision'] = valid_oos_ind_precision
freeze_data['valid_oos_ind_recall'] = valid_oos_ind_recall
freeze_data['valid_oos_ind_f_score'] = valid_oos_ind_f_score
best_dev = -early_stopping.best_score
if args.do_vis:
all_features = torch.cat(all_features, 0).cpu().numpy()
result['all_features'] = all_features
return result
def eval(dataset):
dev_dataloader = DataLoader(dataset,
batch_size=args.predict_batch_size,
shuffle=False,
num_workers=2)
n_sample = len(dev_dataloader)
result = dict()
# Loss function
detection_loss = torch.nn.BCELoss().to(device)
detection_loss_v2 = torch.nn.CrossEntropyLoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss(ignore_index=0).to(device)
# G.eval()
# D.eval()
E.eval()
detector.eval()
all_detection_preds = []
all_class_preds = []
all_logit = []
for sample in tqdm.tqdm(dev_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
# -------------------------evaluate D------------------------- #
# BERT encode sentence to feature vector
with torch.no_grad():
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
# 大于2表示除了训练判别器还要训练分类器
if n_class > 2:
# f_vector, discriminator_output, classification_output = D(real_feature, return_feature=True)
# all_detection_preds.append(discriminator_output)
# all_class_preds.append(classification_output)
pass
# 只预测判别器
else:
# f_vector, discriminator_output = D.detect_only(real_feature, return_feature=True)
# all_detection_preds.append(discriminator_output)
# f_vector = D.get_vector(real_feature)
if args.loss == 'v1':
detector_out = detector(real_feature)
all_detection_preds.append(detector_out)
else:
detector_out = detector(real_feature)
all_logit.append(detector_out)
all_detection_preds.append(
torch.argmax(detector_out, 1))
all_y = LongTensor(
dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds,
0).cpu() # [length, 1]
if args.loss == 'v1':
all_detection_binary_preds = convert_to_int_by_threshold(
all_detection_preds.squeeze()) # [length, 1]
else:
all_detection_binary_preds = all_detection_preds
all_logit = torch.cat(all_logit, 0).cpu()
# 计算损失
if args.loss == 'v1':
loss = detection_loss(all_detection_preds, all_binary_y.float())
else:
loss = detection_loss_v2(all_logit, all_y.long())
result['detection_loss'] = loss
if n_class > 2:
class_one_hot_preds = torch.cat(all_class_preds,
0).detach().cpu() # one hot label
class_loss = classified_loss(class_one_hot_preds,
all_y) # compute loss
all_class_preds = torch.argmax(class_one_hot_preds, 1) # label
class_acc = metrics.ind_class_accuracy(
all_class_preds, all_y, oos_index=0) # accuracy for ind class
logger.info(
metrics.classification_report(
all_y, all_class_preds,
target_names=processor.id_to_label))
logger.info(
metrics.classification_report(all_binary_y,
all_detection_binary_preds,
target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(
all_detection_binary_preds, all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds,
all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
if n_class > 2:
result['class_loss'] = class_loss
result['class_acc'] = class_acc
freeze_data['valid_all_y'] = all_y
freeze_data['vaild_all_pred'] = all_detection_binary_preds
freeze_data['valid_score'] = y_score
return result
def test(dataset):
# load BERT and GAN
load_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
load_model(E, path=config['bert_save_path'], model_name='bert')
test_dataloader = DataLoader(dataset,
batch_size=args.predict_batch_size,
shuffle=False,
num_workers=2)
n_sample = len(test_dataloader)
result = dict()
# Loss function
detection_loss = torch.nn.BCELoss().to(device)
detection_loss_v2 = torch.nn.CrossEntropyLoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss(ignore_index=0).to(device)
G.eval()
D.eval()
E.eval()
detector.eval()
all_detection_preds = []
all_class_preds = []
all_features = []
all_logit = []
for sample in tqdm.tqdm(test_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
# -------------------------evaluate D------------------------- #
# BERT encode sentence to feature vector
with torch.no_grad():
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
# 大于2表示除了训练判别器还要训练分类器
if n_class > 2:
# f_vector, discriminator_output, classification_output = D(real_feature, return_feature=True)
# all_detection_preds.append(discriminator_output)
# all_class_preds.append(classification_output)
pass
else:
if args.loss == 'v1':
detector_out = detector(real_feature)
all_detection_preds.append(detector_out)
else:
detector_out = detector(real_feature)
all_logit.append(detector_out)
all_detection_preds.append(
torch.argmax(detector_out, 1))
# if args.do_vis:
# all_features.append(f_vector)
all_y = LongTensor(
dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds,
0).cpu() # [length, 1]
if args.loss == 'v1':
all_detection_binary_preds = convert_to_int_by_threshold(
all_detection_preds.squeeze()) # [length, 1]
else:
all_detection_binary_preds = all_detection_preds
all_logit = torch.cat(all_logit, 0).cpu()
# 计算损失
if args.loss == 'v1':
loss = detection_loss(all_detection_preds, all_binary_y.float())
else:
loss = detection_loss_v2(all_logit, all_y.long())
result['detection_loss'] = loss
if n_class > 2:
class_one_hot_preds = torch.cat(all_class_preds,
0).detach().cpu() # one hot label
class_loss = classified_loss(class_one_hot_preds,
all_y) # compute loss
all_class_preds = torch.argmax(class_one_hot_preds, 1) # label
class_acc = metrics.ind_class_accuracy(
all_class_preds, all_y, oos_index=0) # accuracy for ind class
logger.info(
metrics.classification_report(
all_y, all_class_preds,
target_names=processor.id_to_label))
logger.info(
metrics.classification_report(all_binary_y,
all_detection_binary_preds,
target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(
all_detection_binary_preds, all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds,
all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['all_y'] = all_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['score'] = y_score
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
if n_class > 2:
result['class_loss'] = class_loss
result['class_acc'] = class_acc
if args.do_vis:
all_features = torch.cat(all_features, 0).cpu().numpy()
result['all_features'] = all_features
freeze_data['test_all_y'] = all_y.tolist()
freeze_data['test_all_pred'] = all_detection_binary_preds.tolist()
freeze_data['test_score'] = y_score
return result
def get_fake_feature(num_output):
"""
生成一定数量的假特征
"""
G.eval()
fake_features = []
start = 0
batch = args.predict_batch_size
with torch.no_grad():
while start < num_output:
end = min(num_output, start + batch)
if args.model == 'lstm_gan' or args.model == 'cnn_gan':
z = FloatTensor(
np.random.normal(0,
1,
size=(end - start, 32, args.G_z_dim)))
else:
z = FloatTensor(
np.random.normal(0,
1,
size=(end - start, args.G_z_dim)))
fake_feature = G(z)
f_vector, _ = D.detect_only(fake_feature, return_feature=True)
fake_features.append(f_vector)
start += batch
return torch.cat(fake_features, 0).cpu().numpy()
if args.do_train:
if config['data_file'].startswith('binary'):
text_train_set = processor.read_dataset(data_path, ['train'])
text_dev_set = processor.read_dataset(data_path, ['val'])
elif config['dataset'] == 'oos-eval':
text_train_set = processor.read_dataset(data_path,
['train', 'oos_train'])
text_dev_set = processor.read_dataset(data_path,
['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_train_set = processor.read_dataset(data_path, ['train'])
text_dev_set = processor.read_dataset(data_path, ['val'])
train_features = processor.convert_to_ids(text_train_set)
train_dataset = OOSDataset(train_features)
dev_features = processor.convert_to_ids(text_dev_set)
dev_dataset = OOSDataset(dev_features)
train_result = train(train_dataset, dev_dataset)
# save_feature(train_result['all_features'], os.path.join(args.output_dir, 'train_feature'))
if args.do_eval:
logger.info(
'#################### eval result at step {} ####################'.
format(global_step))
if config['data_file'].startswith('binary'):
text_dev_set = processor.read_dataset(data_path, ['val'])
elif config['dataset'] == 'oos-eval':
text_dev_set = processor.read_dataset(data_path,
['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_dev_set = processor.read_dataset(data_path, ['val'])
dev_features = processor.convert_to_ids(text_dev_set)
dev_dataset = OOSDataset(dev_features)
eval_result = eval(dev_dataset)
logger.info(eval_result)
logger.info('eval_eer: {}'.format(eval_result['eer']))
logger.info('eval_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('eval_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('eval_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('eval_auc: {}'.format(eval_result['auc']))
logger.info('eval_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
if args.do_test:
logger.info(
'#################### test result at step {} ####################'.
format(global_step))
if config['data_file'].startswith('binary'):
text_test_set = processor.read_dataset(data_path, ['test'])
elif config['dataset'] == 'oos-eval':
text_test_set = processor.read_dataset(data_path,
['test', 'oos_test'])
elif config['dataset'] == 'smp':
text_test_set = processor.read_dataset(data_path, ['test'])
test_features = processor.convert_to_ids(text_test_set)
test_dataset = OOSDataset(test_features)
test_result = test(test_dataset)
logger.info(test_result)
logger.info('test_eer: {}'.format(test_result['eer']))
logger.info('test_ood_ind_precision: {}'.format(
test_result['oos_ind_precision']))
logger.info('test_ood_ind_recall: {}'.format(
test_result['oos_ind_recall']))
logger.info('test_ood_ind_f_score: {}'.format(
test_result['oos_ind_f_score']))
logger.info('test_auc: {}'.format(test_result['auc']))
logger.info('test_fpr95: {}'.format(
ErrorRateAt95Recall(test_result['all_binary_y'],
test_result['y_score'])))
my_plot_roc(test_result['all_binary_y'], test_result['y_score'],
os.path.join(args.output_dir, 'roc_curve.png'))
save_result(test_result, os.path.join(args.output_dir, 'test_result'))
# save_feature(test_result['all_features'], os.path.join(args.output_dir, 'test_feature'))
# 输出错误cases
if config['dataset'] == 'oos-eval':
texts = [line[0] for line in text_test_set]
elif config['dataset'] == 'smp':
texts = [line['text'] for line in text_test_set]
else:
raise ValueError('The dataset {} is not supported.'.format(
args.dataset))
output_cases(texts, test_result['all_binary_y'],
test_result['all_detection_binary_preds'],
os.path.join(args.output_dir,
'test_cases.csv'), processor)
# confusion matrix
plot_confusion_matrix(test_result['all_binary_y'],
test_result['all_detection_binary_preds'],
args.output_dir)
if args.do_vis:
# [2 * length, feature_fim]
features = np.concatenate([
test_result['all_features'],
get_fake_feature(len(test_dataset) // 2)
],
axis=0)
features = TSNE(n_components=2, verbose=1,
n_jobs=-1).fit_transform(
features) # [2 * length, 2]
# [2 * length, １]
if n_class > 2:
labels = np.concatenate([
test_result['all_y'],
np.array([-1] * (len(test_dataset) // 2))
], 0).reshape((-1, 1))
else:
labels = np.concatenate([
test_result['all_binary_y'],
np.array([-1] * (len(test_dataset) // 2))
], 0).reshape((-1, 1))
# [2 * length, 3]
data = np.concatenate([features, labels], 1)
fig = scatter_plot(data, processor)
fig.savefig(os.path.join(args.output_dir, 'plot.png'))
fig.show()
freeze_data['feature_label'] = data
# plot_train_test(train_result['all_features'], test_result['all_features'], args.output_dir)
with open(os.path.join(config['output_dir'], 'freeze_data.pkl'),
'wb') as f:
pickle.dump(freeze_data, f)
df = pd.DataFrame(
data={
'valid_y': freeze_data['valid_all_y'],
'valid_score': freeze_data['valid_score'],
})
df.to_csv(os.path.join(config['output_dir'], 'valid_score.csv'))
df = pd.DataFrame(
data={
'test_y': freeze_data['test_all_y'],
'test_score': freeze_data['test_score']
})
df.to_csv(os.path.join(config['output_dir'], 'test_score.csv'))
def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset,
batch_size=args.train_batch_size //
args.gradient_accumulation_steps,
shuffle=True,
num_workers=2)
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
classified_loss = torch.nn.CrossEntropyLoss().to(device)
adversarial_loss = torch.nn.BCELoss().to(device)
# Optimizers
optimizer = AdamW(model.parameters(), args.lr)
train_loss = []
if dev_dataset:
valid_loss = []
valid_ind_class_acc = []
iteration = 0
for i in range(args.n_epoch):
model.train()
total_loss = 0
for sample in tqdm.tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
f_vector, discriminator_output, classification_output = model(
token, mask, type_ids, return_feature=True)
discriminator_output = discriminator_output.squeeze()
if args.BCE:
loss = adversarial_loss(discriminator_output,
(y != 0.0).float())
else:
loss = classified_loss(discriminator_output, y.long())
total_loss += loss.item()
loss = loss / args.gradient_accumulation_steps
loss.backward()
# bp and update parameters
if (global_step + 1) % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
global_step += 1
logger.info('[Epoch {}] Train: train_loss: {}'.format(
i, total_loss / n_sample))
logger.info('-' * 30)
train_loss.append(total_loss / n_sample)
iteration += 1
if dev_dataset:
logger.info(
'#################### eval result at step {} ####################'
.format(global_step))
eval_result = eval(dev_dataset)
valid_loss.append(eval_result['loss'])
valid_ind_class_acc.append(eval_result['ind_class_acc'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(-eval_result['eer'])
if signal == -1:
break
elif signal == 0:
pass
elif signal == 1:
save_model(model,
path=config['model_save_path'],
model_name='bert')
logger.info(eval_result)
logger.info('valid_eer: {}'.format(eval_result['eer']))
logger.info('valid_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('valid_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('valid_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('valid_auc: {}'.format(eval_result['auc']))
logger.info('valid_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
from utils.visualization import draw_curve
draw_curve(train_loss, iteration, 'train_loss', args.output_dir)
if dev_dataset:
draw_curve(valid_loss, iteration, 'valid_loss', args.output_dir)
draw_curve(valid_ind_class_acc, iteration,
'valid_ind_class_accuracy', args.output_dir)
if args.patience >= args.n_epoch:
save_model(model,
path=config['model_save_path'],
model_name='bert')
freeze_data['train_loss'] = train_loss
freeze_data['valid_loss'] = valid_loss
def main(args):
logger.info('Checking...')
SEED = args.seed
check_manual_seed(SEED)
check_args(args)
logger.info('seed: {}'.format(args.seed))
gross_result['seed'] = args.seed
logger.info('Loading config...')
bert_config = BertConfig('config/bert.ini')
bert_config = bert_config(args.bert_type)
# for oos-eval dataset
data_config = Config('config/data.ini')
data_config = data_config(args.dataset)
# Prepare data processor
data_path = os.path.join(data_config['DataDir'],
data_config[args.data_file]) # 把目录和文件名合成一个路径
label_path = data_path.replace('.json', '.label')
if args.dataset == 'oos-eval':
processor = OOSProcessor(bert_config, maxlen=32)
elif args.dataset == 'smp':
processor = SMPProcessor(bert_config, maxlen=32)
else:
raise ValueError('The dataset {} is not supported.'.format(
args.dataset))
processor.load_label(
label_path) # Adding label_to_id and id_to_label ot processor.
n_class = len(processor.id_to_label)
config = vars(args) # 返回参数字典
config['model_save_path'] = os.path.join(args.output_dir, 'save',
'bert.pt')
config['n_class'] = n_class
logger.info('config:')
logger.info(config)
model = TextCNN(bert_config, n_class) # Bert encoder
if args.fine_tune:
model.unfreeze_bert_encoder()
else:
model.freeze_bert_encoder()
model.to(device)
global_step = 0
def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset,
batch_size=args.train_batch_size //
args.gradient_accumulation_steps,
shuffle=True,
num_workers=2)
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
classified_loss = torch.nn.CrossEntropyLoss().to(device)
# Optimizers
optimizer = AdamW(model.parameters(), args.lr)
train_loss = []
if dev_dataset:
valid_loss = []
valid_ind_class_acc = []
iteration = 0
for i in range(args.n_epoch):
model.train()
total_loss = 0
for sample in tqdm.tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
logits = model(token, mask, type_ids)
loss = classified_loss(logits, y.long())
total_loss += loss.item()
loss = loss / args.gradient_accumulation_steps
loss.backward()
# bp and update parameters
if (global_step + 1) % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
global_step += 1
logger.info('[Epoch {}] Train: train_loss: {}'.format(
i, total_loss / n_sample))
logger.info('-' * 30)
train_loss.append(total_loss / n_sample)
iteration += 1
if dev_dataset:
logger.info(
'#################### eval result at step {} ####################'
.format(global_step))
eval_result = eval(dev_dataset)
valid_loss.append(eval_result['loss'])
valid_ind_class_acc.append(eval_result['ind_class_acc'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(eval_result['accuracy'])
if signal == -1:
break
elif signal == 0:
pass
elif signal == 1:
save_model(model,
path=config['model_save_path'],
model_name='bert')
# logger.info(eval_result)
from utils.visualization import draw_curve
draw_curve(train_loss, iteration, 'train_loss', args.output_dir)
if dev_dataset:
draw_curve(valid_loss, iteration, 'valid_loss', args.output_dir)
draw_curve(valid_ind_class_acc, iteration,
'valid_ind_class_accuracy', args.output_dir)
if args.patience >= args.n_epoch:
save_model(model,
path=config['model_save_path'],
model_name='bert')
freeze_data['train_loss'] = train_loss
freeze_data['valid_loss'] = valid_loss
def eval(dataset):
dev_dataloader = DataLoader(dataset,
batch_size=args.predict_batch_size,
shuffle=False,
num_workers=2)
n_sample = len(dev_dataloader)
result = dict()
model.eval()
# Loss function
classified_loss = torch.nn.CrossEntropyLoss().to(device)
all_pred = []
all_logit = []
total_loss = 0
for sample in tqdm.tqdm(dev_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
with torch.no_grad():
logit = model(token, mask, type_ids)
all_logit.append(logit)
all_pred.append(torch.argmax(logit, 1))
total_loss += classified_loss(logit, y.long())
all_y = LongTensor(
dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_pred = torch.cat(all_pred, 0).cpu()
all_logit = torch.cat(all_logit, 0).cpu()
ind_class_acc = metrics.ind_class_accuracy(all_pred, all_y)
report = metrics.classification_report(all_y,
all_pred,
output_dict=True)
result.update(report)
y_score = all_logit.softmax(1)[:, 1].tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(
all_pred, all_binary_y)
result['eer'] = eer
result['ind_class_acc'] = ind_class_acc
result['loss'] = total_loss / n_sample
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['auc'] = roc_auc_score(all_binary_y, y_score)
result['y_score'] = y_score
result['all_binary_y'] = all_binary_y
freeze_data['valid_all_y'] = all_y
freeze_data['vaild_all_pred'] = all_pred
freeze_data['valid_score'] = y_score
return result
def test(dataset):
load_model(model, path=config['model_save_path'], model_name='bert')
test_dataloader = DataLoader(dataset,
batch_size=args.predict_batch_size,
shuffle=False,
num_workers=2)
n_sample = len(test_dataloader)
result = dict()
model.eval()
# Loss function
classified_loss = torch.nn.CrossEntropyLoss().to(device)
all_pred = []
total_loss = 0
all_logit = []
for sample in tqdm.tqdm(test_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
with torch.no_grad():
logit = model(token, mask, type_ids)
all_logit.append(logit)
all_pred.append(torch.argmax(logit, 1))
total_loss += classified_loss(logit, y.long())
all_y = LongTensor(
dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_pred = torch.cat(all_pred, 0).cpu()
all_logit = torch.cat(all_logit, 0).cpu()
# classification report
ind_class_acc = metrics.ind_class_accuracy(all_pred, all_y)
report = metrics.classification_report(all_y,
all_pred,
output_dict=True)
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(
all_pred, all_binary_y)
result.update(report)
# 只有二分类时候ERR才有意义
y_score = all_logit.softmax(1)[:, 1].tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
result['eer'] = eer
result['ind_class_acc'] = ind_class_acc
result['loss'] = total_loss / n_sample
result['all_y'] = all_y.tolist()
result['all_pred'] = all_pred.tolist()
result['all_binary_y'] = all_binary_y
freeze_data['test_all_y'] = all_y.tolist()
freeze_data['test_all_pred'] = all_pred.tolist()
freeze_data['test_score'] = y_score
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['auc'] = roc_auc_score(all_binary_y, y_score)
result['y_score'] = y_score
return result
if args.do_train:
if config['data_file'].startswith('binary'):
text_train_set = processor.read_dataset(data_path, ['train'])
text_dev_set = processor.read_dataset(data_path, ['val'])
elif config['dataset'] == 'oos-eval':
text_train_set = processor.read_dataset(data_path,
['train', 'oos_train'])
text_dev_set = processor.read_dataset(data_path,
['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_train_set = processor.read_dataset(data_path, ['train'])
text_dev_set = processor.read_dataset(data_path, ['val'])
train_features = processor.convert_to_ids(text_train_set)
train_dataset = OOSDataset(train_features)
dev_features = processor.convert_to_ids(text_dev_set)
dev_dataset = OOSDataset(dev_features)
train(train_dataset, dev_dataset)
if args.do_eval:
logger.info(
'#################### eval result at step {} ####################'.
format(global_step))
if config['data_file'].startswith('binary'):
text_dev_set = processor.read_dataset(data_path, ['val'])
elif config['dataset'] == 'oos-eval':
text_dev_set = processor.read_dataset(data_path,
['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_dev_set = processor.read_dataset(data_path, ['val'])
dev_features = processor.convert_to_ids(text_dev_set)
dev_dataset = OOSDataset(dev_features)
eval_result = eval(dev_dataset)
# logger.info(eval_result)
logger.info('eval_eer: {}'.format(eval_result['eer']))
logger.info('eval_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('eval_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('eval_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('eval_auc: {}'.format(eval_result['auc']))
logger.info('eval_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
gross_result['eval_eer'] = eval_result['eer']
gross_result['eval_auc'] = eval_result['auc']
gross_result['eval_fpr95'] = ErrorRateAt95Recall(
eval_result['all_binary_y'], eval_result['y_score'])
gross_result['eval_oos_ind_precision'] = eval_result[
'oos_ind_precision']
gross_result['eval_oos_ind_recall'] = eval_result['oos_ind_recall']
gross_result['eval_oos_ind_f_score'] = eval_result['oos_ind_f_score']
if args.do_test:
logger.info(
'#################### test result at step {} ####################'.
format(global_step))
if config['data_file'].startswith('binary'):
text_test_set = processor.read_dataset(data_path, ['test'])
elif config['dataset'] == 'oos-eval':
text_test_set = processor.read_dataset(data_path,
['test', 'oos_test'])
elif config['dataset'] == 'smp':
text_test_set = processor.read_dataset(data_path, ['test'])
test_features = processor.convert_to_ids(text_test_set)
test_dataset = OOSDataset(test_features)
test_result = test(test_dataset)
save_result(test_result, os.path.join(args.output_dir, 'test_result'))
# logger.info(test_result)
logger.info('test_eer: {}'.format(test_result['eer']))
logger.info('test_ood_ind_precision: {}'.format(
test_result['oos_ind_precision']))
logger.info('test_ood_ind_recall: {}'.format(
test_result['oos_ind_recall']))
logger.info('test_ood_ind_f_score: {}'.format(
test_result['oos_ind_f_score']))
logger.info('test_auc: {}'.format(test_result['auc']))
logger.info('test_fpr95: {}'.format(
ErrorRateAt95Recall(test_result['all_binary_y'],
test_result['y_score'])))
my_plot_roc(test_result['all_binary_y'], test_result['y_score'],
os.path.join(args.output_dir, 'roc_curve.png'))
save_result(test_result, os.path.join(args.output_dir, 'test_result'))
gross_result['test_eer'] = test_result['eer']
gross_result['test_auc'] = test_result['auc']
gross_result['test_fpr95'] = ErrorRateAt95Recall(
test_result['all_binary_y'], test_result['y_score'])
gross_result['test_oos_ind_precision'] = test_result[
'oos_ind_precision']
gross_result['test_oos_ind_recall'] = test_result['oos_ind_recall']
gross_result['test_oos_ind_f_score'] = test_result['oos_ind_f_score']
# 输出错误cases
if config['dataset'] == 'oos-eval':
texts = [line[0] for line in text_test_set]
elif config['dataset'] == 'smp':
texts = [line['text'] for line in text_test_set]
else:
raise ValueError('The dataset {} is not supported.'.format(
args.dataset))
output_cases(texts, test_result['all_y'], test_result['all_pred'],
os.path.join(args.output_dir, 'test_cases.csv'),
processor)
# confusion matrix
plot_confusion_matrix(test_result['all_y'], test_result['all_pred'],
args.output_dir)
with open(os.path.join(config['output_dir'], 'freeze_data.pkl'),
'wb') as f:
pickle.dump(freeze_data, f)
df = pd.DataFrame(
data={
'valid_y': freeze_data['valid_all_y'],
'valid_score': freeze_data['valid_score'],
})
df.to_csv(os.path.join(config['output_dir'], 'valid_score.csv'))
df = pd.DataFrame(
data={
'test_y': freeze_data['test_all_y'],
'test_score': freeze_data['test_score']
})
df.to_csv(os.path.join(config['output_dir'], 'test_score.csv'))
if args.result != 'no':
pd_result = pd.DataFrame(gross_result)
if args.seed == 16:
pd_result.to_csv(args.result + '_gross_result.csv', index=False)
else:
pd_result.to_csv(args.result + '_gross_result.csv',
index=False,
mode='a',
header=False)
if args.seed == 8192:
print(args.result)
std_mean(args.result + '_gross_result.csv')
def main(args):
logger.info('Checking...')
print('torch.cuda.is_available:', torch.cuda.is_available())
# print('torch.cuda.current_device:', torch.cuda.current_device())
logger.info('device: {}'.format(device))
logger.info('ood: {}'.format(args.ood))
SEED = args.seed
gross_result['seed'] = args.seed
logger.info('seed: {}'.format(SEED))
logger.info('model: {}'.format(args.model))
check_manual_seed(SEED)
check_args(args)
if 0 <= args.beta <= 1:
logger.info('beta: {}'.format(args.beta))
logger.info('mode: {}'.format(args.mode))
logger.info('maxlen: {}'.format(args.maxlen))
logger.info('minlen: {}'.format(args.minlen))
logger.info('optim_mode: {}'.format(args.optim_mode))
logger.info('length_weight: {}'.format(args.length_weight))
logger.info('sample_weight: {}'.format(args.sample_weight))
logger.info('Loading config...')
bert_config = Config('config/bert.ini')
bert_config = bert_config(args.bert_type)
# for oos-eval dataset
data_config = Config('config/data.ini')
data_config = data_config(args.dataset)
# Prepare data processor
data_path = os.path.join(data_config['DataDir'], data_config[args.data_file]) # 把目录和文件名合成一个路径
label_path = data_path.replace('.json', '.label')
# with open(data_path, 'r', encoding='utf-8') as fp:
# source = json.load(fp)
# for type in source:
# n = 0
# n_id = 0
# n_ood = 0
# text_len = {}
# for line in source[type]:
# if line['domain'] == 'chat':
# n_ood += 1
# else:
# n_id += 1
# n += 1
# text_len[len(line['text'])] = text_len.get(len(line['text']), 0) + 1
# print(type, n)
# print('ood', n_ood)
# print('id', n_id)
# print(sorted(text_len.items(), key=lambda d: d[0], reverse=False))
if args.dataset == 'oos-eval':
processor = OOSProcessor(bert_config, maxlen=32)
elif args.dataset == 'smp':
if args.mode == -1:
processor = SMPProcessor(bert_config, maxlen=32)
print('processor')
else:
processor = SMPProcessor_v3(bert_config, maxlen=32)
print('processor_v3')
else:
raise ValueError('The dataset {} is not supported.'.format(args.dataset))
processor.load_label(label_path) # Adding label_to_id and id_to_label ot processor.
n_class = len(processor.id_to_label)
print('label: ', processor.id_to_label)
config = vars(args) # 返回参数字典
config['gan_save_path'] = os.path.join(args.output_dir, 'save', 'gan.pt')
config['bert_save_path'] = os.path.join(args.output_dir, 'save', 'bert.pt')
config['n_class'] = n_class
logger.info('config:')
logger.info(config)
model = import_module('model.' + args.model)
D = model.Discriminator(config)
G = model.Generator(config)
E = BertModel.from_pretrained(bert_config['PreTrainModelDir']) # Bert encoder
# logger.info('Discriminator: {}'.format(D))
# logger.info('Generator: {}'.format(G))
if args.fine_tune:
for param in E.parameters():
param.requires_grad = True
else:
for param in E.parameters():
param.requires_grad = False
D.to(device)
G.to(device)
E.to(device)
global_step = 0
def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset, batch_size=args.train_batch_size, shuffle=True, num_workers=2)
global best_dev
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
adversarial_loss = torch.nn.BCELoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss().to(device)
# Optimizers
optimizer_G = torch.optim.Adam(G.parameters(), lr=args.G_lr) # optimizer for generator
optimizer_D = torch.optim.Adam(D.parameters(), lr=args.D_lr) # optimizer for discriminator
optimizer_E = AdamW(E.parameters(), args.bert_lr)
G_total_train_loss = []
D_total_fake_loss = []
D_total_real_loss = []
FM_total_train_loss = []
D_total_class_loss = []
valid_detection_loss = []
valid_oos_ind_precision = []
valid_oos_ind_recall = []
valid_oos_ind_f_score = []
all_features = []
result = dict()
for i in range(args.n_epoch):
# Initialize model state
G.train()
D.train()
E.train()
G_train_loss = 0
G_d_loss = 0
D_fake_loss = 0
D_real_loss = 0
FM_train_loss = 0
D_class_loss = 0
G_features = []
for sample in tqdm.tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
if args.dataset == 'smp':
token, mask, type_ids, knowledge_tag, y = sample
batch = len(token)
ood_sample = (y == 0.0).float()
# weight = torch.ones(len(ood_sample)).to(device) - ood_sample * args.beta
# real_loss_func = torch.nn.BCELoss(weight=weight).to(device)
# length weight
length_sample = FloatTensor([0] * batch)
if args.minlen != -1:
short_sample = (mask[:, args.minlen] == 0).float()
length_sample = length_sample.add(short_sample)
if args.maxlen != -1:
long_sample = mask[:, args.maxlen].float()
length_sample = length_sample.add(long_sample)
# get knowledge sample weight by knowledge_tag
exclude_sample = knowledge_tag
# initailize weight
weight = torch.ones(batch).to(device)
# optimize without weights
if args.optim_mode == 0 and 0 <= args.beta <= 1:
weight -= ood_sample * args.beta
# only optimize length by weight
if args.optim_mode == 1:
# set all exclude_sample's weight to 0
weight -= exclude_sample
length_sample -= exclude_sample
length_sample = (length_sample > 0).float()
weight -= length_sample * (1 - args.length_weight)
# set ood sample weight
if 0 <= args.beta <= 1:
ood_sample -= exclude_sample
ood_sample = (ood_sample > 0).float()
temp = torch.ones(batch).to(device)
temp -= ood_sample * args.beta
weight *= temp
# only optimize sample by weight
if args.optim_mode == 2:
# set all length_sample's weight to 0
weight -= length_sample
exclude_sample -= length_sample
exclude_sample = (exclude_sample > 0).float()
weight -= exclude_sample * (1 - args.sample_weight)
# set ood sample weight
if 0 <= args.beta <= 1:
ood_sample -= length_sample
ood_sample = (ood_sample > 0).float()
temp = torch.ones(batch)
temp -= ood_sample * args.beta
weight *= temp
# optimize length and sample by weight
# if args.optim_mode == 3:
# alpha = 0.5
# beta = 0.5
# weight = torch.ones(len(length_sample)).to(device) \
# - alpha * length_sample * (1 - args.length_weight) \
# - beta * exclude_sample * (1 - args.sample_weight)
if args.dataset == 'oos-eval':
token, mask, type_ids, y = sample
batch = len(token)
ood_sample = (y == 0.0).float()
# weight = torch.ones(len(ood_sample)).to(device) - ood_sample * args.beta
# real_loss_func = torch.nn.BCELoss(weight=weight).to(device)
# length weight
length_sample = FloatTensor([0] * batch)
if args.minlen != -1:
short_sample = (mask[:, args.minlen] == 0).float()
length_sample = length_sample.add(short_sample)
if args.maxlen != -1:
long_sample = mask[:, args.maxlen].float()
length_sample = length_sample.add(long_sample)
# initailize weight
weight = torch.ones(batch).to(device)
# optimize without weights
if args.optim_mode == 0 and 0 <= args.beta <= 1:
weight -= ood_sample * args.beta
# only optimize length by weight
if args.optim_mode == 1:
weight -= length_sample * (1 - args.length_weight)
# set ood sample weight
if 0 <= args.beta <= 1:
ood_sample -= length_sample
ood_sample = (ood_sample > 0).float()
temp = torch.ones(batch).to(device)
temp -= ood_sample * args.beta
weight *= temp
real_loss_func = torch.nn.BCELoss(weight=weight).to(device)
# the label used to train generator and discriminator.
valid_label = FloatTensor(batch, 1).fill_(1.0).detach()
fake_label = FloatTensor(batch, 1).fill_(0.0).detach()
optimizer_E.zero_grad()
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
# train D on real
optimizer_D.zero_grad()
real_f_vector, discriminator_output, classification_output = D(real_feature, return_feature=True)
discriminator_output = discriminator_output.squeeze()
# real_loss = adversarial_loss(discriminator_output, (y != 0.0).float())
real_loss = real_loss_func(discriminator_output, (y != 0.0).float())
if n_class > 2: # 大于2表示除了训练判别器还要训练分类器
class_loss = classified_loss(classification_output, y.long())
real_loss += class_loss
D_class_loss += class_loss.detach()
real_loss.backward()
if args.do_vis:
all_features.append(real_f_vector.detach())
# # train D on fake
if args.model == 'lstm_gan' or args.model == 'cnn_gan':
z = FloatTensor(np.random.normal(0, 1, (batch, 32, args.G_z_dim))).to(device)
else:
# uniform (-1,1)
# z = FloatTensor(np.random.uniform(-1, 1, (batch, args.G_z_dim))).to(device)
z = FloatTensor(np.random.normal(0, 1, (batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
fake_discriminator_output = D.detect_only(fake_feature)
# beta of fake
if 0 <= args.beta <= 1:
fake_loss = args.beta * adversarial_loss(fake_discriminator_output, fake_label)
else:
fake_loss = adversarial_loss(fake_discriminator_output, fake_label)
fake_loss.backward()
optimizer_D.step()
if args.fine_tune:
optimizer_E.step()
# train G
optimizer_G.zero_grad()
if args.model == 'lstm_gan' or args.model == 'cnn_gan':
z = FloatTensor(np.random.normal(0, 1, (batch, 32, args.G_z_dim))).to(device)
else:
# uniform (-1,1)
# z = FloatTensor(np.random.uniform(-1, 1, (batch, args.G_z_dim))).to(device)
z = FloatTensor(np.random.normal(0, 1, (batch, args.G_z_dim))).to(device)
fake_f_vector, D_decision = D.detect_only(G(z), return_feature=True)
if args.do_vis:
G_features.append(fake_f_vector.detach())
gd_loss = adversarial_loss(D_decision, valid_label)
# feature matching loss
fm_loss = torch.abs(torch.mean(real_f_vector.detach(), 0) - torch.mean(fake_f_vector, 0)).mean()
# fm_loss = feature_matching_loss(torch.mean(fake_f_vector, 0), torch.mean(real_f_vector.detach(), 0))
g_loss = gd_loss + 0 * fm_loss
g_loss.backward()
optimizer_G.step()
global_step += 1
D_fake_loss += fake_loss.detach()
D_real_loss += real_loss.detach()
G_d_loss += g_loss.detach()
G_train_loss += g_loss.detach() + fm_loss.detach()
FM_train_loss += fm_loss.detach()
# logger.info('[Epoch {}] Train: D_fake_loss: {}'.format(i, D_fake_loss / n_sample))
# logger.info('[Epoch {}] Train: D_real_loss: {}'.format(i, D_real_loss / n_sample))
# logger.info('[Epoch {}] Train: D_class_loss: {}'.format(i, D_class_loss / n_sample))
# logger.info('[Epoch {}] Train: G_train_loss: {}'.format(i, G_train_loss / n_sample))
# logger.info('[Epoch {}] Train: G_d_loss: {}'.format(i, G_d_loss / n_sample))
# logger.info('[Epoch {}] Train: FM_train_loss: {}'.format(i, FM_train_loss / n_sample))
# logger.info('---------------------------------------------------------------------------')
D_total_fake_loss.append(D_fake_loss / n_sample)
D_total_real_loss.append(D_real_loss / n_sample)
D_total_class_loss.append(D_class_loss / n_sample)
G_total_train_loss.append(G_train_loss / n_sample)
FM_total_train_loss.append(FM_train_loss / n_sample)
if dev_dataset:
# logger.info('#################### eval result at step {} ####################'.format(global_step))
eval_result = eval(dev_dataset)
if args.do_vis and args.do_g_eval_vis:
G_features = torch.cat(G_features, 0).cpu().numpy()
features = np.concatenate([eval_result['all_features'], G_features], axis=0)
features = TSNE(n_components=2, verbose=1, n_jobs=-1).fit_transform(features)
labels = np.concatenate([eval_result['all_binary_y'], np.array([-1] * len(G_features))], 0).reshape(
-1, 1)
data = np.concatenate([features, labels], 1)
fig = scatter_plot(data, processor)
fig.savefig(os.path.join(args.output_dir, 'plot_epoch_' + str(i) + '.png'))
valid_detection_loss.append(eval_result['detection_loss'])
valid_oos_ind_precision.append(eval_result['oos_ind_precision'])
valid_oos_ind_recall.append(eval_result['oos_ind_recall'])
valid_oos_ind_f_score.append(eval_result['oos_ind_f_score'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(-eval_result['eer'])
if signal == -1:
break
elif signal == 0:
pass
elif signal == 1:
save_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
save_model(E, path=config['bert_save_path'], model_name='bert')
# logger.info(eval_result)
# logger.info('valid_eer: {}'.format(eval_result['eer']))
# logger.info('valid_oos_ind_precision: {}'.format(eval_result['oos_ind_precision']))
# logger.info('valid_oos_ind_recall: {}'.format(eval_result['oos_ind_recall']))
# logger.info('valid_oos_ind_f_score: {}'.format(eval_result['oos_ind_f_score']))
# logger.info('valid_auc: {}'.format(eval_result['auc']))
# logger.info(
# 'valid_fpr95: {}'.format(ErrorRateAt95Recall(eval_result['all_binary_y'], eval_result['y_score'])))
if args.patience >= args.n_epoch:
save_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
save_model(E, path=config['bert_save_path'], model_name='bert')
freeze_data['D_total_fake_loss'] = D_total_fake_loss
freeze_data['D_total_real_loss'] = D_total_real_loss
freeze_data['D_total_class_loss'] = D_total_class_loss
freeze_data['G_total_train_loss'] = G_total_train_loss
freeze_data['FM_total_train_loss'] = FM_total_train_loss
freeze_data['valid_real_loss'] = valid_detection_loss
freeze_data['valid_oos_ind_precision'] = valid_oos_ind_precision
freeze_data['valid_oos_ind_recall'] = valid_oos_ind_recall
freeze_data['valid_oos_ind_f_score'] = valid_oos_ind_f_score
best_dev = -early_stopping.best_score
if args.do_vis:
all_features = torch.cat(all_features, 0).cpu().numpy()
result['all_features'] = all_features
return result
def eval(dataset):
dev_dataloader = DataLoader(dataset, batch_size=args.predict_batch_size, shuffle=False, num_workers=2)
n_sample = len(dev_dataloader)
result = dict()
# Loss function
detection_loss = torch.nn.BCELoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss(ignore_index=0).to(device)
G.eval()
D.eval()
E.eval()
all_detection_preds = []
all_class_preds = []
all_features = []
for sample in tqdm.tqdm(dev_dataloader):
sample = (i.to(device) for i in sample)
if args.dataset == 'smp':
token, mask, type_ids, knowledge_tag, y = sample
if args.dataset == 'oos-eval':
token, mask, type_ids, y = sample
batch = len(token)
# -------------------------evaluate D------------------------- #
# BERT encode sentence to feature vector
with torch.no_grad():
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
# 大于2表示除了训练判别器还要训练分类器
if n_class > 2:
f_vector, discriminator_output, classification_output = D(real_feature, return_feature=True)
all_detection_preds.append(discriminator_output)
all_class_preds.append(classification_output)
# 只预测判别器
else:
f_vector, discriminator_output = D.detect_only(real_feature, return_feature=True)
all_detection_preds.append(discriminator_output)
if args.do_vis:
all_features.append(f_vector)
all_y = LongTensor(dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds, 0).cpu() # [length, 1]
all_detection_binary_preds = convert_to_int_by_threshold(all_detection_preds.squeeze()) # [length, 1]
# print('all_detection_preds', all_detection_preds.size())
# print('all_binary_y', all_binary_y.size())
# 计算损失
detection_loss = detection_loss(all_detection_preds.squeeze(), all_binary_y.float())
result['detection_loss'] = detection_loss
if n_class > 2:
class_one_hot_preds = torch.cat(all_class_preds, 0).detach().cpu() # one hot label
class_loss = classified_loss(class_one_hot_preds, all_y) # compute loss
all_class_preds = torch.argmax(class_one_hot_preds, 1) # label
class_acc = metrics.ind_class_accuracy(all_class_preds, all_y, oos_index=0) # accuracy for ind class
logger.info(metrics.classification_report(all_y, all_class_preds, target_names=processor.id_to_label))
# logger.info(metrics.classification_report(all_binary_y, all_detection_binary_preds, target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(all_detection_binary_preds,
all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds, all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
result['fpr95'] = ErrorRateAt95Recall(all_binary_y, y_score)
if n_class > 2:
result['class_loss'] = class_loss
result['class_acc'] = class_acc
if args.do_vis:
all_features = torch.cat(all_features, 0).cpu().numpy()
result['all_features'] = all_features
freeze_data['valid_all_y'] = all_y
freeze_data['vaild_all_pred'] = all_detection_binary_preds
freeze_data['valid_score'] = y_score
return result
def test(dataset):
# load BERT and GAN
load_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
load_model(E, path=config['bert_save_path'], model_name='bert')
test_dataloader = DataLoader(dataset, batch_size=args.predict_batch_size, shuffle=False, num_workers=2)
n_sample = len(test_dataloader)
result = dict()
# Loss function
detection_loss = torch.nn.BCELoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss(ignore_index=0).to(device)
G.eval()
D.eval()
E.eval()
all_detection_preds = []
all_class_preds = []
all_features = []
for sample in tqdm.tqdm(test_dataloader):
sample = (i.to(device) for i in sample)
if args.dataset == 'smp':
token, mask, type_ids, knowledge_tag, y = sample
if args.dataset == 'oos-eval':
token, mask, type_ids, y = sample
batch = len(token)
# -------------------------evaluate D------------------------- #
# BERT encode sentence to feature vector
with torch.no_grad():
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
# 大于2表示除了训练判别器还要训练分类器
if n_class > 2:
f_vector, discriminator_output, classification_output = D(real_feature, return_feature=True)
all_detection_preds.append(discriminator_output)
all_class_preds.append(classification_output)
# 只预测判别器
else:
f_vector, discriminator_output = D.detect_only(real_feature, return_feature=True)
all_detection_preds.append(discriminator_output)
if args.do_vis:
all_features.append(f_vector)
all_y = LongTensor(dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds, 0).cpu() # [length, 1]
all_detection_binary_preds = convert_to_int_by_threshold(all_detection_preds.squeeze()) # [length, 1]
# 计算损失
detection_loss = detection_loss(all_detection_preds, all_binary_y.float())
result['detection_loss'] = detection_loss
if n_class > 2:
class_one_hot_preds = torch.cat(all_class_preds, 0).detach().cpu() # one hot label
class_loss = classified_loss(class_one_hot_preds, all_y) # compute loss
all_class_preds = torch.argmax(class_one_hot_preds, 1) # label
class_acc = metrics.ind_class_accuracy(all_class_preds, all_y, oos_index=0) # accuracy for ind class
logger.info(metrics.classification_report(all_y, all_class_preds, target_names=processor.id_to_label))
# logger.info(metrics.classification_report(all_binary_y, all_detection_binary_preds, target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(all_detection_binary_preds,
all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds, all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['all_y'] = all_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['score'] = y_score
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
result['fpr95'] = ErrorRateAt95Recall(all_binary_y, y_score)
if n_class > 2:
result['class_loss'] = class_loss
result['class_acc'] = class_acc
if args.do_vis:
all_features = torch.cat(all_features, 0).cpu().numpy()
result['all_features'] = all_features
freeze_data['test_all_y'] = all_y.tolist()
freeze_data['test_all_pred'] = all_detection_binary_preds.tolist()
freeze_data['test_score'] = y_score
return result
def get_fake_feature(num_output):
"""
生成一定数量的假特征
"""
G.eval()
fake_features = []
start = 0
batch = args.predict_batch_size
with torch.no_grad():
while start < num_output:
end = min(num_output, start + batch)
if args.model == 'lstm_gan' or args.model == 'cnn_gan':
z = FloatTensor(np.random.normal(0, 1, size=(end - start, 32, args.G_z_dim)))
else:
z = FloatTensor(np.random.normal(0, 1, size=(end - start, args.G_z_dim)))
fake_feature = G(z)
f_vector, _ = D.detect_only(fake_feature, return_feature=True)
fake_features.append(f_vector)
start += batch
return torch.cat(fake_features, 0).cpu().numpy()
if args.do_train:
if config['data_file'].startswith('binary'):
if args.optim_mode == 0:
text_train_set = processor.read_dataset(data_path, ['train'], args.mode, args.maxlen, args.minlen,
pre_exclude=True)
else:
# optimize length or sample by weight
text_train_set = processor.read_dataset(data_path, ['train'], args.mode, args.maxlen, args.minlen,
pre_exclude=False)
text_dev_set = processor.read_dataset(data_path, ['val'], args.mode, args.maxlen, args.minlen,
pre_exclude=False)
elif config['dataset'] == 'oos-eval':
text_train_set = processor.read_dataset(data_path, ['train', 'oos_train'])
text_dev_set = processor.read_dataset(data_path, ['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_train_set, text_train_len = processor.read_dataset(data_path, ['train'])
text_dev_set, text_dev_len = processor.read_dataset(data_path, ['val'])
if args.ood:
text_train_set = [sample for sample in text_train_set if sample['domain'] != 'chat']
train_features = processor.convert_to_ids(text_train_set)
dev_features = processor.convert_to_ids(text_dev_set)
if config['dataset'] == 'oos-eval':
train_dataset = OOSDataset(train_features)
dev_dataset = OOSDataset(dev_features)
if config['dataset'] == 'smp':
train_dataset = SMPDataset(train_features)
dev_dataset = SMPDataset(dev_features)
train_result = train(train_dataset, dev_dataset)
# save_feature(train_result['all_features'], os.path.join(args.output_dir, 'train_feature'))
if args.do_eval:
logger.info('#################### eval result at step {} ####################'.format(global_step))
if config['data_file'].startswith('binary'):
# don't optim dev_set by weight, don't pre_exclude it
text_dev_set = processor.read_dataset(data_path, ['val'], args.mode, args.maxlen, args.minlen,
pre_exclude=False)
elif config['dataset'] == 'oos-eval':
text_dev_set = processor.read_dataset(data_path, ['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_dev_set = processor.read_dataset(data_path, ['val'])
dev_features = processor.convert_to_ids(text_dev_set)
if config['dataset'] == 'oos-eval':
dev_dataset = OOSDataset(dev_features)
if config['dataset'] == 'smp':
dev_dataset = SMPDataset(dev_features)
eval_result = eval(dev_dataset)
# logger.info(eval_result)
logger.info('eval_eer: {}'.format(eval_result['eer']))
logger.info('eval_oos_ind_precision: {}'.format(eval_result['oos_ind_precision']))
logger.info('eval_oos_ind_recall: {}'.format(eval_result['oos_ind_recall']))
logger.info('eval_oos_ind_f_score: {}'.format(eval_result['oos_ind_f_score']))
logger.info('eval_auc: {}'.format(eval_result['auc']))
logger.info(
'eval_fpr95: {}'.format(ErrorRateAt95Recall(eval_result['all_binary_y'], eval_result['y_score'])))
gross_result['eval_oos_ind_precision'] = eval_result['oos_ind_precision']
gross_result['eval_oos_ind_recall'] = eval_result['oos_ind_recall']
gross_result['eval_oos_ind_f_score'] = eval_result['oos_ind_f_score']
gross_result['eval_eer'] = eval_result['eer']
gross_result['eval_fpr95'] = ErrorRateAt95Recall(eval_result['all_binary_y'], eval_result['y_score'])
gross_result['eval_auc'] = eval_result['auc']
freeze_data['eval_result'] = eval_result
if args.do_test:
logger.info('#################### test result at step {} ####################'.format(global_step))
if config['data_file'].startswith('binary'):
# always keep test_set unchanged
text_test_set = processor.read_dataset(data_path, ['test'])
elif config['dataset'] == 'oos-eval':
text_test_set = processor.read_dataset(data_path, ['test', 'oos_test'])
elif config['dataset'] == 'smp':
text_test_set = processor.read_dataset(data_path, ['test'])
test_features = processor.convert_to_ids(text_test_set)
if config['dataset'] == 'oos-eval':
test_dataset = OOSDataset(test_features)
if config['dataset'] == 'smp':
test_dataset = SMPDataset(test_features)
test_result = test(test_dataset)
# logger.info(test_result)
logger.info('test_eer: {}'.format(test_result['eer']))
logger.info('test_ood_ind_precision: {}'.format(test_result['oos_ind_precision']))
logger.info('test_ood_ind_recall: {}'.format(test_result['oos_ind_recall']))
logger.info('test_ood_ind_f_score: {}'.format(test_result['oos_ind_f_score']))
logger.info('test_auc: {}'.format(test_result['auc']))
logger.info('test_fpr95: {}'.format(ErrorRateAt95Recall(test_result['all_binary_y'], test_result['y_score'])))
my_plot_roc(test_result['all_binary_y'], test_result['y_score'],
os.path.join(args.output_dir, 'roc_curve.png'))
save_result(test_result, os.path.join(args.output_dir, 'test_result'))
# save_feature(test_result['all_features'], os.path.join(args.output_dir, 'test_feature'))
gross_result['test_oos_ind_precision'] = test_result['oos_ind_precision']
gross_result['test_oos_ind_recall'] = test_result['oos_ind_recall']
gross_result['test_oos_ind_f_score'] = test_result['oos_ind_f_score']
gross_result['test_eer'] = test_result['eer']
gross_result['test_fpr95'] = ErrorRateAt95Recall(test_result['all_binary_y'], test_result['y_score'])
gross_result['test_auc'] = test_result['auc']
freeze_data['test_result'] = test_result
# 输出错误cases
if config['dataset'] == 'oos-eval':
texts = [line[0] for line in text_test_set]
elif config['dataset'] == 'smp':
texts = [line['text'] for line in text_test_set]
else:
raise ValueError('The dataset {} is not supported.'.format(args.dataset))
output_cases(texts, test_result['all_binary_y'], test_result['all_detection_binary_preds'],
os.path.join(args.output_dir, 'test_cases.csv'), processor)
# confusion matrix
plot_confusion_matrix(test_result['all_binary_y'], test_result['all_detection_binary_preds'],
args.output_dir)
# beta_log_path = 'beta_log.txt'
# if os.path.exists(beta_log_path):
# flag = True
# else:
# flag = False
# with open(beta_log_path, 'a', encoding='utf-8') as f:
# if flag == False:
# f.write('seed\tbeta\tdataset\tdev_eer\ttest_eer\tdata_size\n')
# line = '\t'.join([str(config['seed']), str(config['beta']), str(config['data_file']), str(best_dev), str(test_result['eer']), '100'])
# f.write(line + '\n')
if args.do_vis:
# [2 * length, feature_fim]
features = np.concatenate([test_result['all_features'], get_fake_feature(len(test_dataset) // 2)], axis=0)
features = TSNE(n_components=2, verbose=1, n_jobs=-1).fit_transform(features) # [2 * length, 2]
# [2 * length, １]
if n_class > 2:
labels = np.concatenate([test_result['all_y'], np.array([-1] * (len(test_dataset) // 2))], 0).reshape(
(-1, 1))
else:
labels = np.concatenate([test_result['all_binary_y'], np.array([-1] * (len(test_dataset) // 2))],
0).reshape((-1, 1))
# [2 * length, 3]
data = np.concatenate([features, labels], 1)
fig = scatter_plot(data, processor)
fig.savefig(os.path.join(args.output_dir, 'plot.png'))
fig.show()
freeze_data['feature_label'] = data
# plot_train_test(train_result['all_features'], test_result['all_features'], args.output_dir)
with open(os.path.join(config['output_dir'], 'freeze_data.pkl'), 'wb') as f:
pickle.dump(freeze_data, f)
df = pd.DataFrame(data={'valid_y': freeze_data['valid_all_y'],
'valid_score': freeze_data['valid_score'],
})
df.to_csv(os.path.join(config['output_dir'], 'valid_score.csv'))
df = pd.DataFrame(data={'test_y': freeze_data['test_all_y'],
'test_score': freeze_data['test_score']
})
df.to_csv(os.path.join(config['output_dir'], 'test_score.csv'))
if args.result != 'no':
pd_result = pd.DataFrame(gross_result)
if args.seed == 16:
pd_result.to_csv(args.result + '_gross_result.csv', index=False)
else:
pd_result.to_csv(args.result + '_gross_result.csv', index=False, mode='a', header=False)
if args.seed == 8192:
print(args.result)
std_mean(args.result + '_gross_result.csv')
def main(args):
logger.info('Checking...')
check_manual_seed(args.seed)
check_args(args)
logger.info('Loading config...')
bert_config = BertConfig('config/bert.ini')
bert_config = bert_config(args.bert_type)
# for oos-eval dataset
data_config = Config('config/data.ini')
data_config = data_config(args.dataset)
# Prepare data processor
data_path = os.path.join(data_config['DataDir'],
data_config[args.data_file]) # 把目录和文件名合成一个路径
label_path = data_path.replace('.json', '.label')
if args.dataset == 'oos-eval':
processor = OOSProcessor(bert_config, maxlen=32)
elif args.dataset == 'smp':
processor = SMPProcessor(bert_config, maxlen=32)
else:
raise ValueError('The dataset {} is not supported.'.format(
args.dataset))
processor.load_label(
label_path) # Adding label_to_id and id_to_label ot processor.
n_class = len(processor.id_to_label)
config = vars(args) # 返回参数字典
config['model_save_path'] = os.path.join(args.output_dir, 'save',
'bert.pt')
config['n_class'] = n_class
logger.info('config:')
logger.info(config)
model = BertClassifier(bert_config, config) # Bert encoder
if args.fine_tune:
model.unfreeze_bert_encoder()
else:
model.freeze_bert_encoder()
model.to(device)
global_step = 0
def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset,
batch_size=args.train_batch_size //
args.gradient_accumulation_steps,
shuffle=True,
num_workers=2)
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
classified_loss = torch.nn.CrossEntropyLoss().to(device)
adversarial_loss = torch.nn.BCELoss().to(device)
# Optimizers
optimizer = AdamW(model.parameters(), args.lr)
train_loss = []
if dev_dataset:
valid_loss = []
valid_ind_class_acc = []
iteration = 0
for i in range(args.n_epoch):
model.train()
total_loss = 0
for sample in tqdm.tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
f_vector, discriminator_output, classification_output = model(
token, mask, type_ids, return_feature=True)
discriminator_output = discriminator_output.squeeze()
if args.BCE:
loss = adversarial_loss(discriminator_output,
(y != 0.0).float())
else:
loss = classified_loss(discriminator_output, y.long())
total_loss += loss.item()
loss = loss / args.gradient_accumulation_steps
loss.backward()
# bp and update parameters
if (global_step + 1) % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
global_step += 1
logger.info('[Epoch {}] Train: train_loss: {}'.format(
i, total_loss / n_sample))
logger.info('-' * 30)
train_loss.append(total_loss / n_sample)
iteration += 1
if dev_dataset:
logger.info(
'#################### eval result at step {} ####################'
.format(global_step))
eval_result = eval(dev_dataset)
valid_loss.append(eval_result['loss'])
valid_ind_class_acc.append(eval_result['ind_class_acc'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(-eval_result['eer'])
if signal == -1:
break
elif signal == 0:
pass
elif signal == 1:
save_model(model,
path=config['model_save_path'],
model_name='bert')
logger.info(eval_result)
logger.info('valid_eer: {}'.format(eval_result['eer']))
logger.info('valid_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('valid_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('valid_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('valid_auc: {}'.format(eval_result['auc']))
logger.info('valid_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
from utils.visualization import draw_curve
draw_curve(train_loss, iteration, 'train_loss', args.output_dir)
if dev_dataset:
draw_curve(valid_loss, iteration, 'valid_loss', args.output_dir)
draw_curve(valid_ind_class_acc, iteration,
'valid_ind_class_accuracy', args.output_dir)
if args.patience >= args.n_epoch:
save_model(model,
path=config['model_save_path'],
model_name='bert')
freeze_data['train_loss'] = train_loss
freeze_data['valid_loss'] = valid_loss
def eval(dataset):
dev_dataloader = DataLoader(dataset,
batch_size=args.predict_batch_size,
shuffle=False,
num_workers=2)
n_sample = len(dev_dataloader)
result = dict()
model.eval()
# Loss function
classified_loss = torch.nn.CrossEntropyLoss().to(device)
detection_loss = torch.nn.BCELoss().to(device)
all_detection_preds = []
all_class_preds = []
all_pred = []
all_logit = []
total_loss = 0
for sample in tqdm.tqdm(dev_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
with torch.no_grad():
f_vector, discriminator_output, classification_output = model(
token, mask, type_ids, return_feature=True)
discriminator_output = discriminator_output.squeeze()
all_detection_preds.append(discriminator_output)
all_y = LongTensor(
dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds,
0).cpu() # [length, 1]
all_detection_binary_preds = convert_to_int_by_threshold(
all_detection_preds.squeeze()) # [length, 1]
# 计算损失
detection_loss = detection_loss(all_detection_preds,
all_binary_y.float())
result['detection_loss'] = detection_loss
logger.info(
metrics.classification_report(all_binary_y,
all_detection_binary_preds,
target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(
all_detection_binary_preds, all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds,
all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
ind_class_acc = metrics.ind_class_accuracy(all_detection_binary_preds,
all_y)
result['ind_class_acc'] = ind_class_acc
result['loss'] = total_loss / n_sample
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
return result
def test(dataset):
load_model(model, path=config['model_save_path'], model_name='bert')
test_dataloader = DataLoader(dataset,
batch_size=args.predict_batch_size,
shuffle=False,
num_workers=2)
n_sample = len(test_dataloader)
result = dict()
model.eval()
# Loss function
classified_loss = torch.nn.CrossEntropyLoss().to(device)
detection_loss = torch.nn.BCELoss().to(device)
all_detection_preds = []
all_features = []
all_pred = []
total_loss = 0
all_logit = []
for sample in tqdm.tqdm(test_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
with torch.no_grad():
f_vector, discriminator_output, classification_output = model(
token, mask, type_ids, return_feature=True)
discriminator_output = discriminator_output.squeeze()
all_detection_preds.append(discriminator_output)
if args.do_vis:
all_features.append(f_vector)
all_y = LongTensor(
dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds,
0).cpu() # [length, 1]
all_detection_binary_preds = convert_to_int_by_threshold(
all_detection_preds.squeeze()) # [length, 1]
# 计算损失
detection_loss = detection_loss(all_detection_preds,
all_binary_y.float())
result['detection_loss'] = detection_loss
logger.info(
metrics.classification_report(all_binary_y,
all_detection_binary_preds,
target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(
all_detection_binary_preds, all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds,
all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
if args.do_vis:
all_features = torch.cat(all_features, 0).cpu().numpy()
result['all_features'] = all_features
ind_class_acc = metrics.ind_class_accuracy(all_detection_binary_preds,
all_y)
result['ind_class_acc'] = ind_class_acc
result['loss'] = total_loss / n_sample
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['all_y'] = all_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['score'] = y_score
result['y_score'] = y_score
result['all_pred'] = all_detection_binary_preds
result['auc'] = roc_auc_score(all_binary_y, y_score)
freeze_data['test_all_y'] = all_y.tolist()
freeze_data['test_all_pred'] = all_detection_binary_preds.tolist()
freeze_data['test_score'] = y_score
return result
if args.do_train:
if config['data_file'].startswith('binary'):
text_train_set = processor.read_dataset(data_path, ['train'])
text_dev_set = processor.read_dataset(data_path, ['val'])
elif config['dataset'] == 'oos-eval':
text_train_set = processor.read_dataset(data_path,
['train', 'oos_train'])
text_dev_set = processor.read_dataset(data_path,
['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_train_set = processor.read_dataset(data_path, ['train'])
text_dev_set = processor.read_dataset(data_path, ['val'])
train_features = processor.convert_to_ids(text_train_set)
train_dataset = OOSDataset(train_features)
dev_features = processor.convert_to_ids(text_dev_set)
dev_dataset = OOSDataset(dev_features)
train(train_dataset, dev_dataset)
if args.do_eval:
logger.info(
'#################### eval result at step {} ####################'.
format(global_step))
if config['data_file'].startswith('binary'):
text_dev_set = processor.read_dataset(data_path, ['val'])
elif config['dataset'] == 'oos-eval':
text_dev_set = processor.read_dataset(data_path,
['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_dev_set = processor.read_dataset(data_path, ['val'])
dev_features = processor.convert_to_ids(text_dev_set)
dev_dataset = OOSDataset(dev_features)
eval_result = eval(dev_dataset)
logger.info(eval_result)
logger.info('eval_eer: {}'.format(eval_result['eer']))
logger.info('eval_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('eval_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('eval_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('eval_auc: {}'.format(eval_result['auc']))
logger.info('eval_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
if args.do_test:
logger.info(
'#################### test result at step {} ####################'.
format(global_step))
if config['data_file'].startswith('binary'):
text_test_set = processor.read_dataset(data_path, ['test'])
elif config['dataset'] == 'oos-eval':
text_test_set = processor.read_dataset(data_path,
['test', 'oos_test'])
elif config['dataset'] == 'smp':
text_test_set = processor.read_dataset(data_path, ['test'])
test_features = processor.convert_to_ids(text_test_set)
test_dataset = OOSDataset(test_features)
test_result = test(test_dataset)
logger.info(test_result)
logger.info('test_eer: {}'.format(test_result['eer']))
logger.info('test_ood_ind_precision: {}'.format(
test_result['oos_ind_precision']))
logger.info('test_ood_ind_recall: {}'.format(
test_result['oos_ind_recall']))
logger.info('test_ood_ind_f_score: {}'.format(
test_result['oos_ind_f_score']))
logger.info('test_auc: {}'.format(test_result['auc']))
logger.info('test_fpr95: {}'.format(
ErrorRateAt95Recall(test_result['all_binary_y'],
test_result['y_score'])))
# 输出错误cases
if config['dataset'] == 'oos-eval':
texts = [line[0] for line in text_test_set]
elif config['dataset'] == 'smp':
texts = [line['text'] for line in text_test_set]
else:
raise ValueError('The dataset {} is not supported.'.format(
args.dataset))
# output_cases(texts, test_result['all_y'], test_result['all_pred'],
# os.path.join(args.output_dir, 'test_cases.csv'), processor, test_result['test_logit'])
# confusion matrix
plot_confusion_matrix(test_result['all_y'], test_result['all_pred'],
args.output_dir)
def main(args):
check_manual_seed(args.seed)
logger.info('seed: {}'.format(args.seed))
logger.info('Loading config...')
bert_config = Config('config/bert.ini')
bert_config = bert_config(args.bert_type)
# for oos-eval dataset
data_config = Config('config/data.ini')
data_config = data_config(args.dataset)
# Prepare data processor
data_path = os.path.join(data_config['DataDir'],
data_config[args.data_file]) # 把目录和文件名合成一个路径
label_path = data_path.replace('.json', '.label')
with open(data_path, 'r', encoding='utf-8') as fp:
data = json.load(fp)
for type in data:
logger.info('{} : {}'.format(type, len(data[type])))
with open(label_path, 'r', encoding='utf-8') as fp:
logger.info(json.load(fp))
if args.dataset == 'oos-eval':
processor = OOSProcessor(bert_config, maxlen=32)
logger.info('OOSProcessor')
elif args.dataset == 'smp':
# processor = SMPProcessor(bert_config, maxlen=32)
processor = PosSMPProcessor(bert_config, maxlen=32)
logger.info('SMPProcessor')
else:
raise ValueError('The dataset {} is not supported.'.format(
args.dataset))
processor.load_label(
label_path) # Adding label_to_id and id_to_label ot processor.
processor.load_pos('data/pos.json')
logger.info("label_to_id: {}".format(processor.label_to_id))
logger.info("id_to_label: {}".format(processor.id_to_label))
n_class = len(processor.id_to_label)
config = vars(args) # 返回参数字典
config['gan_save_path'] = os.path.join(args.output_dir, 'save', 'gan.pt')
config['bert_save_path'] = os.path.join(args.output_dir, 'save', 'bert.pt')
config['n_class'] = n_class
logger.info('config:')
logger.info(config)
from model.pos_emb_v2 import Pos_emb
E = BertModel.from_pretrained(
bert_config['PreTrainModelDir']) # Bert encoder
config['pos_dim'] = args.pos_dim
config['batch_size'] = args.train_batch_size
config['n_pos'] = len(processor.pos)
config['device'] = device
config['nhead'] = 2
config['num_layers'] = 1
config['maxlen'] = processor.maxlen
print('config', config)
print(processor.pos)
pos = Pos_emb(config)
if args.fine_tune:
for param in E.parameters():
param.requires_grad = True
else:
for param in E.parameters():
param.requires_grad = False
pos.to(device)
E.to(device)
# logger.info(('pos_dim: {}, feature_dim'.format(config['pos_dim'], config['feature_dim'])))
global_step = 0
def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset,
batch_size=args.train_batch_size,
shuffle=True,
num_workers=2)
global best_dev
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
adversarial_loss = torch.nn.BCELoss().to(device)
# Optimizers
optimizer_pos = torch.optim.Adam(pos.parameters(), lr=args.pos_lr)
optimizer_E = AdamW(E.parameters(), args.bert_lr)
valid_detection_loss = []
valid_oos_ind_precision = []
valid_oos_ind_recall = []
valid_oos_ind_f_score = []
train_loss = []
iteration = 0
for i in range(args.n_epoch):
logger.info('***********************************')
logger.info('epoch: {}'.format(i))
# Initialize model state
pos.train()
E.train()
total_loss = 0
for sample in tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, pos1, pos2, pos_mask, y = sample
batch = len(token)
optimizer_E.zero_grad()
optimizer_pos.zero_grad()
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
out = pos(pos1, pos2, real_feature)
loss = adversarial_loss(out, y.float())
loss.backward()
total_loss += loss.detach()
if args.fine_tune:
optimizer_E.step()
optimizer_pos.step()
logger.info('[Epoch {}] Train: loss: {}'.format(
i, total_loss / n_sample))
logger.info(
'---------------------------------------------------------------------------'
)
train_loss.append(total_loss / n_sample)
iteration += 1
if dev_dataset:
logger.info(
'#################### eval result at step {} ####################'
.format(global_step))
eval_result = eval(dev_dataset)
valid_detection_loss.append(eval_result['detection_loss'])
valid_oos_ind_precision.append(
eval_result['oos_ind_precision'])
valid_oos_ind_recall.append(eval_result['oos_ind_recall'])
valid_oos_ind_f_score.append(eval_result['oos_ind_f_score'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(-eval_result['eer'])
if signal == -1:
break
# elif signal == 0:
# pass
# elif signal == 1:
# save_gan_model(D, G, config['gan_save_path'])
# if args.fine_tune:
# save_model(E, path=config['bert_save_path'], model_name='bert')
logger.info(eval_result)
logger.info('valid_eer: {}'.format(eval_result['eer']))
logger.info('valid_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('valid_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('valid_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('valid_auc: {}'.format(eval_result['auc']))
logger.info('valid_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
best_dev = -early_stopping.best_score
# 绘制训练损失曲线
from utils.visualization import draw_curve
draw_curve(train_loss, iteration, 'train_loss', args.output_dir)
def eval(dataset):
dev_dataloader = DataLoader(dataset,
batch_size=args.predict_batch_size,
shuffle=False,
num_workers=2)
n_sample = len(dev_dataloader)
result = dict()
detection_loss = torch.nn.BCELoss().to(device)
pos.eval()
E.eval()
all_detection_preds = []
for sample in tqdm(dev_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, pos1, pos2, pos_mask, y = sample
batch = len(token)
# -------------------------evaluate D------------------------- #
# BERT encode sentence to feature vector
with torch.no_grad():
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
out = pos(pos1, pos2, real_feature)
all_detection_preds.append(out)
all_y = LongTensor(
dataset.dataset[:, -4].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds,
0).cpu() # [length, 1]
all_detection_binary_preds = convert_to_int_by_threshold(
all_detection_preds.squeeze()) # [length, 1]
# 计算损失
detection_loss = detection_loss(all_detection_preds,
all_binary_y.float())
result['detection_loss'] = detection_loss
logger.info(
metrics.classification_report(all_binary_y,
all_detection_binary_preds,
target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(
all_detection_binary_preds, all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds,
all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
return result
def test(dataset):
# # load BERT and GAN
# load_gan_model(D, G, config['gan_save_path'])
# if args.fine_tune:
# load_model(E, path=config['bert_save_path'], model_name='bert')
#
test_dataloader = DataLoader(dataset,
batch_size=args.predict_batch_size,
shuffle=False,
num_workers=2)
n_sample = len(test_dataloader)
result = dict()
# Loss function
detection_loss = torch.nn.BCELoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss(ignore_index=0).to(device)
pos.eval()
E.eval()
all_detection_preds = []
all_class_preds = []
all_features = []
for sample in tqdm(test_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, pos1, pos2, pos_mask, y = sample
batch = len(token)
# -------------------------evaluate D------------------------- #
# BERT encode sentence to feature vector
with torch.no_grad():
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
out = pos(pos1, pos2, real_feature)
all_detection_preds.append(out)
all_y = LongTensor(
dataset.dataset[:, -4].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds,
0).cpu() # [length, 1]
all_detection_binary_preds = convert_to_int_by_threshold(
all_detection_preds.squeeze()) # [length, 1]
# 计算损失
detection_loss = detection_loss(all_detection_preds,
all_binary_y.float())
result['detection_loss'] = detection_loss
logger.info(
metrics.classification_report(all_binary_y,
all_detection_binary_preds,
target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(
all_detection_binary_preds, all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds,
all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
return result
if args.do_train:
if config['data_file'].startswith('binary'):
text_train_set = processor.read_dataset(data_path, ['train'])
text_dev_set = processor.read_dataset(data_path, ['val'])
elif config['dataset'] == 'oos-eval':
text_train_set = processor.read_dataset(data_path,
['train', 'oos_train'])
text_dev_set = processor.read_dataset(data_path,
['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_train_set = processor.read_dataset(data_path, ['train'])
text_dev_set = processor.read_dataset(data_path, ['val'])
train_features = processor.convert_to_ids(text_train_set)
train_dataset = PosOOSDataset(train_features)
dev_features = processor.convert_to_ids(text_dev_set)
dev_dataset = PosOOSDataset(dev_features)
train(train_dataset, dev_dataset)
if args.do_eval:
logger.info(
'#################### eval result at step {} ####################'.
format(global_step))
if config['data_file'].startswith('binary'):
text_dev_set = processor.read_dataset(data_path, ['val'])
elif config['dataset'] == 'oos-eval':
text_dev_set = processor.read_dataset(data_path,
['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_dev_set = processor.read_dataset(data_path, ['val'])
dev_features = processor.convert_to_ids(text_dev_set)
dev_dataset = PosOOSDataset(dev_features)
eval_result = eval(dev_dataset)
logger.info(eval_result)
logger.info('eval_eer: {}'.format(eval_result['eer']))
logger.info('eval_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('eval_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('eval_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('eval_auc: {}'.format(eval_result['auc']))
logger.info('eval_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
if args.do_test:
logger.info(
'#################### test result at step {} ####################'.
format(global_step))
if config['data_file'].startswith('binary'):
text_test_set = processor.read_dataset(data_path, ['test'])
elif config['dataset'] == 'oos-eval':
text_test_set = processor.read_dataset(data_path,
['test', 'oos_test'])
elif config['dataset'] == 'smp':
text_test_set = processor.read_dataset(data_path, ['test'])
test_features = processor.convert_to_ids(text_test_set)
test_dataset = PosOOSDataset(test_features)
test_result = test(test_dataset)
logger.info(test_result)
logger.info('test_eer: {}'.format(test_result['eer']))
logger.info('test_ood_ind_precision: {}'.format(
test_result['oos_ind_precision']))
logger.info('test_ood_ind_recall: {}'.format(
test_result['oos_ind_recall']))
logger.info('test_ood_ind_f_score: {}'.format(
test_result['oos_ind_f_score']))
logger.info('test_auc: {}'.format(test_result['auc']))
logger.info('test_fpr95: {}'.format(
ErrorRateAt95Recall(test_result['all_binary_y'],
test_result['y_score'])))
my_plot_roc(test_result['all_binary_y'], test_result['y_score'],
os.path.join(args.output_dir, 'roc_curve.png'))
save_result(test_result, os.path.join(args.output_dir, 'test_result'))
# 输出错误cases
if config['dataset'] == 'oos-eval':
texts = [line[0] for line in text_test_set]
elif config['dataset'] == 'smp':
texts = [line['text'] for line in text_test_set]
else:
raise ValueError('The dataset {} is not supported.'.format(
args.dataset))
output_cases(texts, test_result['all_binary_y'],
test_result['all_detection_binary_preds'],
os.path.join(args.output_dir, 'test_cases.csv'),
processor, test_result['y_score'])
# confusion matrix
plot_confusion_matrix(test_result['all_binary_y'],
test_result['all_detection_binary_preds'],
args.output_dir)
beta_log_path = 'beta_log.txt'
if os.path.exists(beta_log_path):
flag = True
else:
flag = False
with open(beta_log_path, 'a', encoding='utf-8') as f:
if flag == False:
f.write('seed\tdataset\tdev_eer\ttest_eer\tdata_size\n')
line = '\t'.join([
str(config['seed']),
str(config['data_file']),
str(best_dev),
str(test_result['eer']), '100'
])
f.write(line + '\n')
def test(dataset):
# load BERT and GAN
load_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
load_model(E, path=config['bert_save_path'], model_name='bert')
test_dataloader = DataLoader(dataset, batch_size=args.predict_batch_size, shuffle=False, num_workers=2)
n_sample = len(test_dataloader)
result = dict()
# Loss function
detection_loss = torch.nn.BCELoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss(ignore_index=0).to(device)
G.eval()
D.eval()
E.eval()
all_detection_preds = []
all_class_preds = []
all_features = []
for sample in tqdm.tqdm(test_dataloader):
sample = (i.to(device) for i in sample)
if args.dataset == 'smp':
token, mask, type_ids, knowledge_tag, y = sample
if args.dataset == 'oos-eval':
token, mask, type_ids, y = sample
batch = len(token)
# -------------------------evaluate D------------------------- #
# BERT encode sentence to feature vector
with torch.no_grad():
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
# 大于2表示除了训练判别器还要训练分类器
if n_class > 2:
f_vector, discriminator_output, classification_output = D(real_feature, return_feature=True)
all_detection_preds.append(discriminator_output)
all_class_preds.append(classification_output)
# 只预测判别器
else:
f_vector, discriminator_output = D.detect_only(real_feature, return_feature=True)
all_detection_preds.append(discriminator_output)
if args.do_vis:
all_features.append(f_vector)
all_y = LongTensor(dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds, 0).cpu() # [length, 1]
all_detection_binary_preds = convert_to_int_by_threshold(all_detection_preds.squeeze()) # [length, 1]
# 计算损失
detection_loss = detection_loss(all_detection_preds, all_binary_y.float())
result['detection_loss'] = detection_loss
if n_class > 2:
class_one_hot_preds = torch.cat(all_class_preds, 0).detach().cpu() # one hot label
class_loss = classified_loss(class_one_hot_preds, all_y) # compute loss
all_class_preds = torch.argmax(class_one_hot_preds, 1) # label
class_acc = metrics.ind_class_accuracy(all_class_preds, all_y, oos_index=0) # accuracy for ind class
logger.info(metrics.classification_report(all_y, all_class_preds, target_names=processor.id_to_label))
# logger.info(metrics.classification_report(all_binary_y, all_detection_binary_preds, target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(all_detection_binary_preds,
all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds, all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['all_y'] = all_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['score'] = y_score
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
result['fpr95'] = ErrorRateAt95Recall(all_binary_y, y_score)
if n_class > 2:
result['class_loss'] = class_loss
result['class_acc'] = class_acc
if args.do_vis:
all_features = torch.cat(all_features, 0).cpu().numpy()
result['all_features'] = all_features
freeze_data['test_all_y'] = all_y.tolist()
freeze_data['test_all_pred'] = all_detection_binary_preds.tolist()
freeze_data['test_score'] = y_score
return result
def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset,
batch_size=args.train_batch_size,
shuffle=True,
num_workers=2)
global best_dev
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
adversarial_loss = torch.nn.BCELoss().to(device)
# Optimizers
optimizer_pos = torch.optim.Adam(pos.parameters(), lr=args.pos_lr)
optimizer_E = AdamW(E.parameters(), args.bert_lr)
valid_detection_loss = []
valid_oos_ind_precision = []
valid_oos_ind_recall = []
valid_oos_ind_f_score = []
train_loss = []
iteration = 0
for i in range(args.n_epoch):
logger.info('***********************************')
logger.info('epoch: {}'.format(i))
# Initialize model state
pos.train()
E.train()
total_loss = 0
for sample in tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, pos1, pos2, pos_mask, y = sample
batch = len(token)
optimizer_E.zero_grad()
optimizer_pos.zero_grad()
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
out = pos(pos1, pos2, real_feature)
loss = adversarial_loss(out, y.float())
loss.backward()
total_loss += loss.detach()
if args.fine_tune:
optimizer_E.step()
optimizer_pos.step()
logger.info('[Epoch {}] Train: loss: {}'.format(
i, total_loss / n_sample))
logger.info(
'---------------------------------------------------------------------------'
)
train_loss.append(total_loss / n_sample)
iteration += 1
if dev_dataset:
logger.info(
'#################### eval result at step {} ####################'
.format(global_step))
eval_result = eval(dev_dataset)
valid_detection_loss.append(eval_result['detection_loss'])
valid_oos_ind_precision.append(
eval_result['oos_ind_precision'])
valid_oos_ind_recall.append(eval_result['oos_ind_recall'])
valid_oos_ind_f_score.append(eval_result['oos_ind_f_score'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(-eval_result['eer'])
if signal == -1:
break
# elif signal == 0:
# pass
# elif signal == 1:
# save_gan_model(D, G, config['gan_save_path'])
# if args.fine_tune:
# save_model(E, path=config['bert_save_path'], model_name='bert')
logger.info(eval_result)
logger.info('valid_eer: {}'.format(eval_result['eer']))
logger.info('valid_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('valid_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('valid_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('valid_auc: {}'.format(eval_result['auc']))
logger.info('valid_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
best_dev = -early_stopping.best_score
# 绘制训练损失曲线
from utils.visualization import draw_curve
draw_curve(train_loss, iteration, 'train_loss', args.output_dir)
def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset,
batch_size=args.train_batch_size,
shuffle=True,
num_workers=2)
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
adversarial_loss = torch.nn.BCELoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss().to(device)
# Optimizers
optimizer_G = torch.optim.Adam(G.parameters(),
lr=args.G_lr) # optimizer for generator
optimizer_D = torch.optim.Adam(
D.parameters(), lr=args.D_lr) # optimizer for discriminator
optimizer_E = AdamW(E.parameters(), args.bert_lr)
G_total_train_loss = []
D_total_fake_loss = []
D_total_real_loss = []
FM_total_train_loss = []
D_total_class_loss = []
valid_detection_loss = []
valid_oos_ind_recall = []
valid_oos_ind_f_score = []
train_loss = []
iteration = 0
for i in range(args.n_epoch):
# Initialize model state
G.train()
D.train()
E.train()
G_train_loss = 0
D_fake_loss = 0
D_real_loss = 0
FM_train_loss = 0
D_class_loss = 0
total_loss = 0
for sample in tqdm.tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
# the label used to train generator and discriminator.
valid_label = FloatTensor(batch, 1).fill_(1.0).detach()
fake_label = FloatTensor(batch, 1).fill_(0.0).detach()
optimizer_E.zero_grad()
sequence_output, pooled_output = E(token,
mask,
type_ids,
return_dict=False)
real_feature = pooled_output
# train D on real
optimizer_D.zero_grad()
real_f_vector, discriminator_output, classification_output = D(
real_feature, return_feature=True)
discriminator_output = discriminator_output.squeeze()
real_loss = adversarial_loss(discriminator_output,
(y != 0.0).float())
if n_class > 2: # 大于2表示除了训练判别器还要训练分类器
class_loss = classified_loss(classification_output,
y.long())
real_loss += class_loss
D_class_loss += class_loss.detach()
real_loss.backward()
# # train D on fake
z = FloatTensor(np.random.normal(
0, 1, (batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
fake_discriminator_output = D.detect_only(fake_feature)
fake_loss = args.beta * adversarial_loss(
fake_discriminator_output, fake_label)
fake_loss.backward()
optimizer_D.step()
if args.fine_tune:
optimizer_E.step()
# train G
optimizer_G.zero_grad()
z = FloatTensor(np.random.normal(
0, 1, (batch, args.G_z_dim))).to(device)
fake_f_vector, D_decision = D.detect_only(G(z),
return_feature=True)
gd_loss = adversarial_loss(D_decision, valid_label)
fm_loss = torch.abs(
torch.mean(real_f_vector.detach(), 0) -
torch.mean(fake_f_vector, 0)).mean()
g_loss = gd_loss + 0 * fm_loss
g_loss.backward()
optimizer_G.step()
global_step += 1
D_fake_loss += fake_loss.detach()
D_real_loss += real_loss.detach()
G_train_loss += g_loss.detach() + fm_loss.detach()
FM_train_loss += fm_loss.detach()
# train_loss.append(total_loss / n_sample)
# iteration += 1
logger.info('[Epoch {}] Train: D_fake_loss: {}'.format(
i, D_fake_loss / n_sample))
logger.info('[Epoch {}] Train: D_real_loss: {}'.format(
i, D_real_loss / n_sample))
logger.info('[Epoch {}] Train: D_class_loss: {}'.format(
i, D_class_loss / n_sample))
logger.info('[Epoch {}] Train: G_train_loss: {}'.format(
i, G_train_loss / n_sample))
logger.info('[Epoch {}] Train: FM_train_loss: {}'.format(
i, FM_train_loss / n_sample))
logger.info(
'---------------------------------------------------------------------------'
)
D_total_fake_loss.append(D_fake_loss / n_sample)
D_total_real_loss.append(D_real_loss / n_sample)
D_total_class_loss.append(D_class_loss / n_sample)
G_total_train_loss.append(G_train_loss / n_sample)
FM_total_train_loss.append(FM_train_loss / n_sample)
if dev_dataset:
logger.info(
'#################### eval result at step {} ####################'
.format(global_step))
eval_result = eval(dev_dataset)
valid_detection_loss.append(eval_result['detection_loss'])
valid_oos_ind_recall.append(eval_result['oos_ind_recall'])
valid_oos_ind_f_score.append(eval_result['oos_ind_f_score'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(-eval_result['eer'])
if signal == -1:
break
elif signal == 0:
pass
elif signal == 1:
save_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
save_model(E,
path=config['bert_save_path'],
model_name='bert')
logger.info(eval_result)
logger.info('valid_eer: {}'.format(eval_result['eer']))
logger.info('valid_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('valid_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('valid_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('valid_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
if args.patience >= args.n_epoch:
save_gan_model(D, G, config['gan_save_path'])
if args.fine_tune:
save_model(E, path=config['bert_save_path'], model_name='bert')
freeze_data['D_total_fake_loss'] = D_total_fake_loss
freeze_data['D_total_real_loss'] = D_total_real_loss
freeze_data['D_total_class_loss'] = D_total_class_loss
freeze_data['G_total_train_loss'] = G_total_train_loss
freeze_data['FM_total_train_loss'] = FM_total_train_loss
freeze_data['valid_real_loss'] = valid_detection_loss
freeze_data['valid_oos_ind_recall'] = valid_oos_ind_recall
freeze_data['valid_oos_ind_f_score'] = valid_oos_ind_f_score
def main(args):
check_manual_seed(args.seed)
logger.info('seed: {}'.format(args.seed))
logger.info('Loading config...')
bert_config = Config('config/bert.ini')
bert_config = bert_config(args.bert_type)
# for oos-eval dataset
data_config = Config('config/data.ini')
data_config = data_config(args.dataset)
# Prepare data processor
data_path = os.path.join(data_config['DataDir'],
data_config[args.data_file]) # 把目录和文件名合成一个路径
label_path = data_path.replace('.json', '.label')
with open(data_path, 'r', encoding='utf-8') as fp:
data = json.load(fp)
for type in data:
logger.info('{} : {}'.format(type, len(data[type])))
with open(label_path, 'r', encoding='utf-8') as fp:
logger.info(json.load(fp))
if args.dataset == 'oos-eval':
processor = OOSProcessor(bert_config, maxlen=32)
logger.info('OOSProcessor')
elif args.dataset == 'smp':
processor = SMPProcessor(bert_config, maxlen=32)
logger.info('SMPProcessor')
else:
raise ValueError('The dataset {} is not supported.'.format(
args.dataset))
processor.load_label(
label_path) # Adding label_to_id and id_to_label ot processor.
logger.info("label_to_id: {}".format(processor.label_to_id))
logger.info("id_to_label: {}".format(processor.id_to_label))
n_class = len(processor.id_to_label)
config = vars(args) # 返回参数字典
config['gan_save_path'] = os.path.join(args.output_dir, 'save', 'gan.pt')
config['bert_save_path'] = os.path.join(args.output_dir, 'save', 'bert.pt')
config['n_class'] = n_class
logger.info('config:')
logger.info(config)
D_detect = Discriminator(config)
D_g = Discriminator(config)
G = Generator(config)
E = BertModel.from_pretrained(
bert_config['PreTrainModelDir']) # Bert encoder
if args.fine_tune:
for param in E.parameters():
param.requires_grad = True
else:
for param in E.parameters():
param.requires_grad = False
D_detect.to(device)
D_g.to(device)
G.to(device)
E.to(device)
global_step = 0
def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset,
batch_size=args.train_batch_size,
shuffle=True,
num_workers=2)
global best_dev
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
adversarial_loss = torch.nn.BCELoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss().to(device)
# Optimizers
optimizer_G = torch.optim.Adam(G.parameters(),
lr=args.G_lr) # optimizer for generator
optimizer_D_detect = torch.optim.Adam(
D_detect.parameters(),
lr=args.D_detect_lr) # optimizer for discriminator
optimizer_D_g = torch.optim.Adam(D_g.parameters(), lr=args.D_g_lr)
optimizer_E = AdamW(E.parameters(), args.bert_lr)
G_total_train_loss = []
D_total_fake_loss = []
D_total_real_loss = []
FM_total_train_loss = []
D_total_class_loss = []
valid_detection_loss = []
valid_oos_ind_precision = []
valid_oos_ind_recall = []
valid_oos_ind_f_score = []
for i in range(args.n_epoch):
logger.info('***********************************')
logger.info('epoch: {}'.format(i))
# Initialize model state
G.train()
D_detect.train()
D_g.train()
E.train()
D_g_real_loss = 0
D_g_fake_loss = 0
D_detect_real_loss = 0
D_detect_fake_loss = 0
G_loss = 0
for sample in tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
all_g_D_g_loss = 0
D_gen_real_loss = None
D_gen_fake_loss = None
# the label used to train generator and discriminator.
valid_label = FloatTensor(batch, 1).fill_(1.0).detach()
fake_label = FloatTensor(batch, 1).fill_(0.0).detach()
optimizer_E.zero_grad()
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
for gan_i in range(args.time):
# ------------------------- train D_g -------------------------#
# train on D_g real
id_sample = (y == 1.0)
weight = torch.ones(len(id_sample)).to(
device) - id_sample * 1.0 # 除去id损失, 只用ood数据
real_loss_func = torch.nn.BCELoss(weight=weight).to(device)
optimizer_D_g.zero_grad()
D_gen_real_discriminator_output, f_vector = D_g(
real_feature)
# D_gen_real_loss = adversarial_loss(D_gen_real_discriminator_output, valid_label) # 判别器对真实样本的损失
D_gen_real_loss = real_loss_func(
D_gen_real_discriminator_output.squeeze(),
valid_label.squeeze())
# train on D_g fake
z = FloatTensor(
np.random.normal(0, 1,
(batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
D_gen_fake_discriminator_output, f_vector = D_g(
fake_feature)
D_gen_fake_loss = adversarial_loss(
D_gen_fake_discriminator_output.squeeze(),
fake_label.squeeze()) # 判别器对假样本的损失
D_gen_loss = D_gen_real_loss + D_gen_fake_loss
D_gen_loss.backward(retain_graph=True) # 保存计算图，生成器还要使用
optimizer_D_g.step()
# ------------------------- train G -------------------------#
list_g_D_g_loss = []
for gi in range(args.g_time):
optimizer_G.zero_grad()
z = FloatTensor(
np.random.normal(0, 1,
(batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
D_gen_fake_discriminator_output, f_vector = D_g(
fake_feature)
g_D_g_loss = adversarial_loss(
D_gen_fake_discriminator_output.squeeze(),
valid_label.squeeze()) # 生成器欺骗 D_g, 认为是真实样本
g_D_g_loss.backward()
optimizer_G.step()
all_g_D_g_loss += g_D_g_loss.detach()
list_g_D_g_loss.append(g_D_g_loss)
# ------------------------- train D_detect_ood -------------------------#
# train on real(detect real sample)
optimizer_D_detect.zero_grad()
ood_real_detect_discriminator_output, f_vector = D_detect(
real_feature)
ood_real_detect_loss = adversarial_loss(
ood_real_detect_discriminator_output.squeeze(),
(y != 0.0).float()) # ood 判别器对真实样本的损失
# train on fake(detect fake sample) fake sample is fake id -> ood
z = FloatTensor(np.random.normal(
0, 1, (batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
ood_fake_detect_discriminator_output, f_vector = D_detect(
fake_feature)
ood_fake_detect_loss = adversarial_loss(
ood_fake_detect_discriminator_output.squeeze(),
fake_label.squeeze()) # 假ood认为是ood样本
D_detect_loss = args.beta * ood_real_detect_loss + (
1 - args.beta) * ood_fake_detect_loss # 真实样本与假ood样本影响比例
D_detect_loss.backward()
optimizer_D_detect.step()
if args.fine_tune:
optimizer_E.step()
global_step += 1
D_g_real_loss += D_gen_real_loss.detach()
D_g_fake_loss += D_gen_fake_loss.detach()
D_detect_real_loss += ood_real_detect_loss.detach()
D_detect_fake_loss += ood_fake_detect_loss.detach()
G_loss += all_g_D_g_loss
logger.info('[Epoch {}] Train: D_g_real_loss: {}'.format(
i, D_g_real_loss / n_sample))
logger.info('[Epoch {}] Train: D_g_fake_loss: {}'.format(
i, D_g_fake_loss / n_sample))
logger.info('[Epoch {}] Train: D_detect_real_loss: {}'.format(
i, D_detect_real_loss / n_sample))
logger.info('[Epoch {}] Train: D_detect_fake_loss: {}'.format(
i, D_detect_fake_loss / n_sample))
logger.info('[Epoch {}] Train: G_loss: {}'.format(
i, G_loss / n_sample))
logger.info(
'---------------------------------------------------------------------------'
)
if dev_dataset:
logger.info(
'#################### eval result at step {} ####################'
.format(global_step))
eval_result = eval(dev_dataset)
valid_detection_loss.append(eval_result['detection_loss'])
valid_oos_ind_precision.append(
eval_result['oos_ind_precision'])
valid_oos_ind_recall.append(eval_result['oos_ind_recall'])
valid_oos_ind_f_score.append(eval_result['oos_ind_f_score'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(-eval_result['eer'])
if signal == -1:
break
# elif signal == 0:
# pass
# elif signal == 1:
# save_gan_model(D, G, config['gan_save_path'])
# if args.fine_tune:
# save_model(E, path=config['bert_save_path'], model_name='bert')
logger.info(eval_result)
logger.info('valid_eer: {}'.format(eval_result['eer']))
logger.info('valid_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('valid_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('valid_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('valid_auc: {}'.format(eval_result['auc']))
logger.info('valid_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
best_dev = -early_stopping.best_score
def eval(dataset):
dev_dataloader = DataLoader(dataset,
batch_size=args.predict_batch_size,
shuffle=False,
num_workers=2)
n_sample = len(dev_dataloader)
result = dict()
detection_loss = torch.nn.BCELoss().to(device)
D_detect.eval()
E.eval()
all_detection_preds = []
for sample in tqdm(dev_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
# -------------------------evaluate D------------------------- #
# BERT encode sentence to feature vector
with torch.no_grad():
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
discriminator_output, f_vector = D_detect(real_feature)
all_detection_preds.append(discriminator_output)
all_y = LongTensor(
dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds,
0).cpu() # [length, 1]
all_detection_binary_preds = convert_to_int_by_threshold(
all_detection_preds.squeeze()) # [length, 1]
# 计算损失
detection_loss = detection_loss(all_detection_preds,
all_binary_y.float())
result['detection_loss'] = detection_loss
logger.info(
metrics.classification_report(all_binary_y,
all_detection_binary_preds,
target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(
all_detection_binary_preds, all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds,
all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
return result
def test(dataset):
# # load BERT and GAN
# load_gan_model(D, G, config['gan_save_path'])
# if args.fine_tune:
# load_model(E, path=config['bert_save_path'], model_name='bert')
#
test_dataloader = DataLoader(dataset,
batch_size=args.predict_batch_size,
shuffle=False,
num_workers=2)
n_sample = len(test_dataloader)
result = dict()
# Loss function
detection_loss = torch.nn.BCELoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss(ignore_index=0).to(device)
D_detect.eval()
E.eval()
all_detection_preds = []
all_class_preds = []
all_features = []
for sample in tqdm(test_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
# -------------------------evaluate D------------------------- #
# BERT encode sentence to feature vector
with torch.no_grad():
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
discriminator_output, f_vector = D_detect(real_feature)
all_detection_preds.append(discriminator_output)
if args.do_vis:
all_features.append(f_vector)
all_y = LongTensor(
dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
all_detection_preds = torch.cat(all_detection_preds,
0).cpu() # [length, 1]
all_detection_binary_preds = convert_to_int_by_threshold(
all_detection_preds.squeeze()) # [length, 1]
# 计算损失
detection_loss = detection_loss(all_detection_preds,
all_binary_y.float())
result['detection_loss'] = detection_loss
logger.info(
metrics.classification_report(all_binary_y,
all_detection_binary_preds,
target_names=['oos', 'in']))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(
all_detection_binary_preds, all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds,
all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, y_score)
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
if args.do_vis:
all_features = torch.cat(all_features, 0).cpu().numpy()
result['all_features'] = all_features
return result
def get_fake_feature(num_output):
"""
生成一定数量的假特征
"""
G.eval()
fake_features = []
start = 0
batch = args.predict_batch_size
with torch.no_grad():
while start < num_output:
end = min(num_output, start + batch)
z = FloatTensor(
np.random.normal(0, 1, size=(end - start, args.G_z_dim)))
fake_feature = G(z)
discriminator_output, f_vector = D_detect(fake_feature)
fake_features.append(f_vector)
start += batch
return torch.cat(fake_features, 0).cpu().numpy()
if args.do_train:
if config['data_file'].startswith('binary'):
text_train_set = processor.read_dataset(data_path, ['train'])
text_dev_set = processor.read_dataset(data_path, ['val'])
elif config['dataset'] == 'oos-eval':
text_train_set = processor.read_dataset(data_path,
['train', 'oos_train'])
text_dev_set = processor.read_dataset(data_path,
['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_train_set = processor.read_dataset(data_path, ['train'])
text_dev_set = processor.read_dataset(data_path, ['val'])
train_features = processor.convert_to_ids(text_train_set)
train_dataset = OOSDataset(train_features)
dev_features = processor.convert_to_ids(text_dev_set)
dev_dataset = OOSDataset(dev_features)
train(train_dataset, dev_dataset)
if args.do_eval:
logger.info(
'#################### eval result at step {} ####################'.
format(global_step))
if config['data_file'].startswith('binary'):
text_dev_set = processor.read_dataset(data_path, ['val'])
elif config['dataset'] == 'oos-eval':
text_dev_set = processor.read_dataset(data_path,
['val', 'oos_val'])
elif config['dataset'] == 'smp':
text_dev_set = processor.read_dataset(data_path, ['val'])
dev_features = processor.convert_to_ids(text_dev_set)
dev_dataset = OOSDataset(dev_features)
eval_result = eval(dev_dataset)
logger.info(eval_result)
logger.info('eval_eer: {}'.format(eval_result['eer']))
logger.info('eval_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('eval_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('eval_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('eval_auc: {}'.format(eval_result['auc']))
logger.info('eval_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
if args.do_test:
logger.info(
'#################### test result at step {} ####################'.
format(global_step))
if config['data_file'].startswith('binary'):
text_test_set = processor.read_dataset(data_path, ['test'])
elif config['dataset'] == 'oos-eval':
text_test_set = processor.read_dataset(data_path,
['test', 'oos_test'])
elif config['dataset'] == 'smp':
text_test_set = processor.read_dataset(data_path, ['test'])
test_features = processor.convert_to_ids(text_test_set)
test_dataset = OOSDataset(test_features)
test_result = test(test_dataset)
logger.info(test_result)
logger.info('test_eer: {}'.format(test_result['eer']))
logger.info('test_ood_ind_precision: {}'.format(
test_result['oos_ind_precision']))
logger.info('test_ood_ind_recall: {}'.format(
test_result['oos_ind_recall']))
logger.info('test_ood_ind_f_score: {}'.format(
test_result['oos_ind_f_score']))
logger.info('test_auc: {}'.format(test_result['auc']))
logger.info('test_fpr95: {}'.format(
ErrorRateAt95Recall(test_result['all_binary_y'],
test_result['y_score'])))
my_plot_roc(test_result['all_binary_y'], test_result['y_score'],
os.path.join(args.output_dir, 'roc_curve.png'))
save_result(test_result, os.path.join(args.output_dir, 'test_result'))
# 输出错误cases
if config['dataset'] == 'oos-eval':
texts = [line[0] for line in text_test_set]
elif config['dataset'] == 'smp':
texts = [line['text'] for line in text_test_set]
else:
raise ValueError('The dataset {} is not supported.'.format(
args.dataset))
output_cases(texts, test_result['all_binary_y'],
test_result['all_detection_binary_preds'],
os.path.join(args.output_dir,
'test_cases.csv'), processor)
# confusion matrix
plot_confusion_matrix(test_result['all_binary_y'],
test_result['all_detection_binary_preds'],
args.output_dir)
beta_log_path = 'beta_log.txt'
if os.path.exists(beta_log_path):
flag = True
else:
flag = False
with open(beta_log_path, 'a', encoding='utf-8') as f:
if flag == False:
f.write('seed\tbeta\tdataset\tdev_eer\ttest_eer\tdata_size\n')
line = '\t'.join([
str(config['seed']),
str(config['beta']),
str(config['data_file']),
str(best_dev),
str(test_result['eer']), '100'
])
f.write(line + '\n')
if args.do_vis:
# [2 * length, feature_fim]
features = np.concatenate([
test_result['all_features'],
get_fake_feature(len(test_dataset) // 2)
],
axis=0)
features = TSNE(n_components=2, verbose=1,
n_jobs=-1).fit_transform(
features) # [2 * length, 2]
# [2 * length, １]
if n_class > 2:
labels = np.concatenate([
test_result['all_y'],
np.array([-1] * (len(test_dataset) // 2))
], 0).reshape((-1, 1))
else:
labels = np.concatenate([
test_result['all_binary_y'],
np.array([-1] * (len(test_dataset) // 2))
], 0).reshape((-1, 1))
# [2 * length, 3]
data = np.concatenate([features, labels], 1)
fig = scatter_plot(data, processor)
fig.savefig(os.path.join(args.output_dir, 'plot.png'))
fig.show()
def train(train_dataset, dev_dataset):
train_dataloader = DataLoader(train_dataset,
batch_size=args.train_batch_size,
shuffle=True,
num_workers=2)
global best_dev
nonlocal global_step
n_sample = len(train_dataloader)
early_stopping = EarlyStopping(args.patience, logger=logger)
# Loss function
adversarial_loss = torch.nn.BCELoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss().to(device)
# Optimizers
optimizer_G = torch.optim.Adam(G.parameters(),
lr=args.G_lr) # optimizer for generator
optimizer_D_detect = torch.optim.Adam(
D_detect.parameters(),
lr=args.D_detect_lr) # optimizer for discriminator
optimizer_D_g = torch.optim.Adam(D_g.parameters(), lr=args.D_g_lr)
optimizer_E = AdamW(E.parameters(), args.bert_lr)
G_total_train_loss = []
D_total_fake_loss = []
D_total_real_loss = []
FM_total_train_loss = []
D_total_class_loss = []
valid_detection_loss = []
valid_oos_ind_precision = []
valid_oos_ind_recall = []
valid_oos_ind_f_score = []
for i in range(args.n_epoch):
logger.info('***********************************')
logger.info('epoch: {}'.format(i))
# Initialize model state
G.train()
D_detect.train()
D_g.train()
E.train()
D_g_real_loss = 0
D_g_fake_loss = 0
D_detect_real_loss = 0
D_detect_fake_loss = 0
G_loss = 0
for sample in tqdm(train_dataloader):
sample = (i.to(device) for i in sample)
token, mask, type_ids, y = sample
batch = len(token)
all_g_D_g_loss = 0
D_gen_real_loss = None
D_gen_fake_loss = None
# the label used to train generator and discriminator.
valid_label = FloatTensor(batch, 1).fill_(1.0).detach()
fake_label = FloatTensor(batch, 1).fill_(0.0).detach()
optimizer_E.zero_grad()
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
for gan_i in range(args.time):
# ------------------------- train D_g -------------------------#
# train on D_g real
id_sample = (y == 1.0)
weight = torch.ones(len(id_sample)).to(
device) - id_sample * 1.0 # 除去id损失, 只用ood数据
real_loss_func = torch.nn.BCELoss(weight=weight).to(device)
optimizer_D_g.zero_grad()
D_gen_real_discriminator_output, f_vector = D_g(
real_feature)
# D_gen_real_loss = adversarial_loss(D_gen_real_discriminator_output, valid_label) # 判别器对真实样本的损失
D_gen_real_loss = real_loss_func(
D_gen_real_discriminator_output.squeeze(),
valid_label.squeeze())
# train on D_g fake
z = FloatTensor(
np.random.normal(0, 1,
(batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
D_gen_fake_discriminator_output, f_vector = D_g(
fake_feature)
D_gen_fake_loss = adversarial_loss(
D_gen_fake_discriminator_output.squeeze(),
fake_label.squeeze()) # 判别器对假样本的损失
D_gen_loss = D_gen_real_loss + D_gen_fake_loss
D_gen_loss.backward(retain_graph=True) # 保存计算图，生成器还要使用
optimizer_D_g.step()
# ------------------------- train G -------------------------#
list_g_D_g_loss = []
for gi in range(args.g_time):
optimizer_G.zero_grad()
z = FloatTensor(
np.random.normal(0, 1,
(batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
D_gen_fake_discriminator_output, f_vector = D_g(
fake_feature)
g_D_g_loss = adversarial_loss(
D_gen_fake_discriminator_output.squeeze(),
valid_label.squeeze()) # 生成器欺骗 D_g, 认为是真实样本
g_D_g_loss.backward()
optimizer_G.step()
all_g_D_g_loss += g_D_g_loss.detach()
list_g_D_g_loss.append(g_D_g_loss)
# ------------------------- train D_detect_ood -------------------------#
# train on real(detect real sample)
optimizer_D_detect.zero_grad()
ood_real_detect_discriminator_output, f_vector = D_detect(
real_feature)
ood_real_detect_loss = adversarial_loss(
ood_real_detect_discriminator_output.squeeze(),
(y != 0.0).float()) # ood 判别器对真实样本的损失
# train on fake(detect fake sample) fake sample is fake id -> ood
z = FloatTensor(np.random.normal(
0, 1, (batch, args.G_z_dim))).to(device)
fake_feature = G(z).detach()
ood_fake_detect_discriminator_output, f_vector = D_detect(
fake_feature)
ood_fake_detect_loss = adversarial_loss(
ood_fake_detect_discriminator_output.squeeze(),
fake_label.squeeze()) # 假ood认为是ood样本
D_detect_loss = args.beta * ood_real_detect_loss + (
1 - args.beta) * ood_fake_detect_loss # 真实样本与假ood样本影响比例
D_detect_loss.backward()
optimizer_D_detect.step()
if args.fine_tune:
optimizer_E.step()
global_step += 1
D_g_real_loss += D_gen_real_loss.detach()
D_g_fake_loss += D_gen_fake_loss.detach()
D_detect_real_loss += ood_real_detect_loss.detach()
D_detect_fake_loss += ood_fake_detect_loss.detach()
G_loss += all_g_D_g_loss
logger.info('[Epoch {}] Train: D_g_real_loss: {}'.format(
i, D_g_real_loss / n_sample))
logger.info('[Epoch {}] Train: D_g_fake_loss: {}'.format(
i, D_g_fake_loss / n_sample))
logger.info('[Epoch {}] Train: D_detect_real_loss: {}'.format(
i, D_detect_real_loss / n_sample))
logger.info('[Epoch {}] Train: D_detect_fake_loss: {}'.format(
i, D_detect_fake_loss / n_sample))
logger.info('[Epoch {}] Train: G_loss: {}'.format(
i, G_loss / n_sample))
logger.info(
'---------------------------------------------------------------------------'
)
if dev_dataset:
logger.info(
'#################### eval result at step {} ####################'
.format(global_step))
eval_result = eval(dev_dataset)
valid_detection_loss.append(eval_result['detection_loss'])
valid_oos_ind_precision.append(
eval_result['oos_ind_precision'])
valid_oos_ind_recall.append(eval_result['oos_ind_recall'])
valid_oos_ind_f_score.append(eval_result['oos_ind_f_score'])
# 1 表示要保存模型
# 0 表示不需要保存模型
# -1 表示不需要模型，且超过了patience，需要early stop
signal = early_stopping(-eval_result['eer'])
if signal == -1:
break
# elif signal == 0:
# pass
# elif signal == 1:
# save_gan_model(D, G, config['gan_save_path'])
# if args.fine_tune:
# save_model(E, path=config['bert_save_path'], model_name='bert')
logger.info(eval_result)
logger.info('valid_eer: {}'.format(eval_result['eer']))
logger.info('valid_oos_ind_precision: {}'.format(
eval_result['oos_ind_precision']))
logger.info('valid_oos_ind_recall: {}'.format(
eval_result['oos_ind_recall']))
logger.info('valid_oos_ind_f_score: {}'.format(
eval_result['oos_ind_f_score']))
logger.info('valid_auc: {}'.format(eval_result['auc']))
logger.info('valid_fpr95: {}'.format(
ErrorRateAt95Recall(eval_result['all_binary_y'],
eval_result['y_score'])))
best_dev = -early_stopping.best_score
def eval(dataset):
dev_dataloader = DataLoader(dataset, batch_size=args.predict_batch_size, shuffle=False, num_workers=2)
n_sample = len(dev_dataloader)
result = dict()
# Loss function
detection_loss = torch.nn.BCELoss().to(device)
classified_loss = torch.nn.CrossEntropyLoss(ignore_index=0).to(device)
G.eval()
D.eval()
E.eval()
all_detection_preds = []
all_class_preds = []
all_features = []
for sample in tqdm.tqdm(dev_dataloader):
sample = (i.to(device) for i in sample)
if args.dataset == 'smp':
token, mask, type_ids, knowledge_tag, y = sample
if args.dataset == 'oos-eval':
token, mask, type_ids, y = sample
batch = len(token)
anchor_ood = torch.zeros(args.num_outcomes, dtype=torch.float).to(device) + torch.tensor(anchor0, dtype=torch.float).to(device)
anchor_ind = torch.zeros(args.num_outcomes, dtype=torch.float).to(device) + torch.tensor(anchor1, dtype=torch.float).to(device)
# -------------------------evaluate D------------------------- #
# BERT encode sentence to feature vector
with torch.no_grad():
sequence_output, pooled_output = E(token, mask, type_ids)
real_feature = pooled_output
# 大于2表示除了训练判别器还要训练分类器
if n_class > 2:
f_vector, discriminator_output, classification_output = D(real_feature, return_feature=True)
all_class_preds.append(classification_output)
# 只预测判别器
else:
f_vector, discriminator_output = D.detect_only(real_feature, return_feature=True)
discriminator_output = discriminator_output.log_softmax(1).exp()
if args.do_vis:
all_features.append(f_vector)
divergence_to_preidction = []
# logger.info('anchor_ood: {}'.format(anchor_ood))
# logger.info('anchor_ind: {}'.format(anchor_ind))
# logger.info('discriminator_output: {}'.format(discriminator_output))
for output in discriminator_output:
d_ood = triplet_loss(anchor_ood, output, skewness=args.positive_skew)
d_ind = triplet_loss(anchor_ind, output, skewness=args.negative_skew)
# logger.info('d_ood : d_ind = {} : {}'.format(d_ood, d_ind))
# divergence_to_preidction.append(1 if d_ind < d_ood else 0)
divergence_to_preidction.append(d_ood / (d_ind + d_ood))
all_detection_preds.extend(divergence_to_preidction)
all_y = LongTensor(dataset.dataset[:, -1].astype(int)).cpu() # [length, n_class]
all_binary_y = (all_y != 0).long() # [length, 1] label 0 is oos
# 用 realness_D 做 ood 判别
# all_detection_preds = torch.cat(all_detection_preds, 0).cpu() # [length, 1]
# all_detection_binary_preds = convert_to_int_by_threshold(all_detection_preds.squeeze()) # [length, 1]
all_detection_preds = FloatTensor(all_detection_preds).cpu()
# all_detection_binary_preds = all_detection_preds.squeeze() # [length, 1]
all_detection_binary_preds = convert_to_int_by_threshold(all_detection_preds.squeeze()) # [length, 1]
# logger.info('all_detection_preds: {}'.format(all_detection_preds))
# logger.info('all_binary_y: {}'.format(all_binary_y))
# 计算损失
detection_loss = detection_loss(all_detection_preds, all_binary_y.float())
result['detection_loss'] = detection_loss
if n_class > 2:
class_one_hot_preds = torch.cat(all_class_preds, 0).detach().cpu() # one hot label
class_loss = classified_loss(class_one_hot_preds, all_y) # compute loss
all_class_preds = torch.argmax(class_one_hot_preds, 1) # label
class_acc = metrics.ind_class_accuracy(all_class_preds, all_y, oos_index=0) # accuracy for ind class
logger.info(metrics.classification_report(all_y, all_class_preds, target_names=processor.id_to_label))
# report
oos_ind_precision, oos_ind_recall, oos_ind_fscore, _ = metrics.binary_recall_fscore(all_detection_binary_preds,all_binary_y)
detection_acc = metrics.accuracy(all_detection_binary_preds, all_binary_y)
y_score = all_detection_preds.squeeze().tolist()
eer = metrics.cal_eer(all_binary_y, all_detection_binary_preds)
result['eer'] = eer
result['all_detection_binary_preds'] = all_detection_binary_preds
result['detection_acc'] = detection_acc
result['all_binary_y'] = all_binary_y
result['oos_ind_precision'] = oos_ind_precision
result['oos_ind_recall'] = oos_ind_recall
result['oos_ind_f_score'] = oos_ind_fscore
result['y_score'] = y_score
result['auc'] = roc_auc_score(all_binary_y, y_score)
result['fpr95'] = ErrorRateAt95Recall(all_binary_y, y_score)
if n_class > 2:
result['class_loss'] = class_loss
result['class_acc'] = class_acc
if args.do_vis:
all_features = torch.cat(all_features, 0).cpu().numpy()
result['all_features'] = all_features
freeze_data['valid_all_y'] = all_y
freeze_data['vaild_all_pred'] = all_detection_binary_preds
freeze_data['valid_score'] = y_score
return result