class Trainer(object):
def __init__(self, config):
self.config = config
self.data_processor = DataProcessor("/Users/a5560648/workspace/tutor/data", max_len=config["max_len"])
self.model = BertClassifier(config=config)
def train(self):
data_loader = DataLoader(self.data_processor.get_dataset(), batch_size=config["batch_size"], shuffle=True, drop_last=True)
optimizer = torch.optim.Adam(self.model.parameters(), lr=self.config["lr"])
loss_fn = torch.nn.functional.cross_entropy
for epoch in range(self.config["epoch"]):
with tqdm(total=len(data_loader)) as pbar:
for input_ids, token_type_ids, attention_mask, labels in data_loader:
optimizer.zero_grad()
output = self.model(input_ids, token_type_ids, attention_mask)
loss = loss_fn(output, labels)
loss.backward()
optimizer.step()
pbar.update(1)
def main():
args = parse_arguments()
# argument setting
print("=== Argument Setting ===")
print("src: " + args.src)
print("tgt: " + args.tgt)
print("seed: " + str(args.seed))
print("train_seed: " + str(args.train_seed))
print("model_type: " + str(args.model))
print("max_seq_length: " + str(args.max_seq_length))
print("batch_size: " + str(args.batch_size))
print("pre_epochs: " + str(args.pre_epochs))
print("num_epochs: " + str(args.num_epochs))
print("AD weight: " + str(args.alpha))
print("KD weight: " + str(args.beta))
print("temperature: " + str(args.temperature))
set_seed(args.train_seed)
if args.model in ['roberta', 'distilroberta']:
tokenizer = RobertaTokenizer.from_pretrained('roberta-base')
else:
tokenizer = BertTokenizer.from_pretrained('bert-base-uncased')
# preprocess data
print("=== Processing datasets ===")
if args.src in ['blog', 'airline', 'imdb']:
src_x, src_y = CSV2Array(
os.path.join('data', args.src, args.src + '.csv'))
else:
src_x, src_y = XML2Array(
os.path.join('data', args.src, 'negative.review'),
os.path.join('data', args.src, 'positive.review'))
src_x, src_test_x, src_y, src_test_y = train_test_split(
src_x, src_y, test_size=0.2, stratify=src_y, random_state=args.seed)
if args.tgt in ['blog', 'airline', 'imdb']:
tgt_x, tgt_y = CSV2Array(
os.path.join('data', args.tgt, args.tgt + '.csv'))
else:
tgt_x, tgt_y = XML2Array(
os.path.join('data', args.tgt, 'negative.review'),
os.path.join('data', args.tgt, 'positive.review'))
tgt_train_x, tgt_test_y, tgt_train_y, tgt_test_y = train_test_split(
tgt_x, tgt_y, test_size=0.2, stratify=tgt_y, random_state=args.seed)
if args.model in ['roberta', 'distilroberta']:
src_features = roberta_convert_examples_to_features(
src_x, src_y, args.max_seq_length, tokenizer)
src_test_features = roberta_convert_examples_to_features(
src_test_x, src_test_y, args.max_seq_length, tokenizer)
tgt_features = roberta_convert_examples_to_features(
tgt_x, tgt_y, args.max_seq_length, tokenizer)
tgt_train_features = roberta_convert_examples_to_features(
tgt_train_x, tgt_train_y, args.max_seq_length, tokenizer)
else:
src_features = convert_examples_to_features(src_x, src_y,
args.max_seq_length,
tokenizer)
src_test_features = convert_examples_to_features(
src_test_x, src_test_y, args.max_seq_length, tokenizer)
tgt_features = convert_examples_to_features(tgt_x, tgt_y,
args.max_seq_length,
tokenizer)
tgt_train_features = convert_examples_to_features(
tgt_train_x, tgt_train_y, args.max_seq_length, tokenizer)
# load dataset
src_data_loader = get_data_loader(src_features, args.batch_size)
src_data_eval_loader = get_data_loader(src_test_features, args.batch_size)
tgt_data_train_loader = get_data_loader(tgt_train_features,
args.batch_size)
tgt_data_all_loader = get_data_loader(tgt_features, args.batch_size)
# load models
if args.model == 'bert':
src_encoder = BertEncoder()
tgt_encoder = BertEncoder()
src_classifier = BertClassifier()
elif args.model == 'distilbert':
src_encoder = DistilBertEncoder()
tgt_encoder = DistilBertEncoder()
src_classifier = BertClassifier()
elif args.model == 'roberta':
src_encoder = RobertaEncoder()
tgt_encoder = RobertaEncoder()
src_classifier = RobertaClassifier()
else:
src_encoder = DistilRobertaEncoder()
tgt_encoder = DistilRobertaEncoder()
src_classifier = RobertaClassifier()
discriminator = Discriminator()
if args.load:
src_encoder = init_model(args,
src_encoder,
restore=param.src_encoder_path)
src_classifier = init_model(args,
src_classifier,
restore=param.src_classifier_path)
tgt_encoder = init_model(args,
tgt_encoder,
restore=param.tgt_encoder_path)
discriminator = init_model(args,
discriminator,
restore=param.d_model_path)
else:
src_encoder = init_model(args, src_encoder)
src_classifier = init_model(args, src_classifier)
tgt_encoder = init_model(args, tgt_encoder)
discriminator = init_model(args, discriminator)
# train source model
print("=== Training classifier for source domain ===")
if args.pretrain:
src_encoder, src_classifier = pretrain(args, src_encoder,
src_classifier, src_data_loader)
# eval source model
print("=== Evaluating classifier for source domain ===")
evaluate(src_encoder, src_classifier, src_data_loader)
evaluate(src_encoder, src_classifier, src_data_eval_loader)
evaluate(src_encoder, src_classifier, tgt_data_all_loader)
for params in src_encoder.parameters():
params.requires_grad = False
for params in src_classifier.parameters():
params.requires_grad = False
# train target encoder by GAN
print("=== Training encoder for target domain ===")
if args.adapt:
tgt_encoder.load_state_dict(src_encoder.state_dict())
tgt_encoder = adapt(args, src_encoder, tgt_encoder, discriminator,
src_classifier, src_data_loader,
tgt_data_train_loader, tgt_data_all_loader)
# eval target encoder on lambda0.1 set of target dataset
print("=== Evaluating classifier for encoded target domain ===")
print(">>> source only <<<")
evaluate(src_encoder, src_classifier, tgt_data_all_loader)
print(">>> domain adaption <<<")
evaluate(tgt_encoder, src_classifier, tgt_data_all_loader)
# model = RNNClassifier(text_field, embedding_dim, hidden_dim, rnn_type="GRU", bidir=False,
# checkpoint_name='checkpoints/gru.pt')
# in the above line, you can change rnn_type to either RNN_TANH, GRU, or LSTM to create a different network
# you can also set bidir=True to create a bidirectional network
# model = CNNClassifier(text_field, embedding_dim, num_filters=32, filter_sizes=[1, 2, 3, 5],
# checkpoint_name='checkpoints/cnn.pt')
tokenizer = transformers.BertTokenizer.from_pretrained('bert-base-uncased',
do_lower=True)
train_iter, val_iter, test_iter, text_field, label_field = prep_torch_data(
batch_size=32, transformer_tokenize=tokenizer)
bert = transformers.BertModel.from_pretrained('bert-base-uncased')
for i in bert.parameters():
i.requires_grad = False
model = BertClassifier(bert, checkpoint_name='checkpoints/bert.pt')
optimizer = optim.Adam(model.parameters())
# move everything to gpu if available
device = ("cuda" if torch.cuda.is_available() else "cpu")
if device == "cuda":
model.cuda()
torch.set_default_tensor_type('torch.cuda.FloatTensor')
train(model,
train_iter,
val_iter,
test_iter,
optimizer,
criterion,
n_epochs=50,
short_train=True,
checkpoint_name=model.checkpoint_name,
attention_mask['train'], attention_mask['val'], attention_mask[
'test'] = attention_mask_[:nb_train], attention_mask_[
nb_train:nb_train + nb_val], attention_mask_[-nb_test:]
datasets = {}
loader = {}
for split in ['train', 'val', 'test']:
datasets[split] = Data.TensorDataset(input_ids[split],
attention_mask[split], label[split])
loader[split] = Data.DataLoader(datasets[split],
batch_size=batch_size,
shuffle=True)
# Training
optimizer = th.optim.Adam(model.parameters(), lr=bert_lr)
scheduler = lr_scheduler.MultiStepLR(optimizer, milestones=[30], gamma=0.1)
def train_step(engine, batch):
global model, optimizer
model.train()
model = model.to(gpu)
optimizer.zero_grad()
(input_ids, attention_mask, label) = [x.to(gpu) for x in batch]
optimizer.zero_grad()
y_pred = model(input_ids, attention_mask)
y_true = label.type(th.long)
loss = F.cross_entropy(y_pred, y_true)
loss.backward()
optimizer.step()
def main():
# 参数设置
batch_size = 4
device = 'cuda' if torch.cuda.is_available() else 'cpu'
epochs = 10
learning_rate = 5e-6 #Learning Rate不宜太大
# 获取到dataset
train_dataset = CNewsDataset('data/cnews/cnews.train.txt')
valid_dataset = CNewsDataset('data/cnews/cnews.val.txt')
#test_data = load_data('cnews/cnews.test.txt')
# 生成Batch
train_dataloader = DataLoader(train_dataset,
batch_size=batch_size,
shuffle=True)
valid_dataloader = DataLoader(valid_dataset,
batch_size=batch_size,
shuffle=False)
#test_dataloader = DataLoader(valid_data, batch_size=batch_size, shuffle=False)
# 读取BERT的配置文件
bert_config = BertConfig.from_pretrained('bert-base-chinese')
num_labels = len(train_dataset.labels)
# 初始化模型
model = BertClassifier(bert_config, num_labels).to(device)
optimizer = AdamW(model.parameters(), lr=learning_rate)
criterion = nn.CrossEntropyLoss()
best_acc = 0
for epoch in range(1, epochs + 1):
losses = 0 # 损失
accuracy = 0 # 准确率
model.train()
train_bar = tqdm(train_dataloader)
for input_ids, token_type_ids, attention_mask, label_id in train_bar:
model.zero_grad()
train_bar.set_description('Epoch %i train' % epoch)
output = model(
input_ids=input_ids.to(device),
attention_mask=attention_mask.to(device),
token_type_ids=token_type_ids.to(device),
)
loss = criterion(output, label_id.to(device))
losses += loss.item()
pred_labels = torch.argmax(output, dim=1) # 预测出的label
acc = torch.sum(pred_labels == label_id.to(device)).item() / len(
pred_labels) #acc
accuracy += acc
loss.backward()
optimizer.step()
train_bar.set_postfix(loss=loss.item(), acc=acc)
average_loss = losses / len(train_dataloader)
average_acc = accuracy / len(train_dataloader)
print('\tTrain ACC:', average_acc, '\tLoss:', average_loss)
# 验证
model.eval()
losses = 0 # 损失
accuracy = 0 # 准确率
valid_bar = tqdm(valid_dataloader)
for input_ids, token_type_ids, attention_mask, label_id in valid_bar:
valid_bar.set_description('Epoch %i valid' % epoch)
output = model(
input_ids=input_ids.to(device),
attention_mask=attention_mask.to(device),
token_type_ids=token_type_ids.to(device),
)
loss = criterion(output, label_id.to(device))
losses += loss.item()
pred_labels = torch.argmax(output, dim=1) # 预测出的label
acc = torch.sum(pred_labels == label_id.to(device)).item() / len(
pred_labels) #acc
accuracy += acc
valid_bar.set_postfix(loss=loss.item(), acc=acc)
average_loss = losses / len(valid_dataloader)
average_acc = accuracy / len(valid_dataloader)
print('\tValid ACC:', average_acc, '\tLoss:', average_loss)
if average_acc > best_acc:
best_acc = average_acc
torch.save(model.state_dict(), 'models/best_model.pkl')
train_dataset = EmojiDataset('../../data/train_bert_sentences.npy',
'../../data/train_bert_labels.npy')
train_dataloader = DataLoader(train_dataset,
batch_size=64,
shuffle=False,
collate_fn=collate_fn)
test_dataset = EmojiDataset('../../data/test_bert_sentences.npy',
'../../data/test_bert_labels.npy')
test_dataloader = DataLoader(test_dataset,
batch_size=128,
shuffle=False,
collate_fn=collate_fn)
optimizer = AdamW(model.parameters(), lr=2e-5, correct_bias=False)
# optimizer = nn.DataParallel(optimizer)
total_steps = len(train_dataloader) * epochs
# scheduler = get_linear_schedule_with_warmup(
# optimizer,
# num_warmup_steps = 0,
# num_training_steps = total_steps
# )
scheduler = get_constant_schedule_with_warmup(
optimizer,
num_warmup_steps=1000,
)
for epoch in range(epochs):
def main(paras):
logger = logging.getLogger(__name__)
if paras.save_log_file:
logging.basicConfig(format='%(asctime)s - %(levelname)s - %(name)s - %(message)s',
datefmt='%m/%d/%Y %H:%M:%S',
level=paras.logging_level,
filename=f'{paras.log_save_path}/{paras.train_log_file}',
filemode='w')
else:
logging.basicConfig(format='%(asctime)s - %(levelname)s - %(name)s - %(message)s',
datefmt='%m/%d/%Y %H:%M:%S',
level=paras.logging_level, )
device = 'cuda' if torch.cuda.is_available() else 'cpu'
logger.info(f'Loading model: {paras.model_name}')
tokenizer = BertTokenizer.from_pretrained(paras.model_name)
bert = BertModel.from_pretrained(paras.model_name)
train_dataset = RE_Dataset(paras, 'train')
train_dataloaer = DataLoader(train_dataset, batch_size=paras.batch_size,
shuffle=paras.shuffle, drop_last=paras.drop_last)
label_to_index = train_dataset.label_to_index
special_token_list = list(train_dataset.special_token_set)
# fixme: add special token to tokenizer
special_tokens_dict = {'additional_special_tokens': special_token_list}
tokenizer.add_special_tokens(special_tokens_dict)
# bert.resize_token_embeddings(len(tokenizer))
test_dataset = RE_Dataset(paras, 'test')
test_dataloader = DataLoader(test_dataset, batch_size=paras.batch_size,
shuffle=paras.shuffle, drop_last=paras.drop_last)
bert_classifier = BertClassifier(bert, paras.hidden_size, paras.label_number,
paras.dropout_prob)
if paras.optimizer == 'adam':
logger.info('Loading Adam optimizer.')
optimizer = torch.optim.Adam(bert_classifier.parameters(), lr=paras.learning_rate)
elif paras.optimizer == 'adamw':
logger.info('Loading AdamW optimizer.')
no_decay = [ 'bias', 'LayerNorm.weight' ]
optimizer_grouped_parameters = [
{'params': [ p for n, p in bert_classifier.named_parameters() if not any(nd in n for nd in no_decay) ],
'weight_decay': 0.01},
{'params': [ p for n, p in bert_classifier.named_parameters() if any(nd in n for nd in no_decay) ],
'weight_decay': 0.0}
]
optimizer = AdamW(optimizer_grouped_parameters, lr=paras.learning_rate,
eps=args.adam_epsilon)
else:
logger.warning(f'optimizer must be "Adam" or "AdamW", but got {paras.optimizer}.')
logger.info('Loading Adam optimizer.')
optimizer = torch.optim.Adam(bert_classifier.parameters(),
lr=paras.learning_rate)
logger.info('Training Start.')
best_eval = {'acc': 0, 'precision': 0, 'recall': 0, 'f1': 0, 'loss': 0}
for epoch in range(paras.num_train_epochs):
epoch_loss = 0
bert_classifier.train()
for step, batch in enumerate(train_dataloaer):
optimizer.zero_grad()
batch_data, batch_label = batch
encoded_data = tokenizer(batch_data,
padding=True,
truncation=True,
return_tensors='pt',
max_length=paras.max_sequence_length)
label_tensor = batch_label_to_idx(batch_label, label_to_index)
loss = bert_classifier(encoded_data, label_tensor)
epoch_loss += loss_to_int(loss)
logging.info(f'epoch: {epoch}, step: {step}, loss: {loss:.4f}')
# fixme: del
# acc, precision, recall, f1 = evaluation(bert_classifier, tokenizer, test_dataloader,
# paras.max_sequence_length, label_to_index)
# logger.info(f'Accuracy: {acc:.4f}, Precision: {precision:.4f}, '
# f'Recall: {recall:.4f}, F1-score: {f1:.4f}')
loss.backward()
optimizer.step()
epoch_loss = epoch_loss / len(train_dataloaer)
acc, precision, recall, f1 = evaluation(bert_classifier, tokenizer, test_dataloader,
paras.max_sequence_length, label_to_index)
logging.info(f'Epoch: {epoch}, Epoch-Average Loss: {epoch_loss:.4f}')
logger.info(f'Accuracy: {acc:.4f}, Precision: {precision:.4f}, '
f'Recall: {recall:.4f}, F1-score: {f1:.4f}')
if best_eval['loss'] == 0 or f1 > best_eval['f1']:
best_eval['loss'] = epoch_loss
best_eval['acc'] = acc
best_eval['precision'] = precision
best_eval['recall'] = recall
best_eval['f1'] = f1
torch.save(bert_classifier, f'{paras.log_save_path}/{paras.model_save_name}')
with open(f'{paras.log_save_path}/{paras.checkpoint_file}', 'w') as wf:
wf.write(f'Save time: {time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())}\n')
wf.write(f'Best F1-score: {best_eval["f1"]:.4f}\n')
wf.write(f'Precision: {best_eval["precision"]:.4f}\n')
wf.write(f'Recall: {best_eval["recall"]:.4f}\n')
wf.write(f'Accuracy: {best_eval["acc"]:.4f}\n')
wf.write(f'Epoch-Average Loss: {best_eval["loss"]:.4f}\n')
logger.info(f'Updated model, best F1-score: {best_eval["f1"]:.4f}\n')
logger.info(f'Train complete, Best F1-score: {best_eval["f1"]:.4f}.')
def train(dataloader,
head_trans,
body_trans,
classifier,
load_model=False,
save_model=True,
num_epochs=2):
torch.backends.cudnn.benchmark = True
# device = 'cuda' if torch.cuda.is_available() else 'cpu'
device = 'cpu'
print(device)
load_model = load_model
save_model = save_model
learning_rate = 3e-3
num_epochs = num_epochs
# For tensorboard
writer = SummaryWriter('runs/bert')
step = 0
# Initialize Model
model = BertClassifier(head_trans, body_trans, classifier).to(device)
criterion = nn.CrossEntropyLoss()
optimizer = optim.Adam(model.parameters(), lr=learning_rate)
if load_model:
model, optimizer, step = load_checkpoint(
torch.load('bert_chkpnt/my_checkpoint.pth.tar'), model, optimizer)
return model
for epoch in range(num_epochs):
if save_model:
checkpoint = {
'state_dict': model.state_dict(),
'optimizer': optimizer.state_dict(),
'step': step
}
save_checkpoint(checkpoint)
loop = tqdm(enumerate(dataloader), total=len(dataloader), leave=False)
for batch, (head, body, stance) in loop:
outputs = model(head.to(device), body.to(device))
breakpoint()
loss = criterion(outputs.float(), stance.to(device).long())
writer.add_scalar('Training Loss', loss.item(), step)
step += 1
optimizer.zero_grad()
loss.backward()
optimizer.step()
# Update progress bar
loop.set_description(f'Epoch [{epoch+1}/{num_epochs}]')
loop.set_postfix(loss=loss.item())
running_loss += loss.item()
running_accuracy += (
(torch.argmax(outputs, dim=1)
== stance.to(device)).sum().item()) / BATCH_SIZE
if (batch + 1) % 10 == 0:
writer.add_scalar('Running Loss', running_loss / 10,
epoch * len(dataloader) + batch)
writer.add_scalar('Running Accuracy', running_accuracy / 10,
epoch * len(dataloader) + batch)
running_loss = 0.0
running_accuracy = 0
return model
def main():
device = torch.device('cuda:3')
# 获取到dataset
print('加载训练数据')
train_data = load_data('dataset/train.csv')
print('加载验证数据')
valid_data = load_data('dataset/test.csv')
# test_data = load_data('cnews/cnews.test.txt')
batch_size = 16
# 生成Batch
print('生成batch')
train_dataloader = DataLoader(train_data,
batch_size=batch_size,
shuffle=True,
num_workers=3)
valid_dataloader = DataLoader(valid_data,
batch_size=batch_size,
shuffle=False,
num_workers=3)
# test_dataloader = DataLoader(valid_data, batch_size=batch_size, shuffle=False)
# 读取BERT的配置文件
bert_config = BertConfig.from_pretrained('./chinese_wwm_pytorch')
bert_config.num_labels = num_labels
print(bert_config)
# 初始化模型
model = BertClassifier(bert_config)
# model.to(device)
# 参数设置
EPOCHS = 20
learning_rate = 5e-6 # Learning Rate不宜太大
optimizer = AdamW(model.parameters(), lr=learning_rate)
# 损失函数采用交叉熵
criterion = nn.CrossEntropyLoss()
with open('output.txt', 'w') as wf:
wf.write('Batch Size: ' + str(batch_size) + '\tLearning Rate: ' +
str(learning_rate) + '\n')
best_acc = 0
# 设置并行训练,模型默认是把参数放在device[0]对应的gpu编号的gpu上，所以这里应该和上面设置的cuda:2对应
net = torch.nn.DataParallel(model, device_ids=[3, 4])
net.to(device)
# model.module.avgpool = nn.AdaptiveAvgPool2d(7)
# 开始训练
for Epoch in range(1, EPOCHS + 1):
losses = 0 # 损失
accuracy = 0 # 准确率
print('Epoch:', Epoch)
model.train()
for batch_index, batch in enumerate(train_dataloader):
# print(batch_index)
# print(batch)
input_ids = batch[0].to(device)
attention_mask = batch[1].to(device)
token_type_ids = batch[2].to(device)
label_ids = batch[3].to(device)
# 将三个输入喂到模型中
output = net( # forward
input_ids=input_ids,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
)
loss = criterion(output, label_ids)
losses += loss.item()
pred_labels = torch.argmax(output, dim=1) # 预测出的label
acc = torch.sum(pred_labels == label_ids.to(device)).item() / len(
pred_labels) # acc
accuracy += acc
# 打印训练过程中的准确率以及loss
# print('Epoch: %d ｜ Train: | Batch: %d / %d | Acc: %f | Loss: %f' % (Epoch, batch_index + 1, len(train_dataloader), acc, loss.item()))
# 模型梯度置零，损失函数反向传播，优化更新
model.zero_grad()
loss.backward()
optimizer.step()
# torch.cuda.empty_cache()
average_loss = losses / len(train_dataloader)
average_acc = accuracy / len(train_dataloader)
# 打印该epoch训练结果的
print('\tTrain ACC:', average_acc, '\tLoss:', average_loss)
# with open('output.txt', 'a') as rf:
# output_to_file = '\nEpoch: ' + str(Epoch) + '\tTrain ACC:' + str(average_acc) + '\tLoss: ' + str(
# average_loss)
# rf.write(output_to_file)
# 验证
model.eval()
losses = 0 # 损失
accuracy = 0 # 准确率
# 在验证集上进行验证
for batch_index, batch in enumerate(valid_dataloader):
input_ids = batch[0].to(device)
attention_mask = batch[1].to(device)
token_type_ids = batch[2].to(device)
label_ids = batch[3].to(device)
with torch.no_grad():
output = model( # forward
input_ids=input_ids,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
)
loss = criterion(output, label_ids)
losses += loss.item()
# 这里的两部操作都是直接对生成的结果张量进行操作
pred_labels = torch.argmax(output, dim=1) # 预测出的label
acc = torch.sum(pred_labels == label_ids.to(device)).item() / len(
pred_labels) # acc
accuracy += acc
average_loss = losses / len(valid_dataloader)
average_acc = accuracy / len(valid_dataloader)
print('\tValid ACC:', average_acc, '\tLoss:', average_loss)
# with open('output.txt', 'a') as rf:
# output_to_file = '\nEpoch: ' + str(Epoch) + '\tValid ACC:' + str(average_acc) + '\tLoss: ' + str(
# average_loss) + '\n'
# rf.write(output_to_file)
if average_acc > best_acc:
best_acc = average_acc
torch.save(model.state_dict(), 'best_model_on_trainset.pkl')
def main(args, f):
# args = parse_arguments()
set_seed(args.train_seed)
if args.model in ['roberta', 'distilroberta']:
tokenizer = RobertaTokenizer.from_pretrained('roberta-base')
else:
tokenizer = BertTokenizer.from_pretrained('bert-base-uncased')
# preprocess data
src_eval_loader, src_loader, tgt_all_loader, tgt_train_loader = get_all_dataloader(
args, tokenizer)
# load models
if args.model == 'bert':
src_encoder = BertEncoder()
tgt_encoder = BertEncoder()
src_classifier = BertClassifier()
elif args.model == 'distilbert':
src_encoder = DistilBertEncoder()
tgt_encoder = DistilBertEncoder()
src_classifier = BertClassifier()
elif args.model == 'roberta':
src_encoder = RobertaEncoder()
tgt_encoder = RobertaEncoder()
src_classifier = RobertaClassifier()
else:
src_encoder = DistilRobertaEncoder()
tgt_encoder = DistilRobertaEncoder()
src_classifier = RobertaClassifier()
discriminator = Discriminator()
# parallel models
if torch.cuda.device_count() > 1:
print('Let\'s use {} GPUs!'.format(torch.cuda.device_count()))
src_encoder = nn.DataParallel(src_encoder)
src_classifier = nn.DataParallel(src_classifier)
tgt_encoder = nn.DataParallel(tgt_encoder)
discriminator = nn.DataParallel(discriminator)
if args.load:
src_encoder = init_model(args,
src_encoder,
restore_path=param.src_encoder_path)
src_classifier = init_model(args,
src_classifier,
restore_path=param.src_classifier_path)
# tgt_encoder = init_model(args, tgt_encoder, restore_path=param.tgt_encoder_path)
# discriminator = init_model(args, discriminator, restore_path=param.d_model_path)
else:
src_encoder = init_model(args, src_encoder)
src_classifier = init_model(args, src_classifier)
tgt_encoder = init_model(args, tgt_encoder)
discriminator = init_model(args, discriminator)
# train source model
if args.pretrain:
print("=== Training classifier for source domain ===")
src_encoder, src_classifier = pretrain(args, src_encoder,
src_classifier, src_loader)
# save pretrained model
save_model(args, src_encoder, param.src_encoder_path)
save_model(args, src_classifier, param.src_classifier_path)
# eval source model
print("=== Evaluating classifier for source domain ===")
evaluate(args, src_encoder, src_classifier, src_loader)
src_acc = evaluate(args, src_encoder, src_classifier, tgt_all_loader)
f.write(f'{args.src} -> {args.tgt}: No adapt acc on src data: {src_acc}\n')
for params in src_encoder.parameters():
params.requires_grad = False
for params in src_classifier.parameters():
params.requires_grad = False
# adapt
print("=== Adapt tgt encoder ===")
tgt_encoder.load_state_dict(src_encoder.state_dict())
if args.src_free:
s_res_features = src_gmm(args, src_encoder, src_loader)
src_loader = s_numpy_dataloader(s_res_features, args.batch_size)
tgt_encoder = aad_adapt_src_free(args, src_encoder, tgt_encoder,
discriminator, src_classifier,
src_loader, tgt_train_loader,
tgt_all_loader)
else:
tgt_encoder = aad_adapt(args, src_encoder, tgt_encoder, discriminator,
src_classifier, src_loader, tgt_train_loader,
tgt_all_loader)
# save_model(args, tgt_encoder, param.tgt_encoder_path)
# argument setting
# print("=== Argument Setting ===")
print(
f"model_type: {args.model}; max_seq_len: {args.max_seq_length}; batch_size: {args.batch_size}; "
f"pre_epochs: {args.pre_epochs}; num_epochs: {args.num_epochs}; adv weight: {args.alpha}; "
f"KD weight: {args.beta}; temperature: {args.temperature}; src: {args.src}; tgt: {args.tgt}; "
f'src_free: {args.src_free}; dp: {args.dp}; ent: {args.ent}')
# eval target encoder on lambda0.1 set of target dataset
print("=== Evaluating classifier for encoded target domain ===")
print(">>> domain adaption <<<")
tgt_acc = evaluate(args, tgt_encoder, src_classifier, tgt_all_loader)
f.write(f'{args.src} -> {args.tgt}: DA acc on tgt data: {tgt_acc}\n')
f.write(
f"model_type: {args.model}; batch_size: {args.batch_size}; pre_epochs: {args.pre_epochs}; "
f"num_epochs: {args.num_epochs}; src_free: {args.src_free}; src: {args.src}; "
f"tgt: {args.tgt}; dp: {args.dp}; ent: {args.ent}\n\n")
