def get_grad(self, batch, attack_Ins):
"""
:param batch: a batch of things including a tensor of word vector indices (B, len)
:param attack_Ins: if attack the Ins transformation, if True, we will return other two grads instead (x_iou, c)
:return: if attack_Ins is False, return np array with shape (len, word_vec_size),
Otherwise, return np arrays with shape (len, h_size * 3), (len, h_size)
"""
self.adv_attack = True
if attack_Ins:
self.adv_attack_Ins = True
g = batch['trees']
n = g.number_of_nodes()
h = th.zeros((n, self.h_size)).to(self.device)
c = th.zeros((n, self.h_size)).to(self.device)
logits = self.forward(batch, g, h, c, compute_bounds=False)
loss = CrossEntropyLoss()(logits, batch['y']).sum()
loss.backward()
self.adv_attack = False
if attack_Ins:
self.adv_attack_Ins = False
return self.out_ioux_c[0].grad[0].cpu().numpy(), self.out_ioux_c[1].grad[0].cpu().numpy()
return self.out_x_vecs.grad[0].cpu().numpy()
def train(self, epochs, pretrain_file=None):
logging.info(
"%s INFO: Begin training",
time.strftime("%m/%d/%Y %I:%M:%S %p", time.localtime()),
)
iter_ = 0
start_epoch, accu, iou, f1, train_loss, test_loss, losses = self._load_init(
pretrain_file
)
loss_weights = torch.ones(
self.cfg.N_CLASSES, dtype=torch.float32, device=self.device
)
if self.cfg.WEIGHTED_LOSS or self.cfg.REVOLVER_WEIGHTED:
weights = self.gt_dataset.compute_frequency()
if self.cfg.REVOLVER_WEIGHTED:
self.train_dataset.set_sparsifier_weights(weights)
if self.cfg.WEIGHTED_LOSS:
loss_weights = (
torch.from_numpy(weights).type(torch.FloatTensor).to(self.device)
)
train_loader = self.train_dataset.get_loader(
self.cfg.BATCH_SIZE, self.cfg.WORKERS
)
for e in tqdm(range(start_epoch, epochs + 1), total=epochs + 1 - start_epoch):
logging.info(
"\n%s Epoch %s",
time.strftime("%m/%d/%Y %I:%M:%S %p", time.localtime()),
e,
)
self.net.train()
steps_pbar = tqdm(
train_loader, total=self.cfg.EPOCH_SIZE // self.cfg.BATCH_SIZE
)
for data in steps_pbar:
features, labels = data
self.optimizer.zero_grad()
features = features.float().to(self.device)
labels = labels.float().to(self.device)
output = self.net(features)
loss = CrossEntropyLoss(loss_weights)(output, labels.long())
loss.backward()
self.optimizer.step()
losses.append(loss.item())
iter_ += 1
steps_pbar.set_postfix({"loss": loss.item()})
train_loss.append(np.mean(losses[-1 * self.cfg.EPOCH_SIZE :]))
loss, iou_, acc_, f1_ = self.test()
test_loss.append(loss)
accu.append(acc_)
iou.append(iou_ * 100)
f1.append(f1_ * 100)
del (loss, iou_, acc_)
if e % 5 == 0:
self._save_net(e, accu, iou, f1, train_loss, test_loss, losses)
self.scheduler.step()
# Save final state
self._save_net(epochs, accu, iou, f1, train_loss, test_loss, losses, False)
def train(model, optimizer, dataset, args):
model = model.to(device)
optimizer = opt(optimizer, model, args)
# scheduler = get_cosine_schedule_with_warmup(optimizer, num_warmup_steps=args.warmup_steps, num_training_steps=args.training_steps)
model.train()
loss_hist = []
acc_hist = []
accuracy = 0
print("Begin Training...")
for epoch in range(args.epochs):
print(f"Epoch {epoch}")
ctime = time.time()
for data_e, (inp, tar) in enumerate(dataset):
tar = tar.to(device)
input_ids, token_type_ids, attention_mask = inp["input_ids"].to(device), \
inp["token_type_ids"].to(device), \
inp["attention_mask"].to(device)
output = model(input_ids=input_ids,
token_type_ids=token_type_ids,
attention_mask=attention_mask,
cls_pos=args.cls_pos)
loss = CrossEntropyLoss()(output, tar)
loss = loss / args.gradient_accumulation_steps
loss.backward()
accuracy += (tar == output.argmax(1)).type(torch.float).mean() / args.gradient_accumulation_steps
if not data_e % args.gradient_accumulation_steps:
loss_hist.append(loss.item())
optimizer.step()
# scheduler.step()
optimizer.zero_grad()
acc_hist.append(accuracy)
accuracy = 0
if not data_e % 2000:
print(f"Batch {data_e} Loss : {loss.item()}")
print(f"Ground Truth: {tar.tolist()} \t Predicted: {output.argmax(1).tolist()}")
print(
f"Time taken for epoch{epoch+1} : {round( (time.time() - ctime) / 60, 2 )} MINUTES"
)
torch.save(model, args.pretrainedPATH + f"saved_checkpoint_{args.save_checkpoint}.pt")
# model.save_pretrained(
# args.pretrainedPATH + f"saved_checkpoint_{args.save_checkpoint}"
# )
print(
f"Model saved at {args.pretrainedPATH}saved_checkpoint_{args.save_checkpoint}"
)
args.save_checkpoint += 1
return loss_hist, acc_hist
def train(model, device, train_loader, optimizer, epoch, log_interval=1):
model.to(device)
model.train()
for batch_idx, (data, target) in enumerate(train_loader):
print(data.shape)
data, target = data.to(device), target.to(device)
optimizer.zero_grad()
output = model(data)
print(target)
loss = CrossEntropyLoss(output, target)
loss.backward()
optimizer.step()
if batch_idx % log_interval == 0:
print('Train Epoch: {} [{}/{} ({:.0f}%)]\tLoss: {:.6f}'.format(
epoch, batch_idx * len(data), len(train_loader.dataset),
100. * batch_idx / len(train_loader), loss.item()))
def train(model, device, loader, optimiser):
num_batches = len(loader) / BATCH_SIZE
total_loss = 0.0
y_true = []
y_pred = []
for step, batch in enumerate(loader):
batch = batch.to(device)
# TRAIN
model.train()
out = model(batch)
optimiser.zero_grad()
loss = CrossEntropyLoss()(out, batch.y)
total_loss += loss
loss.backward()
optimiser.step()
# EVAL
model.eval()
with torch.no_grad():
pred = model(batch).argmax(dim=-1)
y_true.append(batch.y.detach().cpu())
y_pred.append(pred.detach().cpu())
y_true = torch.cat(y_true, dim=0).numpy()
y_pred = torch.cat(y_pred, dim=0).numpy()
avg_loss = total_loss / num_batches
acc = f1_score(y_true=y_true, y_pred=y_pred, average='micro')
return avg_loss.item(), acc
def do_training(train_fs, train_exs):
"""Runs BERT fine-tuning."""
# Allows to write to enclosed variables global_step
nonlocal global_step
# Create the batched training data out of the features.
train_data = create_tensor_dataset(train_fs)
train_sampler = RandomSampler(train_data)
train_dataloader = DataLoader(train_data, sampler=train_sampler, batch_size=args.train_batch_size)
# Calculate the number of optimization steps.
num_train_optimization_steps = len(train_dataloader) // args.gradient_accumulation_steps * args.num_train_epochs
# Prepare optimizer.
param_optimizer = list(model.named_parameters())
no_decay = ['bias', 'LayerNorm.bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [
{'params': [p for n, p in param_optimizer if not any(nd in n for nd in no_decay)], 'weight_decay': 0.01},
{'params': [p for n, p in param_optimizer if any(nd in n for nd in no_decay)], 'weight_decay': 0.0}
]
optimizer = BertAdam(optimizer_grouped_parameters,
lr=args.learning_rate,
warmup=args.warmup_proportion,
t_total=num_train_optimization_steps)
# Log some information about the training.
logger.info("***** Running training *****")
logger.info(" Num examples = %d", len(train_exs))
logger.info(" Batch size = %d", args.train_batch_size)
logger.info(" Num steps = %d", num_train_optimization_steps)
# Set the model to training mode and train for X epochs.
model.train()
for _ in trange(int(args.num_train_epochs), desc="Epoch"):
tr_loss = 0
nb_tr_examples, nb_tr_steps = 0, 0
# Iterate over all batches.
for step, batch in enumerate(tqdm(train_dataloader, desc="Iteration")):
batch = tuple(t.to(device) for t in batch)
input_ids, input_mask, segment_ids, label_ids = batch
# Get the Logits and calculate the loss.
logits = model(input_ids, token_type_ids=segment_ids, attention_mask=input_mask)
loss = CrossEntropyLoss()(logits.view(-1, num_labels), label_ids.view(-1))
# Scale the loss in gradient accumulation mode.
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
# Calculate the gradients.
loss.backward()
tr_loss += loss.item()
nb_tr_examples += input_ids.size(0)
nb_tr_steps += 1
# Update the weights every gradient_accumulation_steps steps.
if (step + 1) % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
global_step += 1
tb_writer.add_scalar('lr', optimizer.get_lr()[0], global_step)
tb_writer.add_scalar('loss', loss.item(), global_step)
def distill(args,
output_model_file,
processor,
label_list,
tokenizer,
device,
n_gpu,
tensorboard_logger,
eval_data=None):
assert args.kd_policy is not None
model = args.kd_policy.student
args.kd_policy.teacher.eval()
num_labels = len(args.labels)
global_step = 0
nb_tr_steps = 0
tr_loss = 0
save_best_model = eval_data is not None and args.eval_interval > 0
train_examples = processor.get_train_examples(args.data_dir)
num_train_steps = int(
len(train_examples) / args.train_batch_size / args.gradient_accumulation_steps * args.num_train_epochs)
optimizer, t_total = get_optimizer(args, model, num_train_steps)
train_data = prepare(args, processor, label_list, tokenizer, 'train')
logger.info("***** Running distillation *****")
logger.info(" Num examples = %d", len(train_examples))
logger.info(" Batch size = %d", args.train_batch_size)
logger.info(" Num steps = %d", num_train_steps)
if args.local_rank == -1:
train_sampler = RandomSampler(train_data)
else:
train_sampler = DistributedSampler(train_data)
train_dataloader = DataLoader(train_data, sampler=train_sampler, batch_size=args.train_batch_size)
train_steps = 0
best_eval_accuracy = 0
for epoch in trange(int(args.num_train_epochs), desc="Epoch", dynamic_ncols=True):
tr_loss = 0
nb_tr_examples, nb_tr_steps = 0, 0
args.kd_policy.on_epoch_begin(model, None, None)
for step, batch in enumerate(tqdm(train_dataloader, desc="Iteration", dynamic_ncols=True)):
batch = tuple(t.to(device) for t in batch)
input_ids, input_mask, segment_ids, label_ids = batch
model.train()
logits = args.kd_policy.forward(input_ids, segment_ids, input_mask)
loss = CrossEntropyLoss()(logits.view(-1, num_labels), label_ids.view(-1))
loss = args.kd_policy.before_backward_pass(model, epoch, None, None, loss, None).overall_loss
if n_gpu > 1:
loss = loss.mean() # mean() to average on multi-gpu.
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
if args.fp16:
optimizer.backward(loss)
else:
loss.backward()
train_steps += 1
tensorboard_logger.add_scalar('distillation_train_loss', loss.item(), train_steps)
tr_loss += loss.item()
nb_tr_examples += input_ids.size(0)
nb_tr_steps += 1
if (step + 1) % args.gradient_accumulation_steps == 0:
# modify learning rate with special warm up BERT uses
lr_this_step = args.learning_rate * warmup_linear(global_step / t_total, args.warmup_proportion)
for param_group in optimizer.param_groups:
param_group['lr'] = lr_this_step
optimizer.step()
optimizer.zero_grad()
global_step += 1
if save_best_model and train_steps % args.eval_interval == 0:
eval_loss, eval_accuracy, _ = eval(args, model, eval_data, device, verbose=False)
tensorboard_logger.add_scalar('distillation_dev_loss', eval_loss, train_steps)
tensorboard_logger.add_scalar('distillation_dev_accuracy', eval_accuracy, train_steps)
if eval_accuracy > best_eval_accuracy:
save_model(model, output_model_file)
best_eval_accuracy = eval_accuracy
args.kd_policy.on_epoch_end(model, None, None)
if save_best_model:
eval_loss, eval_accuracy, _ = eval(args, model, eval_data, device, verbose=False)
if eval_accuracy > best_eval_accuracy:
save_model(model, output_model_file)
else:
save_model(model, output_model_file)
return global_step, tr_loss / nb_tr_steps
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--data_dir",
default=None,
type=str,
required=True,
help="输入数据dir。应该包含任务的.tsv文件(或其他数据文件)。")
parser.add_argument(
"--bert_model",
default=None,
type=str,
required=True,
help=
"Bert pre-trained model selected in the list: bert-base-uncased, bert-large-uncased, bert-base-cased, bert-large-cased, bert-base-multilingual-uncased, bert-base-multilingual-cased, bert-base-chinese."
)
parser.add_argument("--task_name",
default=None,
type=str,
required=True,
help="训练任务的名称")
parser.add_argument("--output_dir",
default=None,
type=str,
required=True,
help="将写入模型预测和checkpoints的输出目录。 ")
parser.add_argument("--cache_dir",
default="",
type=str,
help="您希望将从s3下载的预训练模型存储在何处")
parser.add_argument(
"--max_seq_length",
default=128,
type=int,
help="WordPiece tokenization 后输入序列的最大总长度，大于这个的序列将被截断，小于的padded")
parser.add_argument("--do_train",
action='store_true',
help="Whether to run training.")
parser.add_argument("--do_eval",
action='store_true',
help="Whether to run eval on the dev set.")
parser.add_argument("--do_lower_case",
action='store_true',
help="如果您使用的是uncased模型，请设置此标志。")
parser.add_argument("--train_batch_size",
default=64,
type=int,
help="Total batch size for training.")
parser.add_argument("--eval_batch_size",
default=256,
type=int,
help="Total batch size for eval.")
parser.add_argument("--learning_rate",
default=5e-5,
type=float,
help="The initial learning rate for Adam.")
parser.add_argument("--num_train_epochs",
default=3.0,
type=float,
help="Total number of training epochs to perform.")
# ？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？
parser.add_argument(
"--warmup_proportion",
default=0.1,
type=float,
help=
"Proportion of training to perform linear learning rate warmup for. E.g., 0.1 = 10%% of training."
)
parser.add_argument("--no_cuda",
action='store_true',
help="Whether not to use CUDA when available")
parser.add_argument("--local_rank",
type=int,
default=-1,
help="local_rank for distributed training on gpus")
parser.add_argument('--seed',
type=int,
default=42,
help="random seed for initialization")
parser.add_argument(
'--gradient_accumulation_steps',
type=int,
default=1,
help=
"Number of updates steps to accumulate before performing a backward/update pass."
)
parser.add_argument(
'--fp16',
action='store_true',
help="Whether to use 16-bit float precision instead of 32-bit")
parser.add_argument(
'--loss_scale',
type=float,
default=0,
help=
"Loss scaling to improve fp16 numeric stability. Only used when fp16 set to True.0 (default value): dynamic loss scaling.Positive power of 2: static loss scaling value.\n"
)
parser.add_argument('--server_ip',
type=str,
default='',
help="Can be used for distant debugging.")
parser.add_argument('--server_port',
type=str,
default='',
help="Can be used for distant debugging.")
args = parser.parse_args()
# if args.server_ip and args.server_port:
# # Distant debugging - see https://code.visualstudio.com/docs/python/debugging#_attach-to-a-local-script
# import ptvsd
# print("Waiting for debugger attach")
# ptvsd.enable_attach(address=(args.server_ip, args.server_port), redirect_output=True)
# ptvsd.wait_for_attach()
processors = {
# "cola": ColaProcessor,
# "mnli": MnliProcessor,
# "mnli-mm": MnliMismatchedProcessor,
# "mrpc": MrpcProcessor,
# "sst-2": Sst2Processor,
# "sts-b": StsbProcessor,
# "qqp": QqpProcessor,
# "qnli": QnliProcessor,
"rte": RteProcessor
# "wnli": WnliProcessor,
}
output_modes = {
# "cola": "classification",
# "mnli": "classification",
# "mrpc": "classification",
# "sst-2": "classification",
# "sts-b": "regression",
# "qqp": "classification",
# "qnli": "classification",
"rte": "classification"
# "wnli": "classification",
}
if args.local_rank == -1 or args.no_cuda: # 未指定GPU，或无GPU
device = torch.device("cuda" if torch.cuda.is_available()
and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
else: # 分布式
torch.cuda.set_device(args.local_rank)
device = torch.device("cuda", args.local_rank)
n_gpu = 1 # ？？？？？？？？？？多GPU？？？？？？？
# Initializes the distributed backend which will take care of sychronizing nodes/GPUs # ？？？？？单GPU没有分布式？？？？？？
torch.distributed.init_process_group(backend='nccl')
logger.info(
"device: {} n_gpu: {}, distributed training: {}, 16-bits training: {}".
format(device, n_gpu, bool(args.local_rank != -1), args.fp16))
if args.gradient_accumulation_steps < 1:
raise ValueError(
"Invalid gradient_accumulation_steps parameter: {}, should be >= 1"
.format(args.gradient_accumulation_steps))
# 如果显存不足，假设原来的batch size=10,数据总量为1000，那么一共需要100train steps，同时一共进行100次梯度更新。
# 若是显存不够，我们需要减小batch size，我们设置gradient_accumulation_steps=2，那么我们新的batch_size=10/2=5，
# 我们需要运行两次，才能在内存中放入10条数据，梯度更新的次数不变为100次，那么我们的train_steps=200
args.train_batch_size = args.train_batch_size // args.gradient_accumulation_steps
random.seed(args.seed)
np.random.seed(args.seed)
torch.manual_seed(args.seed)
if n_gpu > 0: # 多GPU
torch.cuda.manual_seed_all(args.seed)
if not args.do_train and not args.do_eval:
raise ValueError(
"At least one of `do_train` or `do_eval` must be True.")
task_name = args.task_name.lower()
if task_name not in processors:
raise ValueError("Task not found: %s" % (task_name))
processor = processors[task_name]() # RteProcessor
output_mode = output_modes[task_name] # "classification"
label_list = processor.get_labels() # ["entailment", "not_entailment"]
num_labels = len(label_list)
# Prepare model
cache_dir = args.cache_dir if args.cache_dir else os.path.join(
str(PYTORCH_TRANSFORMERS_CACHE), 'distributed_{}'.format(
args.local_rank))
# model = BertForSequenceClassification.from_pretrained(args.bert_model,
# cache_dir=cache_dir,
# num_labels=num_labels)
# tokenizer = BertTokenizer.from_pretrained(args.bert_model, do_lower_case=args.do_lower_case)
model = BertForSequenceClassification.from_pretrained(
'bert-base-uncased', num_labels=num_labels) # 2个标签
if args.fp16:
model.half()
model.to(device)
if n_gpu > 1: # 多GPU
model = torch.nn.DataParallel(model)
tokenizer = BertTokenizer.from_pretrained('bert-base-uncased',
do_lower_case=args.do_lower_case)
# Prepare optimizer
param_optimizer = list(model.named_parameters())
no_decay = ['bias', 'LayerNorm.bias', 'LayerNorm.weight'] # 不weight_decay
optimizer_grouped_parameters = [{
'params':
[p for n, p in param_optimizer if not any(nd in n for nd in no_decay)],
'weight_decay':
0.01
}, {
'params':
[p for n, p in param_optimizer if any(nd in n for nd in no_decay)],
'weight_decay':
0.0
}]
# nd 在不在 n 中如果在把p放进去
if args.fp16:
try:
from apex.optimizers import FP16_Optimizer
from apex.optimizers import FusedAdam
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use distributed and fp16 training."
)
optimizer = FusedAdam(optimizer_grouped_parameters,
lr=args.learning_rate,
bias_correction=False,
max_grad_norm=1.0)
if args.loss_scale == 0:
optimizer = FP16_Optimizer(optimizer, dynamic_loss_scale=True)
else:
optimizer = FP16_Optimizer(optimizer,
static_loss_scale=args.loss_scale)
else:
optimizer = AdamW(optimizer_grouped_parameters, lr=args.learning_rate)
if args.do_train:
num_train_steps = None
# train_examples = processor.get_train_examples_wenpeng('/home/wyin3/Datasets/glue_data/RTE/train.tsv')
train_examples, seen_types = processor.get_examples_Wikipedia_train(
'/home/zut_csi/tomding/zs/BenchmarkingZeroShotData/tokenized_wiki2categories.txt',
100000)
# /export/home/Dataset/wikipedia/parsed_output/tokenized_wiki/tokenized_wiki2categories.txt', 100000) #train_pu_half_v1.txt
# seen_classes=[0,2,4,6,8]
eval_examples, eval_label_list, eval_hypo_seen_str_indicator, eval_hypo_2_type_index = processor.get_examples_emotion_test(
'/home/zut_csi/tomding/zs/BenchmarkingZeroShot/emotion/dev.txt',
seen_types)
# /export/home/Dataset/Stuttgart_Emotion/unify-emotion-datasets-master/zero-shot-split/dev.txt', seen_types)
test_examples, test_label_list, test_hypo_seen_str_indicator, test_hypo_2_type_index = processor.get_examples_emotion_test(
'/home/zut_csi/tomding/zs/BenchmarkingZeroShot/emotion/test.txt',
seen_types)
# /export/home/Dataset/Stuttgart_Emotion/unify-emotion-datasets-master/zero-shot-split/test.txt', seen_types)
train_features, eval_features, test_features = convert_examples_to_features(
train_examples, label_list, args.max_seq_length,
tokenizer, output_mode), convert_examples_to_features(
eval_examples, label_list, args.max_seq_length, tokenizer,
output_mode), convert_examples_to_features(
test_examples, label_list, args.max_seq_length, tokenizer,
output_mode)
all_input_ids, eval_all_input_ids, test_all_input_ids = torch.tensor(
[f.input_ids for f in train_features],
dtype=torch.long), torch.tensor(
[f.input_ids for f in eval_features],
dtype=torch.long), torch.tensor(
[f.input_ids for f in test_features], dtype=torch.long)
all_input_mask, eval_all_input_mask, test_all_input_mask = torch.tensor(
[f.input_mask for f in train_features],
dtype=torch.long), torch.tensor(
[f.input_mask for f in eval_features],
dtype=torch.long), torch.tensor(
[f.input_mask for f in test_features], dtype=torch.long)
all_segment_ids, eval_all_segment_ids, test_all_segment_ids = torch.tensor(
[f.segment_ids for f in train_features],
dtype=torch.long), torch.tensor(
[f.segment_ids for f in eval_features],
dtype=torch.long), torch.tensor(
[f.segment_ids for f in test_features], dtype=torch.long)
if output_mode == "classification":
all_label_ids = torch.tensor([f.label_id for f in train_features],
dtype=torch.long)
elif output_mode == "regression":
all_label_ids = torch.tensor([f.label_id for f in train_features],
dtype=torch.float)
eval_all_label_ids, test_all_label_ids = torch.tensor(
[f.label_id for f in eval_features],
dtype=torch.long), torch.tensor(
[f.label_id for f in test_features], dtype=torch.long)
train_data, eval_data, test_data = TensorDataset(
all_input_ids, all_input_mask,
all_segment_ids, all_label_ids), TensorDataset(
eval_all_input_ids, eval_all_input_mask, eval_all_segment_ids,
eval_all_label_ids), TensorDataset(test_all_input_ids,
test_all_input_mask,
test_all_segment_ids,
test_all_label_ids)
train_sampler, eval_sampler, test_sampler = RandomSampler(
train_data), SequentialSampler(eval_data), SequentialSampler(
test_data)
eval_dataloader, test_dataloader, train_dataloader = DataLoader(
eval_data, sampler=eval_sampler,
batch_size=args.eval_batch_size), DataLoader(
test_data,
sampler=test_sampler,
batch_size=args.eval_batch_size), DataLoader(
train_data,
sampler=train_sampler,
batch_size=args.train_batch_size)
# ?？？？？？？？？？？？？？batch_size 已经除 args.gradient_accumulation_steps？？？？？？？？？？？？？？？？？
num_train_steps = int(
len(train_examples) / args.train_batch_size /
args.gradient_accumulation_steps) * args.num_train_epochs
if args.local_rank != -1:
num_train_steps = num_train_steps // torch.distributed.get_world_size(
) # 全局的整个的进程数
max_test_unseen_acc, max_dev_unseen_acc, max_dev_seen_acc, max_overall_acc = 0.0, 0.0, 0.0, 0.0 #
logger.info(
'****************************************************** Running_training ***************************************************'
)
logger.info("Num_examples:{} Batch_size:{} Num_steps:{}".format(
len(train_examples), args.train_batch_size, num_train_steps))
for _ in trange(int(args.num_train_epochs), desc="Epoch"):
train_loss = 0
for train_step, batch_data in enumerate(
tqdm(train_dataloader, desc="Iteration")):
model.train()
batch_data = tuple(b.to(device) for b in batch_data)
input_ids, input_mask, segment_ids, label_ids = batch_data
logits = model(input_ids, segment_ids, input_mask,
labels=None)[0]
tmp_train_loss = CrossEntropyLoss()(logits.view(
-1, num_labels), label_ids.view(-1))
if n_gpu > 1: # 多GPU
tmp_train_loss = tmp_train_loss.mean(
) # mean() to average on multi-gpu.
if args.gradient_accumulation_steps > 1:
tmp_train_loss = tmp_train_loss / args.gradient_accumulation_steps
tmp_train_loss.backward()
train_loss += tmp_train_loss.item()
optimizer.step()
optimizer.zero_grad()
if (train_step + 1
) % 200 == 0: # start evaluate on dev set after this epoch
def et(et_dataloader, max_et_unseen_acc, et_label_list,
et_hypo_seen_str_indicator, et_hypo_2_type_index):
model.eval()
et_loss, et_step, preds = 0, 0, []
for input_ids, input_mask, segment_ids, label_ids in et_dataloader:
input_ids, input_mask, segment_ids, label_ids = input_ids.to(
device), input_mask.to(device), segment_ids.to(
device), label_ids.to(device)
with torch.no_grad():
logits = model(input_ids,
segment_ids,
input_mask,
labels=None)[0]
tmp_et_loss = CrossEntropyLoss()(logits.view(
-1, num_labels), label_ids.view(-1))
et_loss += tmp_et_loss.mean().item()
et_step += 1
if len(preds) == 0:
preds.append(logits.detach().cpu().numpy())
# 进行反向传播时，到该调用detach()的Variable就会停止，不能再继续向前进行传播.
# cpu()函数作用是将数据从GPU上复制到memory上，相对应的函数是cuda()
else:
preds[0] = np.append(
preds[0],
logits.detach().cpu().numpy(),
axis=0)
et_loss = et_loss / et_step
preds = preds[0]
'''
preds: size*2 (entail, not_entail)
wenpeng added a softxmax so that each row is a prob vec
'''
pred_probs = softmax(preds, axis=1)[:, 0]
pred_binary_labels_harsh, pred_binary_labels_loose = [], []
for i in range(preds.shape[0]):
pred_binary_labels_harsh.append(
0
) if preds[i][0] > preds[i][
1] + 0.1 else pred_binary_labels_harsh.append(
1)
pred_binary_labels_loose.append(
0) if preds[i][0] > preds[i][
1] else pred_binary_labels_loose.append(1)
seen_acc, unseen_acc = evaluate_emotion_zeroshot_TwpPhasePred(
pred_probs, pred_binary_labels_harsh,
pred_binary_labels_loose, et_label_list,
et_hypo_seen_str_indicator, et_hypo_2_type_index,
seen_types)
# result = compute_metrics('F1', preds, all_label_ids.numpy())
loss = train_loss / train_step if args.do_train else None
# test_acc = mean_f1#result.get("f1")
if unseen_acc > max_et_unseen_acc:
max_et_unseen_acc = unseen_acc
print(
'seen_f1:{} unseen_f1:{} max_unseen_f1:{}'.format(
seen_acc, unseen_acc, max_et_unseen_acc))
return max_et_unseen_acc
# if seen_acc+unseen_acc > max_overall_acc:
# max_overall_acc = seen_acc + unseen_acc
# if seen_acc > max_dev_seen_acc:
# max_dev_seen_acc = seen_acc
logger.info(
'********************* Running evaluation *********************'
)
logger.info("Num_examples:{} Batch_size:{}".format(
len(eval_examples), args.eval_batch_size))
max_dev_unseen_acc = et(eval_dataloader,
max_dev_unseen_acc,
eval_label_list,
eval_hypo_seen_str_indicator,
eval_hypo_2_type_index)
logger.info(
'********************* Running testing *********************'
)
logger.info("Num_examples:{} Batch_size:{}".format(
len(test_examples), args.eval_batch_size))
max_test_unseen_acc = et(test_dataloader,
max_test_unseen_acc,
test_label_list,
test_hypo_seen_str_indicator,
test_hypo_2_type_index)
#loss를 담을 리스트
losses = []
for i in range(epochs):
model.train()
y_pred = model(X_train)
Y_train = Y_train.squeeze()
loss = CrossEntropyLoss()(y_pred, Y_train)
losses.append(loss)
if i % 10 == 0:
print(f'epoch {i}, loss is {loss}')
#역전파 수행
optimizer.zero_grad()
loss.backward()
optimizer.step() #갱신
plt.plot(range(epochs), losses)
plt.ylabel('loss')
plt.xlabel('Epoch')
#plt.show()
# 테스트
correct = 0
print("\n\n\n---------------테스트---------------")
with torch.no_grad():
for i, data in enumerate(X_test):
y_val = model.forward(data)
