def init_optimizer(args, model, optimization_step):
# Prepare optimizer and schedule (linear warmup and decay)
no_decay = ["bias", "LayerNorm.weight"]
optimizer_grouped_parameters = [
{
"params": [
p for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay)
],
"weight_decay":
args.weight_decay,
},
{
"params": [
p for n, p in model.named_parameters()
if any(nd in n for nd in no_decay)
],
"weight_decay":
0.0
},
]
optimizer = AdamW(optimizer_grouped_parameters, lr=args.learning_rate)
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=int(optimization_step *
args.warmup),
t_total=optimization_step)
return optimizer, scheduler
def train(args, train_dataset, model, tokenizer):
""" Train the model """
args.train_batch_size = args.per_gpu_train_batch_size * max(1, args.n_gpu)
train_sampler = RandomSampler(train_dataset)
train_dataloader = DataLoader(train_dataset,
sampler=train_sampler,
batch_size=args.train_batch_size)
if args.max_steps > 0:
t_total = args.max_steps
args.num_train_epochs = args.max_steps // (
len(train_dataloader) // args.gradient_accumulation_steps) + 1
else:
t_total = len(
train_dataloader
) // args.gradient_accumulation_steps * args.num_train_epochs
# Prepare optimizer and schedule (linear warmup and decay)
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params': [
p for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
args.weight_decay
}, {
'params': [
p for n, p in model.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
optimizer = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=args.warmup_steps,
t_total=t_total)
# multi-gpu training (should be after apex fp16 initialization)
if args.n_gpu > 1:
model = torch.nn.DataParallel(model)
# Train!
logger.info("***** Running training *****")
logger.info(" Num examples = %d", len(train_dataset))
logger.info(" Num Epochs = %d", args.num_train_epochs)
logger.info(" Instantaneous batch size per GPU = %d",
args.per_gpu_train_batch_size)
logger.info(" Gradient Accumulation steps = %d",
args.gradient_accumulation_steps)
logger.info(" Total optimization steps = %d", t_total)
global_step = 0
tr_loss, logging_loss = 0.0, 0.0
model.zero_grad()
train_iterator = trange(int(args.num_train_epochs), desc="Epoch")
set_seed(
args) # Added here for reproductibility (even between python 2 and 3)
for _ in train_iterator:
epoch_iterator = tqdm(train_dataloader, desc="Iteration")
for step, batch in enumerate(epoch_iterator):
model.train()
batch = tuple(t.to(args.device) for t in batch)
inputs = {
'input_ids': batch[0],
'attention_mask': batch[1],
'align_mask': batch[2],
'labels': batch[4]
}
inputs['token_type_ids'] = batch[3]
outputs = model(**inputs)
loss = outputs[
0] # model outputs are always tuple in transformers (see doc)
if args.n_gpu > 1:
loss = loss.mean(
) # mean() to average on multi-gpu parallel training
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(),
args.max_grad_norm)
tr_loss += loss.item()
if (step + 1) % args.gradient_accumulation_steps == 0:
optimizer.step()
scheduler.step() # Update learning rate schedule
model.zero_grad()
global_step += 1
if args.logging_steps > 0 and global_step % args.logging_steps == 0:
if args.evaluate_during_training:
results = evaluate(args, model, tokenizer)
for key, value in results.items():
with open(
os.path.join(args.output_dir,
"{}.txt".format(key)),
'a+') as w:
w.write("%d\t%f\n" % (global_step, value))
with open(os.path.join(args.output_dir, "loss.txt"),
'a+') as w:
w.write(
"%d\t%f\n" %
(global_step,
(tr_loss - logging_loss) / args.logging_steps))
logging_loss = tr_loss
if args.save_steps > 0 and global_step % args.save_steps == 0:
# Save model checkpoint
output_dir = os.path.join(
args.output_dir, 'checkpoint-{}'.format(global_step))
if not os.path.exists(output_dir):
os.makedirs(output_dir)
model_to_save = model.module if hasattr(
model, 'module'
) else model # Take care of distributed/parallel training
model_to_save.save_pretrained(output_dir)
torch.save(args,
os.path.join(output_dir, 'training_args.bin'))
logger.info("Saving model checkpoint to %s", output_dir)
if args.max_steps > 0 and global_step > args.max_steps:
epoch_iterator.close()
break
if args.max_steps > 0 and global_step > args.max_steps:
train_iterator.close()
break
return global_step, tr_loss / global_step
def main():
parser = argparse.ArgumentParser()
## Required parameters
parser.add_argument(
"--data_dir",
default=None,
type=str,
required=True,
help=
"The input data dir. Should contain the .tsv files (or other data files) for the task."
)
parser.add_argument(
"--xlnet_model",
default=None,
type=str,
required=True,
help="Either one of the two: 'xlnet-large-cased', 'xlnet-base-cased'.")
parser.add_argument(
"--output_dir",
default=None,
type=str,
required=True,
help="The output directory where the model checkpoints will be written."
)
## Other parameters
parser.add_argument(
"--max_seq_length",
default=512,
type=int,
help=
"The maximum total input sequence length after WordPiece tokenization. \n"
"Sequences longer than this will be truncated, and sequences shorter \n"
"than this will be padded.")
parser.add_argument("--do_train",
default=False,
action='store_true',
help="Whether to run training.")
parser.add_argument("--do_eval",
default=False,
action='store_true',
help="Whether to run eval on the dev set.")
parser.add_argument("--train_batch_size",
default=32,
type=int,
help="Total batch size for training.")
parser.add_argument("--eval_batch_size",
default=8,
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_steps",
default=100,
type=int,
help=
"Proportion of training to perform linear learning rate warmup for. "
"E.g., 0.1 = 10%% of training.")
parser.add_argument("--weight_decay",
default=0.0,
type=float,
help="Weight deay if we apply some.")
parser.add_argument("--adam_epsilon",
default=1e-8,
type=float,
help="Epsilon for Adam optimizer.")
parser.add_argument("--no_cuda",
default=False,
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',
default=False,
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.\n"
"0 (default value): dynamic loss scaling.\n"
"Positive power of 2: static loss scaling value.\n")
args = parser.parse_args()
processor = dreamProcessor()
label_list = processor.get_labels()
if args.local_rank == -1 or args.no_cuda:
device = torch.device("cuda" if torch.cuda.is_available()
and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
else:
device = torch.device("cuda", args.local_rank)
n_gpu = 1
# Initializes the distributed backend which will take care of sychronizing nodes/GPUs
torch.distributed.init_process_group(backend='nccl')
logger.info("device %s n_gpu %d distributed training %r", device, n_gpu,
bool(args.local_rank != -1))
if args.gradient_accumulation_steps < 1:
raise ValueError(
"Invalid gradient_accumulation_steps parameter: {}, should be >= 1"
.format(args.gradient_accumulation_steps))
args.train_batch_size = int(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:
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.")
os.makedirs(args.output_dir, exist_ok=True)
## only use cased model
tokenizer = XLNetTokenizer.from_pretrained(args.xlnet_model,
do_lower_case=False)
train_examples = None
num_train_steps = None
if args.do_train:
train_examples = processor.get_train_examples(args.data_dir)
num_train_steps = int(
len(train_examples) / n_class / args.train_batch_size /
args.gradient_accumulation_steps * args.num_train_epochs)
## prepare model
model = XLNetForSequenceClassification.from_pretrained(
args.xlnet_model,
cache_dir=PYTORCH_PRETRAINED_BERT_CACHE /
'distributed_{}'.format(args.local_rank),
num_choices=3)
model.to(device)
if args.local_rank != -1:
model = torch.nn.parallel.DistributedDataParallel(
model, device_ids=[args.local_rank], output_device=args.local_rank)
elif n_gpu > 1:
model = torch.nn.DataParallel(model)
# Prepare optimizer
param_optimizer = list(model.named_parameters())
# hack to remove pooler, which is not used
# thus it produce None grad that break apex
param_optimizer = [n for n in param_optimizer if 'pooler' not in n[0]]
no_decay = ['bias', 'LayerNorm.weight']
## note: no weight decay according to XLNet paper
optimizer_grouped_parameters = [{
'params': [
p for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
args.weight_decay
}, {
'params': [
p for n, p in model.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
t_total = num_train_steps
if args.local_rank != -1:
t_total = t_total // torch.distributed.get_world_size()
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:
# Adam Epsilon fixed at 1e-6 according to XLNet paper
optimizer = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
warmup_steps = args.warmup_steps
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=warmup_steps,
t_total=t_total)
global_step = 0
if args.do_train:
train_features = convert_examples_to_features(train_examples,
label_list,
args.max_seq_length,
tokenizer)
logger.info("***** Running training *****")
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)
input_ids = []
input_mask = []
segment_ids = []
label_id = []
for f in train_features:
input_ids.append([])
input_mask.append([])
segment_ids.append([])
for i in range(n_class):
## put three input sequences tgt
input_ids[-1].append(f[i].input_ids)
input_mask[-1].append(f[i].input_mask)
segment_ids[-1].append(f[i].segment_ids)
label_id.append([f[0].label_id])
all_input_ids = torch.tensor(input_ids, dtype=torch.long)
all_input_mask = torch.tensor(input_mask, dtype=torch.long)
all_segment_ids = torch.tensor(segment_ids, dtype=torch.long)
all_label_ids = torch.tensor(label_id, dtype=torch.long)
train_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_label_ids)
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)
model.train()
for ep in range(int(args.num_train_epochs)):
max_score = 0
tr_loss = 0
nb_tr_examples, nb_tr_steps = 0, 0
for step, batch in enumerate(train_dataloader):
batch = tuple(t.to(device) for t in batch)
input_ids, input_mask, segment_ids, label_ids = batch
loss, _, _ = model(input_ids=input_ids,
token_type_ids=segment_ids,
attention_mask=input_mask,
labels=label_ids,
n_class=n_class)
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
loss.backward()
tr_loss += loss.item()
nb_tr_examples += input_ids.size(0)
nb_tr_steps += 1
if (step + 1) % args.gradient_accumulation_steps == 0:
scheduler.step()
optimizer.step() # We have accumulated enought gradients
model.zero_grad()
global_step += 1
if step % 800 == 0:
logger.info("Training loss: {}, global step: {}".format(
tr_loss / nb_tr_steps, global_step))
if args.do_eval:
eval_examples = processor.get_dev_examples(args.data_dir)
eval_features = convert_examples_to_features(
eval_examples, label_list, args.max_seq_length, tokenizer)
logger.info("***** Running Dev Evaluation *****")
logger.info(" Num examples = %d", len(eval_examples))
logger.info(" Batch size = %d", args.eval_batch_size)
input_ids = []
input_mask = []
segment_ids = []
label_id = []
for f in eval_features:
input_ids.append([])
input_mask.append([])
segment_ids.append([])
for i in range(n_class):
input_ids[-1].append(f[i].input_ids)
input_mask[-1].append(f[i].input_mask)
segment_ids[-1].append(f[i].segment_ids)
label_id.append([f[0].label_id])
all_input_ids = torch.tensor(input_ids, dtype=torch.long)
all_input_mask = torch.tensor(input_mask, dtype=torch.long)
all_segment_ids = torch.tensor(segment_ids, dtype=torch.long)
all_label_ids = torch.tensor(label_id, dtype=torch.long)
eval_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_label_ids)
if args.local_rank == -1:
eval_sampler = SequentialSampler(eval_data)
else:
eval_sampler = DistributedSampler(eval_data)
eval_dataloader = DataLoader(eval_data,
sampler=eval_sampler,
batch_size=args.eval_batch_size)
model.eval()
eval_loss, eval_accuracy = 0, 0
nb_eval_steps, nb_eval_examples = 0, 0
logits_all = []
for input_ids, input_mask, segment_ids, label_ids in eval_dataloader:
input_ids = input_ids.to(device)
input_mask = input_mask.to(device)
segment_ids = segment_ids.to(device)
label_ids = label_ids.to(device)
with torch.no_grad():
tmp_eval_loss, logits, _ = model(
input_ids=input_ids,
token_type_ids=segment_ids,
attention_mask=input_mask,
labels=label_ids,
n_class=n_class)
logits = logits.detach().cpu().numpy()
label_ids = label_ids.to('cpu').numpy()
for i in range(len(logits)):
logits_all += [logits[i]]
tmp_eval_accuracy = accuracy(logits, label_ids.reshape(-1))
eval_loss += tmp_eval_loss.mean().item()
eval_accuracy += tmp_eval_accuracy
nb_eval_examples += input_ids.size(0)
nb_eval_steps += 1
eval_loss = eval_loss / nb_eval_steps
eval_accuracy = eval_accuracy / nb_eval_examples
if args.do_train:
result = {
'eval_loss': eval_loss,
'eval_accuracy': eval_accuracy,
'global_step': global_step,
'loss': tr_loss / nb_tr_steps
}
else:
result = {
'eval_loss': eval_loss,
'eval_accuracy': eval_accuracy
}
output_eval_file = os.path.join(args.output_dir,
"eval_results_test.txt")
with open(output_eval_file, "a+") as writer:
logger.info(" Epoch: %d", (ep + 1))
logger.info("***** Eval results *****")
writer.write(" Epoch: " + str(ep + 1))
for key in sorted(result.keys()):
logger.info(" %s = %s", key, str(result[key]))
writer.write("%s = %s\n" % (key, str(result[key])))
# output_eval_file = os.path.join(args.output_dir, "logits_test.txt")
# with open(output_eval_file, "w") as f:
# for i in range(len(logits_all)):
# for j in range(len(logits_all[i])):
# f.write(str(logits_all[i][j]))
# if j == len(logits_all[i])-1:
# f.write("\n")
# else:
# f.write(" ")
if eval_accuracy > max_score:
max_score = eval_accuracy
## save trained model
model_to_save = model.module if hasattr(
model,
'module') else model # Only save the model it-self
output_model_file = os.path.join(
args.output_dir,
"pytorch_model_{}epoch.bin".format(ep + 1))
torch.save(model_to_save.state_dict(), output_model_file)
else:
## save trained model
model_to_save = model.module if hasattr(
model, 'module') else model # Only save the model it-self
output_model_file = os.path.join(
args.output_dir,
"pytorch_model_{}epoch.bin".format(ep + 1))
torch.save(model_to_save.state_dict(), output_model_file)
def train(args, train_dataset, model, tokenizer):
""" Train the model """
tb_writer = SummaryWriter()
args.train_batch_size = args.per_gpu_train_batch_size * max(1, args.n_gpu)
train_sampler = RandomSampler(train_dataset)
train_dataloader = DataLoader(train_dataset,
sampler=train_sampler,
batch_size=args.train_batch_size)
if args.max_steps > 0:
t_total = args.max_steps
args.num_train_epochs = args.max_steps // (
len(train_dataloader) // args.gradient_accumulation_steps) + 1
else:
t_total = len(
train_dataloader
) // args.gradient_accumulation_steps * args.num_train_epochs
warm_up_steps = int(args.warmup_steps * t_total)
save_steps = int(args.save_steps * t_total)
# Prepare optimizer and schedule (linear warmup and decay)
no_decay = ['bias', 'LayerNorm.weight']
a = []
b = []
c = []
d = []
optimizer_grouped_parameters = []
for n, p in model.named_parameters():
if 'classifier' in n or 'linear_r' in n or 'linear_g' in n:
if any(nd in n for nd in no_decay):
a.append(p)
else:
b.append(p)
else:
if any(nd in n for nd in no_decay):
c.append(p)
else:
d.append(p)
optimizer_grouped_parameters.append({
"params": a,
"weight_decay": 0,
"lr": 2e-3
})
optimizer_grouped_parameters.append({
"params": b,
"weight_decay": args.weight_decay,
"lr": 2e-3
})
optimizer_grouped_parameters.append({"params": c, "weight_decay": 0})
optimizer_grouped_parameters.append({
"params": d,
"weight_decay": args.weight_decay
})
optimizer = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=warm_up_steps,
t_total=t_total)
# multi-gpu training (should be after apex fp16 initialization)
if args.n_gpu > 1:
model = torch.nn.DataParallel(model)
# Train!
logger.info("***** Running training *****")
logger.info(" Num examples = %d", len(train_dataset))
logger.info(" Num Epochs = %d", args.num_train_epochs)
logger.info(" Instantaneous batch size per GPU = %d",
args.per_gpu_train_batch_size)
logger.info(
" Total train batch size (w. parallel, distributed & accumulation) = %d",
args.train_batch_size * args.gradient_accumulation_steps)
logger.info(" Gradient Accumulation steps = %d",
args.gradient_accumulation_steps)
logger.info(" Total optimization steps = %d", t_total)
global_step = 0
tr_loss, logging_loss = 0.0, 0.0
model.zero_grad()
train_iterator = trange(int(args.num_train_epochs), desc="Epoch")
set_seed(
args) # Added here for reproductibility (even between python 2 and 3)
for _ in train_iterator:
epoch_iterator = tqdm(train_dataloader, desc="Iteration")
for step, batch in enumerate(epoch_iterator):
model.train()
batch = tuple(t.to(args.device) for t in batch)
inputs = {
'input_ids': batch[0],
'attention_mask': batch[1],
'align_mask': batch[2],
'labels': batch[4]
}
inputs['token_type_ids'] = None
outputs = model(**inputs)
loss = outputs[
0] # model outputs are always tuple in transformers (see doc)
if args.n_gpu > 1:
loss = loss.mean(
) # mean() to average on multi-gpu parallel training
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
loss.backward()
tr_loss += loss.item()
if (step + 1) % args.gradient_accumulation_steps == 0:
torch.nn.utils.clip_grad_norm_(model.parameters(),
args.max_grad_norm)
optimizer.step()
scheduler.step() # Update learning rate schedule
model.zero_grad()
global_step += 1
if args.logging_steps > 0 and global_step % args.logging_steps == 0:
# Log metrics
tb_writer.add_scalar('lr_n',
scheduler.get_lr()[0], global_step)
tb_writer.add_scalar('lr_o',
scheduler.get_lr()[2], global_step)
tb_writer.add_scalar('loss', (tr_loss - logging_loss) /
args.logging_steps, global_step)
logging_loss = tr_loss
if save_steps > 0 and global_step % save_steps == 0:
# Save model checkpoint
if args.evaluate_during_training: # Only evaluate when single GPU otherwise metrics may not average well
results = evaluate(args, model, tokenizer)
for key, value in results.items():
tb_writer.add_scalar('eval_{}'.format(key), value,
global_step)
output_dir = os.path.join(
args.output_dir, 'checkpoint-{}'.format(global_step))
if not os.path.exists(output_dir):
os.makedirs(output_dir)
model_to_save = model.module if hasattr(
model, 'module'
) else model # Take care of distributed/parallel training
model_to_save.save_pretrained(output_dir)
torch.save(args,
os.path.join(output_dir, 'training_args.bin'))
logger.info("Saving model checkpoint to %s", output_dir)
if args.max_steps > 0 and global_step > args.max_steps:
epoch_iterator.close()
break
if args.max_steps > 0 and global_step > args.max_steps:
train_iterator.close()
break
tb_writer.close()
return global_step, tr_loss / global_step
def main():
parser = argparse.ArgumentParser()
# Required parameters
parser.add_argument(
"--output_dir",
default='output',
type=str,
help=
"The output directory where the model checkpoints and predictions will be written."
)
parser.add_argument("--checkpoint",
default='pretrain_ckpt/bert_small_ckpt.bin',
type=str,
help="checkpoint")
parser.add_argument("--model_config",
default='data/bert_small.json',
type=str)
# Other parameters
parser.add_argument("--train_file",
default='data/KorQuAD_v1.0_train.json',
type=str,
help="SQuAD json for training. E.g., train-v1.1.json")
parser.add_argument(
"--max_seq_length",
default=512,
type=int,
help=
"The maximum total input sequence length after WordPiece tokenization. Sequences "
"longer than this will be truncated, and sequences shorter than this will be padded."
)
parser.add_argument(
"--doc_stride",
default=128,
type=int,
help=
"When splitting up a long document into chunks, how much stride to take between chunks."
)
parser.add_argument(
"--max_query_length",
default=96,
type=int,
help=
"The maximum number of tokens for the question. Questions longer than this will "
"be truncated to this length.")
parser.add_argument("--train_batch_size",
default=32,
type=int,
help="Total batch size for training.")
parser.add_argument("--learning_rate",
default=5e-5,
type=float,
help="The initial learning rate for Adam.")
parser.add_argument("--num_train_epochs",
default=8.0,
type=float,
help="Total number of training epochs to perform.")
parser.add_argument("--max_grad_norm",
default=1.0,
type=float,
help="Max gradient norm.")
parser.add_argument("--adam_epsilon",
default=1e-6,
type=float,
help="Epsilon for Adam optimizer.")
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(
"--n_best_size",
default=20,
type=int,
help=
"The total number of n-best predictions to generate in the nbest_predictions.json "
"output file.")
parser.add_argument(
"--max_answer_length",
default=30,
type=int,
help=
"The maximum length of an answer that can be generated. This is needed because the start "
"and end predictions are not conditioned on one another.")
parser.add_argument(
"--verbose_logging",
action='store_true',
help=
"If true, all of the warnings related to data processing will be printed. "
"A number of warnings are expected for a normal SQuAD evaluation.")
parser.add_argument("--no_cuda",
action='store_true',
help="Whether not to use CUDA when available")
parser.add_argument('--seed',
type=int,
default=42,
help="random seed for initialization")
parser.add_argument(
'--fp16',
action='store_true',
help="Whether to use 16-bit float precision instead of 32-bit")
parser.add_argument(
'--fp16_opt_level',
type=str,
default='O2',
help=
"For fp16: Apex AMP optimization level selected in ['O0', 'O1', 'O2', and 'O3']."
"See details at https://nvidia.github.io/apex/amp.html")
parser.add_argument(
'--null_score_diff_threshold',
type=float,
default=0.0,
help=
"If null_score - best_non_null is greater than the threshold predict null."
)
args = parser.parse_args()
device = torch.device(
"cuda" if torch.cuda.is_available() and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
logger.info("device: {} n_gpu: {}, 16-bits training: {}".format(
device, n_gpu, args.fp16))
random.seed(args.seed)
np.random.seed(args.seed)
torch.manual_seed(args.seed)
if n_gpu > 0:
torch.cuda.manual_seed_all(args.seed)
if not os.path.exists(args.output_dir):
os.makedirs(args.output_dir)
tokenizer = BertTokenizer('data/ko_vocab_32k.txt',
max_len=args.max_seq_length,
do_basic_tokenize=True)
# Prepare model
config = Config.from_json_file(args.model_config)
model = QuestionAnswering(config)
model.bert.load_state_dict(torch.load(args.checkpoint))
num_params = count_parameters(model)
logger.info("Total Parameter: %d" % num_params)
model.to(device)
model = torch.nn.DataParallel(model)
cached_train_features_file = args.train_file + '_{0}_{1}_{2}'.format(
str(args.max_seq_length), str(args.doc_stride),
str(args.max_query_length))
train_examples = read_squad_examples(input_file=args.train_file,
is_training=True,
version_2_with_negative=False)
try:
with open(cached_train_features_file, "rb") as reader:
train_features = pickle.load(reader)
except:
train_features = convert_examples_to_features(
examples=train_examples,
tokenizer=tokenizer,
max_seq_length=args.max_seq_length,
doc_stride=args.doc_stride,
max_query_length=args.max_query_length,
is_training=True)
logger.info(" Saving train features into cached file %s",
cached_train_features_file)
with open(cached_train_features_file, "wb") as writer:
pickle.dump(train_features, writer)
num_train_optimization_steps = int(
len(train_features) / args.train_batch_size) * args.num_train_epochs
# Prepare optimizer
param_optimizer = list(model.named_parameters())
no_decay = ['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 = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = WarmupLinearSchedule(
optimizer,
warmup_steps=num_train_optimization_steps * 0.1,
t_total=num_train_optimization_steps)
if args.fp16:
try:
from apex import amp
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use distributed and fp16 training."
)
model, optimizer = amp.initialize(model,
optimizer,
opt_level=args.fp16_opt_level)
logger.info("***** Running training *****")
logger.info(" Num orig examples = %d", len(train_examples))
logger.info(" Num split examples = %d", len(train_features))
logger.info(" Batch size = %d", args.train_batch_size)
logger.info(" Num steps = %d", num_train_optimization_steps)
num_train_step = num_train_optimization_steps
input_ids = np.load('input_ids2.npy')
input_mask = np.load('input_mask.npy')
input_segments = np.load('input_segments.npy')
start_prob = np.load('start_prob.npy')
end_prob = np.load('end_prob.npy')
start_label = np.load('input_start.npy')
stop_label = np.load('input_stop.npy')
"""
for i in range(1000):
print(input_ids[i])
print(max(start_prob[i]))
print(sum(start_prob[i]))
input()
"""
paragraph = torch.tensor(input_ids.astype(
np.int64)).type(dtype=torch.long).cuda()
paragraph_mask = torch.tensor(input_mask.astype(
np.int64)).type(dtype=torch.long).cuda()
paragraph_segments = torch.tensor(input_segments.astype(
np.int64)).type(dtype=torch.long).cuda()
start_prob = torch.tensor(start_prob.astype(
np.float32)).type(dtype=torch.float32).cuda()
end_prob = torch.tensor(end_prob.astype(
np.float32)).type(dtype=torch.float32).cuda()
start_label = torch.tensor(start_label.astype(
np.int64)).type(dtype=torch.long).cuda()
stop_label = torch.tensor(stop_label.astype(
np.int64)).type(dtype=torch.long).cuda()
train_data = TensorDataset(paragraph, paragraph_mask, paragraph_segments,
start_label, stop_label, start_prob, end_prob)
train_sampler = RandomSampler(train_data)
train_dataloader = DataLoader(train_data,
sampler=train_sampler,
batch_size=args.train_batch_size)
model.train()
global_step = 0
epoch = 0
for _ in trange(int(args.num_train_epochs), desc="Epoch"):
iter_bar = tqdm(
train_dataloader,
desc="Train(XX Epoch) Step(XX/XX) (Mean loss=X.X) (loss=X.X)")
tr_step, total_loss, mean_loss = 0, 0., 0.
for step, batch in enumerate(iter_bar):
if n_gpu == 1:
batch = tuple(
t.to(device)
for t in batch) # multi-gpu does scattering it-self
input_ids, input_mask, segment_ids, start_positions, end_positions, start_probs, end_probs = batch
loss = model(input_ids, segment_ids, input_mask, start_positions,
end_positions, start_probs, end_probs)
if n_gpu > 1:
loss = loss.mean() # mean() to average on multi-gpu.
if args.fp16:
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
torch.nn.utils.clip_grad_norm_(amp.master_params(optimizer),
args.max_grad_norm)
else:
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(),
args.max_grad_norm)
scheduler.step()
optimizer.step()
optimizer.zero_grad()
global_step += 1
tr_step += 1
total_loss += loss
mean_loss = total_loss / tr_step
iter_bar.set_description(
"Train Step(%d / %d) (Mean loss=%5.5f) (loss=%5.5f)" %
(global_step, num_train_step, mean_loss, loss.item()))
logger.info("** ** * Saving file * ** **")
model_checkpoint = "korquad_%d.bin" % (epoch)
logger.info(model_checkpoint)
output_model_file = os.path.join(args.output_dir, model_checkpoint)
if n_gpu > 1:
torch.save(model.module.state_dict(), output_model_file)
else:
torch.save(model.state_dict(), output_model_file)
epoch += 1
def main():
parser = argparse.ArgumentParser()
## Required parameters
parser.add_argument(
"--data_dir",
default=None,
type=str,
required=True,
help=
"The input data dir. Should contain the .tsv files (or other data files) for the task."
)
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="The name of the task to train.")
parser.add_argument(
"--output_dir",
default=None,
type=str,
required=True,
help=
"The output directory where the model predictions and checkpoints will be written."
)
## Other parameters
parser.add_argument(
"--cache_dir",
default="",
type=str,
help=
"Where do you want to store the pre-trained models downloaded from s3")
parser.add_argument(
"--max_seq_length",
default=128,
type=int,
help=
"The maximum total input sequence length after WordPiece tokenization. \n"
"Sequences longer than this will be truncated, and sequences shorter \n"
"than this will be 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="Set this flag if you are using an uncased model.")
parser.add_argument("--train_batch_size",
default=32,
type=int,
help="Total batch size for training.")
parser.add_argument("--eval_batch_size",
default=8,
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.\n"
"0 (default value): dynamic loss scaling.\n"
"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.")
parser.add_argument('--load_finetuned_model',
action='store_true',
default=False,
help="Load finetuned model.")
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 = {
"compq": COMPQProcessor,
}
output_modes = {
"compq": "classification",
}
if args.local_rank == -1 or args.no_cuda:
device = torch.device("cuda" if torch.cuda.is_available()
and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
else:
torch.cuda.set_device(args.local_rank)
device = torch.device("cuda", args.local_rank)
n_gpu = 1
# Initializes the distributed backend which will take care of sychronizing nodes/GPUs
torch.distributed.init_process_group(backend='nccl')
logging.basicConfig(
format='%(asctime)s - %(levelname)s - %(name)s - %(message)s',
datefmt='%m/%d/%Y %H:%M:%S',
level=logging.INFO if args.local_rank in [-1, 0] else logging.WARN)
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))
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:
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.")
if os.path.exists(args.output_dir) and os.listdir(
args.output_dir) and args.do_train:
raise ValueError(
"Output directory ({}) already exists and is not empty.".format(
args.output_dir))
if not os.path.exists(args.output_dir):
os.makedirs(args.output_dir)
task_name = args.task_name.lower()
if task_name not in processors:
raise ValueError("Task not found: %s" % (task_name))
processor = processors[task_name]()
output_mode = output_modes[task_name]
label_list = processor.get_labels()
num_labels = len(label_list)
tokenizer = BertTokenizer.from_pretrained(args.bert_model,
do_lower_case=args.do_lower_case)
train_examples = None
num_train_optimization_steps = None
if args.do_train:
train_examples = processor.get_train_examples(args.data_dir)
num_train_optimization_steps = int(
len(train_examples) / args.train_batch_size /
args.gradient_accumulation_steps) * args.num_train_epochs
if args.local_rank != -1:
num_train_optimization_steps = num_train_optimization_steps // torch.distributed.get_world_size(
)
# Prepare model
cache_dir = args.cache_dir if args.cache_dir else os.path.join(
str(PYTORCH_PRETRAINED_BERT_CACHE), 'distributed_{}'.format(
args.local_rank))
if args.load_finetuned_model:
print("Loading finetuned model....")
model = BertForSequenceClassification.from_pretrained(
args.output_dir, num_labels=num_labels)
tokenizer = BertTokenizer.from_pretrained(
args.output_dir, do_lower_case=args.do_lower_case)
else:
model = BertForSequenceClassification.from_pretrained(
args.bert_model, num_labels=num_labels)
if args.fp16:
model.half()
model.to(device)
if args.local_rank != -1:
try:
from apex.parallel import DistributedDataParallel as DDP
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use distributed and fp16 training."
)
model = DDP(model)
elif n_gpu > 1:
model = torch.nn.DataParallel(model)
global_step = 0
nb_tr_steps = 0
tr_loss = 0
if args.do_train:
# 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
}]
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)
warmup_linear = WarmupLinearSchedule(
warmup=args.warmup_proportion,
t_total=num_train_optimization_steps)
else:
optimizer = BertAdam(optimizer_grouped_parameters,
lr=args.learning_rate,
warmup=args.warmup_proportion,
t_total=num_train_optimization_steps)
train_features = convert_examples_to_features(train_examples,
label_list,
args.max_seq_length,
tokenizer, output_mode)
logger.info("***** Running training *****")
logger.info(" Num examples = %d", len(train_examples))
logger.info(" Batch size = %d", args.train_batch_size)
logger.info(" Num steps = %d", num_train_optimization_steps)
all_input_ids = torch.tensor([f.input_ids for f in train_features],
dtype=torch.long)
all_input_mask = torch.tensor([f.input_mask for f in train_features],
dtype=torch.long)
all_segment_ids = torch.tensor([f.segment_ids for f in train_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)
train_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_label_ids)
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)
model.train()
for _ in trange(int(args.num_train_epochs), desc="Epoch"):
tr_loss = 0
nb_tr_examples, nb_tr_steps = 0, 0
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
# define a new function to compute loss values for both output_modes
logits = model(input_ids, segment_ids, input_mask, labels=None)
if output_mode == "classification":
loss_fct = CrossEntropyLoss()
loss = loss_fct(logits.view(-1, num_labels),
label_ids.view(-1))
elif output_mode == "regression":
loss_fct = MSELoss()
loss = loss_fct(logits.view(-1), label_ids.view(-1))
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()
tr_loss += loss.item()
nb_tr_examples += input_ids.size(0)
nb_tr_steps += 1
if (step + 1) % args.gradient_accumulation_steps == 0:
if args.fp16:
# modify learning rate with special warm up BERT uses
# if args.fp16 is False, BertAdam is used that handles this automatically
lr_this_step = args.learning_rate * warmup_linear.get_lr(
global_step, 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 args.do_train and (args.local_rank == -1
or torch.distributed.get_rank() == 0):
# Save a trained model, configuration and tokenizer
model_to_save = model.module if hasattr(
model, 'module') else model # Only save the model it-self
# If we save using the predefined names, we can load using `from_pretrained`
output_model_file = os.path.join(args.output_dir, WEIGHTS_NAME)
output_config_file = os.path.join(args.output_dir, CONFIG_NAME)
torch.save(model_to_save.state_dict(), output_model_file)
model_to_save.config.to_json_file(output_config_file)
tokenizer.save_vocabulary(args.output_dir)
model.to(device)
if args.do_eval and (args.local_rank == -1
or torch.distributed.get_rank() == 0):
eval_examples = processor.get_dev_examples(args.data_dir)
eval_features = convert_examples_to_features(eval_examples, label_list,
args.max_seq_length,
tokenizer, output_mode)
logger.info("***** Running evaluation *****")
logger.info(" Num examples = %d", len(eval_examples))
logger.info(" Batch size = %d", args.eval_batch_size)
all_input_ids = torch.tensor([f.input_ids for f in eval_features],
dtype=torch.long)
all_input_mask = torch.tensor([f.input_mask for f in eval_features],
dtype=torch.long)
all_segment_ids = torch.tensor([f.segment_ids for f in eval_features],
dtype=torch.long)
if output_mode == "classification":
all_label_ids = torch.tensor([f.label_id for f in eval_features],
dtype=torch.long)
elif output_mode == "regression":
all_label_ids = torch.tensor([f.label_id for f in eval_features],
dtype=torch.float)
eval_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_label_ids)
# Run prediction for full data
eval_sampler = SequentialSampler(eval_data)
eval_dataloader = DataLoader(eval_data,
sampler=eval_sampler,
batch_size=args.eval_batch_size)
model.eval()
eval_loss = 0
nb_eval_steps = 0
preds = []
softmax_preds = []
for input_ids, input_mask, segment_ids, label_ids in tqdm(
eval_dataloader, desc="Evaluating"):
input_ids = input_ids.to(device)
input_mask = input_mask.to(device)
segment_ids = segment_ids.to(device)
label_ids = label_ids.to(device)
with torch.no_grad():
logits = model(input_ids, segment_ids, input_mask, labels=None)
# create eval loss and other metric required by the task
if output_mode == "classification":
loss_fct = CrossEntropyLoss()
tmp_eval_loss = loss_fct(logits.view(-1, num_labels),
label_ids.view(-1))
elif output_mode == "regression":
loss_fct = MSELoss()
tmp_eval_loss = loss_fct(logits.view(-1), label_ids.view(-1))
eval_loss += tmp_eval_loss.mean().item()
nb_eval_steps += 1
if len(preds) == 0:
preds.append(logits.detach().cpu().numpy())
softmax_preds.append(Softmax(1)(logits).detach().cpu().numpy())
else:
preds[0] = np.append(preds[0],
logits.detach().cpu().numpy(),
axis=0)
softmax_preds[0] = np.append(
softmax_preds[0],
Softmax(1)(logits).detach().cpu().numpy(),
axis=0)
eval_loss = eval_loss / nb_eval_steps
preds = preds[0]
softmax_preds = softmax_preds[0]
output_prediction_file = os.path.join(args.output_dir,
"predictions.txt")
with open(output_prediction_file, 'w') as writer:
for i, pred in enumerate(softmax_preds):
writer.write(
str(pred[0]) + '\t' + str(pred[1]) + '\t' +
eval_examples[i].text_a + '\n')
if output_mode == "classification":
preds = np.argmax(preds, axis=1)
elif output_mode == "regression":
preds = np.squeeze(preds)
result = compute_metrics(task_name, preds, all_label_ids.numpy())
loss = tr_loss / nb_tr_steps if args.do_train else None
result['eval_loss'] = eval_loss
result['global_step'] = global_step
result['loss'] = loss
output_eval_file = os.path.join(args.output_dir, "eval_results.txt")
with open(output_eval_file, "w") as writer:
logger.info("***** Eval results *****")
for key in sorted(result.keys()):
logger.info(" %s = %s", key, str(result[key]))
writer.write("%s = %s\n" % (key, str(result[key])))
def train(self):
from datetime import datetime
current_time = datetime.now().strftime('%b%d_%H-%M-%S')
task = self.args.task
tb_writer = SummaryWriter(log_dir='./runs/' + task + "/" +
current_time + self.args.prefix,
comment=self.args.prefix)
vocabs, lexical_mapping = self._build_model()
train_data = DataLoader(self.args,
vocabs,
lexical_mapping,
self.args.train_data,
self.args.batch_size,
for_train=True)
dev_data = DataLoader(self.args,
vocabs,
lexical_mapping,
self.args.dev_data,
self.args.batch_size,
for_train=False)
test_data = DataLoader(self.args,
vocabs,
lexical_mapping,
self.args.test_data,
self.args.batch_size,
for_train='Eval')
train_data.set_unk_rate(self.args.unk_rate)
# WRITE PARAMETERS
with open('./' + 'param' + '.txt', 'w') as f:
for name, param in self.model.named_parameters():
f.writelines('name:' + name + "\n")
f.writelines(str(param))
f.writelines('size:' + str(param.size()) + '\n')
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params': [
p for n, p in self.model.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
0.
}, {
'params': [
p for n, p in self.model.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
gradient_accumulation_steps = 1
t_total = len(
train_data) // gradient_accumulation_steps * self.args.epochs
optimizer = AdamW(optimizer_grouped_parameters,
lr=self.args.lr,
eps=self.args.adam_epsilon)
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=self.args.warmup_steps,
t_total=t_total)
self.model.zero_grad()
set_seed(42, self.args.gpus)
batches_acm, loss_acm = 0, 0
# Train!
logger.info("***** Running training *****")
logger.info(" Task: %s", self.args.task)
logger.info(" Num examples = %d", len(train_data))
logger.info(" Num Epochs = %d", self.args.epochs)
logger.info(" Total optimization steps = %d", t_total)
logger.info(" Running Language Model = %s", self.args.lm_model)
logger.info(" Running Model = %s", self.args.encoder_type)
best_acc = 0
best_model_wts = copy.deepcopy(self.model.state_dict())
total_steps = 0
train_iterator = trange(int(self.args.epochs), desc="Epoch")
# initialize the early_stopping object
early_stopping = EarlyStopping(patience=self.args.patience,
verbose=True)
for _ in train_iterator:
epoch_iterator = tqdm(train_data, desc="Iteration")
running_loss = 0.0
running_corrects = 0
batch_count = self.args.batch_multiplier
# Turn on the train mode
for step, batch in enumerate(epoch_iterator):
self.model.train()
batch = move_to_cuda(batch, self.device)
logits, labels, ans_ids = self.model(batch, train=True)
logits_for_pred = logits.clone().detach()
loss = self.criterion(logits, labels)
loss_value = loss.item()
pred_values, pred_indices = torch.max(logits_for_pred, 1)
labels = labels.tolist()
pred = pred_indices.tolist()
corrects = [i for i, j in zip(labels, pred) if i == j]
# Statistics
running_loss += loss.item()
running_corrects += len(corrects)
if batch_count == 0:
torch.nn.utils.clip_grad_norm_(self.model.parameters(),
1.0)
optimizer.step()
scheduler.step()
total_steps += 1
optimizer.zero_grad()
self.model.zero_grad()
batch_count = self.args.batch_multiplier
loss_acm += loss_value
loss.backward()
batch_count -= 1
if (batches_acm %
(self.args.batch_multiplier * self.args.batch_size)
== 0) & (batches_acm != 0) & (step != 0):
logger.info(
'Train Epoch %d, Batch %d, loss %.3f, Accuracy %.3f',
_, batches_acm, loss_acm / batches_acm,
running_corrects / (self.args.batch_size * step))
tb_writer.add_scalar('Training_loss',
loss_acm / batches_acm, batches_acm)
tb_writer.add_scalar(
'Training_Accuracy',
running_corrects / (self.args.batch_size * step))
torch.cuda.empty_cache()
batches_acm += 1
epoch_loss = running_loss / batches_acm
epoch_acc = running_corrects / len(train_data)
print('{} Loss: {:.4f} Acc: {:.4f}'.format(_, epoch_loss,
epoch_acc))
tb_writer.add_scalar('Training_Epoch_loss', epoch_loss, _)
tb_writer.add_scalar('Training_Epoch_Accuracy', epoch_acc, _)
# Evaluate on Development Set
eval_epoch_acc, eval_epoch_loss = self._run_evaluate(
dev_data, _, write_answer=False)
print('Overall_Dev Acc: {:.4f}'.format(eval_epoch_acc))
tb_writer.add_scalar('Dev_Epoch_Accuracy', eval_epoch_acc, _)
##################################
# Evaluate on Test Set
test_epoch_acc, test_epoch_loss = self._run_evaluate(
test_data, _, write_answer=True)
print('Overall_Test Acc: {:.4f}'.format(test_epoch_acc))
tb_writer.add_scalar('Test_Epoch_Accuracy', test_epoch_acc, _)
# Save only best accuracy model on dev set
if eval_epoch_acc > best_acc:
best_acc = eval_epoch_acc
best_model_wts = copy.deepcopy(self.model.state_dict())
# early_stopping needs the validation loss to check if it has decresed,
# and if it has, it will make a checkpoint of the current model
early_stopping(epoch_acc, self.model)
if early_stopping.early_stop:
print("Early stopping")
break
self.model.train()
logger.info('Best val Acc: {:4f}'.format(best_acc))
torch.save(
{
'args': self.save_args,
'model': best_model_wts
}, '%s/epoch%d_batch%d_model_best_%s' %
(self.args.ckpt, self.args.epochs, batches_acm, self.args.prefix))
def main():
parser = argparse.ArgumentParser()
# # 必要参数
parser.add_argument('--task',
default='multi',
type=str,
help='Task affecting load data and vectorize feature')
parser.add_argument(
'--loss_type',
default='double',
type=str,
help='Select loss double or single, only for multi task'
) # 针对multi任务才有效
parser.add_argument(
"--bert_model",
default="bert-base-uncased",
type=str,
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-chinese,"
"bert-base-multilingual-cased.") # 选择预训练模型参数
parser.add_argument("--debug",
default=False,
help="Whether run on small dataset") # 正常情况下都应该选择false
parser.add_argument(
"--output_dir",
default="./SQuAD/output/",
type=str,
help=
"The output directory where the model checkpoints and predictions will be written."
)
# # 其他参数
parser.add_argument("--train_file",
default="./SQuAD/version/train.json",
type=str,
help="SQuAD json for training. E.g., train-v1.1.json")
parser.add_argument(
"--predict_file",
default="./SQuAD/version/prediction.json",
type=str,
help=
"SQuAD json for predictio ns. E.g., dev-v1.1.json or test-v1.1.json")
parser.add_argument(
"--max_seq_length",
default=384,
type=int,
help=
"The maximum total input sequence length after WordPiece tokenization. Sequences "
"longer than this will be truncated, and sequences shorter than this will be padded."
)
parser.add_argument(
"--doc_stride",
default=128,
type=int,
help=
"When splitting up a long document into chunks, how much stride to take between chunks."
)
parser.add_argument(
"--max_query_length",
default=64,
type=int,
help=
"The maximum number of tokens for the question. Questions longer than this will be "
"truncated to this length.")
# # 控制参数
parser.add_argument("--do_train",
default=True,
help="Whether to run training.")
parser.add_argument("--do_predict",
default=True,
help="Whether to run eval on the dev set.")
parser.add_argument("--train_batch_size",
default=18,
type=int,
help="Total batch size for training.")
parser.add_argument("--predict_batch_size",
default=18,
type=int,
help="Total batch size for predictions.")
parser.add_argument("--learning_rate",
default=3e-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.")
parser.add_argument(
"--n_best_size",
default=20,
type=int,
help=
"The total number of n-best predictions to generate in the nbest_predictions.json file."
)
parser.add_argument(
"--max_answer_length",
default=30,
type=int,
help=
"The maximum length of an answer that can be generated.This is needed because the start "
"and end predictions are not conditioned on one another.")
parser.add_argument(
"--verbose_logging",
default=False,
help=
"If true, all of the warnings related to data processing will be printed.A number of "
"warnings are expected for a normal SQuAD evaluation.")
parser.add_argument("--no_cuda",
default=False,
help="Whether not to use CUDA when available")
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(
"--do_lower_case",
default=True,
help=
"Whether to lower case the input text. True for uncased models, False for cased models."
)
parser.add_argument("--local_rank",
type=int,
default=-1,
help="local_rank for distributed training on gpus")
parser.add_argument(
'--fp16',
default=False,
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.\n"
"0 (default value): dynamic loss scaling.Positive power of 2: static loss scaling value.\n"
)
parser.add_argument(
'--version_2_with_negative',
default=False,
help=
'If true, the SQuAD examples contain some that do not have an answer.')
parser.add_argument(
'--null_score_diff_threshold',
type=float,
default=0.0,
help=
"If null_score - best_non_null is greater than the threshold predict null."
)
args = parser.parse_args()
# if是采用单机形式，else采用的是分布式形式；因为我们没有分布式系统，所以采用单机多GPU的方式进行训练10.24
if args.local_rank == -1 or args.no_cuda:
device = torch.device("cuda" if torch.cuda.is_available()
and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
else:
torch.cuda.set_device(args.local_rank)
device = torch.device("cuda", args.local_rank)
n_gpu = 1
# Initializes the distributed backend which will take care of sychronizing nodes/GPUs
torch.distributed.init_process_group(backend='hierarchical_copy')
# 以下三句话的意义不是很大，基本操作这一部分是日志的输出形式10.24
logging.basicConfig(
format='%(asctime)s-%(levelname)s-%(name)s-%(message)s',
datefmt='%m/%d/%Y %H:%M:%S',
level=logging.INFO if args.local_rank in [-1, 0] else logging.WARN)
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))
# 以下几行均是用来设置参数10.24
args.train_batch_size = args.train_batch_size // args.gradient_accumulation_steps
random.seed(args.seed) # 设置随机种子
np.random.seed(args.seed) # 设置随机种子
torch.manual_seed(args.seed) # 为CPU设置种子用于生成随机数，以使得结果是确定的
if n_gpu > 0: # 如果使用多个GPU，应该使用torch.cuda.manual_seed_all()为所有的GPU设置种子
torch.cuda.manual_seed_all(args.seed)
# 以下三句又是基本操作，意义不大10.24
if not args.do_train and not args.do_predict:
raise ValueError(
"At least one of `do_train` or `do_predict` must be True.")
if args.do_train:
if not args.train_file:
raise ValueError(
"If `do_train` is True, then `train_file` must be specified.")
if args.do_predict:
if not args.predict_file:
raise ValueError(
"If `do_predict` is True, then `predict_file` must be specified."
)
# 以下2句是用来判断output_dir是否存在，若不存在，则创建即可（感觉有这个东西反而不太好，因为需要空文件夹）10.24
# if os.path.exists(args.output_dir) and os.listdir(args.output_dir) and args.do_train:
# raise ValueError("Output directory () already exists and is not empty.")
if not os.path.exists(args.output_dir):
os.makedirs(args.output_dir)
# 这个东西是用来干啥的（从tokenization中读取，对Tokenizer进行初始化操作）10.24
tokenizer = BertTokenizer.from_pretrained(args.bert_model,
do_lower_case=args.do_lower_case)
# 从data中读取数据的方式，一种是单队列的读取方式，另一种是多通道读取方式10.24
if args.task == 'squad':
read_examples = read_squad_examples
elif args.task == 'multi':
read_examples = read_multi_examples
# 用来加载训练样例以及优化的步骤10.24
train_examples = None
num_train_optimization_steps = None
if args.do_train:
train_examples = read_examples(
input_file=args.train_file,
is_training=True,
version_2_with_negative=args.version_2_with_negative)
if args.debug:
train_examples = train_examples[:100]
num_train_optimization_steps = \
int(len(train_examples)/args.train_batch_size/args.gradient_accumulation_steps) * args.num_train_epochs
if args.local_rank != -1:
num_train_optimization_steps = num_train_optimization_steps // torch.distributed.get_world_size(
)
# 模型准备中ing10.24
model = BertForQuestionAnswering.from_pretrained(
args.bert_model,
cache_dir=os.path.join(str(PYTORCH_PRETRAINED_BERT_CACHE),
'distributed_{}'.format(args.local_rank)))
# model = torch.nn.DataParallel(model).cuda()
# 判断是否使用float16编码10.24
if args.fp16:
# model.half().cuda()
model.half()
# 将模型加载到相应的CPU或者GPU中10.24
model.to(device)
# 配置优化器等函数10.24
if args.do_train:
param_optimizer = list(model.named_parameters())
# hack to remove pooler, which is not used
# thus it produce None grad that break apex
param_optimizer = [n for n in param_optimizer if 'pooler' not in n[0]]
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
}]
if args.fp16:
try:
# from apex.optimizers import FP16_Optimizer
from apex.fp16_utils 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=True)
if args.loss_scale == 0:
optimizer = FP16_Optimizer(optimizer, dynamic_loss_scale=True)
else:
optimizer = FP16_Optimizer(optimizer,
static_loss_scale=args.loss_scale)
warmup_linear = WarmupLinearSchedule(
warmup=args.warmup_proportion,
t_total=num_train_optimization_steps)
else:
optimizer = BertAdam(optimizer_grouped_parameters,
lr=args.learning_rate,
warmup=args.warmup_proportion,
t_total=num_train_optimization_steps)
# 进行模型的拟合训练10.24
global_step = 0
if args.do_train:
# 训练语料的特征提取
train_features = convert_examples_to_features(
examples=train_examples,
tokenizer=tokenizer,
max_seq_length=args.max_seq_length,
doc_stride=args.doc_stride,
max_query_length=args.max_query_length,
is_training=True)
logger.info("***** Running training *****")
logger.info(" Num orig examples = %d", len(train_examples))
logger.info(" Num split examples = %d", len(train_features))
logger.info(" Batch size = %d", args.train_batch_size)
logger.info(" Num steps = %d", num_train_optimization_steps)
all_input_ids = torch.tensor([f.input_ids for f in train_features],
dtype=torch.long)
all_input_mask = torch.tensor([f.input_mask for f in train_features],
dtype=torch.long)
all_segment_ids = torch.tensor([f.segment_ids for f in train_features],
dtype=torch.long)
all_start_positions = torch.tensor(
[f.start_position for f in train_features], dtype=torch.long)
all_end_positions = torch.tensor(
[f.end_position for f in train_features], dtype=torch.long)
all_start_vector = torch.tensor(
[f.start_vector for f in train_features], dtype=torch.float)
all_end_vector = torch.tensor([f.end_vector for f in train_features],
dtype=torch.float)
all_content_vector = torch.tensor(
[f.content_vector for f in train_features], dtype=torch.float)
# # 替换的内容all_start_positions以及all_end_positions
# all1_start_positions = []
# for i in range(len(train_features)):
# for j in range(len(train_features[i].start_position)):
# all1_start_positions.append(train_features[i].start_position[j])
# all_start_positions = torch.tensor([k for k in all1_start_positions], dtype=torch.long)
# all1_end_positions = []
# for i in range(len(train_features)):
# for j in range(len(train_features[i].end_position)):
# all1_end_positions.append(train_features[i].end_position[j])
# all_end_positions = torch.tensor([k for k in all1_end_positions], dtype=torch.long)
# ####################################################################
train_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_start_positions,
all_end_positions, all_start_vector,
all_end_vector, all_content_vector)
if args.local_rank == -1:
train_sampler = RandomSampler(train_data) # 随机采样器
else:
train_sampler = DistributedSampler(train_data)
train_dataloader = DataLoader(train_data,
sampler=train_sampler,
batch_size=args.train_batch_size)
model.train()
for ep in trange(int(args.num_train_epochs), desc="Epoch"):
# 每次都叫他进行分发，这样的话，就可以进行多GPU训练
model = torch.nn.DataParallel(model).cuda()
for step, batch in enumerate(
tqdm(train_dataloader,
desc="Iteration",
disable=args.local_rank not in [-1, 0])):
if n_gpu == 1:
batch = tuple(
t.to(device)
for t in batch) # multi-gpu does scattering it-self
input_ids, input_mask, segment_ids, start_positions, end_positions, start_vector, end_vector, content_vector = batch
loss = model(input_ids, segment_ids, input_mask,
start_positions, end_positions, start_vector,
end_vector, content_vector, args.loss_type)
if n_gpu > 1:
loss = loss.mean() # mean() to average on multi-gpu.
print("loss率为：{}".format(loss))
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
if args.fp16:
optimizer.backward(loss)
else:
loss.backward()
if (step + 1) % args.gradient_accumulation_steps == 0:
if args.fp16:
# modify learning rate with special warm up BERT uses
# if args.fp16 is False, BertAdam is used and handles this automatically
lr_this_step = args.learning_rate * warmup_linear.get_lr(
global_step, args.warmup_proportion)
for param_group in optimizer.param_groups:
param_group['lr'] = lr_this_step
optimizer.step()
optimizer.zero_grad()
global_step += 1
print("\n")
print(ep)
output_model_file = os.path.join(args.output_dir,
str(ep) + WEIGHTS_NAME)
output_config_file = os.path.join(args.output_dir,
str(ep) + CONFIG_NAME)
torch.save(model.state_dict(), output_model_file)
if isinstance(model, torch.nn.DataParallel):
model = model.module
model.config.to_json_file(output_config_file)
tokenizer.save_vocabulary(args.output_dir)
# 这个是用来加载进行微调调好后的代码以方便进行预测10.25
if args.do_train and (args.local_rank == -1
or torch.distributed.get_rank() == 0):
# Save a trained model, configuration and tokenizer
model_to_save = model.module if hasattr(
model, 'module') else model # Only save the model it-self
# If we save using the predefined names, we can load using `from_pretrained`
output_model_file = os.path.join(args.output_dir, WEIGHTS_NAME)
output_config_file = os.path.join(args.output_dir, CONFIG_NAME)
torch.save(model_to_save.state_dict(), output_model_file)
model_to_save.config.to_json_file(output_config_file)
tokenizer.save_vocabulary(args.output_dir)
# Load a trained model and vocabulary that you have fine-tuned
model = BertForQuestionAnswering.from_pretrained(args.output_dir)
tokenizer = BertTokenizer.from_pretrained(
args.output_dir, do_lower_case=args.do_lower_case)
else:
model = BertForQuestionAnswering.from_pretrained(args.output_dir)
tokenizer = BertTokenizer.from_pretrained(
args.output_dir, do_lower_case=args.do_lower_case)
# 再次将GPU加入10.25
model.to(device)
# 这部分就是进行相应的预测（用于生成预测文件）
if args.do_predict and (args.local_rank == -1
or torch.distributed.get_rank() == 0):
eval_examples = \
read_examples(input_file=args.predict_file, is_training=False, version_2_with_negative=args.version_2_with_negative)
if args.debug:
eval_examples = eval_examples[:100]
eval_features = convert_examples_to_features(
examples=eval_examples,
tokenizer=tokenizer,
max_seq_length=args.max_seq_length,
doc_stride=args.doc_stride,
max_query_length=args.max_query_length,
is_training=False)
logger.info("***** Running predictions *****")
logger.info(" Num orig examples = %d", len(eval_examples))
logger.info(" Num split examples = %d", len(eval_features))
logger.info(" Batch size = %d", args.predict_batch_size)
all_input_ids = torch.tensor([f.input_ids for f in eval_features],
dtype=torch.long)
all_input_mask = torch.tensor([f.input_mask for f in eval_features],
dtype=torch.long)
all_segment_ids = torch.tensor([f.segment_ids for f in eval_features],
dtype=torch.long)
all_example_index = torch.arange(all_input_ids.size(0),
dtype=torch.long)
eval_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_example_index)
# Run prediction for full data
eval_sampler = SequentialSampler(eval_data)
eval_dataloader = DataLoader(eval_data,
sampler=eval_sampler,
batch_size=args.predict_batch_size)
model.eval()
all_results = []
logger.info("Start evaluating")
for input_ids, input_mask, segment_ids, example_indices in tqdm(
eval_dataloader,
desc="Evaluating",
disable=args.local_rank not in [-1, 0]):
if len(all_results) % 1000 == 0:
logger.info("Processing example: %d" % (len(all_results)))
input_ids = input_ids.to(device)
input_mask = input_mask.to(device)
segment_ids = segment_ids.to(device)
with torch.no_grad():
batch_start_logits, batch_end_logits = model(
input_ids, segment_ids, input_mask)
for i, example_index in enumerate(example_indices):
start_logits = batch_start_logits[i].detach().cpu().tolist()
end_logits = batch_end_logits[i].detach().cpu().tolist()
eval_feature = eval_features[example_index.item()]
unique_id = int(eval_feature.unique_id)
all_results.append(
RawResult(unique_id=unique_id,
start_logits=start_logits,
end_logits=end_logits))
middle_result = os.path.join(args.output_dir, 'middle_result.pkl')
pickle.dump([eval_examples, eval_features, all_results],
open(middle_result, 'wb'))
output_prediction_file = os.path.join(args.output_dir,
"predictions.json")
output_nbest_file = os.path.join(args.output_dir,
"nbest_predictions.json")
output_null_log_odds_file = os.path.join(args.output_dir,
"null_odds.json")
if (args.loss_type == 'double'):
write_predictions_couple_labeling(
eval_examples, eval_features, all_results, args.n_best_size,
args.max_answer_length, args.do_lower_case,
output_prediction_file, output_nbest_file,
output_null_log_odds_file, args.verbose_logging,
args.version_2_with_negative, args.null_score_diff_threshold)
elif (args.loss_type == 'single'):
write_predictions_single_labeling(
eval_examples, eval_features, all_results, args.n_best_size,
args.max_answer_length, args.do_lower_case,
output_prediction_file, output_nbest_file,
output_null_log_odds_file, args.verbose_logging,
args.version_2_with_negative, args.null_score_diff_threshold)
elif (args.loss_type == 'origin') or (args.task == 'multi'
and args.loss_type == 'squad'):
write_predictions(eval_examples, eval_features, all_results,
args.n_best_size, args.max_answer_length,
args.do_lower_case, output_prediction_file,
output_nbest_file, output_null_log_odds_file,
args.verbose_logging,
args.version_2_with_negative,
args.null_score_diff_threshold)
else:
raise ValueError('{} dataset and {} loss is not support'.format(
args.task, args.loss_type))
def main():
parser = argparse.ArgumentParser()
## Required parameters
parser.add_argument("--train_data",
default=None,
type=str,
help="Train data path.")
parser.add_argument("--test_data",
default=None,
type=str,
help="Test data path.")
parser.add_argument("--eval_data",
default=None,
type=str,
help="Eval data path.")
parser.add_argument("--bert_model",
default=None,
type=str,
required=True,
help="PreTrained model path.")
parser.add_argument("--config",
default=None,
type=str,
required=True,
help="Model config path.")
parser.add_argument("--vocab",
default=None,
type=str,
required=True,
help="Vocabulary path.")
parser.add_argument("--task_name",
default=None,
type=str,
required=True,
help="The name of the task to train.")
parser.add_argument(
"--output_dir",
default=None,
type=str,
required=True,
help=
"The output directory where the model predictions and checkpoints will be written."
)
parser.add_argument(
"--result_file",
default=None,
type=str,
help=
"The output directory where the model predictions and checkpoints will be written."
)
parser.add_argument("--dic_dir",
default=None,
type=str,
required=True,
help="The dic directory which used by rule.")
## Other parameters
parser.add_argument(
"--max_seq_length",
default=128,
type=int,
help=
"The maximum total input sequence length after WordPiece tokenization. \n"
"Sequences longer than this will be truncated, and sequences shorter \n"
"than this will be padded.")
parser.add_argument("--do_train",
action='store_true',
help="Whether to run training.")
parser.add_argument("--do_predict",
action='store_true',
help="Whether to run eval on the dev set.")
parser.add_argument(
"--do_lower_case",
action='store_true',
help="Set this flag if you are using an uncased model.")
parser.add_argument("--train_batch_size",
default=32,
type=int,
help="Total batch size for training.")
parser.add_argument("--pred_batch_size",
default=32,
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('--overwrite_output_dir',
action='store_true',
help="Overwrite the content of the output directory")
parser.add_argument("--local_rank",
type=int,
default=-1,
help="local_rank for distributed training on gpus")
parser.add_argument('--seed',
type=int,
default=2019,
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.\n"
"0 (default value): dynamic loss scaling.\n"
"Positive power of 2: static loss scaling value.\n")
args = parser.parse_args()
if args.local_rank == -1 or args.no_cuda:
device = torch.device("cuda" if torch.cuda.is_available()
and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
else:
torch.cuda.set_device(args.local_rank)
device = torch.device("cuda", args.local_rank)
n_gpu = 1
# Initializes the distributed backend which will take care of sychronizing nodes/GPUs
torch.distributed.init_process_group(backend='nccl')
args.device = device
logging.basicConfig(
format='%(asctime)s - %(levelname)s - %(name)s - %(message)s',
datefmt='%m/%d/%Y %H:%M:%S',
level=logging.INFO if args.local_rank in [-1, 0] else logging.WARN)
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))
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:
torch.cuda.manual_seed_all(args.seed)
if not args.do_train and not args.do_predict:
raise ValueError(
"At least one of `do_train` or `do_predict` must be True.")
if os.path.exists(args.output_dir) and os.listdir(
args.output_dir
) and args.do_train and not args.overwrite_output_dir:
raise ValueError(
"Output directory ({}) already exists and is not empty.".format(
args.output_dir))
if not os.path.exists(args.output_dir) and args.local_rank in [-1, 0]:
os.makedirs(args.output_dir)
task_name = args.task_name.lower()
if task_name not in processors:
raise ValueError("Task not found: %s" % (task_name))
processor = processors[task_name]()
label_list = processor.get_labels()
domain_map = {}
for (i, label) in enumerate(label_list['domain']):
domain_map[label] = i
intent_map = {}
for (i, label) in enumerate(label_list['intent']):
intent_map[label] = i
slots_map = {}
for (i, label) in enumerate(label_list['slots']):
slots_map[label] = i
logger.info("***** label list *****")
for key, value in label_list.items():
logger.info("%s(%d): %s" % (key, len(value), ", ".join(value)))
if args.local_rank not in [-1, 0]:
torch.distributed.barrier(
) # Make sure only the first process in distributed training will download model & vocab
tokenizer = BertTokenizer.from_pretrained(args.vocab,
do_lower_case=args.do_lower_case)
model = BertForTaskNLU.from_pretrained(args.bert_model,
args.config,
label_list=label_list,
max_seq_len=args.max_seq_length)
if args.local_rank == 0:
torch.distributed.barrier()
if args.fp16:
model.half()
model.to(device)
if args.local_rank != -1:
model = torch.nn.parallel.DistributedDataParallel(
model,
device_ids=[args.local_rank],
output_device=args.local_rank,
find_unused_parameters=True)
elif n_gpu > 1:
model = torch.nn.DataParallel(model)
global_step = 0
nb_tr_steps = 0
tr_loss = 0
if args.do_train:
# Prepare data loader
train_examples = processor.get_train_examples(args.train_data)
random.seed(args.seed)
random.shuffle(train_examples)
train_features = convert_examples_to_features(train_examples,
domain_map, intent_map,
slots_map,
args.max_seq_length,
tokenizer)
all_input_ids = torch.tensor([f.input_ids for f in train_features],
dtype=torch.long)
all_input_mask = torch.tensor([f.input_mask for f in train_features],
dtype=torch.long)
all_segment_ids = torch.tensor([f.segment_ids for f in train_features],
dtype=torch.long)
all_domain_ids = torch.tensor([f.domain_id for f in train_features],
dtype=torch.long)
all_intent_ids = torch.tensor([f.intent_id for f in train_features],
dtype=torch.long)
all_slots_ids = torch.tensor([f.slots_id for f in train_features],
dtype=torch.long)
train_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_domain_ids,
all_intent_ids, all_slots_ids)
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)
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
}]
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)
warmup_linear = WarmupLinearSchedule(
warmup=args.warmup_proportion,
t_total=num_train_optimization_steps)
else:
optimizer = BertAdam(optimizer_grouped_parameters,
lr=args.learning_rate,
warmup=args.warmup_proportion,
t_total=num_train_optimization_steps)
logger.info("***** Running training *****")
logger.info("Num examples = %d", len(train_examples))
logger.info("Batch size = %d", args.train_batch_size)
logger.info("Num steps = %d", num_train_optimization_steps)
model.train()
for _ in range(int(args.num_train_epochs)):
tr_loss = 0
nb_tr_examples, nb_tr_steps = 0, 0
for step, batch in enumerate(train_dataloader):
batch = tuple(t.to(device) for t in batch)
input_ids, input_mask, segment_ids, domain_id, intent_id, slots_id = batch
# define a new function to compute loss values for both output_modes
domain_logits, intent_logits, slots_logits = model(
input_ids,
token_type_ids=segment_ids,
attention_mask=input_mask)
loss_fct = CrossEntropyLoss()
loss = loss_fct(domain_logits, domain_id) + loss_fct(
intent_logits, intent_id)
for i in range(len(slots_id)):
loss += loss_fct(slots_logits[i], slots_id[i])
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()
tr_loss += loss.item()
nb_tr_examples += input_ids.size(0)
nb_tr_steps += 1
if (step + 1) % args.gradient_accumulation_steps == 0:
if args.fp16:
# modify learning rate with special warm up BERT uses
# if args.fp16 is False, BertAdam is used that handles this automatically
lr_this_step = args.learning_rate * warmup_linear.get_lr(
global_step, 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 args.local_rank in [-1, 0] and nb_tr_steps % 20 == 0:
# logger.info("lr = {}, global_step = {}".format(optimizer.get_lr()[0], global_step))
logger.info("loss = {:.6f}, global_step = {}".format(
tr_loss / global_step, global_step))
### Saving best-practices: if you use defaults names for the model, you can reload it using from_pretrained()
### Example:
if args.do_train and (args.local_rank == -1
or torch.distributed.get_rank() == 0):
# Save a trained model, configuration and tokenizer
model_to_save = model.module if hasattr(
model, 'module') else model # Only save the model it-self
# If we save using the predefined names, we can load using `from_pretrained`
output_model_file = os.path.join(args.output_dir, WEIGHTS_NAME)
torch.save(model_to_save.state_dict(), output_model_file)
else:
model = BertForTaskNLU.from_pretrained(args.bert_model,
args.config,
label_list=label_list,
max_seq_len=args.max_seq_length)
model.to(device)
### prediction
if args.do_predict and (args.local_rank == -1
or torch.distributed.get_rank() == 0):
pred_examples = processor.get_test_examples(args.test_data)
pred_features = convert_examples_to_features(pred_examples, domain_map,
intent_map, slots_map,
args.max_seq_length,
tokenizer)
logger.info("***** Running prediction *****")
logger.info("Num examples = %d", len(pred_examples))
logger.info("Batch size = %d", args.pred_batch_size)
all_input_ids = torch.tensor([f.input_ids for f in pred_features],
dtype=torch.long)
all_input_mask = torch.tensor([f.input_mask for f in pred_features],
dtype=torch.long)
all_segment_ids = torch.tensor([f.segment_ids for f in pred_features],
dtype=torch.long)
pred_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids)
# Run prediction for full data
if args.local_rank == -1:
pred_sampler = SequentialSampler(pred_data)
else:
pred_sampler = DistributedSampler(
pred_data) # Note that this sampler samples randomly
pred_dataloader = DataLoader(pred_data,
sampler=pred_sampler,
batch_size=args.pred_batch_size)
model.eval()
preds = []
for input_ids, input_mask, segment_ids in pred_dataloader:
input_ids = input_ids.to(device)
input_mask = input_mask.to(device)
segment_ids = segment_ids.to(device)
with torch.no_grad():
domain_logits, intent_logits, slots_logits = model(
input_ids,
token_type_ids=segment_ids,
attention_mask=input_mask)
domain = domain_logits.detach().cpu().numpy()
intent = intent_logits.detach().cpu().numpy()
slots = slots_logits.detach().cpu().numpy()
for i in range(domain.shape[0]):
preds.append({
"domain": domain[i],
"intent": intent[i],
"slots": slots[i]
})
output_predict_file = os.path.join(args.output_dir, args.result_file)
write_result(output_predict_file, args.dic_dir, preds, pred_examples,
domain_map, intent_map, slots_map)
def main():
parser = argparse.ArgumentParser()
## Required parameters
parser.add_argument(
"--data_dir",
default='twitter',
type=str,
required=False,
help=
"The input data dir. Should contain the .tsv files (or other data files) for the task."
)
parser.add_argument(
"--bert_model",
default="bert-base-uncased",
type=str,
required=False,
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("--input_processor_type",
default="sst-wiki",
type=str,
required=False,
help="The type of processor to use for reading data.")
parser.add_argument(
"--output_dir",
default="output/twitter/",
type=str,
required=False,
help=
"The output directory where the model predictions and checkpoints will be written."
)
## Other parameters
parser.add_argument(
"--cache_dir",
default="",
type=str,
help=
"Where do you want to store the pre-trained models downloaded from s3")
parser.add_argument(
"--max_seq_length",
default=128,
type=int,
help=
"The maximum total input sequence length after WordPiece tokenization. \n"
"Sequences longer than this will be truncated, and sequences shorter \n"
"than this will be padded.")
parser.add_argument("--do_train",
default=True,
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="Set this flag if you are using an uncased model.")
parser.add_argument("--train_batch_size",
default=32,
type=int,
help="Total batch size for training.")
parser.add_argument("--eval_batch_size",
default=8,
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.\n"
"0 (default value): dynamic loss scaling.\n"
"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.")
parser.add_argument('--hammer_coeff',
type=float,
default=0.0,
help="Hammer loss coefficient")
parser.add_argument('--att_opt_func',
type=str,
default="mean",
help="Attention optimization function")
parser.add_argument("--debug", action='store_true')
parser.add_argument("--first_run", action='store_true')
parser.add_argument("--name", type=str)
# argv = ['data/twitter', "bert-base-uncased", "sst-wiki", "output/twitter/"]
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()
base_labels = {}
print(f"FIRST RUN: {args.first_run}")
# if not args.first_run:
# for typ in ["dev", "test"]:
# base_labels_content = open("{}_base_labels_{}.txt".format(args.name, typ), 'r').readlines()
# base_labels[typ] = [int(label.strip()) for label in base_labels_content]
#
debug = args.debug
if debug:
args.train_batch_size = 2
args.eval_batch_size = 2
args.num_train_epochs = 1
processors = {"sst-wiki": SstWikiProcessor, "pronoun": PronounProcessor}
output_modes = {
"sst-wiki": "classification",
"pronoun": "classification",
}
if args.local_rank == -1 or args.no_cuda:
device = torch.device("cuda" if torch.cuda.is_available()
and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
else:
torch.cuda.set_device(args.local_rank)
device = torch.device("cuda", args.local_rank)
n_gpu = 1
# Initializes the distributed backend which will take care of sychronizing nodes/GPUs
torch.distributed.init_process_group(backend='nccl')
logging.basicConfig(
format='%(asctime)s - %(levelname)s - %(name)s - %(message)s',
datefmt='%m/%d/%Y %H:%M:%S',
level=logging.INFO if args.local_rank in [-1, 0] else logging.WARN)
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))
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:
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.")
if os.path.exists(args.output_dir) and os.listdir(
args.output_dir) and args.do_train:
raise ValueError(
"Output directory ({}) already exists and is not empty.".format(
args.output_dir))
if not os.path.exists(args.output_dir):
os.makedirs(args.output_dir)
input_processor_type = args.input_processor_type.lower()
if input_processor_type not in processors:
raise ValueError("Task not found: %s" % (input_processor_type))
processor = processors[input_processor_type]()
output_mode = output_modes[input_processor_type]
label_list = processor.get_labels()
num_labels = len(label_list)
tokenizer = BertTokenizer.from_pretrained(args.bert_model,
do_lower_case=args.do_lower_case)
train_examples = None
num_train_optimization_steps = None
if args.do_train:
limit = 2 if debug else 0
train_examples = processor.get_train_examples(args.data_dir, limit)
num_train_optimization_steps = int(
len(train_examples) / args.train_batch_size /
args.gradient_accumulation_steps) * args.num_train_epochs
if args.local_rank != -1:
num_train_optimization_steps = num_train_optimization_steps // torch.distributed.get_world_size(
)
# Prepare model
cache_dir = args.cache_dir if args.cache_dir else os.path.join(
str(PYTORCH_PRETRAINED_BERT_CACHE), 'distributed_{}'.format(
args.local_rank))
model = BertForSequenceClassification.from_pretrained(
args.bert_model, cache_dir=cache_dir, num_labels=num_labels)
if args.fp16:
model.half()
model.to(device)
if args.local_rank != -1:
try:
from apex.parallel import DistributedDataParallel as DDP
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use distributed and fp16 training."
)
model = DDP(model)
elif n_gpu > 1:
model = torch.nn.DataParallel(model)
# 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
}]
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)
warmup_linear = WarmupLinearSchedule(
warmup=args.warmup_proportion,
t_total=num_train_optimization_steps)
else:
optimizer = BertAdam(optimizer_grouped_parameters,
lr=args.learning_rate,
warmup=args.warmup_proportion,
t_total=num_train_optimization_steps)
global_step = 0
nb_tr_steps = 0
tr_loss = 0
if args.do_train:
train_features = convert_examples_to_features(train_examples,
label_list,
args.max_seq_length,
tokenizer, output_mode)
logger.info("***** Running training *****")
logger.info(" Num examples = %d", len(train_examples))
logger.info(" Batch size = %d", args.train_batch_size)
logger.info(" Num steps = %d", num_train_optimization_steps)
all_input_ids = torch.tensor([f.input_ids for f in train_features],
dtype=torch.long)
all_input_mask = torch.tensor([f.input_mask for f in train_features],
dtype=torch.long)
all_segment_ids = torch.tensor([f.segment_ids for f in train_features],
dtype=torch.long)
all_label_ids = torch.tensor([f.label_id for f in train_features],
dtype=torch.long)
train_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_label_ids)
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)
print(
"typ\tepoch\tacc\tavg_mean_mass\tavg_max_mass\tloss\thammer_loss\tlabel_match_score\tavg_mean_vn\tavg_max_vn\tavg_min_vn"
)
model.train()
for epoch in trange(int(args.num_train_epochs) + 1, desc="Epoch"):
tr_loss = 0
nb_tr_examples, nb_tr_steps = 0, 0
if epoch > 0:
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
# define a new function to compute loss values for both output_modes
logits, attention_probs_layers, category_mask, _ = model(
input_ids,
token_type_ids=segment_ids,
pad_attention_mask=input_mask,
manipulate_attention=True,
category_mask=None,
labels=None)
# logits - B x 2
loss_fct = CrossEntropyLoss() # averages the loss over B
loss = loss_fct(logits,
torch.argmax(label_ids.view(-1), 1).long())
# loss = loss_fct(logits.view(-1, num_labels), label_ids.view(-1))
loss += attention_regularization_loss(
attention_probs_layers,
category_mask,
input_mask,
args.hammer_coeff,
optimize_func=args.att_opt_func,
debug=debug)[0]
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()
tr_loss += loss.item()
nb_tr_examples += input_ids.size(0)
nb_tr_steps += 1
if (step + 1) % args.gradient_accumulation_steps == 0:
if args.fp16:
# modify learning rate with special warm up BERT uses
# if args.fp16 is False, BertAdam is used that handles this automatically
lr_this_step = args.learning_rate * warmup_linear.get_lr(
global_step / num_train_optimization_steps,
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 debug:
break
# EVALUATION AFTER EVERY EPOCH
eval_preds = {}
for typ in ["dev", "test"]:
eval_preds[typ] = run_evaluation(args, processor, label_list,
tokenizer, output_mode, epoch,
model, num_labels, tr_loss,
global_step, device,
input_processor_type,
base_labels, debug, typ)
#dump labels after the last epoch, or when first_run
if args.first_run or epoch == args.num_train_epochs:
for typ in ["dev", "test"]:
preds = eval_preds[typ]
filename = "{}_labels_{}_.txt".format(typ, epoch)
labels_file = os.path.join(args.output_dir, filename)
with open(labels_file, "w") as writer:
logger.info("Dumping labels in the file: {}".format(
labels_file))
writer.write('\n'.join([str(pred) for pred in preds]))
if args.do_train and (args.local_rank == -1
or torch.distributed.get_rank() == 0):
# Save a trained model, configuration and tokenizer
model_to_save = model.module if hasattr(
model, 'module') else model # Only save the model it-self
# If we save using the predefined names, we can load using `from_pretrained`
output_model_file = os.path.join(args.output_dir, WEIGHTS_NAME)
output_config_file = os.path.join(args.output_dir, CONFIG_NAME)
torch.save(model_to_save.state_dict(), output_model_file)
model_to_save.config.to_json_file(output_config_file)
tokenizer.save_vocabulary(args.output_dir)
# Load a trained model and vocabulary that you have fine-tuned
model = BertForSequenceClassification.from_pretrained(
args.output_dir, num_labels=num_labels)
tokenizer = BertTokenizer.from_pretrained(
args.output_dir, do_lower_case=args.do_lower_case)
else:
model = BertForSequenceClassification.from_pretrained(
args.bert_model, num_labels=num_labels)
model.to(device)
def main():
parser = argparse.ArgumentParser()
# Required Parameters
parser.add_argument(
"--output_dir",
default='output',
type=str,
help=
"The output directory where the model checkpoints and predictions will be written."
)
parser.add_argument("--checkpoint",
default='pretrain_ckpt/bert_small_ckpt.bin',
type=str,
help="checkpoint")
parser.add_argument("--resume_checkpoint",
default=False,
type=bool,
help="resume")
parser.add_argument('--log_dir', default='./runs', type=str)
# Other Parameters
parser.add_argument("--train_feature",
default='./rsc/train_features.hdf5',
type=str,
help="SQuAD corpus for post-training.")
parser.add_argument("--train_batch_size",
default=16,
type=int,
help="Total batch size for training.")
parser.add_argument("--learning_rate",
default=5e-5,
type=float,
help="The initial learning rate for Adam.")
parser.add_argument("--num_train_epochs",
default=4.0,
type=float,
help="Total number of training epochs to perform.")
parser.add_argument("--max_grad_norm",
default=1.0,
type=float,
help="Max gradient norm.")
parser.add_argument("--adam_epsilon",
default=1e-6,
type=float,
help="Epsilon for Adam optimizer.")
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("--num_workers",
default=8,
type=int,
help="Proportion of workers of DataLoader")
parser.add_argument("--no_cuda",
action='store_true',
help="Whether not to use CUDA when available")
parser.add_argument('--seed',
type=int,
default=42,
help="random seed for initialization")
parser.add_argument(
'--fp16',
action='store_true',
help="Whether to use 16-bit float precision instead of 32-bit")
parser.add_argument(
'--fp16_opt_level',
type=str,
default='O2',
help=
"For fp16: Apex AMP optimization level selected in ['O0', 'O1', 'O2', and 'O3']."
"See details at https://nvidia.github.io/apex/amp.html")
args = parser.parse_args()
summary_writer = SummaryWriter(args.log_dir)
device = torch.device(
"cuda" if torch.cuda.is_available() and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
logger.info("device: {} n_gpu: {}, 16-bits training: {}".format(
device, n_gpu, args.fp16))
random.seed(args.seed)
np.random.seed(args.seed)
torch.manual_seed(args.seed)
if n_gpu > 0:
torch.cuda.manual_seed_all(args.seed)
if not os.path.exists(args.output_dir):
os.makedirs(args.output_dir)
# Prepare model
model = SampleCNN()
# Multi-GPU Setting
# if n_gpu > 1:
# model = nn.DataParallel(model)
num_params = count_parameters(model)
logger.info("Total Parameter: %d" % num_params)
model.to(device)
post_training_dataset = SpeechDataset('./rsc/train.hdf5')
num_train_optimization_steps = int(
len(post_training_dataset) /
args.train_batch_size) * args.num_train_epochs
# Prepare optimizer
param_optimizer = list(model.named_parameters())
no_decay = ['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 = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = WarmupLinearSchedule(
optimizer,
warmup_steps=num_train_optimization_steps * 0.1,
t_total=num_train_optimization_steps)
loss_fn = nn.KLDivLoss(reduction='batchmean').to(device)
if args.fp16:
try:
from apex import amp
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use distributed and fp16 training."
)
model, optimizer = amp.initialize(model,
optimizer,
opt_level=args.fp16_opt_level)
logger.info("***** Running training *****")
logger.info(" Num orig examples = %d", len(post_training_dataset))
logger.info(" Batch size = %d", args.train_batch_size)
logger.info(" Num steps = %d", num_train_optimization_steps)
num_train_step = num_train_optimization_steps
train_dataloader = DataLoader(post_training_dataset,
batch_size=args.train_batch_size,
num_workers=16,
pin_memory=True)
model.train()
global_step = 0
epoch = 0
for _ in trange(int(args.num_train_epochs), desc="Epoch"):
iter_bar = tqdm(
train_dataloader,
desc="Train(XX Epoch) Step(XX/XX) (Mean loss=X.X) (loss=X.X)")
tr_step, total_loss, mean_loss = 0, 0., 0.
for step, batch in enumerate(iter_bar):
feature = batch['feature'].float().to(device)
label = batch['label'].float().to(device)
output = model(feature)
# loss = -F.kl_div(output, label, reduction='batchmean')
loss = loss_fn(output, label)
# if n_gpu > 1:
# loss = loss.mean()
if args.fp16:
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
torch.nn.utils.clip_grad_norm_(amp.master_params(optimizer),
args.max_grad_norm)
else:
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(),
args.max_grad_norm)
optimizer.step()
scheduler.step()
optimizer.zero_grad()
global_step += 1
tr_step += 1
total_loss += loss
mean_loss = total_loss / tr_step
iter_bar.set_description(
"Train Step(%d / %d) (Mean loss=%5.5f) (loss=%5.5f)" %
(global_step, num_train_step, mean_loss, loss.item()))
if global_step % 100 == 0:
print('output ', output)
summary_writer.add_scalar('Train/Total_Mean_Loss', mean_loss,
global_step)
summary_writer.add_scalar('Train/Total_Loss', loss.item(),
global_step)
logger.info("***** Saving file *****")
if args.resume_checkpoint:
model_checkpoint = "pt_bert_from_checkpoint_%d.bin" % (epoch)
else:
model_checkpoint = "pt_scnn_%d.bin" % (epoch)
logger.info(model_checkpoint)
output_model_file = os.path.join(args.output_dir, model_checkpoint)
# if n_gpu > 1:
# torch.save(model.module.state_dict(), output_model_file)
# else:
torch.save(model.state_dict(), output_model_file)
epoch += 1
scheduler = optim.lr_scheduler.ReduceLROnPlateau(optimizer_ft,
mode='min',
factor=0.2,
patience=3)
if lr_schedule == 'cosine':
scheduler = WarmupCosineSchedule(
optimizer_ft,
warmup_steps=2000,
t_total=int(num_epochs * len(dataloaders_dict['train'])),
cycles=1.,
last_lr=1e-4,
last_epoch=-1)
else:
scheduler = WarmupLinearSchedule(
optimizer_ft,
warmup_steps=2000,
t_total=int(num_epochs * len(dataloaders_dict['train'])),
last_epoch=-1)
criterion = nn.CrossEntropyLoss()
print(' >> Model Created And Begin Training')
# Train and evaluate
model_ft, val_hist, train_hist = \
train_model(model_ft, dataloaders_dict, criterion, optimizer_ft, scheduler, num_epochs=num_epochs, dist=args.dist)
if not os.path.exists("./model"):
os.mkdir("./model")
torch.save(
model_ft.state_dict(),
'./model/{}-{}-{}.pkl'.format(model_name, date.today(),
ext_params))
# show training result
if not args.dist or (args.dist and local_rank == 0):
def train(args, train_dataset, model, tokenizer):
""" Train the model """
tb_writer = SummaryWriter()
args.train_batch_size = args.per_gpu_train_batch_size * max(1, args.n_gpu)
train_sampler = RandomSampler(train_dataset)
train_dataloader = DataLoader(train_dataset,
sampler=train_sampler,
batch_size=args.train_batch_size)
if args.max_steps > 0:
t_total = args.max_steps
args.num_train_epochs = args.max_steps // (
len(train_dataloader) // args.gradient_accumulation_steps) + 1
else:
t_total = len(
train_dataloader
) // args.gradient_accumulation_steps * args.num_train_epochs
warm_up_steps = int(args.warmup_steps * t_total)
save_steps = int(args.save_steps * t_total)
# Prepare optimizer and schedule (linear warmup and decay)
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params': [
p for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
args.weight_decay
}, {
'params': [
p for n, p in model.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
optimizer = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=warm_up_steps,
t_total=t_total)
# multi-gpu training (should be after apex fp16 initialization)
if args.n_gpu > 1:
model = torch.nn.DataParallel(model)
# Train!
logger.info("***** Running training *****")
logger.info(" Num examples = %d", len(train_dataset))
logger.info(" Num Epochs = %d", args.num_train_epochs)
logger.info(" Instantaneous batch size per GPU = %d",
args.per_gpu_train_batch_size)
logger.info(
" Total train batch size (w. parallel, distributed & accumulation) = %d",
args.train_batch_size * args.gradient_accumulation_steps)
logger.info(" Gradient Accumulation steps = %d",
args.gradient_accumulation_steps)
logger.info(" Total optimization steps = %d", t_total)
global_step = 0
tr_loss, logging_loss = 0.0, 0.0
model.zero_grad()
train_iterator = trange(int(args.num_train_epochs), desc="Epoch")
set_seed(
args) # Added here for reproductibility (even between python 2 and 3)
for _ in train_iterator:
epoch_iterator = tqdm(train_dataloader, desc="Iteration")
for step, batch in enumerate(epoch_iterator):
model.train()
batch = tuple(t.to(args.device) for t in batch)
inputs = {
'input_ids': batch[0],
'attention_mask': batch[1],
'labels': batch[3]
}
inputs[
'token_type_ids'] = None # XLM, DistilBERT and RoBERTa don't use segment_ids
outputs = model(**inputs)
loss = outputs[0]
label_ids = torch.nn.functional.one_hot(batch[3]).float()
tsa_start = 0.5
tsa_threshold = get_tsa_threshold("exp_schedule",
global_step,
t_total,
tsa_start,
end=1)
larger_than_threshold = torch.exp(-loss) > tsa_threshold
loss_mask = torch.ones_like(label_ids) * (
1 - larger_than_threshold.float())
loss = torch.sum(loss * loss_mask) / torch.max(
torch.sum(loss_mask),
torch.tensor(1.0).cuda())
if args.n_gpu > 1:
loss = loss.mean(
) # mean() to average on multi-gpu parallel training
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
loss.backward()
tr_loss += loss.item()
if (step + 1) % args.gradient_accumulation_steps == 0:
torch.nn.utils.clip_grad_norm_(model.parameters(),
args.max_grad_norm)
optimizer.step()
scheduler.step() # Update learning rate schedule
model.zero_grad()
global_step += 1
if args.logging_steps > 0 and global_step % args.logging_steps == 0:
# Log metrics
tb_writer.add_scalar('lr',
scheduler.get_lr()[0], global_step)
tb_writer.add_scalar('loss', (tr_loss - logging_loss) /
args.logging_steps, global_step)
logging_loss = tr_loss
if save_steps > 0 and global_step % save_steps == 0:
# Save model checkpoint
if args.evaluate_during_training: # Only evaluate when single GPU otherwise metrics may not average well
results = evaluate(args, model, tokenizer)
for key, value in results.items():
tb_writer.add_scalar('eval_{}'.format(key), value,
global_step)
output_dir = os.path.join(
args.output_dir, 'checkpoint-{}'.format(global_step))
if not os.path.exists(output_dir):
os.makedirs(output_dir)
model_to_save = model.module if hasattr(
model, 'module'
) else model # Take care of distributed/parallel training
model_to_save.save_pretrained(output_dir)
torch.save(args,
os.path.join(output_dir, 'training_args.bin'))
logger.info("Saving model checkpoint to %s", output_dir)
if args.max_steps > 0 and global_step > args.max_steps:
epoch_iterator.close()
break
if args.max_steps > 0 and global_step > args.max_steps:
train_iterator.close()
break
tb_writer.close()
return global_step, tr_loss / global_step
