def train(model,
loader_train,
loader_valid,
num_train_epochs=70,
x_for_rouge=None,
x_sent_align=None,
optim='adam',
learning_rate=3e-5,
unchanged_limit=20,
weights=None,
ofp_fname='PLT',
batch_ids=None):
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
model.to(device)
rouge_sys_sent_path = 'data.nosync/rouge_sent/' + ofp_fname + '/'
rouge_sys_segs_path = 'data.nosync/rouge_segs/' + ofp_fname + '/'
output_model_file = 'saved_models/' + ofp_fname
output_config_file = 'saved_configs/' + ofp_fname
if not os.path.exists(rouge_sys_sent_path):
os.mkdir(rouge_sys_sent_path)
if not os.path.exists(rouge_sys_segs_path):
os.mkdir(rouge_sys_segs_path)
if not os.path.exists('saved_models'):
os.mkdir('saved_models')
if not os.path.exists('saved_configs'):
os.mkdir('saved_configs')
if optim == 'sgd':
optimizer = torch.optim.SGD(model.parameters(),
lr=learning_rate,
weight_decay=0.01)
else:
optimizer = BertAdam(model.parameters(), lr=learning_rate)
model.train()
loss_ls, loss_ls_s, loss_ls_qa, loss_valid_ls = [], [], [], []
qa_acc, qa_f1, sent_acc, sent_f1 = [], [], [], []
acc_loss, acc_loss_s, acc_loss_qa = [], [], []
best_qa_f1, best_sent_f1 = None, None
best_valid = 1e3
unchanged = 0
if weights is not None:
weights = torch.tensor([weights, 1.0], dtype=torch.float32).to(device)
cur_used_ls_mean, total_used, total_s, mean_seg_len = None, None, None, None
for _ in trange(num_train_epochs, desc="Epoch"):
for step, batch in enumerate(tqdm(loader_train, desc="Iteration")):
optimizer.zero_grad()
batch = tuple(t.to(device) for t in batch)
input_ids, input_mask, start_positions, end_position, sent_labels, seg_ids = batch
loss, loss_s, loss_q = model(input_ids,
seg_ids,
input_mask,
sent_labels,
start_positions,
end_position,
weights,
train=True)
loss.backward()
optimizer.step()
acc_loss.append(loss.cpu().data.numpy())
acc_loss_s.append(loss_s.cpu().data.numpy())
acc_loss_qa.append(loss_q.cpu().data.numpy())
if (step + 1) % 10000 == 0:
loss_ls.append(np.mean(acc_loss))
loss_ls_s.append(np.mean(acc_loss_s))
loss_ls_qa.append(np.mean(acc_loss_qa))
acc_loss, acc_loss_s, acc_loss_qa = [], [], []
with torch.no_grad():
eval_gt_start, eval_gt_end, eval_gt_sent = [], [], []
eval_sys_start, eval_sys_end, eval_sys_sent = [], [], []
valid_ls = []
for _, batch_valid in enumerate(
tqdm(loader_valid, desc="Validation")):
batch_valid = tuple(
t2.to(device) for t2 in batch_valid)
input_ids, input_mask, start_positions, end_position, sent_labels, seg_ids = batch_valid
start_l, end_l, sent_l, valid_l = model(
input_ids, seg_ids, input_mask, sent_labels,
start_positions, end_position, None)
eval_gt_start.extend(
start_positions.cpu().data.numpy())
eval_gt_end.extend(end_position.cpu().data.numpy())
eval_gt_sent.extend(sent_labels.cpu().data.numpy())
eval_sys_start.extend(start_l.cpu().data.numpy())
eval_sys_end.extend(end_l.cpu().data.numpy())
eval_sys_sent.extend(sent_l.cpu().data.numpy())
valid_ls.append(valid_l.cpu().data.numpy())
qa_acc_val, qa_f1_val, sent_acc_val, sent_f1_val = get_valid_evaluation(
eval_gt_start, eval_gt_end, eval_gt_sent,
eval_sys_start, eval_sys_end, eval_sys_sent)
avg_val_loss = np.mean(valid_ls)
qa_acc.append(qa_acc_val)
qa_f1.append(qa_f1_val)
sent_acc.append(sent_acc_val)
sent_f1.append(sent_f1_val)
loss_valid_ls.append(avg_val_loss)
if avg_val_loss < best_valid:
best_valid = avg_val_loss
unchanged = 0
best_qa_f1 = qa_f1_val
best_sent_f1 = sent_f1_val
cur_used_ls_mean, total_used, total_s, mean_seg_len, _ = create_valid_rouge(
x_for_rouge, eval_sys_sent, eval_sys_start,
eval_sys_end, eval_gt_sent, eval_gt_start,
eval_gt_end, batch_ids, x_sent_align,
rouge_sys_sent_path, rouge_sys_segs_path,
ofp_fname)
torch.save(model, output_model_file)
elif unchanged > unchanged_limit:
create_metric_figure(ofp_fname, loss_ls, loss_ls_s,
loss_ls_qa, loss_valid_ls, qa_f1,
sent_f1, cur_used_ls_mean,
total_used, total_s, mean_seg_len,
best_qa_f1, best_sent_f1)
return
else:
unchanged += 1
create_metric_figure(ofp_fname, loss_ls, loss_ls_s, loss_ls_qa,
loss_valid_ls, qa_f1, sent_f1, cur_used_ls_mean,
total_used, total_s, mean_seg_len, best_qa_f1,
best_sent_f1)
class DualTrainer(object):
def __init__(self, qa_model_path, ca2q_model_path, c2q_model_path, c2a_model_path):
self.tokenizer = BertTokenizer.from_pretrained("bert-base-uncased")
self.model = DualNet(qa_model_path, ca2q_model_path, c2q_model_path, c2a_model_path)
train_dir = os.path.join("./save", "dual")
self.save_dir = os.path.join(train_dir, "train_%d" % int(time.strftime("%m%d%H%M%S")))
# read data-set and prepare iterator
self.train_loader = self.get_data_loader("./squad/train-v1.1.json")
self.dev_loader = self.get_data_loader("./squad/new_dev-v1.1.json")
num_train_optimization_steps = len(self.train_loader) * config.num_epochs
# optimizer
param_optimizer = list(self.model.qa_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}
]
self.qa_opt = BertAdam(optimizer_grouped_parameters,
lr=config.qa_lr,
warmup=config.warmup_proportion,
t_total=num_train_optimization_steps)
params = list(self.model.ca2q_model.encoder.parameters()) \
+ list(self.model.ca2q_model.decoder.parameters())
# self.qg_lr = config.lr
self.qg_opt = optim.Adam(params, config.qa_lr)
# assign model to device and wrap it with DataParallel
torch.cuda.set_device(0)
self.model.cuda()
self.model = nn.DataParallel(self.model)
def get_data_loader(self, file):
train_examples = read_squad_examples(file, is_training=True, debug=config.debug)
train_features = convert_examples_to_features(train_examples,
tokenizer=self.tokenizer,
max_seq_length=config.max_seq_len,
max_query_length=config.max_query_len,
doc_stride=128,
is_training=True)
all_c_ids = torch.tensor([f.c_ids for f in train_features], dtype=torch.long)
all_c_lens = torch.sum(torch.sign(all_c_ids), 1)
all_tag_ids = torch.tensor([f.tag_ids for f in train_features], dtype=torch.long)
all_q_ids = torch.tensor([f.q_ids for f in train_features], dtype=torch.long)
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_noq_start_positions = torch.tensor([f.noq_start_position for f in train_features], dtype=torch.long)
all_noq_end_positions = torch.tensor([f.noq_end_position for f in train_features], dtype=torch.long)
train_data = TensorDataset(all_c_ids, all_c_lens, all_tag_ids,
all_q_ids, all_input_ids, all_input_mask,
all_segment_ids, all_start_positions, all_end_positions,
all_noq_start_positions, all_noq_end_positions)
sampler = RandomSampler(train_data)
batch_size = int(config.batch_size / config.gradient_accumulation_steps)
train_loader = DataLoader(train_data, sampler=sampler, batch_size=batch_size)
return train_loader
def save_model(self, loss, epoch):
loss = round(loss, 3)
dir_name = os.path.join(self.save_dir, "bert_{}_{:.3f}".format(epoch, loss))
if not os.path.exists(dir_name):
os.makedirs(dir_name)
# save bert model
model_to_save = self.model.module.qa_model if hasattr(self.model, "module") else self.model.qa_model
model_file = os.path.join(dir_name, "pytorch_model.bin")
config_file = os.path.join(dir_name, "bert_config.json")
state_dict = model_to_save.state_dict()
torch.save(state_dict, model_file)
model_to_save.config.to_json_file(config_file)
# save qg model
model_to_save = self.model.module.ca2q_model if hasattr(self.model, "module") else self.model.ca2q_model
file = os.path.join(self.save_dir, "{}_{:.3f}".format(epoch, loss))
state_dict = {
"encoder_state_dict": model_to_save.encoder.state_dict(),
"decoder_state_dict": model_to_save.decoder.state_dict()
}
torch.save(state_dict, file)
def train(self):
global_step = 1
batch_num = len(self.train_loader)
best_loss = 1e10
qa_loss_lst = []
qg_loss_lst = []
for epoch in range(1, config.num_epochs + 1):
start = time.time()
for step, batch in enumerate(self.train_loader, start=1):
qa_loss, ca2q_loss = self.model(batch)
# mean() to average across multiple gpu and back-propagation
qa_loss = qa_loss.mean() / config.gradient_accumulation_steps
ca2q_loss = ca2q_loss.mean() / config.gradient_accumulation_steps
qa_loss.backward(retain_graph=True)
ca2q_loss.backward()
qa_loss_lst.append(qa_loss.detach().item())
qg_loss_lst.append(ca2q_loss.detach().item())
# clip gradient
nn.utils.clip_grad_norm_(self.model.module.ca2q_model.parameters(), config.max_grad_norm)
# update params
if step % config.gradient_accumulation_steps == 0:
self.qa_opt.step()
self.qg_opt.step()
# zero grad
self.qa_opt.zero_grad()
self.qg_opt.zero_grad()
global_step += 1
avg_qa_loss = sum(qa_loss_lst)
avg_qg_loss = sum(qg_loss_lst)
# empty list
qa_loss_lst = []
qg_loss_lst = []
msg = "{}/{} {} - ETA : {} - qa_loss: {:.2f}, ca2q_loss :{:.2f}" \
.format(step, batch_num, progress_bar(step, batch_num),
eta(start, step, batch_num),
avg_qa_loss, avg_qg_loss)
print(msg, end="\r")
val_qa_loss, val_qg_loss = self.evaluate(msg)
if val_qg_loss <= best_loss:
best_loss = val_qg_loss
self.save_model(val_qg_loss, epoch)
print("Epoch {} took {} - final loss : {:.4f} - qa_loss :{:.4f}, qg_loss :{:.4f}"
.format(epoch, user_friendly_time(time_since(start)), ca2q_loss, val_qa_loss, val_qg_loss))
def evaluate(self, msg):
self.model.module.qa_model.eval()
self.model.module.ca2q_model.eval_mode()
num_val_batches = len(self.dev_loader)
val_qa_losses = []
val_qg_losses = []
for i, val_data in enumerate(self.dev_loader, start=1):
with torch.no_grad():
val_batch_loss = self.model(val_data)
qa_loss, qg_loss = val_batch_loss
val_qa_losses.append(qa_loss.mean().item())
val_qg_losses.append(qg_loss.mean().item())
msg2 = "{} => Evaluating :{}/{}".format(msg, i, num_val_batches)
print(msg2, end="\r")
val_qa_loss = np.mean(val_qa_losses)
val_qg_loss = np.mean(val_qg_losses)
self.model.module.qa_model.train()
self.model.module.ca2q_model.train_mode()
return val_qa_loss, val_qg_loss
'best_acc_test': 0,
'best_mac_test': 0,
'best_mic_test': 0
}
for epoch in range(args.max_epoch):
print('-' * 20, 'Epoch {}'.format(epoch), '-' * 20)
start_time = time.time()
epoch_loss = []
progress = tqdm.tqdm(total=batch_num,
mininterval=1,
desc='Epoch: {}'.format(epoch))
for batch_idx in range(batch_num):
global_step += 1
progress.update(1)
optimizer.zero_grad()
batch = train_set.next_batch(label_size,
batch_size,
drop_last=True,
shuffle=True,
gpu=gpu)
(
elmos,
labels,
men_masks,
ctx_masks,
dists,
gathers,
men_ids,
) = batch
loss = model.forward(elmos, labels, men_masks, ctx_masks, dists,
class MTDNNModel(MTDNNPretrainedModel):
"""Instance of an MTDNN Model
Arguments:
MTDNNPretrainedModel {BertPretrainedModel} -- Inherited from Bert Pretrained
config {MTDNNConfig} -- MTDNN Configuration Object
pretrained_model_name {str} -- Name of the pretrained model to initial checkpoint
num_train_step {int} -- Number of steps to take each training
Raises:
RuntimeError: [description]
ImportError: [description]
Returns:
MTDNNModel -- An Instance of an MTDNN Model
"""
def __init__(
self,
config: MTDNNConfig,
task_defs: MTDNNTaskDefs,
data_processor: MTDNNDataProcess,
pretrained_model_name: str = "mtdnn-base-uncased",
test_datasets_list: list = [],
output_dir: str = "checkpoint",
):
# Input validation
assert (
config.init_checkpoint in self.supported_init_checkpoints()
), f"Initial checkpoint must be in {self.supported_init_checkpoints()}"
num_train_step = data_processor.get_num_all_batches()
decoder_opts = data_processor.get_decoder_options_list()
task_types = data_processor.get_task_types_list()
dropout_list = data_processor.get_tasks_dropout_prob_list()
loss_types = data_processor.get_loss_types_list()
kd_loss_types = data_processor.get_kd_loss_types_list()
tasks_nclass_list = data_processor.get_task_nclass_list()
# data loaders
multitask_train_dataloader = data_processor.get_train_dataloader()
dev_dataloaders_list = data_processor.get_dev_dataloaders()
test_dataloaders_list = data_processor.get_test_dataloaders()
assert decoder_opts, "Decoder options list is required!"
assert task_types, "Task types list is required!"
assert dropout_list, "Task dropout list is required!"
assert loss_types, "Loss types list is required!"
assert kd_loss_types, "KD Loss types list is required!"
assert tasks_nclass_list, "Tasks nclass list is required!"
assert (multitask_train_dataloader
), "DataLoader for multiple tasks cannot be None"
super(MTDNNModel, self).__init__(config)
# Initialize model config and update with training options
self.config = config
self.update_config_with_training_opts(
decoder_opts,
task_types,
dropout_list,
loss_types,
kd_loss_types,
tasks_nclass_list,
)
wandb.init(project='mtl-uncertainty-final',
entity='feifang24',
config=self.config.to_dict())
self.tasks = data_processor.tasks # {task_name: task_idx}
self.task_defs = task_defs
self.multitask_train_dataloader = multitask_train_dataloader
self.dev_dataloaders_list = dev_dataloaders_list
self.test_dataloaders_list = test_dataloaders_list
self.test_datasets_list = self._configure_test_ds(test_datasets_list)
self.output_dir = output_dir
self.batch_bald = BatchBALD(num_samples=10,
num_draw=500,
shuffle_prop=0.0,
reverse=True,
reduction='mean')
self.loss_weights = [None] * self.num_tasks
# Create the output_dir if it's doesn't exist
MTDNNCommonUtils.create_directory_if_not_exists(self.output_dir)
self.pooler = None
# Resume from model checkpoint
if self.config.resume and self.config.model_ckpt:
assert os.path.exists(
self.config.model_ckpt), "Model checkpoint does not exist"
logger.info(f"loading model from {self.config.model_ckpt}")
self = self.load(self.config.model_ckpt)
return
# Setup the baseline network
# - Define the encoder based on config options
# - Set state dictionary based on configuration setting
# - Download pretrained model if flag is set
# TODO - Use Model.pretrained_model() after configuration file is hosted.
if self.config.use_pretrained_model:
with MTDNNCommonUtils.download_path() as file_path:
path = pathlib.Path(file_path)
self.local_model_path = MTDNNCommonUtils.maybe_download(
url=self.
pretrained_model_archive_map[pretrained_model_name],
log=logger,
)
self.bert_model = MTDNNCommonUtils.load_pytorch_model(
self.local_model_path)
self.state_dict = self.bert_model["state"]
else:
# Set the config base on encoder type set for initial checkpoint
if config.encoder_type == EncoderModelType.BERT:
self.bert_config = BertConfig.from_dict(self.config.to_dict())
self.bert_model = BertModel.from_pretrained(
self.config.init_checkpoint)
self.state_dict = self.bert_model.state_dict()
self.config.hidden_size = self.bert_config.hidden_size
if config.encoder_type == EncoderModelType.ROBERTA:
# Download and extract from PyTorch hub if not downloaded before
self.bert_model = torch.hub.load("pytorch/fairseq",
config.init_checkpoint)
self.config.hidden_size = self.bert_model.args.encoder_embed_dim
self.pooler = LinearPooler(self.config.hidden_size)
new_state_dict = {}
for key, val in self.bert_model.state_dict().items():
if key.startswith("model.decoder.sentence_encoder"
) or key.startswith(
"model.classification_heads"):
key = f"bert.{key}"
new_state_dict[key] = val
# backward compatibility PyTorch <= 1.0.0
if key.startswith("classification_heads"):
key = f"bert.model.{key}"
new_state_dict[key] = val
self.state_dict = new_state_dict
self.updates = (self.state_dict["updates"] if self.state_dict
and "updates" in self.state_dict else 0)
self.local_updates = 0
self.train_loss = AverageMeter()
self.train_loss_by_task = [
AverageMeter() for _ in range(len(self.tasks))
]
self.network = SANBERTNetwork(
init_checkpoint_model=self.bert_model,
pooler=self.pooler,
config=self.config,
)
if self.state_dict:
self.network.load_state_dict(self.state_dict, strict=False)
self.mnetwork = (nn.DataParallel(self.network)
if self.config.multi_gpu_on else self.network)
self.total_param = sum([
p.nelement() for p in self.network.parameters() if p.requires_grad
])
# Move network to GPU if device available and flag set
if self.config.cuda:
self.network.cuda(device=self.config.cuda_device)
self.optimizer_parameters = self._get_param_groups()
self._setup_optim(self.optimizer_parameters, self.state_dict,
num_train_step)
self.para_swapped = False
self.optimizer.zero_grad()
self._setup_lossmap()
@property
def num_tasks(self):
return len(self.tasks)
def _configure_test_ds(self, test_datasets_list):
if test_datasets_list: return test_datasets_list
result = []
for task in self.task_defs.get_task_names():
if task == 'mnli':
result.append('mnli_matched')
result.append('mnli_mismatched')
else:
result.append(task)
return result
def _get_param_groups(self):
no_decay = [
"bias", "gamma", "beta", "LayerNorm.bias", "LayerNorm.weight"
]
optimizer_parameters = [
{
"params": [
p for n, p in self.network.named_parameters()
if not any(nd in n for nd in no_decay)
],
"weight_decay":
0.01,
},
{
"params": [
p for n, p in self.network.named_parameters()
if any(nd in n for nd in no_decay)
],
"weight_decay":
0.0,
},
]
return optimizer_parameters
def _setup_optim(self,
optimizer_parameters,
state_dict: dict = None,
num_train_step: int = -1):
# Setup optimizer parameters
if self.config.optimizer == "sgd":
self.optimizer = optim.SGD(
optimizer_parameters,
self.config.learning_rate,
weight_decay=self.config.weight_decay,
)
elif self.config.optimizer == "adamax":
self.optimizer = Adamax(
optimizer_parameters,
self.config.learning_rate,
warmup=self.config.warmup,
t_total=num_train_step,
max_grad_norm=self.config.grad_clipping,
schedule=self.config.warmup_schedule,
weight_decay=self.config.weight_decay,
)
elif self.config.optimizer == "radam":
self.optimizer = RAdam(
optimizer_parameters,
self.config.learning_rate,
warmup=self.config.warmup,
t_total=num_train_step,
max_grad_norm=self.config.grad_clipping,
schedule=self.config.warmup_schedule,
eps=self.config.adam_eps,
weight_decay=self.config.weight_decay,
)
# The current radam does not support FP16.
self.config.fp16 = False
elif self.config.optimizer == "adam":
self.optimizer = Adam(
optimizer_parameters,
lr=self.config.learning_rate,
warmup=self.config.warmup,
t_total=num_train_step,
max_grad_norm=self.config.grad_clipping,
schedule=self.config.warmup_schedule,
weight_decay=self.config.weight_decay,
)
else:
raise RuntimeError(
f"Unsupported optimizer: {self.config.optimizer}")
# Clear scheduler for certain optimizer choices
if self.config.optimizer in ["adam", "adamax", "radam"]:
if self.config.have_lr_scheduler:
self.config.have_lr_scheduler = False
if state_dict and "optimizer" in state_dict:
self.optimizer.load_state_dict(state_dict["optimizer"])
if self.config.fp16:
try:
global amp
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use fp16 training."
)
model, optimizer = amp.initialize(
self.network,
self.optimizer,
opt_level=self.config.fp16_opt_level)
self.network = model
self.optimizer = optimizer
if self.config.have_lr_scheduler:
if self.config.scheduler_type == "rop":
self.scheduler = ReduceLROnPlateau(self.optimizer,
mode="max",
factor=self.config.lr_gamma,
patience=3)
elif self.config.scheduler_type == "exp":
self.scheduler = ExponentialLR(self.optimizer,
gamma=self.config.lr_gamma
or 0.95)
else:
milestones = [
int(step) for step in (
self.config.multi_step_lr or "10,20,30").split(",")
]
self.scheduler = MultiStepLR(self.optimizer,
milestones=milestones,
gamma=self.config.lr_gamma)
else:
self.scheduler = None
def _setup_lossmap(self):
self.task_loss_criterion = []
for idx, cs in enumerate(self.config.loss_types):
assert cs is not None, "Loss type must be defined."
lc = LOSS_REGISTRY[cs](name=f"Loss func of task {idx}: {cs}")
self.task_loss_criterion.append(lc)
def _setup_kd_lossmap(self):
loss_types = self.config.kd_loss_types
self.kd_task_loss_criterion = []
if self.config.mkd_opt > 0:
for idx, cs in enumerate(loss_types):
assert cs, "Loss type must be defined."
lc = LOSS_REGISTRY[cs](
name="Loss func of task {}: {}".format(idx, cs))
self.kd_task_loss_criterion.append(lc)
def _to_cuda(self, tensor):
# Set tensor to gpu (non-blocking) if a PyTorch tensor
if tensor is None:
return tensor
if isinstance(tensor, list) or isinstance(tensor, tuple):
y = [
e.cuda(device=self.config.cuda_device, non_blocking=True)
for e in tensor
]
for t in y:
t.requires_grad = False
else:
y = tensor.cuda(device=self.config.cuda_device, non_blocking=True)
y.requires_grad = False
return y
def train(self):
if self.para_swapped:
self.para_swapped = False
def update(self, batch_meta, batch_data):
self.network.train()
target = batch_data[batch_meta["label"]]
soft_labels = None
task_type = batch_meta["task_type"]
target = self._to_cuda(target) if self.config.cuda else target
task_id = batch_meta["task_id"]
inputs = batch_data[:batch_meta["input_len"]]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
weight = self.loss_weights[task_id]
if self.config.weighted_on:
if self.config.cuda:
weight = batch_data[batch_meta["factor"]].cuda(
device=self.config.cuda_device, non_blocking=True)
else:
weight = batch_data[batch_meta["factor"]]
logits = self.mnetwork(*inputs)
# compute loss
loss = 0
if self.task_loss_criterion[task_id] and (target is not None):
loss = self.task_loss_criterion[task_id](logits,
target,
weight,
ignore_index=-1)
# compute kd loss
if self.config.mkd_opt > 0 and ("soft_label" in batch_meta):
soft_labels = batch_meta["soft_label"]
soft_labels = (self._to_cuda(soft_labels)
if self.config.cuda else soft_labels)
kd_lc = self.kd_task_loss_criterion[task_id]
kd_loss = (kd_lc(logits, soft_labels, weight, ignore_index=-1)
if kd_lc else 0)
loss = loss + kd_loss
self.train_loss_by_task[task_id].update(
loss.item() / (self.loss_weights[task_id]
if self.loss_weights[task_id] is not None else 1.),
batch_data[batch_meta["token_id"]].size(0))
self.train_loss.update(loss.item(),
batch_data[batch_meta["token_id"]].size(0))
# scale loss
loss = loss / (self.config.grad_accumulation_step or 1)
if self.config.fp16:
with amp.scale_loss(loss, self.optimizer) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.local_updates += 1
if self.local_updates % self.config.grad_accumulation_step == 0:
if self.config.global_grad_clipping > 0:
if self.config.fp16:
torch.nn.utils.clip_grad_norm_(
amp.master_params(self.optimizer),
self.config.global_grad_clipping,
)
else:
torch.nn.utils.clip_grad_norm_(
self.network.parameters(),
self.config.global_grad_clipping)
self.updates += 1
# reset number of the grad accumulation
self.optimizer.step()
self.optimizer.zero_grad()
def eval_mode(self,
data: DataLoader,
metric_meta,
use_cuda=True,
with_label=True,
label_mapper=None,
task_type=TaskType.Classification):
eval_loss = AverageMeter()
if use_cuda:
self.cuda()
predictions = []
golds = []
scores = []
uncertainties = []
ids = []
metrics = {}
for idx, (batch_info, batch_data) in enumerate(data):
if idx % 100 == 0:
logger.info(f"predicting {idx}")
batch_info, batch_data = MTDNNCollater.patch_data(
use_cuda, batch_info, batch_data)
score, pred, gold, loss, uncertainty = self._predict_batch(
batch_info, batch_data)
predictions.extend(pred)
golds.extend(gold)
scores.extend(score)
uncertainties.extend(uncertainty)
ids.extend(batch_info["uids"])
eval_loss.update(loss.item(), len(batch_info["uids"]))
if task_type == TaskType.Span:
golds = merge_answers(ids, golds)
predictions, scores = select_answers(ids, predictions, scores)
if with_label:
metrics = calc_metrics(metric_meta, golds, predictions, scores,
label_mapper)
return metrics, predictions, scores, golds, ids, (
eval_loss.avg, eval_loss.count), np.mean(uncertainties)
def _predict_batch(self, batch_meta, batch_data):
self.network.eval()
task_id = batch_meta["task_id"]
task_type = batch_meta["task_type"]
inputs = batch_data[:batch_meta["input_len"]]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
# get logits (and val loss if we have labels)
label = batch_meta["label"]
target = batch_data[label] if type(label) is int else torch.tensor(
label)
target = self._to_cuda(target) if self.config.cuda else target
weight = None
if self.config.weighted_on:
if self.config.cuda:
weight = batch_data[batch_meta["factor"]].cuda(
device=self.config.cuda_device, non_blocking=True)
else:
weight = batch_data[batch_meta["factor"]]
score = self.mnetwork(*inputs)
if self.config.mc_dropout_samples > 0:
def apply_dropout(m):
if isinstance(m, DropoutWrapper):
m.train()
self.network.apply(apply_dropout)
mc_sample_scores = torch.stack([
self.mnetwork(*inputs)
for _ in range(self.config.mc_dropout_samples)
], -1)
mc_sample_scores = F.softmax(mc_sample_scores,
dim=1).data.cpu().numpy()
uncertainty = self.batch_bald.get_uncertainties(mc_sample_scores)
else:
uncertainty = 1.0
loss = None
if self.task_loss_criterion[task_id] and (target is not None):
loss = self.task_loss_criterion[task_id](score,
target,
weight,
ignore_index=-1)
if task_type == TaskType.Ranking:
score = score.contiguous().view(-1, batch_meta["pairwise_size"])
assert task_type == TaskType.Ranking
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.zeros(score.shape, dtype=int)
positive = np.argmax(score, axis=1)
for idx, pos in enumerate(positive):
predict[idx, pos] = 1
predict = predict.reshape(-1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta["true_label"], loss
elif task_type == TaskType.SequenceLabeling:
mask = batch_data[batch_meta["mask"]]
score = score.contiguous()
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).reshape(mask.size()).tolist()
valied_lenght = mask.sum(1).tolist()
final_predict = []
for idx, p in enumerate(predict):
final_predict.append(p[:valied_lenght[idx]])
score = score.reshape(-1).tolist()
return score, final_predict, batch_meta["label"], loss
elif task_type == TaskType.Span:
start, end = score
predictions = []
if self.config.encoder_type == EncoderModelType.BERT:
scores, predictions = extract_answer(
batch_meta,
batch_data,
start,
end,
self.config.get("max_answer_len", 5),
)
return scores, predictions, batch_meta["answer"], loss
else:
if task_type == TaskType.Classification:
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta["label"], loss, uncertainty
def _rerank_batches(self,
batches,
start_idx,
task_id_to_weights,
softmax_task_weights=False):
def weights_to_probs(weights):
if softmax_task_weights:
probs = softmax(weights)
else:
probs = weights / np.sum(weights)
return probs
# reshuffle all batches; sort them by task_id
new_batches = [list(self.multitask_train_dataloader) for _ in range(5)]
for i in range(len(new_batches)):
random.shuffle(new_batches[i]) # this line somehow helps?
new_batches = [b for batches in new_batches
for b in batches] # flatten
task_id_by_batch = [
batch_meta["task_id"] for batch_meta, _ in new_batches
]
batches_by_task = [[] for _ in range(self.num_tasks)]
for batch_idx, task_id in enumerate(task_id_by_batch):
batches_by_task[task_id].append(batch_idx)
task_probs = weights_to_probs(task_id_to_weights)
# multiply weight by num batches per task
# task_probs = weights_to_probs(task_id_to_weights * np.asarray([len(batches) for batches in batches_by_task])) # comment out as see fit
if self.config.uncertainty_based_weight:
rel_loss_weights = (1. / task_id_to_weights)
self.loss_weights = (rel_loss_weights * self.num_tasks / np.sum(rel_loss_weights)) * \
(np.mean(self.dev_loss_by_task) / self.dev_loss_by_task)
# self.loss_weights = rel_loss_weights * np.mean(task_id_to_weights)
num_batches = len(batches[start_idx:])
# sample num_batches many tasks w/ replacement
task_indices_sampled = np.random.choice(self.num_tasks,
num_batches,
replace=True,
p=task_probs)
reranked_batches = [None] * num_batches
counters = [0] * self.num_tasks
for i, task_id in enumerate(task_indices_sampled):
batch_idx = batches_by_task[task_id][counters[task_id] %
len(batches_by_task[task_id])]
counters[task_id] += 1
reranked_batches[i] = new_batches[batch_idx]
weights_by_task_name = {}
for task_name, task_id in self.tasks.items():
weights_by_task_name[f'task_weight/{task_name}'] = task_probs[
task_id]
return [None] * start_idx + reranked_batches, weights_by_task_name
def fit(self, epochs=0):
""" Fit model to training datasets """
epochs = epochs or self.config.epochs
logger.info(f"Total number of params: {self.total_param}")
FIRST_STEP_TO_LOG = 10
for epoch in range(1, epochs + 1):
logger.info(f"At epoch {epoch}")
logger.info(
f"Amount of data to go over: {len(self.multitask_train_dataloader)}"
)
start = datetime.now()
# Create batches and train
batches = list(self.multitask_train_dataloader)
if self.config.uncertainty_based_sampling and epoch > 1:
batches, weights_by_task_name = self._rerank_batches(
batches,
start_idx=0,
task_id_to_weights=self.smoothed_uncertainties_by_task)
for idx in range(len(batches)):
batch_meta, batch_data = batches[idx]
batch_meta, batch_data = MTDNNCollater.patch_data(
self.config.cuda, batch_meta, batch_data)
task_id = batch_meta["task_id"]
self.update(batch_meta, batch_data)
if (self.local_updates == FIRST_STEP_TO_LOG
or (self.local_updates) %
(self.config.log_per_updates *
self.config.grad_accumulation_step) == 0):
time_left = str((datetime.now() - start) / (idx + 1) *
(len(self.multitask_train_dataloader) -
idx - 1)).split(".")[0]
logger.info(
"Updates - [{0:6}] Training Loss - [{1:.5f}] Time Remaining - [{2}]"
.format(self.updates, self.train_loss.avg, time_left))
val_logs, uncertainties_by_task = self._eval(
epoch, save_scores=False, eval_type='dev')
test_logs, _ = self._eval(epoch,
save_scores=False,
eval_type='test')
if self.local_updates == FIRST_STEP_TO_LOG:
weights_by_task_name = {
f'task_weight/{task_name}': 1.0
for task_name in self.tasks
}
else:
if self.local_updates == self.config.log_per_updates * self.config.grad_accumulation_step:
self.smoothed_uncertainties_by_task = uncertainties_by_task
self.initial_train_loss_by_task = np.asarray(
[loss.avg for loss in self.train_loss_by_task])
else:
alpha = self.config.smooth_uncertainties
self.smoothed_uncertainties_by_task = alpha * self.smoothed_uncertainties_by_task + \
(1 - alpha) * uncertainties_by_task
if self.config.uncertainty_based_sampling and idx < len(
batches) - 1:
batches, weights_by_task_name = self._rerank_batches(
batches,
start_idx=idx + 1,
task_id_to_weights=self.
smoothed_uncertainties_by_task)
if self.config.rate_based_weight:
current_train_loss_by_task = np.asarray(
[loss.avg for loss in self.train_loss_by_task])
rate_of_training_by_task = current_train_loss_by_task / self.initial_train_loss_by_task
self.loss_weights = (rate_of_training_by_task / np.mean(rate_of_training_by_task)) * \
(np.mean(current_train_loss_by_task) / current_train_loss_by_task)
self._log_training({
**val_logs,
**test_logs,
**weights_by_task_name
})
if self.config.save_per_updates_on and (
(self.local_updates) %
(self.config.save_per_updates *
self.config.grad_accumulation_step) == 0):
model_file = os.path.join(
self.output_dir,
"model_{}_{}.pt".format(epoch, self.updates),
)
logger.info(f"Saving mt-dnn model to {model_file}")
self.save(model_file)
# Eval and save checkpoint after each epoch
logger.info('=' * 5 + f' End of EPOCH {epoch} ' + '=' * 5)
logger.info(f'Train loss (epoch avg): {self.train_loss.avg}')
val_logs, uncertainties_by_task = self._eval(epoch,
save_scores=True,
eval_type='dev')
test_logs, _ = self._eval(epoch,
save_scores=True,
eval_type='test')
self._log_training({
**val_logs,
**test_logs,
**weights_by_task_name
})
# model_file = os.path.join(self.output_dir, "model_{}.pt".format(epoch))
# logger.info(f"Saving mt-dnn model to {model_file}")
# self.save(model_file)
def _eval(self, epoch, save_scores, eval_type='dev'):
if eval_type not in {'dev', 'test'}:
raise ValueError(
"eval_type must be one of the following: 'dev' or 'test'.")
is_dev = eval_type == 'dev'
log_dict = {}
loss_agg = AverageMeter()
loss_by_task = {}
uncertainties_by_task = {}
for idx, dataset in enumerate(self.test_datasets_list):
logger.info(
f"Evaluating on {eval_type} ds {idx}: {dataset.upper()}")
prefix = dataset.split("_")[0]
results = self._predict(idx,
prefix,
dataset,
eval_type=eval_type,
saved_epoch_idx=epoch,
save_scores=save_scores)
avg_loss = results['avg_loss']
num_samples = results['num_samples']
loss_agg.update(avg_loss, n=num_samples)
loss_by_task[dataset] = avg_loss
if is_dev:
logger.info(
f"Task {dataset} -- {eval_type} loss: {avg_loss:.3f}")
metrics = results['metrics']
for key, val in metrics.items():
if is_dev:
logger.info(
f"Task {dataset} -- {eval_type} {key}: {val:.3f}")
log_dict[f'{dataset}/{eval_type}_{key}'] = val
uncertainty = results['uncertainty']
if is_dev:
logger.info(
f"Task {dataset} -- {eval_type} uncertainty: {uncertainty:.3f}"
)
log_dict[
f'{eval_type}_uncertainty_by_task/{dataset}'] = uncertainty
if prefix not in uncertainties_by_task:
uncertainties_by_task[prefix] = uncertainty
else:
# exploiting the fact that only mnli has two dev sets
uncertainties_by_task[prefix] += uncertainty
uncertainties_by_task[prefix] /= 2
if is_dev: logger.info(f'{eval_type} loss: {loss_agg.avg}')
log_dict[f'{eval_type}_loss'] = loss_agg.avg
log_dict.update({
f'{eval_type}_loss_by_task/{task}': loss
for task, loss in loss_by_task.items()
})
loss_by_task_id = [None] * self.num_tasks
for task_name, loss in loss_by_task.items():
loss_by_task_id[self.tasks[task_name]] = loss
loss_by_task_id = np.asarray(loss_by_task_id)
if is_dev:
self.dev_loss_by_task = loss_by_task_id
else:
self.test_loss_by_task = loss_by_task_id
# convert uncertainties_by_task from dict to list, where list[i] = weight of task_id i
uncertainties_by_task_id = [None] * self.num_tasks
for task_name, weight in uncertainties_by_task.items():
task_id = self.tasks[task_name]
uncertainties_by_task_id[task_id] = weight
uncertainties_by_task_id = np.asarray(uncertainties_by_task_id)
return log_dict, uncertainties_by_task_id
def _log_training(self, val_logs):
train_loss_by_task = {
f'train_loss_by_task/{task}': self.train_loss_by_task[task_idx].avg
for task, task_idx in self.tasks.items()
}
train_loss_agg = {'train_loss': self.train_loss.avg}
loss_weights_by_task = {}
if self.config.uncertainty_based_weight or self.config.rate_based_weight:
for task_name, task_id in self.tasks.items():
loss_weights_by_task[
f'loss_weight/{task_name}'] = self.loss_weights[
task_id] if self.loss_weights[
task_id] is not None else 1.
log_dict = {
'global_step': self.updates,
**train_loss_by_task,
**train_loss_agg,
**val_logs,
**loss_weights_by_task
}
wandb.log(log_dict)
def _predict(self,
eval_ds_idx,
eval_ds_prefix,
eval_ds_name,
eval_type='dev',
saved_epoch_idx=None,
save_scores=True):
if eval_type not in {'dev', 'test'}:
raise ValueError(
"eval_type must be one of the following: 'dev' or 'test'.")
is_dev = eval_type == 'dev'
label_dict = self.task_defs.global_map.get(eval_ds_prefix, None)
if is_dev:
data: DataLoader = self.dev_dataloaders_list[eval_ds_idx]
else:
data: DataLoader = self.test_dataloaders_list[eval_ds_idx]
if data is None:
results = None
else:
with torch.no_grad():
(
metrics,
predictions,
scores,
golds,
ids,
(eval_ds_avg_loss, eval_ds_num_samples),
uncertainty,
) = self.eval_mode(
data,
metric_meta=self.task_defs.metric_meta_map[eval_ds_prefix],
use_cuda=self.config.cuda,
with_label=True,
label_mapper=label_dict,
task_type=self.task_defs.task_type_map[eval_ds_prefix])
results = {
"metrics": metrics,
"predictions": predictions,
"uids": ids,
"scores": scores,
"uncertainty": uncertainty
}
if save_scores:
score_file_prefix = f"{eval_ds_name}_{eval_type}_scores" \
+ (f'_{saved_epoch_idx}' if saved_epoch_idx is not None else "")
score_file = os.path.join(self.output_dir,
score_file_prefix + ".json")
MTDNNCommonUtils.dump(score_file, results)
if self.config.use_glue_format:
official_score_file = os.path.join(
self.output_dir, score_file_prefix + ".tsv")
submit(official_score_file, results, label_dict)
results.update({
"avg_loss": eval_ds_avg_loss,
"num_samples": eval_ds_num_samples
})
return results
def predict(self, trained_model_chckpt: str = None):
"""
Inference of model on test datasets
"""
# Load a trained checkpoint if a valid model checkpoint
if trained_model_chckpt and gfile.exists(trained_model_chckpt):
logger.info(
f"Running predictions using: {trained_model_chckpt}. This may take 3 minutes."
)
self.load(trained_model_chckpt)
logger.info("Checkpoint loaded.")
self.config.batch_size_eval = 128
self.config.use_glue_format = True
# test eval
for idx, dataset in enumerate(self.test_datasets_list):
prefix = dataset.split("_")[0]
results = self._predict(idx, prefix, dataset, eval_type='test')
if results:
logger.info(f"[new test scores saved for {dataset}.]")
else:
logger.info(f"Data not found for {dataset}.")
def extract(self, batch_meta, batch_data):
self.network.eval()
# 'token_id': 0; 'segment_id': 1; 'mask': 2
inputs = batch_data[:3]
all_encoder_layers, pooled_output = self.mnetwork.bert(*inputs)
return all_encoder_layers, pooled_output
def save(self, filename):
network_state = dict([(k, v.cpu())
for k, v in self.network.state_dict().items()])
params = {
"state": network_state,
"optimizer": self.optimizer.state_dict(),
"config": self.config,
}
torch.save(params, gfile.GFile(filename, mode='wb'))
logger.info("model saved to {}".format(filename))
def load(self, checkpoint):
model_state_dict = torch.load(gfile.GFile(checkpoint, mode='rb'))
self.network.load_state_dict(model_state_dict["state"], strict=False)
self.optimizer.load_state_dict(model_state_dict["optimizer"])
self.config = model_state_dict["config"]
def cuda(self):
self.network.cuda(device=self.config.cuda_device)
def supported_init_checkpoints(self):
"""List of allowed check points
"""
return [
"bert-base-uncased",
"bert-base-cased",
"bert-large-uncased",
"mtdnn-base-uncased",
"mtdnn-large-uncased",
"roberta.base",
"roberta.large",
]
def update_config_with_training_opts(
self,
decoder_opts,
task_types,
dropout_list,
loss_types,
kd_loss_types,
tasks_nclass_list,
):
# Update configurations with options obtained from preprocessing training data
setattr(self.config, "decoder_opts", decoder_opts)
setattr(self.config, "task_types", task_types)
setattr(self.config, "tasks_dropout_p", dropout_list)
setattr(self.config, "loss_types", loss_types)
setattr(self.config, "kd_loss_types", kd_loss_types)
setattr(self.config, "tasks_nclass_list", tasks_nclass_list)
def finetune(self, clean_file, corrupt_file, data_dir="", validation_split=0.2, n_epochs=2, new_vocab_list=[]):
if new_vocab_list:
raise NotImplementedError("Do not currently support modifying output vocabulary of the models")
# load data and split in train-validation
data_dir = DEFAULT_TRAINTEST_DATA_PATH if data_dir == "default" else data_dir
train_data = load_data(data_dir, clean_file, corrupt_file)
train_data, valid_data = train_validation_split(train_data, 0.8, seed=11690)
print("len of train and test data: ", len(train_data), len(valid_data))
# load vocab and model
self.__model_status()
# finetune
#############################################
# training and validation
#############################################
model, vocab = self.model, self.vocab
TRAIN_BATCH_SIZE, VALID_BATCH_SIZE = 16, 32
GRADIENT_ACC = 4
DEVICE = self.device
START_EPOCH, N_EPOCHS = 0, n_epochs
CHECKPOINT_PATH = os.path.join(data_dir, "new_models", os.path.split(self.bert_pretrained_name_or_path)[-1])
if os.path.exists(CHECKPOINT_PATH):
num = 1
while True:
NEW_CHECKPOINT_PATH = CHECKPOINT_PATH + f"-{num}"
if not os.path.exists(NEW_CHECKPOINT_PATH):
break
num += 1
CHECKPOINT_PATH = NEW_CHECKPOINT_PATH
VOCAB_PATH = os.path.join(CHECKPOINT_PATH, "vocab.pkl")
if not os.path.exists(CHECKPOINT_PATH):
os.makedirs(CHECKPOINT_PATH)
print(f"CHECKPOINT_PATH: {CHECKPOINT_PATH}")
# running stats
max_dev_acc, argmax_dev_acc = -1, -1
patience = 100
# Create an 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}
]
t_total = int(len(train_data) / TRAIN_BATCH_SIZE / GRADIENT_ACC * N_EPOCHS)
if t_total == 0:
t_total = 1
optimizer = BertAdam(optimizer_grouped_parameters, lr=5e-5, warmup=0.1, t_total=t_total)
# model to device
model.to(DEVICE)
# load parameters if not training from scratch
if START_EPOCH > 1:
progress_write_file = (
open(os.path.join(CHECKPOINT_PATH, f"progress_retrain_from_epoch{START_EPOCH}.txt"), 'w')
)
model, optimizer, max_dev_acc, argmax_dev_acc = load_pretrained(model, CHECKPOINT_PATH, optimizer=optimizer)
progress_write_file.write(f"Training model params after loading from path: {CHECKPOINT_PATH}\n")
else:
progress_write_file = open(os.path.join(CHECKPOINT_PATH, "progress.txt"), 'w')
print(f"Training model params")
progress_write_file.write(f"Training model params\n")
progress_write_file.flush()
# train and eval
for epoch_id in range(START_EPOCH, N_EPOCHS + 1):
# check for patience
if (epoch_id - argmax_dev_acc) > patience:
print("patience count reached. early stopping initiated")
print("max_dev_acc: {}, argmax_dev_acc: {}".format(max_dev_acc, argmax_dev_acc))
break
# print epoch
print(f"In epoch: {epoch_id}")
progress_write_file.write(f"In epoch: {epoch_id}\n")
progress_write_file.flush()
# train loss and backprop
train_loss = 0.
train_acc = 0.
train_acc_count = 0.
print("train_data size: {}".format(len(train_data)))
progress_write_file.write("train_data size: {}\n".format(len(train_data)))
progress_write_file.flush()
train_data_iter = batch_iter(train_data, batch_size=TRAIN_BATCH_SIZE, shuffle=True)
nbatches = int(np.ceil(len(train_data) / TRAIN_BATCH_SIZE))
optimizer.zero_grad()
for batch_id, (batch_labels, batch_sentences) in enumerate(train_data_iter):
st_time = time.time()
# set batch data for bert
batch_labels_, batch_sentences_, batch_bert_inp, batch_bert_splits = \
bert_tokenize_for_valid_examples(batch_labels, batch_sentences, self.bert_pretrained_name_or_path)
if len(batch_labels_) == 0:
print("################")
print("Not training the following lines due to pre-processing mismatch: \n")
print([(a, b) for a, b in zip(batch_labels, batch_sentences)])
print("################")
continue
else:
batch_labels, batch_sentences = batch_labels_, batch_sentences_
batch_bert_inp = {k: v.to(DEVICE) for k, v in batch_bert_inp.items()}
# set batch data for others
batch_labels, batch_lengths = labelize(batch_labels, vocab)
# batch_lengths = batch_lengths.to(device)
batch_labels = batch_labels.to(DEVICE)
# forward
model.train()
loss = model(batch_bert_inp, batch_bert_splits, targets=batch_labels)
batch_loss = loss.cpu().detach().numpy()
train_loss += batch_loss
# backward
if GRADIENT_ACC > 1:
loss = loss / GRADIENT_ACC
loss.backward()
# step
if (batch_id + 1) % GRADIENT_ACC == 0 or batch_id >= nbatches - 1:
# torch.nn.utils.clip_grad_norm_(model.parameters(), 1.0)
optimizer.step()
# scheduler.step()
optimizer.zero_grad()
# compute accuracy in numpy
if batch_id % 10000 == 0:
train_acc_count += 1
model.eval()
with torch.no_grad():
_, batch_predictions = model(batch_bert_inp, batch_bert_splits, targets=batch_labels)
model.train()
batch_labels = batch_labels.cpu().detach().numpy()
batch_lengths = batch_lengths.cpu().detach().numpy()
ncorr, ntotal = batch_accuracy_func(batch_predictions, batch_labels, batch_lengths)
batch_acc = ncorr / ntotal
train_acc += batch_acc
# update progress
progressBar(batch_id + 1,
int(np.ceil(len(train_data) / TRAIN_BATCH_SIZE)),
["batch_time", "batch_loss", "avg_batch_loss", "batch_acc", "avg_batch_acc"],
[time.time() - st_time, batch_loss, train_loss / (batch_id + 1), batch_acc,
train_acc / train_acc_count])
if batch_id == 0 or (batch_id + 1) % 5000 == 0:
nb = int(np.ceil(len(train_data) / TRAIN_BATCH_SIZE))
progress_write_file.write(f"{batch_id + 1}/{nb}\n")
progress_write_file.write(
f"batch_time: {time.time() - st_time}, avg_batch_loss: {train_loss / (batch_id + 1)}, "
f"avg_batch_acc: {train_acc / train_acc_count}\n")
progress_write_file.flush()
print(f"\nEpoch {epoch_id} train_loss: {train_loss / (batch_id + 1)}")
# valid loss
valid_loss = 0.
valid_acc = 0.
print("valid_data size: {}".format(len(valid_data)))
progress_write_file.write("valid_data size: {}\n".format(len(valid_data)))
progress_write_file.flush()
valid_data_iter = batch_iter(valid_data, batch_size=VALID_BATCH_SIZE, shuffle=False)
for batch_id, (batch_labels, batch_sentences) in enumerate(valid_data_iter):
st_time = time.time()
# set batch data for bert
batch_labels_, batch_sentences_, batch_bert_inp, batch_bert_splits = \
bert_tokenize_for_valid_examples(batch_labels, batch_sentences, self.bert_pretrained_name_or_path)
if len(batch_labels_) == 0:
print("################")
print("Not validating the following lines due to pre-processing mismatch: \n")
print([(a, b) for a, b in zip(batch_labels, batch_sentences)])
print("################")
continue
else:
batch_labels, batch_sentences = batch_labels_, batch_sentences_
batch_bert_inp = {k: v.to(DEVICE) for k, v in batch_bert_inp.items()}
# set batch data for others
batch_labels, batch_lengths = labelize(batch_labels, vocab)
# batch_lengths = batch_lengths.to(device)
batch_labels = batch_labels.to(DEVICE)
# forward
model.eval()
with torch.no_grad():
batch_loss, batch_predictions = model(batch_bert_inp, batch_bert_splits, targets=batch_labels)
model.train()
valid_loss += batch_loss
# compute accuracy in numpy
batch_labels = batch_labels.cpu().detach().numpy()
batch_lengths = batch_lengths.cpu().detach().numpy()
ncorr, ntotal = batch_accuracy_func(batch_predictions, batch_labels, batch_lengths)
batch_acc = ncorr / ntotal
valid_acc += batch_acc
# update progress
progressBar(batch_id + 1,
int(np.ceil(len(valid_data) / VALID_BATCH_SIZE)),
["batch_time", "batch_loss", "avg_batch_loss", "batch_acc", "avg_batch_acc"],
[time.time() - st_time, batch_loss, valid_loss / (batch_id + 1), batch_acc,
valid_acc / (batch_id + 1)])
if batch_id == 0 or (batch_id + 1) % 2000 == 0:
nb = int(np.ceil(len(valid_data) / VALID_BATCH_SIZE))
progress_write_file.write(f"{batch_id}/{nb}\n")
progress_write_file.write(
f"batch_time: {time.time() - st_time}, avg_batch_loss: {valid_loss / (batch_id + 1)}, "
f"avg_batch_acc: {valid_acc / (batch_id + 1)}\n")
progress_write_file.flush()
print(f"\nEpoch {epoch_id} valid_loss: {valid_loss / (batch_id + 1)}")
# save model, optimizer and test_predictions if val_acc is improved
if valid_acc >= max_dev_acc:
print(f"validation accuracy improved from {max_dev_acc:.4f} to {valid_acc:.4f}")
# name = "model.pth.tar".format(epoch_id)
# torch.save({
# 'epoch_id': epoch_id,
# 'max_dev_acc': max_dev_acc,
# 'argmax_dev_acc': argmax_dev_acc,
# 'model_state_dict': model.state_dict(),
# 'optimizer_state_dict': optimizer.state_dict()},
# os.path.join(CHECKPOINT_PATH, name))
name = "pytorch_model.bin"
torch.save(model.state_dict(), os.path.join(CHECKPOINT_PATH, name))
print("Model saved at {} in epoch {}".format(os.path.join(CHECKPOINT_PATH, name), epoch_id))
save_vocab_dict(VOCAB_PATH, vocab)
# re-assign
max_dev_acc, argmax_dev_acc = valid_acc, epoch_id
print(f"Model and logs saved at {CHECKPOINT_PATH}")
return
def train_bert_cased(t_config, p_config, s_config):
device = torch.device('cuda')
seed_everything(s_config.seed)
train = pd.read_csv('../input/train.csv').sample(
t_config.num_to_load + t_config.valid_size, random_state=s_config.seed)
train = prepare_train_text(train, p_config)
train = train.fillna(0)
tokenizer = BertTokenizer.from_pretrained('bert-base-cased')
train_processed = get_tokenized_samples(t_config.MAX_SEQUENCE_LENGTH,
tokenizer, train['text_proc'])
sequences = train_processed
lengths = np.argmax(sequences == 0, axis=1)
lengths[lengths == 0] = sequences.shape[1]
MyModel = BertForSequenceClassification.from_pretrained(
'bert-base-cased', num_labels=t_config.num_labels)
MyModel.to(device)
# Prepare target
target_train = train['target'].values[:t_config.num_to_load]
target_train_aux = train[[
'severe_toxicity', 'obscene', 'identity_attack', 'insult', 'threat'
]].values[:t_config.num_to_load]
target_train_identity = train[identity_columns].values[:t_config.
num_to_load]
target_val = train['target'].values[t_config.num_to_load:]
target_val_aux = train[[
'severe_toxicity', 'obscene', 'identity_attack', 'insult', 'threat'
]].values[t_config.num_to_load:]
target_val_identity = train[identity_columns].values[t_config.num_to_load:]
# Prepare training data
inputs_train = train_processed[:t_config.num_to_load]
inputs_val = train_processed[t_config.num_to_load:]
weight_train = train['weight'].values[:t_config.num_to_load]
weight_val = train['weight'].values[t_config.num_to_load:]
lengths_train = lengths[:t_config.num_to_load]
lengths_val = lengths[t_config.num_to_load:]
inputs_train = torch.tensor(inputs_train, dtype=torch.int64)
Target_train = torch.Tensor(target_train)
Target_train_aux = torch.Tensor(target_train_aux)
Target_train_identity = torch.Tensor(target_train_identity)
weight_train = torch.Tensor(weight_train)
Lengths_train = torch.tensor(lengths_train, dtype=torch.int64)
inputs_val = torch.tensor(inputs_val, dtype=torch.int64)
Target_val = torch.Tensor(target_val)
Target_val_aux = torch.Tensor(target_val_aux)
Target_val_identity = torch.Tensor(target_val_identity)
weight_val = torch.Tensor(weight_val)
Lengths_val = torch.tensor(lengths_val, dtype=torch.int64)
# Prepare dataset
train_dataset = data.TensorDataset(inputs_train, Target_train,
Target_train_aux, Target_train_identity,
weight_train, Lengths_train)
val_dataset = data.TensorDataset(inputs_val, Target_val, Target_val_aux,
Target_val_identity, weight_val,
Lengths_val)
# Bucket sequencing
ids_train = lengths_train.argsort(kind="stable")
ids_train_new = resort_index(ids_train, t_config.num_of_bucket,
s_config.seed)
train_loader = torch.utils.data.DataLoader(data.Subset(
train_dataset, ids_train_new),
batch_size=t_config.batch_size,
collate_fn=clip_to_max_len,
shuffle=False)
no_decay = ['bias', 'LayerNorm.bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params': [
p for n, p in list(MyModel.named_parameters())
if not any(nd in n for nd in no_decay)
],
'weight_decay':
0.01
}, {
'params': [
p for n, p in list(MyModel.named_parameters())
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
optimizer = BertAdam(optimizer_grouped_parameters,
lr=t_config.learning_rate,
betas=[0.9, 0.999],
warmup=t_config.warmup,
t_total=t_config.num_epoch * len(train_loader) //
t_config.accumulation_steps)
i = 0
for n, p in list(MyModel.named_parameters()):
if i < 10:
p.requires_grad = False
i += 1
p = train['target'].mean()
likelihood = np.log(p / (1 - p))
model_bias = torch.tensor(likelihood).type(torch.float)
MyModel.classifier.bias = nn.Parameter(model_bias.to(device))
MyModel, optimizer = amp.initialize(MyModel,
optimizer,
opt_level="O1",
verbosity=0)
for epoch in range(t_config.num_epoch):
i = 0
print('Training start')
optimizer.zero_grad()
MyModel.train()
for batch_idx, (input, target, target_aux, target_identity,
sample_weight) in tqdm_notebook(
enumerate(train_loader), total=len(train_loader)):
y_pred = MyModel(
input.to(device),
attention_mask=(input > 0).to(device),
)
loss = F.binary_cross_entropy_with_logits(y_pred[0][:, 0],
target.to(device),
reduction='none')
loss = (loss * sample_weight.to(device)).sum() / (
sample_weight.sum().to(device))
loss_aux = F.binary_cross_entropy_with_logits(
y_pred[0][:, 1:6], target_aux.to(device),
reduction='none').mean(axis=1)
loss_aux = (loss_aux * sample_weight.to(device)).sum() / (
sample_weight.sum().to(device))
loss += loss_aux
if t_config.num_labels == 15:
loss_identity = F.binary_cross_entropy_with_logits(
y_pred[0][:, 6:],
target_identity.to(device),
reduction='none').mean(axis=1)
loss_identity = (loss_identity * sample_weight.to(device)
).sum() / (sample_weight.sum().to(device))
loss += loss_identity
# Use apex for better gradients and smaller model sizes
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
# Use accumulation steps to tune the effective batch size of training
if (i + 1) % t_config.accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
i += 1
torch.save(
{
'model_state_dict': MyModel.state_dict(),
'optimizer_state_dict': optimizer.state_dict(),
}, f'{t_config.PATH}')
def run_train(self, train, dev):
if not os.path.isdir(self.args.dsave):
os.makedirs(self.args.dsave)
logger = logging.getLogger(self.__class__.__name__)
logger.setLevel(logging.DEBUG)
fh = logging.FileHandler(os.path.join(self.args.dsave, 'train.log'))
fh.setLevel(logging.CRITICAL)
logger.addHandler(fh)
ch = logging.StreamHandler()
ch.setLevel(logging.CRITICAL)
logger.addHandler(ch)
num_train_steps = int(len(train) / self.args.train_batch * self.args.epoch)
# remove pooler
param_optimizer = list(self.named_parameters())
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},
]
optimizer = BertAdam(optimizer_grouped_parameters, lr=self.args.learning_rate, warmup=self.args.warmup, t_total=num_train_steps)
print('num_train', len(train))
print('num_dev', len(dev))
global_step = 0
best_metrics = {self.args.early_stop: -float('inf')}
for epoch in trange(self.args.epoch, desc='epoch',):
self.epoch = epoch
train = train[:]
np.random.shuffle(train)
train_stats = defaultdict(list)
gates = []
preds = []
self.train()
for i in trange(0, len(train), self.args.train_batch, desc='batch'):
actual_train_batch = int(self.args.train_batch / self.args.gradient_accumulation_steps)
batch_stats = defaultdict(list)
batch = train[i: i + self.args.train_batch]
for accu_i in range(0, len(batch), actual_train_batch):
actual_batch = batch[accu_i : accu_i + actual_train_batch]
out = self(actual_batch)
gates.extend(out['gate'])
pred = self.extract_preds(out, actual_batch)
loss = self.compute_loss(out, actual_batch)
for k, v in loss.items():
loss[k] = v / self.args.gradient_accumulation_steps
batch_stats[k].append(v.item()/ self.args.gradient_accumulation_steps)
sum(loss.values()).backward()
preds += pred
lr_this_step = self.args.learning_rate * warmup_linear(global_step/num_train_steps, self.args.warmup)
for param_group in optimizer.param_groups:
param_group['lr'] = lr_this_step
optimizer.step()
optimizer.zero_grad()
global_step += 1
for k in batch_stats.keys():
train_stats['loss_' + k].append(sum(batch_stats[k]))
if global_step % self.args.eval_every_steps == 0:
dev_stats = defaultdict(list)
dev_preds, dev_gates = self.run_pred(dev)
dev_metrics = {k: sum(v) / len(v) for k, v in dev_stats.items()}
dev_metrics.update(self.compute_metrics(dev_preds, dev))
dev_metrics.update({'gate_avg': mean(dev_gates)})
dev_metrics.update({'gate_std': stdev(dev_gates)})
metrics = {'global_step': global_step}
# metrics.update({'train_' + k: v for k, v in train_metrics.items()})
metrics.update({'dev_' + k: v for k, v in dev_metrics.items()})
logger.critical(pformat(metrics))
if metrics[self.args.early_stop] > best_metrics[self.args.early_stop]:
logger.critical('Found new best! Saving to ' + self.args.dsave)
best_metrics = metrics
self.save(best_metrics, self.args.dsave, self.args.early_stop)
with open(os.path.join(self.args.dsave, 'dev.preds.json'), 'wt') as f:
json.dump(dev_preds, f, indent=2)
with open(os.path.join(self.args.dsave, 'dev.best_metrics.json'), 'wt') as f:
json.dump(best_metrics, f, indent=2)
self.train()
train_metrics = {k: sum(v) / len(v) for k, v in train_stats.items()}
train_metrics.update(self.compute_metrics(preds, train))
train_metrics.update({'gate_avg': mean(gates)})
train_metrics.update({'gate_std': stdev(gates)})
dev_stats = defaultdict(list)
dev_preds, dev_gates = self.run_pred(dev)
dev_metrics = {k: sum(v) / len(v) for k, v in dev_stats.items()}
dev_metrics.update(self.compute_metrics(dev_preds, dev))
dev_metrics.update({'gate_avg': mean(dev_gates)})
dev_metrics.update({'gate_std': stdev(dev_gates)})
metrics = {'global_step': global_step}
metrics.update({'train_' + k: v for k, v in train_metrics.items()})
metrics.update({'dev_' + k: v for k, v in dev_metrics.items()})
logger.critical(pformat(metrics))
if metrics[self.args.early_stop] > best_metrics[self.args.early_stop]:
logger.critical('Found new best! Saving to ' + self.args.dsave)
best_metrics = metrics
self.save(best_metrics, self.args.dsave, self.args.early_stop)
with open(os.path.join(self.args.dsave, 'dev.preds.json'), 'wt') as f:
json.dump(dev_preds, f, indent=2)
with open(os.path.join(self.args.dsave, 'dev.best_metrics.json'), 'wt') as f:
json.dump(best_metrics, f, indent=2)
logger.critical('Best dev')
logger.critical(pformat(best_metrics))
def train(self):
with open(os.path.join(self.results_folder, "log.txt"), "w") as f_log:
for train, test in LeaveOneOut().split(self.dfs):
train_set = [self.dfs[i] for i in train]
test_set = self.dfs[test[0]]
# Create sentence and label lists
sentences_list = []
labels_list = []
for i, book in enumerate(train_set):
sentences_list.extend(book.sentence.values)
labels_list.extend(book.label.values)
f_log.write("Length book: " + str(len(sentences_list[i])) +
'\n')
f_log.write("Sentences: " + str(len(sentences_list)) +
", labels:" + str(len(labels_list)) + '\n')
MAX_LEN = 128
# We need to add special tokens at the beginning and end of each sentence for BERT to work properly
sentences_train = [
self.tokenizer.encode_plus(sent,
add_special_tokens=True,
max_length=MAX_LEN)
for i, sent in enumerate(sentences_list)
]
le = LabelEncoder()
labels_train = labels_list
f_log.write(str(labels_train[:10]) + '\n')
f_log.write('Analyze labels' + '\n')
le.fit(labels_train)
le_name_mapping = dict(
zip(le.classes_, le.transform(le.classes_)))
f_log.write(str(le_name_mapping) + '\n')
labels_train = le.fit_transform(labels_train)
# Use the BERT tokenizer to convert the tokens to their index numbers in the BERT vocabulary
input_ids_train = [
inputs["input_ids"] for inputs in sentences_train
]
# Pad our input tokens
input_ids_train = pad_sequences(input_ids_train,
maxlen=MAX_LEN,
truncating="post",
padding="post")
# Create attention masks
attention_masks_train = []
# Create a mask of 1s for each token followed by 0s for padding
for seq in input_ids_train:
seq_mask_train = [float(i > 0) for i in seq]
attention_masks_train.append(seq_mask_train)
# Use train_test_split to split our data into train and validation sets for training
train_inputs, train_labels = input_ids_train, labels_train
train_masks, _ = attention_masks_train, input_ids_train
# Convert all of our data into torch tensors, the required datatype for our model
train_inputs = torch.tensor(train_inputs).to(torch.int64)
train_labels = torch.tensor(train_labels).to(torch.int64)
train_masks = torch.tensor(train_masks).to(torch.int64)
batch_size = 32
# Create an iterator of our data with torch DataLoader. This helps save on memory during training
# because, unlike a for loop, with an iterator the entire dataset does not need to be loaded into
# memory
train_data = TensorDataset(train_inputs, train_masks,
train_labels)
train_sampler = RandomSampler(train_data)
train_dataloader = DataLoader(train_data,
sampler=train_sampler,
batch_size=batch_size)
torch.cuda.empty_cache()
# BINARY CLASSIFIER
model = BertForSequenceClassification.from_pretrained(
"bert-base-uncased", num_labels=2)
model.cuda()
param_optimizer = list(model.named_parameters())
no_decay = ['bias', 'gamma', 'beta']
optimizer_grouped_parameters = [{
'params': [
p for n, p in param_optimizer
if not any(nd in n for nd in no_decay)
],
'weight_decay_rate':
0.01
}, {
'params': [
p for n, p in param_optimizer
if any(nd in n for nd in no_decay)
],
'weight_decay_rate':
0.0
}]
# This variable contains all of the hyperparemeter information our training loop needs
optimizer = BertAdam(optimizer_grouped_parameters,
lr=2e-5,
warmup=.1)
train_loss_set = []
# Number of training epochs (authors recommend between 2 and 4)
epochs = 10
device = torch.device(
"cuda" if torch.cuda.is_available() else "cpu")
torch.cuda.get_device_name(0)
for _ in trange(epochs, desc="Epoch"):
# Training
# Set our model to training mode (as opposed to evaluation mode)
model.train()
# Tracking variables
tr_loss = 0
nb_tr_examples, nb_tr_steps = 0, 0
# Train the data for one epoch
for step, batch in enumerate(train_dataloader):
# Add batch to GPU
batch = tuple(t.to(device) for t in batch)
# Unpack the inputs from our dataloader
b_input_ids, b_input_mask, b_labels = batch
# Clear out the gradients (by default they accumulate)
optimizer.zero_grad()
# Forward pass
loss = model(b_input_ids,
token_type_ids=None,
attention_mask=b_input_mask,
labels=b_labels)
train_loss_set.append(loss.item())
# Backward pass
loss.backward()
# Update parameters and take a step using the computed gradient
optimizer.step()
# Update tracking variables
tr_loss += loss.item()
nb_tr_examples += b_input_ids.size(0)
nb_tr_steps += 1
f_log.write("Train loss: {}".format(tr_loss /
nb_tr_steps) + '\n')
plt.figure(figsize=(15, 8))
plt.title("Training loss")
plt.xlabel("Batch")
plt.ylabel("Loss")
plt.plot(train_loss_set)
plt.savefig(self.img_folder + 'train' + str(test[0]) + '.png')
model_to_save = model
WEIGHTS_NAME = "BERT_Novel_test" + str(test[0]) + ".bin"
OUTPUT_DIR = self.models_folder
output_model_file = os.path.join(OUTPUT_DIR, WEIGHTS_NAME)
f_log.write(str(output_model_file) + '\n')
torch.save(model_to_save.state_dict(), output_model_file)
state_dict = torch.load(output_model_file)
model.load_state_dict(state_dict)
sentences6 = test_set.sentence.values
f_log.write(str(len(sentences6)) + '\n')
labels6 = test_set.label.values
labels_test = labels6
sentences11 = sentences6
sentences_test = [
self.tokenizer.encode_plus(sent,
add_special_tokens=True,
max_length=MAX_LEN)
for i, sent in enumerate(sentences11)
]
f_log.write('Analyze labels test' + '\n')
le.fit(labels_test)
le_name_mapping = dict(
zip(le.classes_, le.transform(le.classes_)))
f_log.write(str(le_name_mapping) + '\n')
labels_test = le.fit_transform(labels_test)
MAX_LEN = 128
# Use the BERT tokenizer to convert the tokens to their index numbers in the BERT vocabulary
input_ids1 = [inputs["input_ids"] for inputs in sentences_test]
# Pad our input tokens
input_ids1 = pad_sequences(input_ids1,
maxlen=MAX_LEN,
truncating="post",
padding="post")
# Create attention masks
attention_masks1 = []
# Create a mask of 1s for each token followed by 0s for padding
for seq in input_ids1:
seq_mask1 = [float(i > 0) for i in seq]
attention_masks1.append(seq_mask1)
f_log.write(str(len(attention_masks1[0])) + '\n')
prediction_inputs = torch.tensor(input_ids1).to(torch.int64)
prediction_masks = torch.tensor(attention_masks1).to(
torch.int64)
prediction_labels = torch.tensor(labels_test).to(torch.int64)
batch_size = 32
prediction_data = TensorDataset(prediction_inputs,
prediction_masks,
prediction_labels)
prediction_sampler = SequentialSampler(prediction_data)
prediction_dataloader = DataLoader(prediction_data,
sampler=prediction_sampler,
batch_size=batch_size)
# Prediction on test set
# Put model in evaluation mode
model.eval()
# Tracking variables
predictions, true_labels = [], []
# Predict
for batch in prediction_dataloader:
# Add batch to GPU
batch = tuple(t.to(device) for t in batch)
# Unpack the inputs from our dataloader
b_input_ids, b_input_mask, b_labels = batch
# Telling the model not to compute or store gradients, saving memory and speeding up prediction
with torch.no_grad():
# Forward pass, calculate logit predictions
logits = model(b_input_ids,
token_type_ids=None,
attention_mask=b_input_mask)
# Move logits and labels to CPU
logits = logits.detach().cpu().numpy()
label_ids = b_labels.to('cpu').numpy()
# Store predictions and true labels
predictions.append(logits)
true_labels.append(label_ids)
f_log.write(
str(len(predictions)) + ' ' + str(len(true_labels)) + '\n')
f_log.write(str(predictions[0][0]) + '\n')
# Import and evaluate each test batch using Matthew's correlation coefficient
matthews_set = []
for i in range(len(true_labels)):
matthews = matthews_corrcoef(
true_labels[i],
np.argmax(predictions[i], axis=1).flatten())
matthews_set.append(matthews)
# Flatten the predictions and true values for aggregate Matthew's evaluation on the whole dataset
flat_predictions = [
item for sublist in predictions for item in sublist
]
flat_predictions = np.argmax(flat_predictions,
axis=1).flatten()
flat_true_labels = [
item for sublist in true_labels for item in sublist
]
f_log.write(
str(len(flat_predictions) + ' ' + len(flat_true_labels)) +
'\n')
f_log.write(
str(flat_predictions[989:994] + ' ' +
flat_true_labels[989:994]) + '\n')
f_log.write(
str(flat_predictions[0:11] + ' ' +
flat_true_labels[0:11]) + '\n')
f_log.write('Classification Report' + '\n')
f_log.write(
str(
classification_report(flat_true_labels,
flat_predictions)) + '\n')
f_log.write(
str(confusion_matrix(flat_true_labels, flat_predictions)) +
'\n')
def train(self):
if self.debug_mode: self.epochs = 1
# 加载 dataloader
train_loader, valid_loader = self.create_dataloader()
# 训练
self.seed_everything()
lr = 2e-5
accumulation_steps = math.ceil(self.batch_size / self.base_batch_size)
# 预训练 bert 转成 pytorch
if os.path.exists(self.work_dir + 'pytorch_model.bin') is False:
print("Convert pre-trained model")
convert_tf_checkpoint_to_pytorch.convert_tf_checkpoint_to_pytorch(
self.bert_model_path + 'bert_model.ckpt',
self.bert_model_path + 'bert_config.json',
self.work_dir + 'pytorch_model.bin')
shutil.copyfile(self.bert_model_path + 'bert_config.json',
self.work_dir + 'bert_config.json')
# 加载预训练模型
print("Load checkpoint")
model = BertNeuralNet.from_pretrained(self.work_dir, cache_dir=None)
# TODO: 读取模型
model.load_state_dict(
torch.load("../input/train48-bert-kernel/model_last.bin"))
model.zero_grad()
model = model.to(self.device)
# 不同的参数组设置不同的 weight_decay
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
}]
epoch_steps = int(self.train_len * 0.5 / self.base_batch_size /
accumulation_steps)
num_train_optimization_steps = int(self.epochs * epoch_steps)
valid_every = math.floor(epoch_steps * accumulation_steps / 5)
optimizer = BertAdam(optimizer_grouped_parameters,
lr=lr,
warmup=-1,
t_total=-1)
# 渐变学习速率
#scheduler = torch.optim.lr_scheduler.LambdaLR(optimizer, lambda epoch: 0.6 ** epoch)
model, optimizer = amp.initialize(model,
optimizer,
opt_level="O1",
verbosity=0)
# 开始训练
print("Train")
best_auc_score_1 = 0
best_auc_score_2 = 0
best_auc_score_3 = 0
best_auc_score_4 = 0
f_log = open("train_log.txt", "w")
model.eval()
new_valid_loader = copy.deepcopy(valid_loader)
y_pred = np.zeros((len(self.train_df) - self.train_len))
for j, valid_batch_data in enumerate(new_valid_loader):
x_batch = valid_batch_data[0]
batch_y_pred = self.sigmoid(
model(x_batch.to(self.device),
attention_mask=(x_batch > 0).to(self.device),
labels=None).detach().cpu().numpy())[:, 0]
y_pred[j * self.base_batch_size:(j + 1) *
self.base_batch_size] = batch_y_pred
# 计算得分
auc_score = self.evaluator.get_final_metric(y_pred)
f_log.write("init auc_score: %.4f\n" % auc_score)
print("init auc_score: %.4f" % auc_score)
for epoch in range(self.epochs):
model.train()
optimizer.zero_grad()
# 加载每个 batch 并训练
train_start_time = time.time()
for i, batch_data in enumerate(train_loader):
x_batch = batch_data[0]
y_batch = batch_data[1]
target_weight_batch = batch_data[2]
aux_weight_batch = batch_data[3]
identity_weight_batch = batch_data[4]
np_weight_batch = batch_data[5]
np_identity_weight_batch = batch_data[6]
y_pred = model(x_batch.to(self.device),
attention_mask=(x_batch > 0).to(self.device),
labels=None)
target_loss, aux_loss, identity_loss, np_loss = self.custom_loss(
y_pred, y_batch, epoch, target_weight_batch,
aux_weight_batch, identity_weight_batch, np_weight_batch)
loss = target_loss + aux_loss + identity_loss + np_loss
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
if (i + 1) % accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
# 验证
if (i + 1) % valid_every == 0:
model.eval()
stage = int((i + 1) / valid_every)
train_stage_duration = int(
(time.time() - train_start_time) / 60)
valid_start_time = time.time()
y_pred = np.zeros((len(self.train_df) - self.train_len))
for j, valid_batch_data in enumerate(valid_loader):
x_batch = valid_batch_data[0]
batch_y_pred = self.sigmoid(
model(x_batch.to(self.device),
attention_mask=(x_batch > 0).to(self.device),
labels=None).detach().cpu().numpy())[:, 0]
y_pred[j * self.base_batch_size:(j + 1) *
self.base_batch_size] = batch_y_pred
# 计算得分
auc_score = self.evaluator.get_final_metric(y_pred)
valid_duration = int((time.time() - valid_start_time) / 60)
train_start_time = time.time()
f_log.write(
"epoch: %d stage: %d train_stage_duration: %dmin valid_duration: %dmin auc_score: %.4f\n"
% (epoch, stage, train_stage_duration, valid_duration,
auc_score))
print(
"epoch: %d stage: %d train_stage_duration: %dmin valid_duration: %dmin auc_score: %.4f"
% (epoch, stage, train_stage_duration, valid_duration,
auc_score))
if auc_score > best_auc_score_4:
state_dict = model.state_dict()
if auc_score > best_auc_score_1:
best_auc_score_1 = auc_score
torch.save(state_dict, "model1.bin")
elif auc_score > best_auc_score_2:
best_auc_score_2 = auc_score
torch.save(state_dict, "model2.bin")
elif auc_score > best_auc_score_3:
best_auc_score_3 = auc_score
torch.save(state_dict, "model3.bin")
else:
best_auc_score_4 = auc_score
torch.save(state_dict, "model4.bin")
with open("model_score.txt", "w") as f:
f.write(
"model1: %.4f model2: %.4f model3: %.4f model4: %.4f"
% (best_auc_score_1, best_auc_score_2,
best_auc_score_3, best_auc_score_4))
print(
"model1: %.4f model2: %.4f model3: %.4f model4: %.4f"
% (best_auc_score_1, best_auc_score_2,
best_auc_score_3, best_auc_score_4))
model.train()
if self.last is True:
state_dict = model.state_dict()
torch.save(state_dict, "model_last.bin")
# del 训练相关输入和模型
training_history = [
train_loader, valid_loader, model, optimizer, param_optimizer,
optimizer_grouped_parameters
]
for variable in training_history:
del variable
gc.collect()
class MTDNNModel(MTDNNPretrainedModel):
"""Instance of an MTDNN Model
Arguments:
MTDNNPretrainedModel {BertPretrainedModel} -- Inherited from Bert Pretrained
config {MTDNNConfig} -- MTDNN Configuration Object
pretrained_model_name {str} -- Name of the pretrained model to initial checkpoint
num_train_step {int} -- Number of steps to take each training
Raises:
RuntimeError: [description]
ImportError: [description]
Returns:
MTDNNModel -- An Instance of an MTDNN Model
"""
def __init__(
self,
config: MTDNNConfig,
task_defs: MTDNNTaskDefs,
pretrained_model_name: str = "mtdnn-base-uncased",
num_train_step: int = -1,
decoder_opts: list = None,
task_types: list = None,
dropout_list: list = None,
loss_types: list = None,
kd_loss_types: list = None,
tasks_nclass_list: list = None,
multitask_train_dataloader: DataLoader = None,
dev_dataloaders_list: list = None, # list of dataloaders
test_dataloaders_list: list = None, # list of dataloaders
test_datasets_list: list = ["mnli_mismatched", "mnli_matched"],
output_dir: str = "checkpoint",
log_dir: str = "tensorboard_logdir",
):
# Input validation
assert (
config.init_checkpoint in self.supported_init_checkpoints()
), f"Initial checkpoint must be in {self.supported_init_checkpoints()}"
assert decoder_opts, "Decoder options list is required!"
assert task_types, "Task types list is required!"
assert dropout_list, "Task dropout list is required!"
assert loss_types, "Loss types list is required!"
assert kd_loss_types, "KD Loss types list is required!"
assert tasks_nclass_list, "Tasks nclass list is required!"
assert (multitask_train_dataloader
), "DataLoader for multiple tasks cannot be None"
assert test_datasets_list, "Pass a list of test dataset prefixes"
super(MTDNNModel, self).__init__(config)
# Initialize model config and update with training options
self.config = config
self.update_config_with_training_opts(
decoder_opts,
task_types,
dropout_list,
loss_types,
kd_loss_types,
tasks_nclass_list,
)
self.task_defs = task_defs
self.multitask_train_dataloader = multitask_train_dataloader
self.dev_dataloaders_list = dev_dataloaders_list
self.test_dataloaders_list = test_dataloaders_list
self.test_datasets_list = test_datasets_list
self.output_dir = output_dir
self.log_dir = log_dir
# Create the output_dir if it's doesn't exist
MTDNNCommonUtils.create_directory_if_not_exists(self.output_dir)
self.tensor_board = SummaryWriter(log_dir=self.log_dir)
self.pooler = None
# Resume from model checkpoint
if self.config.resume and self.config.model_ckpt:
assert os.path.exists(
self.config.model_ckpt), "Model checkpoint does not exist"
logger.info(f"loading model from {self.config.model_ckpt}")
self = self.load(self.config.model_ckpt)
return
# Setup the baseline network
# - Define the encoder based on config options
# - Set state dictionary based on configuration setting
# - Download pretrained model if flag is set
# TODO - Use Model.pretrained_model() after configuration file is hosted.
if self.config.use_pretrained_model:
with MTDNNCommonUtils.download_path() as file_path:
path = pathlib.Path(file_path)
self.local_model_path = MTDNNCommonUtils.maybe_download(
url=self.
pretrained_model_archive_map[pretrained_model_name],
log=logger,
)
self.bert_model = MTDNNCommonUtils.load_pytorch_model(
self.local_model_path)
self.state_dict = self.bert_model["state"]
else:
# Set the config base on encoder type set for initial checkpoint
if config.encoder_type == EncoderModelType.BERT:
self.bert_config = BertConfig.from_dict(self.config.to_dict())
self.bert_model = BertModel.from_pretrained(
self.config.init_checkpoint)
self.state_dict = self.bert_model.state_dict()
self.config.hidden_size = self.bert_config.hidden_size
if config.encoder_type == EncoderModelType.ROBERTA:
# Download and extract from PyTorch hub if not downloaded before
self.bert_model = torch.hub.load("pytorch/fairseq",
config.init_checkpoint)
self.config.hidden_size = self.bert_model.args.encoder_embed_dim
self.pooler = LinearPooler(self.config.hidden_size)
new_state_dict = {}
for key, val in self.bert_model.state_dict().items():
if key.startswith("model.decoder.sentence_encoder"
) or key.startswith(
"model.classification_heads"):
key = f"bert.{key}"
new_state_dict[key] = val
# backward compatibility PyTorch <= 1.0.0
if key.startswith("classification_heads"):
key = f"bert.model.{key}"
new_state_dict[key] = val
self.state_dict = new_state_dict
self.updates = (self.state_dict["updates"] if self.state_dict
and "updates" in self.state_dict else 0)
self.local_updates = 0
self.train_loss = AverageMeter()
self.network = SANBERTNetwork(
init_checkpoint_model=self.bert_model,
pooler=self.pooler,
config=self.config,
)
if self.state_dict:
self.network.load_state_dict(self.state_dict, strict=False)
self.mnetwork = (nn.DataParallel(self.network)
if self.config.multi_gpu_on else self.network)
self.total_param = sum([
p.nelement() for p in self.network.parameters() if p.requires_grad
])
# Move network to GPU if device available and flag set
if self.config.cuda:
self.network.cuda(device=self.config.cuda_device)
self.optimizer_parameters = self._get_param_groups()
self._setup_optim(self.optimizer_parameters, self.state_dict,
num_train_step)
self.para_swapped = False
self.optimizer.zero_grad()
self._setup_lossmap()
def _get_param_groups(self):
no_decay = [
"bias", "gamma", "beta", "LayerNorm.bias", "LayerNorm.weight"
]
optimizer_parameters = [
{
"params": [
p for n, p in self.network.named_parameters()
if not any(nd in n for nd in no_decay)
],
"weight_decay":
0.01,
},
{
"params": [
p for n, p in self.network.named_parameters()
if any(nd in n for nd in no_decay)
],
"weight_decay":
0.0,
},
]
return optimizer_parameters
def _setup_optim(self,
optimizer_parameters,
state_dict: dict = None,
num_train_step: int = -1):
# Setup optimizer parameters
if self.config.optimizer == "sgd":
self.optimizer = optim.SGD(
optimizer_parameters,
self.config.learning_rate,
weight_decay=self.config.weight_decay,
)
elif self.config.optimizer == "adamax":
self.optimizer = Adamax(
optimizer_parameters,
self.config.learning_rate,
warmup=self.config.warmup,
t_total=num_train_step,
max_grad_norm=self.config.grad_clipping,
schedule=self.config.warmup_schedule,
weight_decay=self.config.weight_decay,
)
elif self.config.optimizer == "radam":
self.optimizer = RAdam(
optimizer_parameters,
self.config.learning_rate,
warmup=self.config.warmup,
t_total=num_train_step,
max_grad_norm=self.config.grad_clipping,
schedule=self.config.warmup_schedule,
eps=self.config.adam_eps,
weight_decay=self.config.weight_decay,
)
# The current radam does not support FP16.
self.config.fp16 = False
elif self.config.optimizer == "adam":
self.optimizer = Adam(
optimizer_parameters,
lr=self.config.learning_rate,
warmup=self.config.warmup,
t_total=num_train_step,
max_grad_norm=self.config.grad_clipping,
schedule=self.config.warmup_schedule,
weight_decay=self.config.weight_decay,
)
else:
raise RuntimeError(
f"Unsupported optimizer: {self.config.optimizer}")
# Clear scheduler for certain optimizer choices
if self.config.optimizer in ["adam", "adamax", "radam"]:
if self.config.have_lr_scheduler:
self.config.have_lr_scheduler = False
if state_dict and "optimizer" in state_dict:
self.optimizer.load_state_dict(state_dict["optimizer"])
if self.config.fp16:
try:
global amp
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use fp16 training."
)
model, optimizer = amp.initialize(
self.network,
self.optimizer,
opt_level=self.config.fp16_opt_level)
self.network = model
self.optimizer = optimizer
if self.config.have_lr_scheduler:
if self.config.scheduler_type == "rop":
self.scheduler = ReduceLROnPlateau(self.optimizer,
mode="max",
factor=self.config.lr_gamma,
patience=3)
elif self.config.scheduler_type == "exp":
self.scheduler = ExponentialLR(self.optimizer,
gamma=self.config.lr_gamma
or 0.95)
else:
milestones = [
int(step) for step in (
self.config.multi_step_lr or "10,20,30").split(",")
]
self.scheduler = MultiStepLR(self.optimizer,
milestones=milestones,
gamma=self.config.lr_gamma)
else:
self.scheduler = None
def _setup_lossmap(self):
self.task_loss_criterion = []
for idx, cs in enumerate(self.config.loss_types):
assert cs is not None, "Loss type must be defined."
lc = LOSS_REGISTRY[cs](name=f"Loss func of task {idx}: {cs}")
self.task_loss_criterion.append(lc)
def _setup_kd_lossmap(self):
loss_types = self.config.kd_loss_types
self.kd_task_loss_criterion = []
if config.mkd_opt > 0:
for idx, cs in enumerate(loss_types):
assert cs, "Loss type must be defined."
lc = LOSS_REGISTRY[cs](
name="Loss func of task {}: {}".format(idx, cs))
self.kd_task_loss_criterion.append(lc)
def _to_cuda(self, tensor):
# Set tensor to gpu (non-blocking) if a PyTorch tensor
if tensor is None:
return tensor
if isinstance(tensor, list) or isinstance(tensor, tuple):
y = [
e.cuda(device=self.config.cuda_device, non_blocking=True)
for e in tensor
]
for t in y:
t.requires_grad = False
else:
y = tensor.cuda(device=self.config.cuda_device, non_blocking=True)
y.requires_grad = False
return y
def train(self):
if self.para_swapped:
self.para_swapped = False
def update(self, batch_meta, batch_data):
self.network.train()
target = batch_data[batch_meta["label"]]
soft_labels = None
task_type = batch_meta["task_type"]
target = self._to_cuda(target) if self.config.cuda else target
task_id = batch_meta["task_id"]
inputs = batch_data[:batch_meta["input_len"]]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
weight = None
if self.config.weighted_on:
if self.config.cuda:
weight = batch_data[batch_meta["factor"]].cuda(
device=self.config.cuda_device, non_blocking=True)
else:
weight = batch_data[batch_meta["factor"]]
logits = self.mnetwork(*inputs)
# compute loss
loss = 0
if self.task_loss_criterion[task_id] and (target is not None):
loss = self.task_loss_criterion[task_id](logits,
target,
weight,
ignore_index=-1)
# compute kd loss
if self.config.mkd_opt > 0 and ("soft_label" in batch_meta):
soft_labels = batch_meta["soft_label"]
soft_labels = (self._to_cuda(soft_labels)
if self.config.cuda else soft_labels)
kd_lc = self.kd_task_loss_criterion[task_id]
kd_loss = (kd_lc(logits, soft_labels, weight, ignore_index=-1)
if kd_lc else 0)
loss = loss + kd_loss
self.train_loss.update(loss.item(),
batch_data[batch_meta["token_id"]].size(0))
# scale loss
loss = loss / (self.config.grad_accumulation_step or 1)
if self.config.fp16:
with amp.scale_loss(loss, self.optimizer) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.local_updates += 1
if self.local_updates % self.config.grad_accumulation_step == 0:
if self.config.global_grad_clipping > 0:
if self.config.fp16:
torch.nn.utils.clip_grad_norm_(
amp.master_params(self.optimizer),
self.config.global_grad_clipping,
)
else:
torch.nn.utils.clip_grad_norm_(
self.network.parameters(),
self.config.global_grad_clipping)
self.updates += 1
# reset number of the grad accumulation
self.optimizer.step()
self.optimizer.zero_grad()
def eval_mode(
self,
data: DataLoader,
metric_meta,
use_cuda=True,
with_label=True,
label_mapper=None,
task_type=TaskType.Classification,
):
if use_cuda:
self.cuda()
predictions = []
golds = []
scores = []
ids = []
metrics = {}
for idx, (batch_info, batch_data) in enumerate(data):
if idx % 100 == 0:
logger.info(f"predicting {idx}")
batch_info, batch_data = MTDNNCollater.patch_data(
use_cuda, batch_info, batch_data)
score, pred, gold = self._predict_batch(batch_info, batch_data)
predictions.extend(pred)
golds.extend(gold)
scores.extend(score)
ids.extend(batch_info["uids"])
if task_type == TaskType.Span:
golds = merge_answers(ids, golds)
predictions, scores = select_answers(ids, predictions, scores)
if with_label:
metrics = calc_metrics(metric_meta, golds, predictions, scores,
label_mapper)
return metrics, predictions, scores, golds, ids
def _predict_batch(self, batch_meta, batch_data):
self.network.eval()
task_id = batch_meta["task_id"]
task_type = batch_meta["task_type"]
inputs = batch_data[:batch_meta["input_len"]]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
score = self.mnetwork(*inputs)
if task_type == TaskType.Ranking:
score = score.contiguous().view(-1, batch_meta["pairwise_size"])
assert task_type == TaskType.Ranking
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.zeros(score.shape, dtype=int)
positive = np.argmax(score, axis=1)
for idx, pos in enumerate(positive):
predict[idx, pos] = 1
predict = predict.reshape(-1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta["true_label"]
elif task_type == TaskType.SequenceLabeling:
mask = batch_data[batch_meta["mask"]]
score = score.contiguous()
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).reshape(mask.size()).tolist()
valied_lenght = mask.sum(1).tolist()
final_predict = []
for idx, p in enumerate(predict):
final_predict.append(p[:valied_lenght[idx]])
score = score.reshape(-1).tolist()
return score, final_predict, batch_meta["label"]
elif task_type == TaskType.Span:
start, end = score
predictions = []
if self.config.encoder_type == EncoderModelType.BERT:
scores, predictions = extract_answer(
batch_meta,
batch_data,
start,
end,
self.config.get("max_answer_len", 5),
)
return scores, predictions, batch_meta["answer"]
else:
if task_type == TaskType.Classification:
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta["label"]
def fit(self, epochs=0):
""" Fit model to training datasets """
epochs = epochs or self.config.epochs
logger.info(f"Total number of params: {self.total_param}")
for epoch in range(epochs):
logger.info(f"At epoch {epoch}")
logger.info(
f"Amount of data to go over: {len(self.multitask_train_dataloader)}"
)
start = datetime.now()
# Create batches and train
for idx, (batch_meta, batch_data) in enumerate(
self.multitask_train_dataloader):
batch_meta, batch_data = MTDNNCollater.patch_data(
self.config.cuda, batch_meta, batch_data)
task_id = batch_meta["task_id"]
self.update(batch_meta, batch_data)
if (self.local_updates == 1 or (self.local_updates) %
(self.config.log_per_updates *
self.config.grad_accumulation_step) == 0):
time_left = str((datetime.now() - start) / (idx + 1) *
(len(self.multitask_train_dataloader) -
idx - 1)).split(".")[0]
logger.info(
"Task - [{0:2}] Updates - [{1:6}] Training Loss - [{2:.5f}] Time Remaining - [{3}]"
.format(
task_id,
self.updates,
self.train_loss.avg,
time_left,
))
if self.config.use_tensor_board:
self.tensor_board.add_scalar(
"train/loss",
self.train_loss.avg,
global_step=self.updates,
)
if self.config.save_per_updates_on and (
(self.local_updates) %
(self.config.save_per_updates *
self.config.grad_accumulation_step) == 0):
model_file = os.path.join(
self.output_dir,
"model_{}_{}.pt".format(epoch, self.updates),
)
logger.info(f"Saving mt-dnn model to {model_file}")
self.save(model_file)
# TODO: Alternatively, we need to refactor save function
# and move into prediction
# Saving each checkpoint after model training
model_file = os.path.join(self.output_dir,
"model_{}.pt".format(epoch))
logger.info(f"Saving mt-dnn model to {model_file}")
self.save(model_file)
def predict(self,
trained_model_chckpt: str = None,
saved_epoch_idx: int = 0):
"""
Inference of model on test datasets
"""
# Load a trained checkpoint if a valid model checkpoint
if trained_model_chckpt and os.path.exists(trained_model_chckpt):
logger.info(f"Running predictions using: {trained_model_chckpt}")
self.load(trained_model_chckpt)
# Create batches and train
start = datetime.now()
for idx, dataset in enumerate(self.test_datasets_list):
prefix = dataset.split("_")[0]
label_dict = self.task_defs.global_map.get(prefix, None)
dev_data: DataLoader = self.dev_dataloaders_list[idx]
if dev_data is not None:
with torch.no_grad():
(
dev_metrics,
dev_predictions,
scores,
golds,
dev_ids,
) = self.eval_mode(
dev_data,
metric_meta=self.task_defs.metric_meta_map[prefix],
use_cuda=self.config.cuda,
label_mapper=label_dict,
task_type=self.task_defs.task_type_map[prefix],
)
for key, val in dev_metrics.items():
if self.config.use_tensor_board:
self.tensor_board.add_scalar(
f"dev/{dataset}/{key}",
val,
global_step=saved_epoch_idx)
if isinstance(val, str):
logger.info(
f"Task {dataset} -- epoch {saved_epoch_idx} -- Dev {key}:\n {val}"
)
else:
logger.info(
f"Task {dataset} -- epoch {saved_epoch_idx} -- Dev {key}: {val:.3f}"
)
score_file = os.path.join(
self.output_dir,
f"{dataset}_dev_scores_{saved_epoch_idx}.json")
results = {
"metrics": dev_metrics,
"predictions": dev_predictions,
"uids": dev_ids,
"scores": scores,
}
# Save results to file
MTDNNCommonUtils.dump(score_file, results)
if self.config.use_glue_format:
official_score_file = os.path.join(
self.output_dir,
"{}_dev_scores_{}.tsv".format(dataset,
saved_epoch_idx),
)
submit(official_score_file, results, label_dict)
# test eval
test_data: DataLoader = self.test_dataloaders_list[idx]
if test_data is not None:
with torch.no_grad():
(
test_metrics,
test_predictions,
scores,
golds,
test_ids,
) = self.eval_mode(
test_data,
metric_meta=self.task_defs.metric_meta_map[prefix],
use_cuda=self.config.cuda,
with_label=False,
label_mapper=label_dict,
task_type=self.task_defs.task_type_map[prefix],
)
score_file = os.path.join(
self.output_dir,
f"{dataset}_test_scores_{saved_epoch_idx}.json")
results = {
"metrics": test_metrics,
"predictions": test_predictions,
"uids": test_ids,
"scores": scores,
}
MTDNNCommonUtils.dump(score_file, results)
if self.config.use_glue_format:
official_score_file = os.path.join(
self.output_dir,
f"{dataset}_test_scores_{saved_epoch_idx}.tsv")
submit(official_score_file, results, label_dict)
logger.info("[new test scores saved.]")
# Close tensorboard connection if opened
self.close_connections()
def close_connections(self):
# Close tensor board connection
if self.config.use_tensor_board:
self.tensor_board.close()
def extract(self, batch_meta, batch_data):
self.network.eval()
# 'token_id': 0; 'segment_id': 1; 'mask': 2
inputs = batch_data[:3]
all_encoder_layers, pooled_output = self.mnetwork.bert(*inputs)
return all_encoder_layers, pooled_output
def save(self, filename):
network_state = dict([(k, v.cpu())
for k, v in self.network.state_dict().items()])
params = {
"state": network_state,
"optimizer": self.optimizer.state_dict(),
"config": self.config,
}
torch.save(params, filename)
logger.info("model saved to {}".format(filename))
def load(self, checkpoint):
model_state_dict = torch.load(checkpoint)
self.network.load_state_dict(model_state_dict["state"], strict=False)
self.optimizer.load_state_dict(model_state_dict["optimizer"])
self.config = model_state_dict["config"]
def cuda(self):
self.network.cuda(device=self.config.cuda_device)
def supported_init_checkpoints(self):
"""List of allowed check points
"""
return [
"bert-base-uncased",
"bert-base-cased",
"bert-large-uncased",
"mtdnn-base-uncased",
"mtdnn-large-uncased",
"roberta.base",
"roberta.large",
]
def update_config_with_training_opts(
self,
decoder_opts,
task_types,
dropout_list,
loss_types,
kd_loss_types,
tasks_nclass_list,
):
# Update configurations with options obtained from preprocessing training data
setattr(self.config, "decoder_opts", decoder_opts)
setattr(self.config, "task_types", task_types)
setattr(self.config, "tasks_dropout_p", dropout_list)
setattr(self.config, "loss_types", loss_types)
setattr(self.config, "kd_loss_types", kd_loss_types)
setattr(self.config, "tasks_nclass_list", tasks_nclass_list)
def main():
parser = argparse.ArgumentParser()
arg = parser.add_argument
arg('mode', choices=['train', 'validate', 'predict', 'train_all'])
arg('run_root')
arg('--model', default='mybert')
arg('--pretrained', type=int, default=0)
arg('--batch-size', type=int, default=32)
arg('--step', type=int, default=1)
arg('--workers', type=int, default=2)
arg('--lr', type=float, default=0.0002)
arg('--patience', type=int, default=4)
arg('--clean', action='store_true')
arg('--n-epochs', type=int, default=1)
arg('--kloss', type=float, default=1.0)
arg('--loss_fn', default='loss1')
arg('--fold_name', default='/folds_binary_weights_kernal.pkl')
arg('--limit', type=int)
arg('--fold', type=int, default=0)
arg('--multi-gpu', type=int, default=0)
arg('--lr_layerdecay', type=float, default=0.95)
arg('--warmup', type=float, default=0.05)
arg('--split_point', type=float, default=0.3)
arg('--bsample', type=bool, default=True)
args = parser.parse_args()
set_seed()
BERT_PRETRAIN_PATH = '../input/torch-bert-weights/%s/' % (args.model)
run_root = Path('../experiments/' + args.run_root)
DATA_ROOT = Path(
'../input/jigsaw-unintended-bias-in-toxicity-classification')
folds = pd.read_pickle(DATA_ROOT / 'folds.pkl')
identity_columns = [
'male', 'female', 'homosexual_gay_or_lesbian', 'christian', 'jewish',
'muslim', 'black', 'white', 'psychiatric_or_mental_illness'
]
weights = np.ones((len(folds), )) / 4
# # Subgroup
weights += (folds[identity_columns].fillna(0).values >= 0.5).sum(
axis=1).astype(bool).astype(np.int) / 4
# # Background Positive, Subgroup Negative
weights += (((folds['target'].values >= 0.5).astype(bool).astype(np.int) +
(folds[identity_columns].fillna(0).values < 0.5).sum(
axis=1).astype(bool).astype(np.int)) >
1).astype(bool).astype(np.int) / 4
# # Background Negative, Subgroup Positive
weights += (((folds['target'].values < 0.5).astype(bool).astype(np.int) +
(folds[identity_columns].fillna(0).values >= 0.5).sum(
axis=1).astype(bool).astype(np.int)) >
1).astype(bool).astype(np.int) / 4
folds['weights'] = weights
print(folds['weights'].mean())
if args.mode == "train_all":
train_fold = folds
else:
train_fold = folds[folds['fold'] != args.fold]
valid_fold = folds[folds['fold'] == args.fold]
valid_fold = valid_fold.sort_values(by=["len"])
if args.limit:
train_fold = train_fold[:args.limit]
if args.mode != "train_all":
valid_fold = valid_fold[:args.limit * 3]
if args.mode == "train_all":
valid_df = None
else:
valid_df = valid_fold[identity_columns + ["target"]]
loss_weight = 1 / folds['weights'].mean() * args.kloss
if args.loss_fn == "loss1":
loss_fn = custom_loss
elif args.loss_fn == "loss2":
loss_fn = custom_loss2
criterion = partial(loss_fn, loss_weight=loss_weight)
if args.mode == 'train' or args.mode == "train_all":
if run_root.exists() and args.clean:
shutil.rmtree(run_root)
run_root.mkdir(exist_ok=True, parents=True)
(run_root / 'params.json').write_text(
json.dumps(vars(args), indent=4, sort_keys=True))
training_set = TrainDataset(train_fold['comment_text'].tolist(),
lens=train_fold['len'].tolist(),
target=train_fold[[
'binary_target', 'weights', 'target',
'severe_toxicity', 'obscene',
'identity_attack', 'insult', 'threat'
]].values.tolist(),
identity_df=train_fold[identity_columns],
weights=train_fold['weights'].tolist(),
model=args.model,
split_point=args.split_point)
if args.bsample:
bbsampler = BucketBatchSampler(training_set,
batch_size=args.batch_size,
drop_last=True,
sort_key=lambda x: x[1],
biggest_batches_first=None,
bucket_size_multiplier=100,
shuffle=True)
batchsize = 1
shuffle = False
else:
bbsampler = None
batchsize = args.batch_size
shuffle = True
training_loader = DataLoader(training_set,
batch_sampler=bbsampler,
collate_fn=collate_fn,
num_workers=args.workers,
batch_size=batchsize,
shuffle=shuffle)
if args.mode == "train":
valid_set = TrainDataset(
valid_fold['comment_text'].tolist(),
lens=valid_fold['len'].tolist(),
target=valid_fold['binary_target'].values.tolist(),
identity_df=valid_fold[identity_columns],
weights=valid_fold['weights'].tolist(),
model=args.model,
split_point=args.split_point)
valid_loader = DataLoader(valid_set,
batch_size=args.batch_size,
shuffle=False,
collate_fn=collate_fn,
num_workers=args.workers)
else:
valid_loader = None
# model = BertForSequenceClassification.from_pretrained(BERT_PRETRAIN_PATH,cache_dir=None,num_labels=1)
model = BertModel(BERT_PRETRAIN_PATH)
model.cuda()
if args.model in [
"bert-base-uncased", "bert-base-cased", "mybert", "gpt2",
'mybert-base-cased', 'mybert-base-uncased'
]:
NUM_LAYERS = 12
elif args.model in [
"bert-large-uncased", "bert-large-cased", "mybertlarge", "wmm",
"mybertlargecased", "mybert-large-uncased",
'mybert-wwm-uncased'
]:
NUM_LAYERS = 24
else:
raise ValueError('%s is not a valid model' % args.model)
optimizer_grouped_parameters = [{
'params':
model.bert.bert.embeddings.parameters(),
'lr':
args.lr * (args.lr_layerdecay**NUM_LAYERS)
}, {
'params': model.main_head.parameters(),
'lr': args.lr
}, {
'params': model.aux_head.parameters(),
'lr': args.lr
}, {
'params':
model.bert.bert.pooler.parameters(),
'lr':
args.lr
}]
for layer in range(NUM_LAYERS):
optimizer_grouped_parameters.append(
{
'params':
model.bert.bert.encoder.layer.__getattr__(
'%d' % (NUM_LAYERS - 1 - layer)).parameters(),
'lr':
args.lr * (args.lr_layerdecay**layer)
}, )
optimizer = BertAdam(optimizer_grouped_parameters,
lr=args.lr,
warmup=args.warmup,
t_total=len(training_loader) // args.step)
scheduler = ReduceLROnPlateau(optimizer,
patience=0,
factor=0.1,
verbose=True,
mode='max',
min_lr=1e-7)
model, optimizer = amp.initialize(model,
optimizer,
opt_level="O2",
verbosity=0)
optimizer.zero_grad()
if args.multi_gpu == 1:
model = nn.DataParallel(model)
train(args,
model,
optimizer,
scheduler,
criterion,
train_loader=training_loader,
valid_df=valid_df,
valid_loader=valid_loader,
epoch_length=len(training_set))
elif args.mode == 'validate':
valid_set = TrainDataset(valid_fold['comment_text'].tolist(),
lens=valid_fold['len'].tolist(),
target=valid_fold[['binary_target'
]].values.tolist(),
identity_df=valid_fold[identity_columns],
weights=valid_fold['weights'].tolist(),
model=args.model,
split_point=args.split_point)
valid_loader = DataLoader(valid_set,
batch_size=args.batch_size,
shuffle=False,
collate_fn=collate_fn,
num_workers=args.workers)
model = BertModel(BERT_PRETRAIN_PATH)
load_model(model,
run_root / ('best-model-%d.pt' % args.fold),
multi2single=False)
model.cuda()
optimizer = BertAdam(model.parameters(), lr=1e-5, warmup=0.95)
model, optimizer = amp.initialize(model,
optimizer,
opt_level="O2",
verbosity=0)
if args.multi_gpu == 1:
model = nn.DataParallel(model)
validation(model,
criterion,
valid_df,
valid_loader,
args,
save_result=True,
progress=True)
def fine_tune(corpus_name, train_corpus, dev_corpus, column_names):
device = get_cuda_device()
train_corpus_df = parse_csv(train_corpus, column_names)
input_ids, labels, attention_masks = RENAME_ME(train_corpus_df,
corpus_name, True, MAX_LEN)
train_inputs, test_inputs, train_labels, test_labels = train_test_split(
input_ids, labels, random_state=RANDOM_STATE, test_size=TEST_SIZE)
train_masks, test_masks, _, _ = train_test_split(attention_masks,
input_ids,
random_state=RANDOM_STATE,
test_size=TEST_SIZE)
train_data_loader = get_data_loader(train_inputs, train_labels,
train_masks, BATCH_SIZE)
test_data_loader = get_data_loader(test_inputs, test_labels, test_masks,
BATCH_SIZE)
model = BertForSequenceClassification.from_pretrained(corpus_name,
num_labels=2)
model.cuda()
param_optimizer = list(model.named_parameters())
no_decay = ['bias', 'gamma', 'beta']
optimizer_grouped_parameters = [{
'params':
[p for n, p in param_optimizer if not any(nd in n for nd in no_decay)],
'weight_decay_rate':
0.01
}, {
'params':
[p for n, p in param_optimizer if any(nd in n for nd in no_decay)],
'weight_decay_rate':
0.0
}]
optimizer = BertAdam(optimizer_grouped_parameters, lr=2e-5, warmup=.1)
for _ in range(EPOCHS):
model.train()
for step, batch in enumerate(train_data_loader):
input_ids, mask, labels = tuple(t.to(device) for t in batch)
optimizer.zero_grad()
loss = model(input_ids,
token_type_ids=None,
attention_mask=mask,
labels=labels)
loss.backward()
optimizer.step()
model.eval()
for batch in test_data_loader:
input_ids, mask, labels = tuple(t.to(device) for t in batch)
with torch.no_grad():
logits = model(input_ids,
token_type_ids=None,
attention_mask=mask)
#logits = logits.detach().cpu().numpy()
#label_ids = labels.to('cpu').numpy()
dev_corpus_df = parse_csv(dev_corpus, column_names)
dev_input_ids, dev_labels, dev_attentions_masks = RENAME_ME(
dev_corpus_df, corpus_name, True, MAX_LEN)
dev_data_loader = get_data_loader(dev_input_ids, dev_labels, dev_masks,
BATCH_SIZE)
model.eval()
predictions = []
true_labels = []
for batch in prediction_data_loader:
input_ids, mask, labels = tuple(t.to(device) for t in batch)
with torch.no_grad():
logits = model(input_ids, token_type_ids=None, attention_mask=mask)
logits = logits.detach().cpu().numpy()
label_ids = labels.to('cpu').numpy()
predictions.append(logits)
true_labels.append(label_ids)
matthews_set = []
for true_label, prediction in zip(true_labels, predictions):
matthews = matthews_corrcoef(true_label,
np.argmax(prediction, axis=1).flatten())
matthews_set.append(matthews)
flat_predictions = [item for sublist in predictions for item in sublist]
flat_predictions = np.argmax(flat_predictions, axis=1).flatten()
flat_true_labels = [item for sublist in true_labels for item in sublist]
matthews_corrcoef(flat_true_labels, flat_predictions)
class MTDNNModel(object):
def __init__(self,
opt,
state_dict=None,
num_train_step=-1,
use_parse=False,
embedding_matrix=None,
token2idx=None,
stx_parse_dim=None,
unked_words=None,
use_generic_features=False,
num_generic_features=None,
use_domain_features=False,
num_domain_features=None,
feature_dim=None):
self.config = opt
self.updates = state_dict[
'updates'] if state_dict and 'updates' in state_dict else 0
self.train_loss = AverageMeter()
self.network = SANBertNetwork(
opt,
use_parse=use_parse,
embedding_matrix=embedding_matrix,
token2idx=token2idx,
stx_parse_dim=stx_parse_dim,
unked_words=unked_words,
use_generic_features=use_generic_features,
num_generic_features=num_generic_features,
use_domain_features=use_domain_features,
num_domain_features=num_domain_features,
feature_dim=feature_dim)
if state_dict:
new_state = set(self.network.state_dict().keys())
for k in list(state_dict['state'].keys()):
if k not in new_state:
del state_dict['state'][k]
for k, v in list(self.network.state_dict().items()):
if k not in state_dict['state']:
state_dict['state'][k] = v
self.network.load_state_dict(state_dict['state'])
self.mnetwork = nn.DataParallel(
self.network) if opt['multi_gpu_on'] else self.network
self.total_param = sum([
p.nelement() for p in self.network.parameters() if p.requires_grad
])
no_decay = [
'bias', 'gamma', 'beta', 'LayerNorm.bias', 'LayerNorm.weight'
]
optimizer_parameters = [{
'params': [
p for n, p in self.network.named_parameters()
if n not in no_decay
],
'weight_decay_rate':
0.01
}, {
'params':
[p for n, p in self.network.named_parameters() if n in no_decay],
'weight_decay_rate':
0.0
}]
# note that adamax are modified based on the BERT code
if opt['optimizer'] == 'sgd':
self.optimizer = optim.sgd(optimizer_parameters,
opt['learning_rate'],
weight_decay=opt['weight_decay'])
elif opt['optimizer'] == 'adamax':
self.optimizer = Adamax(optimizer_parameters,
opt['learning_rate'],
warmup=opt['warmup'],
t_total=num_train_step,
max_grad_norm=opt['grad_clipping'],
schedule=opt['warmup_schedule'])
if opt.get('have_lr_scheduler', False):
opt['have_lr_scheduler'] = False
elif opt['optimizer'] == 'adadelta':
self.optimizer = optim.Adadelta(optimizer_parameters,
opt['learning_rate'],
rho=0.95)
elif opt['optimizer'] == 'adam':
self.optimizer = Adam(optimizer_parameters,
lr=opt['learning_rate'],
warmup=opt['warmup'],
t_total=num_train_step,
max_grad_norm=opt['grad_clipping'],
schedule=opt['warmup_schedule'])
if opt.get('have_lr_scheduler', False):
opt['have_lr_scheduler'] = False
else:
raise RuntimeError('Unsupported optimizer: %s' % opt['optimizer'])
if state_dict and 'optimizer' in state_dict:
self.optimizer.load_state_dict(state_dict['optimizer'])
if opt.get('have_lr_scheduler', False):
if opt.get('scheduler_type', 'rop') == 'rop':
self.scheduler = ReduceLROnPlateau(self.optimizer,
mode='max',
factor=opt['lr_gamma'],
patience=3)
elif opt.get('scheduler_type', 'rop') == 'exp':
self.scheduler = ExponentialLR(self.optimizer,
gamma=opt.get('lr_gamma', 0.95))
else:
milestones = [
int(step)
for step in opt.get('multi_step_lr', '10,20,30').split(',')
]
self.scheduler = MultiStepLR(self.optimizer,
milestones=milestones,
gamma=opt.get('lr_gamma'))
else:
self.scheduler = None
self.ema = None
if opt['ema_opt'] > 0:
self.ema = EMA(self.config['ema_gamma'], self.network)
self.para_swapped = False
def setup_ema(self):
if self.config['ema_opt']:
self.ema.setup()
def update_ema(self):
if self.config['ema_opt']:
self.ema.update()
def eval(self):
if self.config['ema_opt']:
self.ema.swap_parameters()
self.para_swapped = True
def train(self):
if self.para_swapped:
self.ema.swap_parameters()
self.para_swapped = False
def _value_for(self, key, batch_data, batch_meta):
return batch_data[batch_meta[key]] if key in batch_meta else None
def update(self,
batch_meta,
batch_data,
bin_parse_as=None,
bin_parse_bs=None,
parse_as_mask=None,
parse_bs_mask=None,
generic_features=None,
domain_features=None):
self.network.train()
labels = batch_data[batch_meta['label']]
if batch_meta['pairwise']:
labels = labels.contiguous().view(-1,
batch_meta['pairwise_size'])[:,
0]
if self.config['cuda']:
y = Variable(labels.cuda(non_blocking=True), requires_grad=False)
else:
y = Variable(labels, requires_grad=False)
task_id = batch_meta['task_id']
task_type = batch_meta['task_type']
inputs = batch_data[:batch_meta['input_len']]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
logits = self.mnetwork(
*inputs,
bin_parse_as=self._value_for('parse_ids_a', batch_data,
batch_meta),
bin_parse_bs=self._value_for('parse_ids_b', batch_data,
batch_meta),
parse_as_mask=self._value_for('parse_masks_a', batch_data,
batch_meta),
parse_bs_mask=self._value_for('parse_masks_b', batch_data,
batch_meta),
generic_features=self._value_for('generic_features', batch_data,
batch_meta),
domain_features=self._value_for('domain_features', batch_data,
batch_meta))
if batch_meta['pairwise']:
logits = logits.view(-1, batch_meta['pairwise_size'])
if self.config.get('weighted_on', False):
if self.config['cuda']:
weight = Variable(
batch_data[batch_meta['factor']].cuda(non_blocking=True))
else:
weight = Variable(batch_data[batch_meta['factor']])
if task_type > 0:
loss = torch.mean(
F.mse_loss(logits.squeeze(), y, reduce=False) * weight)
else:
loss = torch.mean(
F.cross_entropy(logits, y, reduce=False) * weight)
else:
if task_type > 0:
loss = F.mse_loss(logits.squeeze(), y)
else:
loss = F.cross_entropy(logits, y)
self.train_loss.update(loss.item(), logits.size(0))
self.optimizer.zero_grad()
loss.backward()
if self.config['global_grad_clipping'] > 0:
torch.nn.utils.clip_grad_norm_(self.network.parameters(),
self.config['global_grad_clipping'])
self.optimizer.step()
self.updates += 1
self.update_ema()
def predict(self,
batch_meta,
batch_data,
bin_parse_as=None,
bin_parse_bs=None,
parse_as_mask=None,
parse_bs_mask=None,
generic_features=None,
domain_features=None):
self.network.eval()
task_id = batch_meta['task_id']
task_type = batch_meta['task_type']
inputs = batch_data[:batch_meta['input_len']]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
with torch.no_grad():
score = self.network(
*inputs,
bin_parse_as=self._value_for('parse_ids_a', batch_data,
batch_meta),
bin_parse_bs=self._value_for('parse_ids_b', batch_data,
batch_meta),
parse_as_mask=self._value_for('parse_masks_a', batch_data,
batch_meta),
parse_bs_mask=self._value_for('parse_masks_b', batch_data,
batch_meta),
generic_features=self._value_for('generic_features',
batch_data, batch_meta),
domain_features=self._value_for('domain_features', batch_data,
batch_meta))
if batch_meta['pairwise']:
score = score.contiguous().view(-1, batch_meta['pairwise_size'])
if task_type < 1:
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.zeros(score.shape, dtype=int)
positive = np.argmax(score, axis=1)
for idx, pos in enumerate(positive):
predict[idx, pos] = 1
predict = predict.reshape(-1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta['true_label']
else:
if task_type < 1:
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta['label']
def save(self, filename):
network_state = dict([(k, v.cpu())
for k, v in self.network.state_dict().items()])
ema_state = dict([
(k, v.cpu()) for k, v in self.ema.model.state_dict().items()
]) if self.ema is not None else dict()
params = {
'state': network_state,
#'optimizer': self.optimizer.state_dict(),
'ema': ema_state,
'config': self.config,
}
torch.save(params, filename)
logger.info('model saved to {}'.format(filename))
def cuda(self):
self.network.cuda()
if self.config['ema_opt']:
self.ema.cuda()
def train(args):
label_name = ['fake', 'real']
device = torch.device("cuda:0" if args['CUDA'] == 'gpu' else "cpu")
prefix = args['MODEL'] + '_' + args['BERT_CONFIG']
bert_size = args['BERT_CONFIG'].split('-')[1]
start_time = time.time()
print('Importing data...', file=sys.stderr)
df_train = pd.read_csv(args['--train'], index_col=0)
df_val = pd.read_csv(args['--dev'], index_col=0)
train_label = dict(df_train.information_label.value_counts())
print("Train label", train_label)
label_max = float(max(train_label.values()))
print("Label max", label_max)
train_label_weight = torch.tensor(
[label_max / train_label[i] for i in range(len(train_label))],
device=device)
print(train_label_weight)
print('Done! time elapsed %.2f sec' % (time.time() - start_time),
file=sys.stderr)
print('-' * 80, file=sys.stderr)
start_time = time.time()
print('Set up model...', file=sys.stderr)
if args['MODEL'] == 'cnn':
model = CustomBertConvModel(args['BERT_CONFIG'],
device,
float(args['--dropout']),
len(label_name),
out_channel=int(args['--out-channel']))
optimizer = BertAdam([{
'params': model.bert.parameters()
}, {
'params': model.conv.parameters(),
'lr': float(args['--lr'])
}, {
'params': model.hidden_to_softmax.parameters(),
'lr': float(args['--lr'])
}],
lr=float(args['--lr-bert']),
max_grad_norm=float(args['--clip-grad']))
elif args['MODEL'] == 'lstm':
model = CustomBertLSTMModel(args['BERT_CONFIG'],
device,
float(args['--dropout']),
len(label_name),
lstm_hidden_size=int(
args['--hidden-size']))
optimizer = BertAdam([{
'params': model.bert.parameters()
}, {
'params': model.lstm.parameters(),
'lr': float(args['--lr'])
}, {
'params': model.hidden_to_softmax.parameters(),
'lr': float(args['--lr'])
}],
lr=float(args['--lr-bert']),
max_grad_norm=float(args['--clip-grad']))
else:
print('please input valid model')
exit(0)
model = model.to(device)
print('Use device: %s' % device, file=sys.stderr)
print('Done! time elapsed %.2f sec' % (time.time() - start_time),
file=sys.stderr)
print('-' * 80, file=sys.stderr)
model.train()
cn_loss = torch.nn.CrossEntropyLoss(weight=train_label_weight,
reduction='mean')
torch.save(cn_loss, 'loss_func') # for later testing
train_batch_size = int(args['--batch-size'])
valid_niter = int(args['--valid-niter'])
log_every = int(args['--log-every'])
model_save_path = prefix + '_model.bin'
num_trial = 0
train_iter = patience = cum_loss = report_loss = 0
cum_examples = report_examples = epoch = 0
hist_valid_scores = []
train_time = begin_time = time.time()
print('Begin Maximum Likelihood training...')
while True:
epoch += 1
for sents, targets in batch_iter(df_train,
batch_size=train_batch_size,
shuffle=True,
bert=bert_size): # for each epoch
train_iter += 1 # increase training iteration
# set gradients to zero before starting to do backpropagation.
# Pytorch accummulates the gradients on subsequnt backward passes.
optimizer.zero_grad()
batch_size = len(sents)
pre_softmax = model(sents).double()
loss = cn_loss(
pre_softmax,
torch.tensor(targets, dtype=torch.long, device=device))
# The gradients are "stored" by the tensors themselves once you call backwards
# on the loss.
loss.backward()
'''
After computing the gradients for all tensors in the model, calling optimizer.step() makes the optimizer iterate over
all parameters (tensors) it is supposed to update and use their internally stored grad to update their values.
'''
optimizer.step()
# loss.item() contains the loss for the mini-batch, but divided by the batch_size
# that's why multiply by the batch_size
batch_losses_val = loss.item() * batch_size
report_loss += batch_losses_val
cum_loss += batch_losses_val
report_examples += batch_size
cum_examples += batch_size
if train_iter % log_every == 0:
print('epoch %d, iter %d, avg. loss %.2f, '
'cum. examples %d, speed %.2f examples/sec, '
'time elapsed %.2f sec' %
(epoch, train_iter, report_loss / report_examples,
cum_examples, report_examples /
(time.time() - train_time), time.time() - begin_time),
file=sys.stderr)
train_time = time.time()
report_loss = report_examples = 0.
# perform validation
if train_iter % valid_niter == 0:
print(
'epoch %d, iter %d, cum. loss %.2f, cum. examples %d' %
(epoch, train_iter, cum_loss / cum_examples, cum_examples),
file=sys.stderr)
cum_loss = cum_examples = 0
print('begin validation....', file=sys.stderr)
validation_loss = validation(
model, df_val, bert_size, cn_loss,
device) # dev batch size can be a bit larger
print('validation: iter %d, loss %f' %
(train_iter, validation_loss),
file=sys.stderr)
is_better = len(
hist_valid_scores
) == 0 or validation_loss < min(hist_valid_scores)
hist_valid_scores.append(validation_loss)
if is_better:
patience = 0
print('save currently the best model to [%s]' %
model_save_path,
file=sys.stderr)
model.save(model_save_path)
# also save the optimizers' state
torch.save(optimizer.state_dict(),
model_save_path + '.optim')
elif patience < int(args['--patience']):
patience += 1
print('hit patience %d' % patience, file=sys.stderr)
if patience == int(args['--patience']):
num_trial += 1
print('hit #%d trial' % num_trial, file=sys.stderr)
if num_trial == int(args['--max-num-trial']):
print('early stop!', file=sys.stderr)
exit(0)
# decay lr, and restore from previously best checkpoint
print(
'load previously best model and decay learning rate to %f%%'
% (float(args['--lr-decay']) * 100),
file=sys.stderr)
# load model
params = torch.load(
model_save_path,
map_location=lambda storage, loc: storage)
model.load_state_dict(params['state_dict'])
model = model.to(device)
print('restore parameters of the optimizers',
file=sys.stderr)
optimizer.load_state_dict(
torch.load(model_save_path + '.optim'))
# set new lr
for param_group in optimizer.param_groups:
param_group['lr'] *= float(args['--lr-decay'])
# reset patience
patience = 0
if epoch == int(args['--max-epoch']):
print('reached maximum number of epochs!', file=sys.stderr)
exit(0)
def train_topic(st, tt):
device = torch.device("cuda:1")
# with open('train_sem_mask.pickle', 'rb') as f:
# train_dataeval_mask_set = pickle.load(f)
# with open('test_sem_mask.pickle', 'rb') as f:
# test_dataeval_mask_set = pickle.load(f)
# with open('train_sem.pickle', 'rb') as f:
# train_dataeval_set = pickle.load(f)
# with open('test_sem.pickle', 'rb') as f:
# test_dataeval_set = pickle.load(f)
# with open('framenet.pickle', 'rb') as f:
# test_framenet_set = pickle.load(f)
# with open('framenet_mask.pickle', 'rb') as f:
# test_framenet_mask_set = pickle.load(f)
# with open('data_seen.pickle', 'rb') as f:
# data = pickle.load(f)
# train_set, test_set = data['train'], data['test']
# with open('data_seen_mask.pickle', 'rb') as f:
# data = pickle.load(f)
# train_set_mask, test_set_mask = data['train'], data['test']
### Reading data...
with open('data.pickle', 'rb') as f:
data = pickle.load(f)
# train_set, test_set = split_train_test(data)
train_set = get_topic(data, st)
test_set = get_topic(data, tt)
with open('data_mask.pickle', 'rb') as f:
data_mask = pickle.load(f)
#train_set_mask, test_set_mask = split_train_test(data)
train_set_mask = get_topic(data_mask, st)
test_set_mask = get_topic(data_mask, tt)
test_set, test_set_mask = test_set, test_set_mask
train_pair = list(zip(train_set, train_set_mask))
train_pair = negative_sampling(train_pair, 0.8)
train_set, train_set_mask = [d[0] for d in train_pair
], [d[1] for d in train_pair]
###
test_dataset = Dataset(10, test_set)
test_dataset_mask = Dataset(10, test_set_mask)
test_dataset_batch = [
batch for batch in test_dataset.reader(device, False)
]
test_dataset_mask_batch = [
batch for batch in test_dataset_mask.reader(device, False)
]
test_dataset_mix = list(zip(test_dataset_batch, test_dataset_mask_batch))
###
train_dataset = Dataset(20, train_set)
train_dataset_mask = Dataset(20, train_set_mask)
train_dataset_batch = [
batch for batch in train_dataset.reader(device, False)
]
train_dataset_mask_batch = [
batch for batch in train_dataset_mask.reader(device, False)
]
train_dataset_mix = list(zip(train_dataset_batch,
train_dataset_mask_batch))
model = BertCausalModel(3).to(device)
model_mask = BertCausalModel(3).to(device)
learning_rate = 1e-5
optimizer = BertAdam(model.parameters(), lr=learning_rate)
optimizer_mask = BertAdam(model_mask.parameters(), lr=learning_rate)
loss_fn = torch.nn.CrossEntropyLoss(reduction='sum')
for _ in range(0, 20):
idx = 0
for batch, batch_mask in tqdm(train_dataset_mix,
mininterval=2,
total=len(train_dataset_mix),
file=sys.stdout,
ncols=80):
idx += 1
model.train()
model_mask.train()
sentences_s, mask_s, sentences_t, mask_t, event1, event1_mask, event2, event2_mask, data_y, _ = batch
sentences_s_mask = batch_mask[0]
opt = model.forward_logits(sentences_s, mask_s, sentences_t,
mask_t, event1, event1_mask, event2,
event2_mask)
opt_mask = model_mask.forward_logits(sentences_s_mask, mask_s,
sentences_t, mask_t, event1,
event1_mask, event2,
event2_mask)
opt_mix = torch.cat([opt, opt_mask], dim=-1)
logits = model.additional_fc(opt_mix)
loss = loss_fn(logits, data_y)
optimizer.zero_grad()
optimizer_mask.zero_grad()
loss.backward()
optimizer.step()
optimizer_mask.step()
model.eval()
model_mask.eval()
with torch.no_grad():
predicted_all = []
gold_all = []
for batch, batch_mask in test_dataset_mix:
sentences_s, mask_s, sentences_t, mask_t, event1, event1_mask, event2, event2_mask, data_y, _ = batch
sentences_s_mask = batch_mask[0]
opt = model.forward_logits(sentences_s, mask_s, sentences_t,
mask_t, event1, event1_mask, event2,
event2_mask)
opt_mask = model_mask.forward_logits(sentences_s_mask, mask_s,
sentences_t, mask_t,
event1, event1_mask,
event2, event2_mask)
opt_mix = torch.cat([opt, opt_mask], dim=-1)
logits = model.additional_fc(opt_mix)
predicted = torch.argmax(logits, -1)
predicted = list(predicted.cpu().numpy())
predicted_all += predicted
gold = list(data_y.cpu().numpy())
gold_all += gold
p, r, f = compute_f1(gold_all, predicted_all)
print(p, r, f)
print('Here')
class ClassificationModel:
def __init__(self, bert_model=config.bert_model, gpu=False, seed=0):
self.gpu = gpu
self.bert_model = bert_model
self.train_df = data_reader.load_train_dataset(config.data_path)
self.val_df = data_reader.load_dev_dataset(config.data_path)
self.test_df = data_reader.load_test_dataset(config.data_path)
self.num_classes = len(LABELS)
self.model = None
self.optimizer = None
self.tokenizer = BertTokenizer.from_pretrained(self.bert_model)
# to plot loss during training process
self.plt_x = []
self.plt_y = []
random.seed(seed)
np.random.seed(seed)
torch.manual_seed(seed)
if self.gpu:
torch.cuda.manual_seed_all(seed)
def __init_model(self):
if self.gpu:
self.device = torch.device("cuda")
else:
self.device = torch.device("cpu")
self.model.to(self.device)
print(torch.cuda.memory_allocated(self.device))
# log available cuda
if self.device.type == 'cuda':
print(torch.cuda.get_device_name(0))
print('Memory Usage:')
print('Allocated:',
round(torch.cuda.memory_allocated(0) / 1024**3, 1), 'GB')
print('Cached: ',
round(torch.cuda.memory_cached(0) / 1024**3, 1), 'GB')
def new_model(self):
self.model = BertForSequenceClassification.from_pretrained(
self.bert_model, num_labels=self.num_classes)
self.__init_model()
def load_model(self, path_model, path_config):
self.model = BertForSequenceClassification(BertConfig(path_config),
num_labels=self.num_classes)
self.model.load_state_dict(torch.load(path_model))
self.__init_model()
def save_model(self, path_model, path_config, epoch_n, acc, f1):
if not os.path.exists(path_model):
os.makedirs(path_model)
model_save_path = os.path.join(
path_model, 'model_{:.4f}_{:.4f}_{:.4f}'.format(epoch_n, acc, f1))
torch.save(self.model.state_dict(), model_save_path)
if not os.path.exists(path_config):
os.makedirs(path_config)
model_config_path = os.path.join(path_config, 'config.cf')
with open(model_config_path, 'w') as f:
f.write(self.model.config.to_json_string())
def train(self,
epochs,
batch_size=config.batch_size,
lr=config.lr,
plot_path=None,
model_path=None,
config_path=None):
model_params = list(self.model.named_parameters())
no_decay = ['bias', 'LayerNorm.bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params': [
p for n, p in model_params
if not any(nd in n for nd in no_decay)
],
'weight_decay':
0.01
}, {
'params':
[p for n, p in model_params if any(nd in n for nd in no_decay)],
'weight_decay':
0.0
}]
self.optimizer = BertAdam(
optimizer_grouped_parameters,
lr=lr,
warmup=0.1,
t_total=int(len(self.train_df) / batch_size) * epochs)
nb_tr_steps = 0
train_features = data_reader.convert_examples_to_features(
self.train_df, config.MAX_SEQ_LENGTH, self.tokenizer)
# create tensor of all features
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)
# eval dataloader
eval_features = data_reader.convert_examples_to_features(
self.val_df, config.MAX_SEQ_LENGTH, self.tokenizer)
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_label_ids = torch.tensor([f.label_id for f in eval_features],
dtype=torch.long)
eval_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_label_ids)
eval_sampler = SequentialSampler(eval_data)
eval_dataloader = DataLoader(eval_data,
sampler=eval_sampler,
batch_size=batch_size)
# class weighting
_, counts = np.unique(self.train_df['label'], return_counts=True)
class_weights = [sum(counts) / c for c in counts]
# assign wight to each input sample
example_weights = [class_weights[e] for e in self.train_df['label']]
sampler = WeightedRandomSampler(example_weights,
len(self.train_df['label']))
train_dataloader = DataLoader(train_data,
sampler=sampler,
batch_size=batch_size)
self.model.train()
for e in range(epochs):
print("Epoch {}".format(e))
if e is not 0:
f1, acc = self.val(eval_dataloader)
print("\nF1 score: {}, Accuracy: {}".format(f1, acc))
if model_path is not None and config_path is not None:
if e is not 0:
self.save_model(model_path, config_path, e, acc, f1)
for step, batch in enumerate(
tqdm(train_dataloader, desc="Iteration")):
batch = tuple(t.to(self.device) for t in batch)
input_ids, input_mask, segment_ids, label_ids = batch
loss = self.model(input_ids, segment_ids, input_mask,
label_ids)
loss.backward()
#if plot_path is not None:
# self.plt_y.append(loss.item())
# self.plt_x.append(nb_tr_steps)
# self.save_plot(plot_path)
nb_tr_steps += 1
self.optimizer.step()
self.optimizer.zero_grad()
if self.gpu:
torch.cuda.empty_cache()
def val(self, eval_dataloader, batch_size=config.batch_size):
f1, acc = 0, 0
nb_eval_examples = 0
for input_ids, input_mask, segment_ids, gnd_labels in tqdm(
eval_dataloader, desc="Evaluating"):
input_ids = input_ids.to(self.device)
input_mask = input_mask.to(self.device)
segment_ids = segment_ids.to(self.device)
with torch.no_grad():
logits = self.model(input_ids, segment_ids, input_mask)
predicted_labels = np.argmax(logits.detach().cpu().numpy(), axis=1)
acc += np.sum(predicted_labels == gnd_labels.numpy())
tmp_eval_f1 = f1_score(predicted_labels,
gnd_labels,
average='macro')
f1 += tmp_eval_f1 * input_ids.size(0)
nb_eval_examples += input_ids.size(0)
return f1 / nb_eval_examples, acc / nb_eval_examples
def save_plot(self, path):
fig, ax = plt.subplots()
ax.plot(self.plt_x, self.plt_y)
ax.set(xlabel='Training steps', ylabel='Loss')
fig.savefig(path)
plt.close()
def create_test_predictions(self, path):
tests_features = data_reader.convert_examples_to_features(
self.x_test, [-1] * len(self.test_df), config.MAX_SEQ_LENGTH,
self.tokenizer)
all_input_ids = torch.tensor([f.input_ids for f in tests_features],
dtype=torch.long)
all_input_mask = torch.tensor([f.input_mask for f in tests_features],
dtype=torch.long)
all_segment_ids = torch.tensor([f.segment_ids for f in tests_features],
dtype=torch.long)
all_label_ids = torch.tensor([f.label_id for f in tests_features],
dtype=torch.long)
test_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_label_ids)
test_sampler = SequentialSampler(test_data)
test_dataloader = DataLoader(test_data,
sampler=test_sampler,
batch_size=16)
predictions = []
inverse_labels = {v: k for k, v in LABELS}
for input_ids, input_mask, segment_ids, gnd_labels in tqdm(
test_dataloader, desc="Evaluating"):
input_ids = input_ids.to(self.device)
input_mask = input_mask.to(self.device)
segment_ids = segment_ids.to(self.device)
with torch.no_grad():
encoded_layers, logits = self.model(input_ids, segment_ids,
input_mask)
predictions += [
inverse_labels[p]
for p in list(np.argmax(logits.detach().cpu().numpy(), axis=1))
]
with open(path, "w") as csv_file:
writer = csv.writer(csv_file, delimiter=',')
for i, prediction in enumerate(predictions):
writer.writerow([int(self.x_test_ids[i]), prediction])
return predictions
class MTDNNModel(object):
def __init__(self, opt, state_dict=None, num_train_step=-1):
self.config = opt
self.updates = state_dict[
'updates'] if state_dict and 'updates' in state_dict else 0
self.train_loss = AverageMeter()
self.network = SANBertNetwork(opt)
if state_dict:
new_state = set(self.network.state_dict().keys())
for k in list(state_dict['state'].keys()):
if k not in new_state:
del state_dict['state'][k]
for k, v in list(self.network.state_dict().items()):
if k not in state_dict['state']:
state_dict['state'][k] = v
self.network.load_state_dict(state_dict['state'])
self.mnetwork = nn.DataParallel(
self.network) if opt['multi_gpu_on'] else self.network
self.total_param = sum([
p.nelement() for p in self.network.parameters() if p.requires_grad
])
no_decay = [
'bias', 'gamma', 'beta', 'LayerNorm.bias', 'LayerNorm.weight'
]
optimizer_parameters = [{
'params': [
p for n, p in self.network.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
0.01
}, {
'params': [
p for n, p in self.network.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
# note that adamax are modified based on the BERT code
if opt['optimizer'] == 'sgd':
self.optimizer = optim.sgd(optimizer_parameters,
opt['learning_rate'],
weight_decay=opt['weight_decay'])
elif opt['optimizer'] == 'adamax':
self.optimizer = Adamax(optimizer_parameters,
opt['learning_rate'],
warmup=opt['warmup'],
t_total=num_train_step,
max_grad_norm=opt['grad_clipping'],
schedule=opt['warmup_schedule'])
if opt.get('have_lr_scheduler', False):
opt['have_lr_scheduler'] = False
elif opt['optimizer'] == 'adadelta':
self.optimizer = optim.Adadelta(optimizer_parameters,
opt['learning_rate'],
rho=0.95)
elif opt['optimizer'] == 'adam':
self.optimizer = Adam(optimizer_parameters,
lr=opt['learning_rate'],
warmup=opt['warmup'],
t_total=num_train_step,
max_grad_norm=opt['grad_clipping'],
schedule=opt['warmup_schedule'])
if opt.get('have_lr_scheduler', False):
opt['have_lr_scheduler'] = False
else:
raise RuntimeError('Unsupported optimizer: %s' % opt['optimizer'])
if state_dict and 'optimizer' in state_dict:
self.optimizer.load_state_dict(state_dict['optimizer'])
if opt.get('have_lr_scheduler', False):
if opt.get('scheduler_type', 'rop') == 'rop':
self.scheduler = ReduceLROnPlateau(self.optimizer,
mode='max',
factor=opt['lr_gamma'],
patience=3)
elif opt.get('scheduler_type', 'rop') == 'exp':
self.scheduler = ExponentialLR(self.optimizer,
gamma=opt.get('lr_gamma', 0.95))
else:
milestones = [
int(step)
for step in opt.get('multi_step_lr', '10,20,30').split(',')
]
self.scheduler = MultiStepLR(self.optimizer,
milestones=milestones,
gamma=opt.get('lr_gamma'))
else:
self.scheduler = None
self.ema = None
if opt['ema_opt'] > 0:
self.ema = EMA(self.config['ema_gamma'], self.network)
self.para_swapped = False
def setup_ema(self):
if self.config['ema_opt']:
self.ema.setup()
def update_ema(self):
if self.config['ema_opt']:
self.ema.update()
def eval(self):
if self.config['ema_opt']:
self.ema.swap_parameters()
self.para_swapped = True
def train(self):
if self.para_swapped:
self.ema.swap_parameters()
self.para_swapped = False
def update(self, batch_meta, batch_data):
self.network.train()
labels = batch_data[batch_meta['label']]
soft_labels = None
temperature = 1.0
if self.config.get('mkd_opt', 0) > 0 and ('soft_label' in batch_meta):
soft_labels = batch_meta['soft_label']
if batch_meta['pairwise']:
labels = labels.contiguous().view(-1,
batch_meta['pairwise_size'])[:,
0]
if self.config['cuda']:
y = Variable(labels.cuda(async=True), requires_grad=False)
else:
y = Variable(labels, requires_grad=False)
task_id = batch_meta['task_id']
task_type = batch_meta['task_type']
inputs = batch_data[:batch_meta['input_len']]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
logits = self.mnetwork(*inputs)
if batch_meta['pairwise']:
logits = logits.view(-1, batch_meta['pairwise_size'])
if self.config.get('weighted_on', False):
if self.config['cuda']:
weight = Variable(
batch_data[batch_meta['factor']].cuda(async=True))
else:
weight = Variable(batch_data[batch_meta['factor']])
if task_type > 0:
loss = torch.mean(
F.mse_loss(logits.squeeze(), y, reduce=False) * weight)
else:
loss = torch.mean(
F.cross_entropy(logits, y, reduce=False) * weight)
if soft_labels is not None:
# compute KL
label_size = soft_labels.size(1)
kd_loss = F.kl_div(
F.log_softmax(logits.view(-1, label_size).float(), 1),
soft_labels) * label_size
loss = loss + kd_loss
else:
if task_type > 0:
loss = F.mse_loss(logits.squeeze(), y)
else:
loss = F.cross_entropy(logits, y)
if soft_labels is not None:
# compute KL
label_size = soft_labels.size(1)
# note that kl_div return element-wised mean, thus it requires to time with the label size
# In the pytorch v1.x, it simply uses the flag: reduction='batchmean'
# TODO: updated the package to support the latest PyTorch (xiaodl)
kd_loss = F.kl_div(
F.log_softmax(logits.view(-1, label_size).float(), 1),
soft_labels) * label_size
loss = loss + kd_loss
self.train_loss.update(loss.item(), logits.size(0))
self.optimizer.zero_grad()
loss.backward()
if self.config['global_grad_clipping'] > 0:
torch.nn.utils.clip_grad_norm_(self.network.parameters(),
self.config['global_grad_clipping'])
self.optimizer.step()
self.updates += 1
self.update_ema()
def predict(self, batch_meta, batch_data):
self.network.eval()
task_id = batch_meta['task_id']
task_type = batch_meta['task_type']
inputs = batch_data[:batch_meta['input_len']]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
score = self.mnetwork(*inputs)
if batch_meta['pairwise']:
score = score.contiguous().view(-1, batch_meta['pairwise_size'])
if task_type < 1:
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.zeros(score.shape, dtype=int)
positive = np.argmax(score, axis=1)
for idx, pos in enumerate(positive):
predict[idx, pos] = 1
predict = predict.reshape(-1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta['true_label']
else:
if task_type < 1:
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta['label']
def extract(self, batch_meta, batch_data):
self.network.eval()
# 'token_id': 0; 'segment_id': 1; 'mask': 2
inputs = batch_data[:3]
all_encoder_layers, pooled_output = self.mnetwork.bert(*inputs)
return all_encoder_layers, pooled_output
def save(self, filename):
network_state = dict([(k, v.cpu())
for k, v in self.network.state_dict().items()])
ema_state = dict([
(k, v.cpu()) for k, v in self.ema.model.state_dict().items()
]) if self.ema is not None else dict()
params = {
'state': network_state,
'optimizer': self.optimizer.state_dict(),
'ema': ema_state,
'config': self.config,
}
torch.save(params, filename)
logger.info('model saved to {}'.format(filename))
def cuda(self):
self.network.cuda()
if self.config['ema_opt']:
self.ema.cuda()
class RelationModel(object):
""" A wrapper class for the training and evaluation of models. """
def __init__(self, opt, batch_num):
self.opt = opt
self.model = Extraction(opt)
self.model.cuda()
param_optimizer = list(self.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_rate':
0.01
}, {
'params':
[p for n, p in param_optimizer if any(nd in n for nd in no_decay)],
'weight_decay_rate':
0.0
}]
num_train_optimization_steps = batch_num * (opt['num_epoch'] + 1)
self.optimizer = BertAdam(optimizer_grouped_parameters,
lr=opt['lr'],
warmup=0.1,
t_total=num_train_optimization_steps)
self.bce = nn.BCELoss(reduction='none')
self.ema = layers.EMA(self.model, opt['ema'])
self.ema.register()
def update(self, batch, i):
""" Run a step of forward and backward model update. """
if self.opt['cuda']:
inputs = [Variable(torch.LongTensor(b).cuda()) for b in batch[:4]]
o_labels = Variable(torch.FloatTensor(batch[4]).cuda())
mask = Variable(torch.FloatTensor(batch[5]).cuda())
# step forward
self.model.train()
self.optimizer.zero_grad()
loss_mask = mask.unsqueeze(-1)
o_probs = self.model(inputs, mask)
o_probs = o_probs.pow(2)
o_loss = self.bce(o_probs, o_labels) # .view(batch_size, seq_len, 2)
o_loss = 0.5 * torch.sum(o_loss.mul(loss_mask)) / torch.sum(loss_mask)
loss = o_loss
# backward
loss.backward()
self.optimizer.step()
self.ema.update()
loss_val = loss.data.item()
return loss_val
def predict_obj_per_instance(self, inputs, mask, user_cuda=None):
""" Run forward prediction. If unsort is True, recover the original order of the batch. """
if self.opt['cuda']:
if user_cuda == None:
inputs = [Variable(torch.LongTensor(b).cuda()) for b in inputs]
mask = Variable(torch.FloatTensor(mask).cuda())
else:
inputs = [
Variable(torch.LongTensor(b).cuda(user_cuda))
for b in inputs
]
mask = Variable(torch.FloatTensor(mask).cuda(user_cuda))
self.model.eval()
words, distance_to_s, s_start, s_end = inputs
hidden, sentence_rep = self.model.based_encoder(words)
o_probs = self.model.o_sublayer(hidden, sentence_rep, distance_to_s,
s_start, s_end, mask)
o_probs = o_probs.pow(2)
o_probs = o_probs.mul(mask.unsqueeze(-1)).data.cpu().numpy()
return o_probs
def update_lr(self, new_lr):
torch_utils.change_lr(self.optimizer, new_lr)
def save(self, filename, epoch):
params = {
'model': self.model.state_dict(),
'config': self.opt,
'epoch': epoch
}
try:
torch.save(params, filename)
print("model saved to {}".format(filename))
except BaseException:
print("[Warning: Saving failed... continuing anyway.]")
def load(self, filename):
try:
checkpoint = torch.load(filename)
except BaseException:
print("Cannot load model from {}".format(filename))
exit()
self.model.load_state_dict(checkpoint['model'])
self.opt = checkpoint['config']
class MTDNNModel(object):
def __init__(self, opt, state_dict=None, num_train_step=-1):
self.config = opt
self.updates = state_dict[
'updates'] if state_dict and 'updates' in state_dict else 0
self.local_updates = 0
self.train_loss = AverageMeter()
self.network = SANBertNetwork(opt)
if state_dict:
self.network.load_state_dict(state_dict['state'], strict=False)
self.mnetwork = nn.DataParallel(
self.network) if opt['multi_gpu_on'] else self.network
self.total_param = sum([
p.nelement() for p in self.network.parameters() if p.requires_grad
])
if opt['cuda']:
self.network.cuda()
no_decay = [
'bias', 'gamma', 'beta', 'LayerNorm.bias', 'LayerNorm.weight'
]
optimizer_parameters = [{
'params': [
p for n, p in self.network.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
0.01
}, {
'params': [
p for n, p in self.network.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
# note that adamax are modified based on the BERT code
if opt['optimizer'] == 'sgd':
self.optimizer = optim.SGD(optimizer_parameters,
opt['learning_rate'],
weight_decay=opt['weight_decay'])
elif opt['optimizer'] == 'adamax':
self.optimizer = Adamax(optimizer_parameters,
opt['learning_rate'],
warmup=opt['warmup'],
t_total=num_train_step,
max_grad_norm=opt['grad_clipping'],
schedule=opt['warmup_schedule'],
weight_decay=opt['weight_decay'])
if opt.get('have_lr_scheduler', False):
opt['have_lr_scheduler'] = False
elif opt['optimizer'] == 'radam':
self.optimizer = RAdam(optimizer_parameters,
opt['learning_rate'],
warmup=opt['warmup'],
t_total=num_train_step,
max_grad_norm=opt['grad_clipping'],
schedule=opt['warmup_schedule'],
eps=opt['adam_eps'],
weight_decay=opt['weight_decay'])
if opt.get('have_lr_scheduler', False):
opt['have_lr_scheduler'] = False
# The current radam does not support FP16.
opt['fp16'] = False
elif opt['optimizer'] == 'adadelta':
self.optimizer = optim.Adadelta(optimizer_parameters,
opt['learning_rate'],
rho=0.95)
elif opt['optimizer'] == 'adam':
self.optimizer = Adam(optimizer_parameters,
lr=opt['learning_rate'],
warmup=opt['warmup'],
t_total=num_train_step,
max_grad_norm=opt['grad_clipping'],
schedule=opt['warmup_schedule'],
weight_decay=opt['weight_decay'])
if opt.get('have_lr_scheduler', False):
opt['have_lr_scheduler'] = False
else:
raise RuntimeError('Unsupported optimizer: %s' % opt['optimizer'])
if state_dict and 'optimizer' in state_dict:
self.optimizer.load_state_dict(state_dict['optimizer'])
if opt['fp16']:
try:
from apex import amp
global amp
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use fp16 training."
)
model, optimizer = amp.initialize(self.network,
self.optimizer,
opt_level=opt['fp16_opt_level'])
self.network = model
self.optimizer = optimizer
if opt.get('have_lr_scheduler', False):
if opt.get('scheduler_type', 'rop') == 'rop':
self.scheduler = ReduceLROnPlateau(self.optimizer,
mode='max',
factor=opt['lr_gamma'],
patience=3)
elif opt.get('scheduler_type', 'rop') == 'exp':
self.scheduler = ExponentialLR(self.optimizer,
gamma=opt.get('lr_gamma', 0.95))
else:
milestones = [
int(step)
for step in opt.get('multi_step_lr', '10,20,30').split(',')
]
self.scheduler = MultiStepLR(self.optimizer,
milestones=milestones,
gamma=opt.get('lr_gamma'))
else:
self.scheduler = None
self.ema = None
if opt['ema_opt'] > 0:
self.ema = EMA(self.config['ema_gamma'], self.network)
if opt['cuda']:
self.ema.cuda()
self.para_swapped = False
# zero optimizer grad
self.optimizer.zero_grad()
def setup_ema(self):
if self.config['ema_opt']:
self.ema.setup()
def update_ema(self):
if self.config['ema_opt']:
self.ema.update()
def eval(self):
if self.config['ema_opt']:
self.ema.swap_parameters()
self.para_swapped = True
def train(self):
if self.para_swapped:
self.ema.swap_parameters()
self.para_swapped = False
def update(self, batch_meta, batch_data):
self.network.train()
labels = batch_data[batch_meta['label']]
soft_labels = None
if self.config.get('mkd_opt', 0) > 0 and ('soft_label' in batch_meta):
soft_labels = batch_meta['soft_label']
task_type = batch_meta['task_type']
if task_type == TaskType.Span:
start = batch_data[batch_meta['start']]
end = batch_data[batch_meta['end']]
if self.config["cuda"]:
start = start.cuda(non_blocking=True)
end = end.cuda(non_blocking=True)
start.requires_grad = False
end.requires_grad = False
else:
y = labels
if task_type == TaskType.Ranking:
y = y.contiguous().view(-1, batch_meta['pairwise_size'])[:, 0]
if self.config['cuda']:
y = y.cuda(non_blocking=True)
y.requires_grad = False
task_id = batch_meta['task_id']
inputs = batch_data[:batch_meta['input_len']]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
if self.config.get('weighted_on', False):
if self.config['cuda']:
weight = batch_data[batch_meta['factor']].cuda(
non_blocking=True)
else:
weight = batch_data[batch_meta['factor']]
if task_type == TaskType.Span:
start_logits, end_logits = self.mnetwork(*inputs)
ignored_index = start_logits.size(1)
start.clamp_(0, ignored_index)
end.clamp_(0, ignored_index)
if self.config.get('weighted_on', False):
loss = torch.mean(F.cross_entropy(start_logits, start, reduce=False) * weight) + \
torch.mean(F.cross_entropy(end_logits, end, reduce=False) * weight)
else:
loss = F.cross_entropy(start_logits, start, ignore_index=ignored_index) + \
F.cross_entropy(end_logits, end, ignore_index=ignored_index)
loss = loss / 2
elif task_type == TaskType.SequenceLabeling:
y = y.view(-1)
logits = self.mnetwork(*inputs)
loss = F.cross_entropy(logits, y, ignore_index=-1)
else:
logits = self.mnetwork(*inputs)
if task_type == TaskType.Ranking:
logits = logits.view(-1, batch_meta['pairwise_size'])
if self.config.get('weighted_on', False):
if task_type == TaskType.Regression:
loss = torch.mean(
F.mse_loss(logits.squeeze(), y, reduce=False) * weight)
else:
loss = torch.mean(
F.cross_entropy(logits, y, reduce=False) * weight)
if soft_labels is not None:
# compute KL
label_size = soft_labels.size(1)
kd_loss = F.kl_div(F.log_softmax(
logits.view(-1, label_size).float(), 1),
soft_labels,
reduction='batchmean')
loss = loss + kd_loss
else:
if task_type == TaskType.Regression:
loss = F.mse_loss(logits.squeeze(), y)
else:
loss = F.cross_entropy(logits, y)
if soft_labels is not None:
# compute KL
label_size = soft_labels.size(1)
kd_loss = F.kl_div(F.log_softmax(
logits.view(-1, label_size).float(), 1),
soft_labels,
reduction='batchmean')
loss = loss + kd_loss
self.train_loss.update(loss.item(), logits.size(0))
# scale loss
loss = loss / self.config.get('grad_accumulation_step', 1)
if self.config['fp16']:
with amp.scale_loss(loss, self.optimizer) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.local_updates += 1
if self.local_updates % self.config.get('grad_accumulation_step',
1) == 0:
if self.config['global_grad_clipping'] > 0:
if self.config['fp16']:
torch.nn.utils.clip_grad_norm_(
amp.master_params(self.optimizer),
self.config['global_grad_clipping'])
else:
torch.nn.utils.clip_grad_norm_(
self.network.parameters(),
self.config['global_grad_clipping'])
self.updates += 1
# reset number of the grad accumulation
self.optimizer.step()
self.optimizer.zero_grad()
self.update_ema()
def predict(self, batch_meta, batch_data):
self.network.eval()
task_id = batch_meta['task_id']
task_type = batch_meta['task_type']
inputs = batch_data[:batch_meta['input_len']]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
score = self.mnetwork(*inputs)
if task_type == TaskType.Ranking:
score = score.contiguous().view(-1, batch_meta['pairwise_size'])
assert task_type == TaskType.Ranking
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.zeros(score.shape, dtype=int)
positive = np.argmax(score, axis=1)
for idx, pos in enumerate(positive):
predict[idx, pos] = 1
predict = predict.reshape(-1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta['true_label']
elif task_type == TaskType.SequenceLabeling:
mask = batch_data[batch_meta['mask']]
score = score.contiguous()
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).reshape(mask.size()).tolist()
valied_lenght = mask.sum(1).tolist()
final_predict = []
for idx, p in enumerate(predict):
final_predict.append(p[:valied_lenght[idx]])
score = score.reshape(-1).tolist()
return score, final_predict, batch_meta['label']
else:
if task_type == TaskType.Classification:
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta['label']
def extract(self, batch_meta, batch_data):
self.network.eval()
# 'token_id': 0; 'segment_id': 1; 'mask': 2
inputs = batch_data[:3]
all_encoder_layers, pooled_output = self.mnetwork.bert(*inputs)
return all_encoder_layers, pooled_output
def save(self, filename):
network_state = dict([(k, v.cpu())
for k, v in self.network.state_dict().items()])
ema_state = dict([
(k, v.cpu()) for k, v in self.ema.model.state_dict().items()
]) if self.ema is not None else dict()
params = {
'state': network_state,
'optimizer': self.optimizer.state_dict(),
'ema': ema_state,
'config': self.config,
}
torch.save(params, filename)
logger.info('model saved to {}'.format(filename))
def load(self, checkpoint):
model_state_dict = torch.load(checkpoint)
if model_state_dict['config']['init_checkpoint'].rsplit('/', 1)[1] != \
self.config['init_checkpoint'].rsplit('/', 1)[1]:
logger.error(
'*** SANBert network is pretrained on a different Bert Model. Please use that to fine-tune for other tasks. ***'
)
sys.exit()
self.network.load_state_dict(model_state_dict['state'], strict=False)
self.optimizer.load_state_dict(model_state_dict['optimizer'])
self.config = model_state_dict['config']
if self.ema:
self.ema.model.load_state_dict(model_state_dict['ema'])
def cuda(self):
self.network.cuda()
if self.config['ema_opt']:
self.ema.cuda()
def main():
torch.cuda.empty_cache()
device_name = tf.test.gpu_device_name()
if device_name != '/device:GPU:0':
raise SystemError('GPU device not found')
print('Found GPU at: {}'.format(device_name))
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
n_gpu = torch.cuda.device_count()
torch.cuda.get_device_name(0)
tokenizer = BertTokenizer.from_pretrained('bert-base-uncased',
do_lower_case=True)
#model.cuda()
scores_train = []
first_sent_train = []
second_sent_train = []
scores_test = []
first_sent_test = []
second_sent_test = []
sent_pairs = []
with open(train_data_path, encoding='utf-8') as fin:
train_data = fin.read().split('\n')
train_data = [line for line in train_data if line.strip()]
for line in train_data:
pair = []
line1 = line.split('\t')
if float(line1[4]) <= 2.5:
scores_train.append(0)
else:
scores_train.append(1)
first_sent_train.append(line1[5])
second_sent_train.append(line1[6])
pair.append(str(line1[5]))
pair.append(str(line1[6]))
sent_pairs.append(pair)
with open(test_data_path, encoding='utf-8') as fin:
test_data = fin.read().split('\n')
test_data = [line for line in test_data if line.strip()]
for line in test_data:
line1 = line.split('\t')
if float(line1[4]) <= 2.5:
scores_test.append(0)
else:
scores_test.append(1)
first_sent_test.append(line1[5])
second_sent_test.append(line1[6])
pairs_train = []
pairs_test = []
segment_ids_train = []
segment_ids_test = []
tokenized_pairs_train = []
tokenized_pairs_test = []
for sent1, sent2 in zip(first_sent_train, second_sent_train):
token1 = tokenizer.tokenize(sent1)
token2 = tokenizer.tokenize(sent2)
pair_tokens = []
pair_segment_ids = []
pair_tokens.append("[CLS] ")
pair_segment_ids.append(0)
for t in token1:
pair_tokens.append(t)
pair_segment_ids.append(0)
pair_tokens.append('[SEP]')
for t in token2:
pair_tokens.append(t)
pair_segment_ids.append(1)
pair_tokens.append('[SEP]')
pair_segment_ids.append(1)
tokenized_pairs_train.append(pair_tokens)
segment_ids_train.append(pair_segment_ids)
for sent1, sent2 in zip(first_sent_test, second_sent_test):
token1 = tokenizer.tokenize(sent1)
token2 = tokenizer.tokenize(sent2)
pair_tokens = []
pair_segment_ids = []
pair_tokens.append("[CLS] ")
pair_segment_ids.append(0)
for t in token1:
pair_tokens.append(t)
pair_segment_ids.append(0)
pair_tokens.append('[SEP]')
for t in token2:
pair_tokens.append(t)
pair_segment_ids.append(1)
pair_tokens.append('[SEP]')
pair_segment_ids.append(1)
tokenized_pairs_test.append(pair_tokens)
segment_ids_test.append(pair_segment_ids)
print("the first tokenized pair:")
print(tokenized_pairs_train[0])
print("the first segment ids:")
print(segment_ids_train[0])
input_ids_train = [
tokenizer.convert_tokens_to_ids(x) for x in tokenized_pairs_train
]
input_ids_train = pad_sequences(input_ids_train,
maxlen=MAX_LEN,
dtype="long",
truncating="post",
padding="post")
input_ids_test = [
tokenizer.convert_tokens_to_ids(x) for x in tokenized_pairs_test
]
input_ids_test = pad_sequences(input_ids_test,
maxlen=MAX_LEN,
dtype="long",
truncating="post",
padding="post")
segment_ids_train = pad_sequences(segment_ids_train,
maxlen=MAX_LEN,
dtype="long",
truncating="post",
padding="post")
segment_ids_test = pad_sequences(segment_ids_test,
maxlen=MAX_LEN,
dtype="long",
truncating="post",
padding="post")
#encoded = [tokenizer.encode(s, add_special_tokens=True) for s in sent_pairs]
#input_ids2 = torch.tensor([tokenizer.encode(s, add_special_tokens=True) for s in sent_pairs]).unsqueeze(0)
attention_masks_train = []
attention_masks_test = []
# Create a mask of 1s for each token followed by 0s for padding
for seq in input_ids_train:
seq_mask = [float(i > 0) for i in seq]
attention_masks_train.append(seq_mask)
for seq in input_ids_test:
seq_mask = [float(i > 0) for i in seq]
attention_masks_test.append(seq_mask)
# Convert all of our data into torch tensors, the required datatype for our model
train_inputs = torch.tensor(input_ids_train).to(torch.int64)
validation_inputs = torch.tensor(input_ids_test).to(torch.int64)
train_labels = torch.tensor(scores_train).float()
validation_labels = torch.tensor(scores_test).float()
train_masks = torch.tensor(attention_masks_train).to(torch.int64)
validation_masks = torch.tensor(attention_masks_test).to(torch.int64)
segment_ids_train = torch.tensor(segment_ids_train).to(torch.int64)
segment_ids_test = torch.tensor(segment_ids_test).to(torch.int64)
# Create an iterator of our data with torch DataLoader. This helps save on memory during training because, unlike a for loop,
# with an iterator the entire dataset does not need to be loaded into memory
train_data = TensorDataset(train_inputs, train_masks, train_labels,
segment_ids_train)
train_sampler = RandomSampler(train_data)
train_dataloader = DataLoader(train_data,
sampler=train_sampler,
batch_size=batch_size)
validation_data = TensorDataset(validation_inputs, validation_masks,
validation_labels, segment_ids_test)
validation_sampler = SequentialSampler(validation_data)
validation_dataloader = DataLoader(validation_data,
sampler=validation_sampler,
batch_size=batch_size)
#BertPreTrainedModel = BertModel.from_pretrained('bert-base-uncased')
model = BertSimilarity.from_pretrained('bert-base-uncased')
model = model.cuda()
# Set our model to training mode (as opposed to evaluation mode)
model.train()
param_optimizer = list(model.named_parameters())
no_decay = ['bias', 'gamma', 'beta']
optimizer_grouped_parameters = [{
'params':
[p for n, p in param_optimizer if not any(nd in n for nd in no_decay)],
'weight_decay_rate':
0.01
}, {
'params':
[p for n, p in param_optimizer if any(nd in n for nd in no_decay)],
'weight_decay_rate':
0.0
}]
optimizer = BertAdam(optimizer_grouped_parameters,
lr=learning_rate,
warmup=.1)
# Store our loss and accuracy for plotting
train_loss_set = []
accuracy = {}
# trange is a tqdm wrapper around the normal python range
for _ in trange(epochs, desc="Epoch"):
# Training
# Tracking variables
tr_loss = 0
nb_tr_examples, nb_tr_steps = 0, 0
# Train the data for one epoch
for step, batch in enumerate(train_dataloader):
# Add batch to GPU
batch = tuple(t.to(device) for t in batch)
# Unpack the inputs from our dataloader
b_input_ids, b_input_mask, b_labels, b_segment_ids = batch
# Clear out the gradients (by default they accumulate)
optimizer.zero_grad()
# Forward pass
probs = model(b_input_ids,
attention_mask=b_input_mask,
token_type_ids=b_segment_ids)
loss_func = torch.nn.BCELoss()
batch_loss = loss_func(probs, b_labels)
train_loss_set.append(batch_loss)
# Backward pass
batch_loss.backward()
# Update parameters and take a step using the computed gradient
optimizer.step()
# Update tracking variables
tr_loss += batch_loss
nb_tr_examples += b_input_ids.size(0)
nb_tr_steps += 1
print("Train loss: {}".format(tr_loss / nb_tr_steps))
accuracy['train_loss'] = tr_loss / nb_tr_steps
# Validation
# Put model in evaluation mode to evaluate loss on the validation set
model.eval()
# Tracking variables
eval_loss, eval_accuracy = 0, 0
nb_eval_steps, nb_eval_examples = 0, 0
# Evaluate data for one epoch
for batch in validation_dataloader:
# Add batch to GPU
batch = tuple(t.to(device) for t in batch)
# Unpack the inputs from our dataloader
b_input_ids, b_input_mask, b_labels, b_segment_ids = batch
# Telling the model not to compute or store gradients, saving memory and speeding up validation
with torch.no_grad():
# Forward pass, calculate logit predictions
sigmoid = model(b_input_ids,
attention_mask=b_input_mask,
token_type_ids=b_segment_ids)
# Move logits and labels to CPU
sigmoid = sigmoid.detach().cpu().numpy()
label_ids = b_labels.to('cpu').numpy()
tmp_eval_accuracy = flat_accuracy(sigmoid, label_ids)
eval_accuracy += tmp_eval_accuracy
nb_eval_steps += 1
accuracy['valid_loss'] = eval_accuracy / nb_eval_steps
print("Validation Accuracy: {}".format(eval_accuracy / nb_eval_steps))
print("Saving to output folder")
acc_filename = os.path.join(model_save_path, 'accuracy.json')
with open(acc_filename, 'w') as f:
json.dump(accuracy, f)
f.close()
train_loss_filename = os.path.join(model_save_path, 'trainloss.txt')
with open(train_loss_filename, 'w') as f:
f.writelines(train_loss_set)
model_to_save = model.module if hasattr(
model,
'module') else model # Take care of distributed/parallel training
model_to_save.save_pretrained(model_save_path)
tokenizer.save_pretrained(model_save_path)
#storage_client = storage.Client()
bucket_name = 'gs://gridspace-tts-data'
#bucket = storage_client.get_bucket(bucket_name)
cp_to_bucket_cmd = 'cp {} {}'.format(model_save_path, bucket_name)
subprocess.check_call(cp_to_bucket_cmd, shell=True)
class MTDNNModel(object):
def __init__(self, opt, state_dict=None, num_train_step=-1):
self.config = opt
self.updates = state_dict[
'updates'] if state_dict and 'updates' in state_dict else 0
self.local_updates = 0
self.train_loss = AverageMeter()
self.network = SANBertNetwork(opt)
if state_dict:
self.network.load_state_dict(state_dict['state'], strict=False)
self.mnetwork = nn.DataParallel(
self.network) if opt['multi_gpu_on'] else self.network
self.total_param = sum([
p.nelement() for p in self.network.parameters() if p.requires_grad
])
if opt['cuda']:
self.network.cuda()
optimizer_parameters = self._get_param_groups()
self._setup_optim(optimizer_parameters, state_dict, num_train_step)
self.para_swapped = False
self.optimizer.zero_grad()
self._setup_lossmap(self.config)
def _get_param_groups(self):
no_decay = [
'bias', 'gamma', 'beta', 'LayerNorm.bias', 'LayerNorm.weight'
]
optimizer_parameters = [{
'params': [
p for n, p in self.network.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
0.01
}, {
'params': [
p for n, p in self.network.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
return optimizer_parameters
def _setup_optim(self,
optimizer_parameters,
state_dict=None,
num_train_step=-1):
if self.config['optimizer'] == 'sgd':
self.optimizer = optim.SGD(
optimizer_parameters,
self.config['learning_rate'],
weight_decay=self.config['weight_decay'])
elif self.config['optimizer'] == 'adamax':
self.optimizer = Adamax(optimizer_parameters,
self.config['learning_rate'],
warmup=self.config['warmup'],
t_total=num_train_step,
max_grad_norm=self.config['grad_clipping'],
schedule=self.config['warmup_schedule'],
weight_decay=self.config['weight_decay'])
if self.config.get('have_lr_scheduler', False):
self.config['have_lr_scheduler'] = False
elif self.config['optimizer'] == 'radam':
self.optimizer = RAdam(optimizer_parameters,
self.config['learning_rate'],
warmup=self.config['warmup'],
t_total=num_train_step,
max_grad_norm=self.config['grad_clipping'],
schedule=self.config['warmup_schedule'],
eps=self.config['adam_eps'],
weight_decay=self.config['weight_decay'])
if self.config.get('have_lr_scheduler', False):
self.config['have_lr_scheduler'] = False
# The current radam does not support FP16.
self.config['fp16'] = False
elif self.config['optimizer'] == 'adam':
self.optimizer = Adam(optimizer_parameters,
lr=self.config['learning_rate'],
warmup=self.config['warmup'],
t_total=num_train_step,
max_grad_norm=self.config['grad_clipping'],
schedule=self.config['warmup_schedule'],
weight_decay=self.config['weight_decay'])
if self.config.get('have_lr_scheduler', False):
self.config['have_lr_scheduler'] = False
else:
raise RuntimeError('Unsupported optimizer: %s' % opt['optimizer'])
if state_dict and 'optimizer' in state_dict:
self.optimizer.load_state_dict(state_dict['optimizer'])
if self.config['fp16']:
try:
from apex import amp
global amp
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use fp16 training."
)
model, optimizer = amp.initialize(
self.network,
self.optimizer,
opt_level=self.config['fp16_opt_level'])
self.network = model
self.optimizer = optimizer
if self.config.get('have_lr_scheduler', False):
if self.config.get('scheduler_type', 'rop') == 'rop':
self.scheduler = ReduceLROnPlateau(
self.optimizer,
mode='max',
factor=self.config['lr_gamma'],
patience=3)
elif self.config.get('scheduler_type', 'rop') == 'exp':
self.scheduler = ExponentialLR(self.optimizer,
gamma=self.config.get(
'lr_gamma', 0.95))
else:
milestones = [
int(step) for step in self.config.get(
'multi_step_lr', '10,20,30').split(',')
]
self.scheduler = MultiStepLR(self.optimizer,
milestones=milestones,
gamma=self.config.get('lr_gamma'))
else:
self.scheduler = None
def _setup_lossmap(self, config):
loss_types = config['loss_types']
self.task_loss_criterion = []
for idx, cs in enumerate(loss_types):
assert cs is not None
lc = LOSS_REGISTRY[cs](
name='Loss func of task {}: {}'.format(idx, cs))
self.task_loss_criterion.append(lc)
def _setup_kd_lossmap(self, config):
loss_types = config['kd_loss_types']
self.kd_task_loss_criterion = []
if config.get('mkd_opt', 0) > 0:
for idx, cs in enumerate(loss_types):
assert cs is not None
lc = LOSS_REGISTRY[cs](
name='Loss func of task {}: {}'.format(idx, cs))
self.kd_task_loss_criterion.append(lc)
def train(self):
if self.para_swapped:
self.para_swapped = False
def _to_cuda(self, tensor):
if tensor is None: return tensor
if isinstance(tensor, list) or isinstance(tensor, tuple):
y = [e.cuda(non_blocking=True) for e in tensor]
for e in y:
e.requires_grad = False
else:
y = tensor.cuda(non_blocking=True)
y.requires_grad = False
return y
def update(self, batch_meta, batch_data):
self.network.train()
y = batch_data[batch_meta['label']]
soft_labels = None
task_type = batch_meta['task_type']
y = self._to_cuda(y) if self.config['cuda'] else y
task_id = batch_meta['task_id']
inputs = batch_data[:batch_meta['input_len']]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
weight = None
if self.config.get('weighted_on', False):
if self.config['cuda']:
weight = batch_data[batch_meta['factor']].cuda(
non_blocking=True)
else:
weight = batch_data[batch_meta['factor']]
logits = self.mnetwork(*inputs)
# compute loss
loss = 0
if self.task_loss_criterion[task_id] and (y is not None):
loss = self.task_loss_criterion[task_id](logits,
y,
weight,
ignore_index=-1)
# compute kd loss
if self.config.get('mkd_opt', 0) > 0 and ('soft_label' in batch_meta):
soft_labels = batch_meta['soft_label']
soft_labels = self._to_cuda(
soft_labels) if self.config['cuda'] else soft_labels
kd_lc = self.kd_task_loss_criterion[task_id]
kd_loss = kd_lc(logits, soft_labels, weight,
ignore_index=-1) if kd_lc else 0
loss = loss + kd_loss
self.train_loss.update(loss.item(),
batch_data[batch_meta['token_id']].size(0))
# scale loss
loss = loss / self.config.get('grad_accumulation_step', 1)
if self.config['fp16']:
with amp.scale_loss(loss, self.optimizer) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.local_updates += 1
if self.local_updates % self.config.get('grad_accumulation_step',
1) == 0:
if self.config['global_grad_clipping'] > 0:
if self.config['fp16']:
torch.nn.utils.clip_grad_norm_(
amp.master_params(self.optimizer),
self.config['global_grad_clipping'])
else:
torch.nn.utils.clip_grad_norm_(
self.network.parameters(),
self.config['global_grad_clipping'])
self.updates += 1
# reset number of the grad accumulation
self.optimizer.step()
self.optimizer.zero_grad()
def predict(self, batch_meta, batch_data):
self.network.eval()
task_id = batch_meta['task_id']
task_type = batch_meta['task_type']
inputs = batch_data[:batch_meta['input_len']]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
score = self.mnetwork(*inputs)
if task_type == TaskType.Ranking:
score = score.contiguous().view(-1, batch_meta['pairwise_size'])
assert task_type == TaskType.Ranking
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.zeros(score.shape, dtype=int)
positive = np.argmax(score, axis=1)
for idx, pos in enumerate(positive):
predict[idx, pos] = 1
predict = predict.reshape(-1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta['true_label']
elif task_type == TaskType.SeqenceLabeling:
mask = batch_data[batch_meta['mask']]
score = score.contiguous()
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).reshape(mask.size()).tolist()
valied_lenght = mask.sum(1).tolist()
final_predict = []
for idx, p in enumerate(predict):
final_predict.append(p[:valied_lenght[idx]])
score = score.reshape(-1).tolist()
return score, final_predict, batch_meta['label']
else:
if task_type == TaskType.Classification:
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta['label']
def extract(self, batch_meta, batch_data):
self.network.eval()
# 'token_id': 0; 'segment_id': 1; 'mask': 2
inputs = batch_data[:3]
all_encoder_layers, pooled_output = self.mnetwork.bert(*inputs)
return all_encoder_layers, pooled_output
def save(self, filename):
network_state = dict([(k, v.cpu())
for k, v in self.network.state_dict().items()])
params = {
'state': network_state,
'optimizer': self.optimizer.state_dict(),
'config': self.config,
}
torch.save(params, filename)
logger.info('model saved to {}'.format(filename))
def load(self, checkpoint):
model_state_dict = torch.load(checkpoint)
if model_state_dict['config']['init_checkpoint'].rsplit('/', 1)[1] != \
self.config['init_checkpoint'].rsplit('/', 1)[1]:
logger.error(
'*** SANBert network is pretrained on a different Bert Model. Please use that to fine-tune for other tasks. ***'
)
sys.exit()
self.network.load_state_dict(model_state_dict['state'], strict=False)
self.optimizer.load_state_dict(model_state_dict['optimizer'])
self.config = model_state_dict['config']
def cuda(self):
self.network.cuda()
class ClassificationModel:
def __init__(self,
task,
val=0.1,
bert_model=BERT_MODEL,
gpu=False,
seed=0):
self.gpu = gpu
self.task = task
self.bert_model = bert_model
self.x_train, self.y_train = load_train_dataset(self.task)
self.x_val = np.random.choice(self.x_train,
size=(int(val * len(self.x_train)), ),
replace=False)
self.y_val = np.random.choice(self.y_train,
size=(int(val * len(self.x_train)), ),
replace=False)
self.x_test_ids, self.x_test = load_test_dataset(self.task)
self.num_classes = len(TASK_LABELS[task])
self.model = None
self.optimizer = None
self.tokenizer = BertTokenizer.from_pretrained(self.bert_model)
self.plt_x = []
self.plt_y = []
random.seed(seed)
np.random.seed(seed)
torch.manual_seed(seed)
if self.gpu:
torch.cuda.manual_seed_all(seed)
def __init_model(self):
if self.gpu:
self.device = torch.device("cuda")
else:
self.device = torch.device("cpu")
self.model.to(self.device)
print(torch.cuda.memory_allocated(self.device))
def new_model(self):
self.model = BertForSequenceClassification.from_pretrained(
self.bert_model, num_labels=self.num_classes)
self.__init_model()
def load_model(self, path_model, path_config):
self.model = BertForSequenceClassification(BertConfig(path_config),
num_labels=self.num_classes)
self.model.load_state_dict(torch.load(path_model))
self.__init_model()
def save_model(self, path_model, path_config):
torch.save(self.model.state_dict(), path_model)
with open(path_config, 'w') as f:
f.write(self.model.config.to_json_string())
# noinspection PyArgumentList
def train(self,
epochs,
plot_path,
batch_size=32,
lr=5e-5,
model_path=None,
config_path=None):
model_params = list(self.model.named_parameters())
no_decay = ['bias', 'LayerNorm.bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params': [
p for n, p in model_params
if not any(nd in n for nd in no_decay)
],
'weight_decay':
0.01
}, {
'params':
[p for n, p in model_params if any(nd in n for nd in no_decay)],
'weight_decay':
0.0
}]
self.optimizer = BertAdam(optimizer_grouped_parameters,
lr=lr,
warmup=0.1,
t_total=int(len(self.x_train) / batch_size) *
epochs)
nb_tr_steps = 0
train_features = convert_examples_to_features(self.x_train,
self.y_train,
MAX_SEQ_LENGTH,
self.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_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)
_, counts = np.unique(self.y_train, return_counts=True)
class_weights = [sum(counts) / c for c in counts]
example_weights = [class_weights[e] for e in self.y_train]
sampler = WeightedRandomSampler(example_weights, len(self.y_train))
train_dataloader = DataLoader(train_data,
sampler=sampler,
batch_size=batch_size)
self.model.train()
for e in range(epochs):
print(f"Epoch {e}")
f1, acc = self.val()
print(f"\nF1 score: {f1}, Accuracy: {acc}")
if model_path is not None and config_path is not None:
self.save_model(model_path, config_path)
for step, batch in enumerate(
tqdm(train_dataloader, desc="Iteration")):
batch = tuple(t.to(self.device) for t in batch)
input_ids, input_mask, segment_ids, label_ids = batch
loss = self.model(input_ids, segment_ids, input_mask,
label_ids)
loss.backward()
self.plt_y.append(loss.item())
self.plt_x.append(nb_tr_steps)
self.save_plot(plot_path)
nb_tr_steps += 1
self.optimizer.step()
self.optimizer.zero_grad()
if self.gpu:
torch.cuda.empty_cache()
def val(self, batch_size=32, test=False):
eval_features = convert_examples_to_features(self.x_val, self.y_val,
MAX_SEQ_LENGTH,
self.tokenizer)
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_label_ids = torch.tensor([f.label_id for f in eval_features],
dtype=torch.long)
eval_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_label_ids)
eval_sampler = SequentialSampler(eval_data)
eval_dataloader = DataLoader(eval_data,
sampler=eval_sampler,
batch_size=batch_size)
f1, acc = 0, 0
nb_eval_examples = 0
for input_ids, input_mask, segment_ids, gnd_labels in tqdm(
eval_dataloader, desc="Evaluating"):
input_ids = input_ids.to(self.device)
input_mask = input_mask.to(self.device)
segment_ids = segment_ids.to(self.device)
with torch.no_grad():
logits = self.model(input_ids, segment_ids, input_mask)
predicted_labels = np.argmax(logits.detach().cpu().numpy(), axis=1)
acc += np.sum(predicted_labels == gnd_labels.numpy())
tmp_eval_f1 = f1_score(predicted_labels,
gnd_labels,
average='macro')
f1 += tmp_eval_f1 * input_ids.size(0)
nb_eval_examples += input_ids.size(0)
return f1 / nb_eval_examples, acc / nb_eval_examples
def save_plot(self, path):
import matplotlib.pyplot as plt
fig, ax = plt.subplots()
ax.plot(self.plt_x, self.plt_y)
ax.set(xlabel='Training steps', ylabel='Loss')
fig.savefig(path)
plt.close()
def create_test_predictions(self, path):
eval_features = convert_examples_to_features(self.x_test,
[-1] * len(self.x_test),
MAX_SEQ_LENGTH,
self.tokenizer)
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_label_ids = torch.tensor([f.label_id for f in eval_features],
dtype=torch.long)
eval_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_label_ids)
eval_sampler = SequentialSampler(eval_data)
eval_dataloader = DataLoader(eval_data,
sampler=eval_sampler,
batch_size=16)
predictions = []
inverse_labels = {v: k for k, v in TASK_LABELS[self.task].items()}
for input_ids, input_mask, segment_ids, gnd_labels in tqdm(
eval_dataloader, desc="Evaluating"):
input_ids = input_ids.to(self.device)
input_mask = input_mask.to(self.device)
segment_ids = segment_ids.to(self.device)
with torch.no_grad():
logits = self.model(input_ids, segment_ids, input_mask)
predictions += [
inverse_labels[p]
for p in list(np.argmax(logits.detach().cpu().numpy(), axis=1))
]
with open(path, "w") as csv_file:
writer = csv.writer(csv_file, delimiter=',')
for i, prediction in enumerate(predictions):
writer.writerow([int(self.x_test_ids[i]), prediction])
return predictions
class MTDNNModel(object):
def __init__(self, opt, state_dict=None, num_train_step=-1):
self.config = opt
self.updates = state_dict['updates'] if state_dict and 'updates' in state_dict else 0
self.local_updates = 0
self.train_loss = AverageMeter()
self.initial_from_local = True if state_dict else False
self.network = SANBertNetwork(opt, initial_from_local=self.initial_from_local)
if state_dict:
missing_keys, unexpected_keys = self.network.load_state_dict(state_dict['state'], strict=False)
self.mnetwork = nn.DataParallel(self.network) if opt['multi_gpu_on'] else self.network
self.total_param = sum([p.nelement() for p in self.network.parameters() if p.requires_grad])
if opt['cuda']:
self.network.cuda()
optimizer_parameters = self._get_param_groups()
#print(optimizer_parameters)
self._setup_optim(optimizer_parameters, state_dict, num_train_step)
self.para_swapped = False
self.optimizer.zero_grad()
self._setup_lossmap(self.config)
self._setup_kd_lossmap(self.config)
self._setup_adv_lossmap(self.config)
self._setup_adv_training(self.config)
def _setup_adv_training(self, config):
self.adv_teacher = None
if config.get('adv_train', False):
self.adv_teacher = SmartPerturbation(config['adv_epsilon'],
config['multi_gpu_on'],
config['adv_step_size'],
config['adv_noise_var'],
config['adv_p_norm'],
config['adv_k'],
config['fp16'],
config['encoder_type'],
loss_map=self.adv_task_loss_criterion)
def _get_param_groups(self):
no_decay = ['bias', 'gamma', 'beta', 'LayerNorm.bias', 'LayerNorm.weight']
optimizer_parameters = [
{'params': [p for n, p in self.network.named_parameters() if not any(nd in n for nd in no_decay)],
'weight_decay': 0.01},
{'params': [p for n, p in self.network.named_parameters() if any(nd in n for nd in no_decay)],
'weight_decay': 0.0}
]
return optimizer_parameters
def _setup_optim(self, optimizer_parameters, state_dict=None, num_train_step=-1): ###여기서 Error
#print(len(optimizer_parameters[0]['params']))
if self.config['optimizer'] == 'sgd':
self.optimizer = optim.SGD(optimizer_parameters, self.config['learning_rate'],
weight_decay=self.config['weight_decay'])
elif self.config['optimizer'] == 'adamax':
self.optimizer = Adamax(optimizer_parameters,
self.config['learning_rate'],
warmup=self.config['warmup'],
t_total=num_train_step,
max_grad_norm=self.config['grad_clipping'],
schedule=self.config['warmup_schedule'],
weight_decay=self.config['weight_decay'])
if self.config.get('have_lr_scheduler', False): self.config['have_lr_scheduler'] = False
elif self.config['optimizer'] == 'radam':
self.optimizer = RAdam(optimizer_parameters,
self.config['learning_rate'],
warmup=self.config['warmup'],
t_total=num_train_step,
max_grad_norm=self.config['grad_clipping'],
schedule=self.config['warmup_schedule'],
eps=self.config['adam_eps'],
weight_decay=self.config['weight_decay'])
if self.config.get('have_lr_scheduler', False): self.config['have_lr_scheduler'] = False
# The current radam does not support FP16.
self.config['fp16'] = False
elif self.config['optimizer'] == 'adam':
self.optimizer = Adam(optimizer_parameters,
lr=self.config['learning_rate'],
warmup=self.config['warmup'],
t_total=num_train_step,
max_grad_norm=self.config['grad_clipping'],
schedule=self.config['warmup_schedule'],
weight_decay=self.config['weight_decay'])
if self.config.get('have_lr_scheduler', False): self.config['have_lr_scheduler'] = False
else:
raise RuntimeError('Unsupported optimizer: %s' % opt['optimizer'])
print("="*50)
#print(state_dict['optimizer'])
if state_dict and 'optimizer' in state_dict:
#print("Optimizer's state_dict:")
#state_dict['optimizer']['param_groups'][0]['params']=state_dict['optimizer']['param_groups'][0]['params'][:77]
#print(len(state_dict['optimizer']['param_groups'][0]['params']))
#for var_name in state_dict['optimizer']:
# print(var_name, "\t", state_dict['optimizer'][var_name])
#print(self.optimizer.state_dict()) ######
#state_dict['optimizer'][var_name] =
self.optimizer.load_state_dict(state_dict['optimizer']) ###여기서 Error
if self.config['fp16']:
try:
from apex import amp
global amp
except ImportError:
raise ImportError("Please install apex from https://www.github.com/nvidia/apex to use fp16 training.")
model, optimizer = amp.initialize(self.network, self.optimizer, opt_level=self.config['fp16_opt_level'])
self.network = model
self.optimizer = optimizer
if self.config.get('have_lr_scheduler', False):
if self.config.get('scheduler_type', 'rop') == 'rop':
self.scheduler = ReduceLROnPlateau(self.optimizer, mode='max', factor=self.config['lr_gamma'], patience=3)
elif self.config.get('scheduler_type', 'rop') == 'exp':
self.scheduler = ExponentialLR(self.optimizer, gamma=self.config.get('lr_gamma', 0.95))
else:
milestones = [int(step) for step in self.config.get('multi_step_lr', '10,20,30').split(',')]
self.scheduler = MultiStepLR(self.optimizer, milestones=milestones, gamma=self.config.get('lr_gamma'))
else:
self.scheduler = None
def _setup_lossmap(self, config):
task_def_list: List[TaskDef] = config['task_def_list']
self.task_loss_criterion = []
for idx, task_def in enumerate(task_def_list):
cs = task_def.loss
lc = LOSS_REGISTRY[cs](name='Loss func of task {}: {}'.format(idx, cs))
self.task_loss_criterion.append(lc)
def _setup_kd_lossmap(self, config):
task_def_list: List[TaskDef] = config['task_def_list']
self.kd_task_loss_criterion = []
if config.get('mkd_opt', 0) > 0:
for idx, task_def in enumerate(task_def_list):
cs = task_def.kd_loss
assert cs is not None
lc = LOSS_REGISTRY[cs](name='KD Loss func of task {}: {}'.format(idx, cs))
self.kd_task_loss_criterion.append(lc)
def _setup_adv_lossmap(self, config):
task_def_list: List[TaskDef] = config['task_def_list']
self.adv_task_loss_criterion = []
if config.get('adv_train', False):
for idx, task_def in enumerate(task_def_list):
cs = task_def.adv_loss
assert cs is not None
lc = LOSS_REGISTRY[cs](name='Adv Loss func of task {}: {}'.format(idx, cs))
self.adv_task_loss_criterion.append(lc)
def train(self):
if self.para_swapped:
self.para_swapped = False
def _to_cuda(self, tensor):
if tensor is None: return tensor
if isinstance(tensor, list) or isinstance(tensor, tuple):
y = [e.cuda(non_blocking=True) for e in tensor]
for e in y:
e.requires_grad = False
else:
y = tensor.cuda(non_blocking=True)
y.requires_grad = False
return y
def update(self, batch_meta, batch_data, weight_alpha): ####
self.network.train()
y = batch_data[batch_meta['label']]
y = self._to_cuda(y) if self.config['cuda'] else y
task_id = batch_meta['task_id']
inputs = batch_data[:batch_meta['input_len']]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
weight = None
if self.config['itw_on']: ####
if self.config['cuda']:
weight = torch.FloatTensor([batch_meta['weight']]).cuda(non_blocking=True)*weight_alpha
else:
weight = batch_meta['weight']*weight_alpha
"""
if self.config.get('weighted_on', False):
if self.config['cuda']:
weight = batch_data[batch_meta['factor']].cuda(non_blocking=True)
else:
weight = batch_data[batch_meta['factor']]
"""
# fw to get logits
logits = self.mnetwork(*inputs)
# compute loss
loss = 0
if self.task_loss_criterion[task_id] and (y is not None):
loss_criterion = self.task_loss_criterion[task_id]
if isinstance(loss_criterion, RankCeCriterion) and batch_meta['pairwise_size'] > 1:
# reshape the logits for ranking.
loss = self.task_loss_criterion[task_id](logits, y, weight, ignore_index=-1, pairwise_size=batch_meta['pairwise_size'])
else:
loss = self.task_loss_criterion[task_id](logits, y, weight, ignore_index=-1)
# compute kd loss
if self.config.get('mkd_opt', 0) > 0 and ('soft_label' in batch_meta):
soft_labels = batch_meta['soft_label']
soft_labels = self._to_cuda(soft_labels) if self.config['cuda'] else soft_labels
kd_lc = self.kd_task_loss_criterion[task_id]
kd_loss = kd_lc(logits, soft_labels, weight, ignore_index=-1) if kd_lc else 0
loss = loss + kd_loss
# adv training
if self.config.get('adv_train', False) and self.adv_teacher:
# task info
task_type = batch_meta['task_def']['task_type']
adv_inputs = [self.mnetwork, logits] + inputs + [task_type, batch_meta.get('pairwise_size', 1)]
adv_loss = self.adv_teacher.forward(*adv_inputs)
loss = loss + self.config['adv_alpha'] * adv_loss
self.train_loss.update(loss.item(), batch_data[batch_meta['token_id']].size(0))
# scale loss
loss = loss / self.config.get('grad_accumulation_step', 1)
if self.config['fp16']:
with amp.scale_loss(loss, self.optimizer) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
self.local_updates += 1
if self.local_updates % self.config.get('grad_accumulation_step', 1) == 0:
if self.config['global_grad_clipping'] > 0:
if self.config['fp16']:
torch.nn.utils.clip_grad_norm_(amp.master_params(self.optimizer),
self.config['global_grad_clipping'])
else:
torch.nn.utils.clip_grad_norm_(self.network.parameters(),
self.config['global_grad_clipping'])
self.updates += 1
# reset number of the grad accumulation
self.optimizer.step()
self.optimizer.zero_grad()
def encode(self, batch_meta, batch_data):
self.network.eval()
inputs = batch_data[:3]
sequence_output = self.network.encode(*inputs)[0]
return sequence_output
# TODO: similar as function extract, preserve since it is used by extractor.py
# will remove after migrating to transformers package
def extract(self, batch_meta, batch_data):
self.network.eval()
# 'token_id': 0; 'segment_id': 1; 'mask': 2
inputs = batch_data[:3]
all_encoder_layers, pooled_output = self.mnetwork.bert(*inputs)
return all_encoder_layers, pooled_output
def predict(self, batch_meta, batch_data):
self.network.eval()
task_id = batch_meta['task_id']
task_def = TaskDef.from_dict(batch_meta['task_def'])
task_type = task_def.task_type
task_obj = tasks.get_task_obj(task_def)
inputs = batch_data[:batch_meta['input_len']]
if len(inputs) == 3:
inputs.append(None)
inputs.append(None)
inputs.append(task_id)
score = self.mnetwork(*inputs)
if task_obj is not None:
score, predict = task_obj.test_predict(score)
elif task_type == TaskType.Ranking:
score = score.contiguous().view(-1, batch_meta['pairwise_size'])
assert task_type == TaskType.Ranking
score = F.softmax(score, dim=1)
score = score.data.cpu()
score = score.numpy()
predict = np.zeros(score.shape, dtype=int)
positive = np.argmax(score, axis=1)
for idx, pos in enumerate(positive):
predict[idx, pos] = 1
predict = predict.reshape(-1).tolist()
score = score.reshape(-1).tolist()
return score, predict, batch_meta['true_label']
elif task_type == TaskType.SeqenceLabeling:
mask = batch_data[batch_meta['mask']]
score = score.contiguous()
score = score.data.cpu()
score = score.numpy()
predict = np.argmax(score, axis=1).reshape(mask.size()).tolist()
valied_lenght = mask.sum(1).tolist()
final_predict = []
for idx, p in enumerate(predict):
final_predict.append(p[: valied_lenght[idx]])
score = score.reshape(-1).tolist()
return score, final_predict, batch_meta['label']
elif task_type == TaskType.Span:
start, end = score
predictions = []
if self.config['encoder_type'] == EncoderModelType.BERT:
import experiments.squad.squad_utils as mrc_utils
scores, predictions = mrc_utils.extract_answer(batch_meta, batch_data, start, end, self.config.get('max_answer_len', 5), do_lower_case=self.config.get('do_lower_case', False))
return scores, predictions, batch_meta['answer']
else:
raise ValueError("Unknown task_type: %s" % task_type)
return score, predict, batch_meta['label']
def save(self, filename):
network_state = dict([(k, v.cpu()) for k, v in self.network.state_dict().items()])
params = {
'state': network_state,
'optimizer': self.optimizer.state_dict(),
'config': self.config,
}
torch.save(params, filename)
logger.info('model saved to {}'.format(filename))
def load(self, checkpoint):
model_state_dict = torch.load(checkpoint)
if 'state' in model_state_dict:
self.network.load_state_dict(model_state_dict['state'], strict=False)
if 'optimizer' in model_state_dict:
self.optimizer.load_state_dict(model_state_dict['optimizer'])
if 'config' in model_state_dict:
self.config.update(model_state_dict['config'])
def cuda(self):
self.network.cuda()
def model_go():
seed = 12
torch.manual_seed(seed)
# bert_model_name = 'bert-large-uncased'
bert_model_name = 'bert-base-uncased'
lazy = True
# lazy = True
forward_size = 128
# batch_size = 64
batch_size = 128
gradient_accumulate_step = int(batch_size / forward_size)
warmup_proportion = 0.1
learning_rate = 5e-5
num_train_epochs = 3
eval_frequency = 5000
do_lower_case = True
ignore_non_verifiable = True
doc_filter_value = 0.005
doc_top_k = 5
experiment_name = f'fever_v0_slevel_retri_(ignore_non_verifiable:{ignore_non_verifiable})'
debug_mode = False
max_l = 128
# est_datasize = 900_000
num_class = 1
# num_train_optimization_steps
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
device_num = 0 if torch.cuda.is_available() else -1
n_gpu = torch.cuda.device_count()
unk_token_num = {'tokens': 1} # work around for initiating vocabulary.
vocab = ExVocabulary(unk_token_num=unk_token_num)
vocab.add_token_to_namespace("false", namespace="labels") # 0
vocab.add_token_to_namespace("true", namespace="labels") # 1
vocab.add_token_to_namespace("hidden", namespace="labels")
vocab.change_token_with_index_to_namespace("hidden",
-2,
namespace='labels')
# Load Dataset
train_upstream_doc_results = common.load_jsonl(
config.PRO_ROOT /
"data/p_fever/fever_paragraph_level/04-22-15:05:45_fever_v0_plevel_retri_(ignore_non_verifiable:True)/"
"i(5000)|e(0)|v02_ofever(0.8947894789478947)|v05_ofever(0.8555355535553555)|seed(12)/fever_p_level_train_results.jsonl"
)
dev_upstream_doc_results = common.load_jsonl(
config.PRO_ROOT /
"data/p_fever/fever_paragraph_level/04-22-15:05:45_fever_v0_plevel_retri_(ignore_non_verifiable:True)/"
"i(5000)|e(0)|v02_ofever(0.8947894789478947)|v05_ofever(0.8555355535553555)|seed(12)/fever_p_level_dev_results.jsonl"
)
# train_list = common.load_json(config.TRAIN_FILE)
dev_list = common.load_jsonl(config.FEVER_DEV)
train_fitems = fever_s_level_sampler.get_sentence_forward_pair(
'train',
train_upstream_doc_results,
is_training=True,
debug=debug_mode,
ignore_non_verifiable=ignore_non_verifiable,
top_k=doc_top_k,
filter_value=doc_filter_value)
dev_fitems = fever_s_level_sampler.get_sentence_forward_pair(
'dev',
dev_upstream_doc_results,
is_training=False,
debug=debug_mode,
ignore_non_verifiable=ignore_non_verifiable,
top_k=doc_top_k,
filter_value=doc_filter_value)
# Just to show the information
fever_p_level_sampler.down_sample_neg(train_fitems, None)
fever_p_level_sampler.down_sample_neg(dev_fitems, None)
if debug_mode:
dev_list = dev_list[:100]
eval_frequency = 2
# print(dev_list[-1]['_id'])
# exit(0)
# sampled_train_list = down_sample_neg(train_fitems_list, ratio=pos_ratio)
est_datasize = len(train_fitems)
dev_o_dict = list_dict_data_tool.list_to_dict(dev_list, 'id')
# print(dev_o_dict)
bert_tokenizer = BertTokenizer.from_pretrained(bert_model_name,
do_lower_case=do_lower_case)
bert_cs_reader = BertContentSelectionReader(
bert_tokenizer,
lazy,
is_paired=True,
example_filter=lambda x: len(x['context']) == 0,
max_l=max_l,
element_fieldname='element')
bert_encoder = BertModel.from_pretrained(bert_model_name)
model = BertMultiLayerSeqClassification(bert_encoder,
num_labels=num_class,
num_of_pooling_layer=1,
act_type='tanh',
use_pretrained_pooler=True,
use_sigmoid=True)
model.to(device)
if n_gpu > 1:
model = torch.nn.DataParallel(model)
#
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
}]
num_train_optimization_steps = int(est_datasize / forward_size / gradient_accumulate_step) * \
num_train_epochs
if debug_mode:
num_train_optimization_steps = 100
print("Estimated training size", est_datasize)
print("Number of optimization steps:", num_train_optimization_steps)
optimizer = BertAdam(optimizer_grouped_parameters,
lr=learning_rate,
warmup=warmup_proportion,
t_total=num_train_optimization_steps)
dev_instances = bert_cs_reader.read(dev_fitems)
biterator = BasicIterator(batch_size=forward_size)
biterator.index_with(vocab)
forbackward_step = 0
update_step = 0
logging_agent = save_tool.ScoreLogger({})
if not debug_mode:
# # # Create Log File
file_path_prefix, date = save_tool.gen_file_prefix(
f"{experiment_name}")
# Save the source code.
script_name = os.path.basename(__file__)
with open(os.path.join(file_path_prefix, script_name),
'w') as out_f, open(__file__, 'r') as it:
out_f.write(it.read())
out_f.flush()
# # # Log File end
for epoch_i in range(num_train_epochs):
print("Epoch:", epoch_i)
# sampled_train_list = down_sample_neg(train_fitems_list, ratio=pos_ratio)
random.shuffle(train_fitems)
train_instance = bert_cs_reader.read(train_fitems)
train_iter = biterator(train_instance, num_epochs=1, shuffle=True)
for batch in tqdm(train_iter):
model.train()
batch = move_to_device(batch, device_num)
paired_sequence = batch['paired_sequence']
paired_segments_ids = batch['paired_segments_ids']
labels_ids = batch['label']
att_mask, _ = torch_util.get_length_and_mask(paired_sequence)
s1_span = batch['bert_s1_span']
s2_span = batch['bert_s2_span']
loss = model(
paired_sequence,
token_type_ids=paired_segments_ids,
attention_mask=att_mask,
mode=BertMultiLayerSeqClassification.ForwardMode.TRAIN,
labels=labels_ids)
if n_gpu > 1:
loss = loss.mean() # mean() to average on multi-gpu.
if gradient_accumulate_step > 1:
loss = loss / gradient_accumulate_step
loss.backward()
forbackward_step += 1
if forbackward_step % gradient_accumulate_step == 0:
optimizer.step()
optimizer.zero_grad()
update_step += 1
if update_step % eval_frequency == 0:
print("Update steps:", update_step)
dev_iter = biterator(dev_instances,
num_epochs=1,
shuffle=False)
cur_eval_results_list = eval_model(model,
dev_iter,
device_num,
make_int=True,
with_probs=True)
copied_dev_o_dict = copy.deepcopy(dev_o_dict)
copied_dev_d_list = copy.deepcopy(dev_list)
list_dict_data_tool.append_subfield_from_list_to_dict(
cur_eval_results_list,
copied_dev_o_dict,
'qid',
'fid',
check=True)
cur_results_dict_th0_5 = select_top_k_and_to_results_dict(
copied_dev_o_dict,
score_field_name='prob',
top_k=5,
filter_value=0.5,
result_field='predicted_evidence')
list_dict_data_tool.append_item_from_dict_to_list_hotpot_style(
copied_dev_d_list, cur_results_dict_th0_5, 'id',
'predicted_evidence')
# mode = {'standard': False, 'check_doc_id_correct': True}
strict_score, pr, rec, f1 = fever_scorer.fever_sent_only(
copied_dev_d_list, dev_list, max_evidence=5)
score_05 = {
'ss': strict_score,
'pr': pr,
'rec': rec,
'f1': f1,
}
list_dict_data_tool.append_subfield_from_list_to_dict(
cur_eval_results_list,
copied_dev_o_dict,
'qid',
'fid',
check=True)
cur_results_dict_th0_2 = select_top_k_and_to_results_dict(
copied_dev_o_dict,
score_field_name='prob',
top_k=5,
filter_value=0.2,
result_field='predicted_evidence')
list_dict_data_tool.append_item_from_dict_to_list_hotpot_style(
copied_dev_d_list, cur_results_dict_th0_2, 'id',
'predicted_evidence')
# mode = {'standard': False, 'check_doc_id_correct': True}
strict_score, pr, rec, f1 = fever_scorer.fever_sent_only(
copied_dev_d_list, dev_list, max_evidence=5)
score_02 = {
'ss': strict_score,
'pr': pr,
'rec': rec,
'f1': f1,
}
list_dict_data_tool.append_subfield_from_list_to_dict(
cur_eval_results_list,
copied_dev_o_dict,
'qid',
'fid',
check=True)
cur_results_dict_th0_1 = select_top_k_and_to_results_dict(
copied_dev_o_dict,
score_field_name='prob',
top_k=5,
filter_value=0.1,
result_field='predicted_evidence')
list_dict_data_tool.append_item_from_dict_to_list_hotpot_style(
copied_dev_d_list, cur_results_dict_th0_1, 'id',
'predicted_evidence')
# mode = {'standard': False, 'check_doc_id_correct': True}
strict_score, pr, rec, f1 = fever_scorer.fever_sent_only(
copied_dev_d_list, dev_list, max_evidence=5)
score_01 = {
'ss': strict_score,
'pr': pr,
'rec': rec,
'f1': f1,
}
logging_item = {
'score_01': score_01,
'score_02': score_02,
'score_05': score_05,
}
print(json.dumps(logging_item, indent=2))
s01_ss_score = score_01['ss']
s02_ss_score = score_02['ss']
s05_ss_score = score_05['ss']
if not debug_mode:
save_file_name = f'i({update_step})|e({epoch_i})' \
f'|v01_ofever({s01_ss_score})' \
f'|v02_ofever({s02_ss_score})' \
f'|v05_ofever({s05_ss_score})|seed({seed})'
common.save_jsonl(
cur_eval_results_list,
Path(file_path_prefix) /
f"{save_file_name}_dev_s_level_results.jsonl")
# print(save_file_name)
logging_agent.incorporate_results({}, save_file_name,
logging_item)
logging_agent.logging_to_file(
Path(file_path_prefix) / "log.json")
model_to_save = model.module if hasattr(
model, 'module') else model
output_model_file = Path(
file_path_prefix) / save_file_name
torch.save(model_to_save.state_dict(),
str(output_model_file))
class QATrainer(object):
def __init__(self):
self.tokenizer = BertTokenizer.from_pretrained("bert-base-uncased")
self.model = BertForQuestionAnswering.from_pretrained("bert-base-uncased")
train_dir = os.path.join("./save", "qa")
self.save_dir = os.path.join(train_dir, "train_%d" % int(time.strftime("%m%d%H%M%S")))
if not os.path.exists(self.save_dir):
os.makedirs(self.save_dir)
# read data-set and prepare iterator
self.train_loader = self.get_data_loader("./squad/train-v1.1.json")
self.dev_loader = self.get_data_loader("./squad/new_dev-v1.1.json")
num_train_optimization_steps = len(self.train_loader) * config.num_epochs
# optimizer
param_optimizer = list(self.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}
]
self.qa_opt = BertAdam(optimizer_grouped_parameters,
lr=config.qa_lr,
warmup=config.warmup_proportion,
t_total=num_train_optimization_steps)
# self.qg_lr = config.lr
# assign model to device
self.model = self.model.to(config.device)
def get_data_loader(self, file):
train_examples = read_squad_examples(file, is_training=True, debug=config.debug,
reduce_size=config.reduce_size)
train_features = convert_examples_to_features(train_examples,
tokenizer=self.tokenizer,
max_seq_length=config.max_seq_len,
max_query_length=config.max_query_len,
doc_stride=128,
is_training=True)
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)
train_data = TensorDataset(all_input_ids, all_input_mask, all_segment_ids,
all_start_positions, all_end_positions)
sampler = RandomSampler(train_data)
batch_size = int(config.batch_size / config.gradient_accumulation_steps)
train_loader = DataLoader(train_data, sampler=sampler, batch_size=batch_size)
return train_loader
def save_model(self, loss, epoch):
loss = round(loss, 3)
dir_name = os.path.join(self.save_dir, "bert_{}_{:.3f}".format(epoch, loss))
if not os.path.exists(dir_name):
os.makedirs(dir_name)
# save bert model
model_to_save = self.model.module if hasattr(self.model, "module") else self.model
model_file = os.path.join(dir_name, "pytorch_model.bin")
config_file = os.path.join(dir_name, "bert_config.json")
state_dict = model_to_save.state_dict()
torch.save(state_dict, model_file)
model_to_save.config.to_json_file(config_file)
def train(self):
global_step = 1
batch_num = len(self.train_loader)
best_loss = 1e10
qa_loss_lst = []
self.model.train()
for epoch in range(1, 4):
start = time.time()
for step, batch in enumerate(self.train_loader, start=1):
input_ids, input_mask, segment_ids, start_positions, end_positions = batch
seq_len = torch.sum(torch.sign(input_ids), 1)
max_len = torch.max(seq_len)
input_ids = input_ids[:, :max_len].to(config.device)
input_mask = input_mask[:, : max_len].to(config.device)
segment_ids = segment_ids[:, :max_len].to(config.device)
start_positions = start_positions.to(config.device)
end_positions = end_positions.to(config.device)
loss = self.model(input_ids, segment_ids, input_mask, start_positions, end_positions)
# mean() to average across multiple gpu and back-propagation
loss /= config.gradient_accumulation_steps
loss.backward()
qa_loss_lst.append(loss)
# update params
if step % config.gradient_accumulation_steps == 0:
self.qa_opt.step()
# zero grad
self.qa_opt.zero_grad()
global_step += 1
avg_qa_loss = sum(qa_loss_lst)
# empty list
qa_loss_lst = []
msg = "{}/{} {} - ETA : {} - qa_loss: {:.2f}" \
.format(step, batch_num, progress_bar(step, batch_num),
eta(start, step, batch_num),
avg_qa_loss)
print(msg, end="\r")
val_loss = self.evaluate(msg)
if val_loss <= best_loss:
best_loss = val_loss
self.save_model(val_loss, epoch)
print("Epoch {} took {} - final loss : {:.4f} - val_loss :{:.4f}"
.format(epoch, user_friendly_time(time_since(start)), loss, val_loss))
def evaluate(self, msg):
self.model.eval()
num_val_batches = len(self.dev_loader)
val_losses = []
for i, val_data in enumerate(self.dev_loader, start=1):
with torch.no_grad():
val_data = tuple(t.to(config.device) for t in val_data)
input_ids, input_mask, segment_ids, start_positions, end_positions = val_data
val_batch_loss = self.model(input_ids, segment_ids, input_mask, start_positions, end_positions)
qa_loss = val_batch_loss
val_losses.append(qa_loss.mean().item())
msg2 = "{} => Evaluating :{}/{}".format(msg, i, num_val_batches)
print(msg2, end="\r")
val_loss = np.mean(val_losses)
self.model.train()
return val_loss
def train(self):
device = torch.device("cuda:0")
# pdb.set_trace()
if self.debug_mode: self.epochs = 2
print('加载dataloader')
# train_loader, valid_loader = self.create_dataloader()
train_dataloader, eval_dataloader, train_examples_length, valid_examples_length, eval_features = self.create_dataloader()
print('开始训练')
num_train_optimization_steps = None
if do_train:
num_train_optimization_steps = int(
train_examples_length / self.batch_size / self.gradient_accumulation_steps) * self.epochs
model = BertForSequenceClassification.from_pretrained(self.bert_model_path, cache_dir=None,
num_labels=self.num_labels).cuda()
param_optimizer = list(model.named_parameters())
no_decay = ['bias', 'LayerNorm.bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [
{'params': [p for n, p in param_optimizer if not any(nd in n for nd in no_decay)], 'weight_decay': 0.01},
{'params': [p for n, p in param_optimizer if any(nd in n for nd in no_decay)], 'weight_decay': 0.0}
]
optimizer = BertAdam(optimizer_grouped_parameters,
lr=self.learning_rate,
warmup=self.warmup_proportion,
t_total=num_train_optimization_steps)
global_step = 0
tr_loss = 0
best_F1 = 0
tokenizer = BertTokenizer.from_pretrained(self.bert_model_path, cache_dir=None, do_lower_case=True)
model.train()
for epoch in range(int(self.epochs)):
nb_tr_examples, nb_tr_steps = 0, 0
for step, batch in enumerate(train_dataloader):
print('epoch:', epoch, 'batchIndex:', step)
batch = tuple(t.to(device) for t in batch)
# pdb.set_trace()
input_ids, input_mask, segment_ids, label_ids = batch
logits = model(input_ids.cuda(), segment_ids.cuda(), input_mask.cuda(), labels=None).cuda()
loss_fct = BCEWithLogitsLoss()
label_ids = label_ids.cuda()
loss = loss_fct(logits.view(-1, 1), label_ids.view(-1, 1))
if self.gradient_accumulation_steps > 1:
loss = loss / self.gradient_accumulation_steps
loss.backward()
tr_loss += loss.item()
nb_tr_examples += input_ids.size(0)
nb_tr_steps += 1
if (step + 1) % self.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
model.zero_grad()
global_step += 1
if (step + 1) % self.period == 0:
model_to_save = model.module if hasattr(model, 'module') else model
model.eval()
torch.set_grad_enabled(False)
# 开始验证
idx = 0
TP, TN, FN, FP = 0, 0, 0, 0
output = {}
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)
batch_size = input_ids.size(0)
with torch.no_grad():
logits = model(input_ids, segment_ids, input_mask, labels=None)
logits = torch.sigmoid(logits)
preds = (logits > 0.4).float()
preds_numpy = preds.cpu().long().data.numpy()
for i in range(idx, idx + batch_size):
if eval_features[i].file not in output:
output[eval_features[i].file] = {}
output[eval_features[i].file][eval_features[i].turn] = preds_numpy[i - idx].tolist()
TP, TN, FN, FP = obtain_TP_TN_FN_FP(preds, label_ids, TP, TN, FN, FP)
idx += batch_size
with open("data/BERT_{}_prediction.json".format(self.test_set), 'w') as f:
json.dump(output, f)
precision = TP / (TP + FP + 0.001)
recall = TP / (TP + FN + 0.001)
F1 = 2 * precision * recall / (precision + recall + 0.001)
logger.info(
"epoch is {} step is {} precision is {} recall is {} F1 is {} best_F1 is {}".format(epoch, step,
precision,
recall, F1,
best_F1))
# F1 = evaluate(args, model, device, processor, label_list, num_labels, tokenizer, output_mode)
if F1 > best_F1:
output_dir = os.path.join("checkpoints/predictor/", 'save_step_{}'.format(global_step))
if not os.path.exists(output_dir):
os.makedirs(output_dir)
output_model_file = os.path.join(output_dir, WEIGHTS_NAME)
output_config_file = os.path.join(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(output_dir)
best_F1 = F1
model.train() # turn on train mode
torch.set_grad_enabled(True) # start gradient tracking
tr_loss = 0
def train(self):
if self.debug_mode: self.epochs = 1
# 加载 dataloader
train_loader, valid_loader = self.create_dataloader()
# 训练
self.seed_everything()
lr = 2e-5
accumulation_steps = math.ceil(self.batch_size / self.base_batch_size)
# 预训练 bert 转成 pytorch
if os.path.exists(self.bert_model_path + "pytorch_model.bin") is False:
convert_tf_checkpoint_to_pytorch.convert_tf_checkpoint_to_pytorch(
self.bert_model_path + 'bert_model.ckpt',
self.bert_model_path + 'bert_config.json',
self.bert_model_path + 'pytorch_model.bin')
# 加载预训练模型
model = BertNeuralNet.from_pretrained(self.bert_model_path, cache_dir=None)
model.zero_grad()
model = model.to(self.device)
# 不同的参数组设置不同的 weight_decay
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}
]
epoch_steps = int(self.train_len / self.base_batch_size / accumulation_steps)
num_train_optimization_steps = int(self.epochs * epoch_steps)
valid_every = math.floor(epoch_steps / 10)
optimizer = BertAdam(optimizer_grouped_parameters, lr=lr, warmup=0.05, t_total=num_train_optimization_steps)
# 渐变学习速率
#scheduler = torch.optim.lr_scheduler.LambdaLR(optimizer, lambda epoch: 0.6 ** epoch)
model, optimizer = amp.initialize(model, optimizer, opt_level="O1", verbosity=0)
# 开始训练
for epoch in range(self.epochs):
train_start_time = time.time()
model.train()
optimizer.zero_grad()
# 加载每个 batch 并训练
for i, batch_data in enumerate(train_loader):
x_batch = batch_data[0]
y_batch = batch_data[1]
target_weight_batch = batch_data[2]
aux_weight_batch = batch_data[3]
identity_weight_batch = batch_data[4]
x_mask = batch_data[5]
y_pred = model(x_batch, attention_mask=x_mask, labels=None)
target_loss, aux_loss, identity_loss = self.custom_loss(y_pred, y_batch, epoch, target_weight_batch, aux_weight_batch, identity_weight_batch)
loss = target_loss + aux_loss + identity_loss
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
if (i + 1) % accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
# 验证
if (i + 1) % valid_every == 0:
valid_start_time = time.time()
model.eval()
y_pred = np.zeros((len(self.train_df) - self.train_len))
for j, valid_batch_data in enumerate(valid_loader):
x_batch = valid_batch_data[0]
x_mask = valid_batch_data[2]
batch_y_pred = self.sigmoid(model(x_batch, attention_mask=x_mask, labels=None).detach().cpu().numpy())[:, 0]
y_pred[j * self.base_batch_size: (j + 1) * self.base_batch_size] = batch_y_pred
# 计算得分
auc_score = self.evaluator.get_final_metric(y_pred)
print("epoch: %d duration: %d min auc_score: %.4f" % (epoch, int((time.time() - train_start_time) / 60), auc_score))
if not self.debug_mode:
state_dict = model.state_dict()
stage = int((i + 1) / valid_every)
train_duration = int((time.time() - train_start_time) / 60)
valid_duration = int((time.time() - valid_start_time) / 60)
if epoch == 0 and stage == 1:
# model[bert][seed][epoch][stage][model_name][stage_train_duration][valid_duration][score].bin
model_name = "model/model_%d_%d_%d_%s_%dmin_%dmin_%.4f.bin" % (self.seed, epoch + 1, stage, self.model_name, train_duration, valid_duration, auc_score)
else:
# model[bert][seed][epoch][stage][model_name][score].bin
model_name = "model/model_%d_%d_%d_%s_%.4f.bin" % (self.seed, epoch + 1, stage, self.model_name, auc_score)
torch.save(state_dict, os.path.join(self.data_dir, model_name))
model.train()
# del 训练相关输入和模型
training_history = [train_loader, valid_loader, model, optimizer, param_optimizer, optimizer_grouped_parameters]
for variable in training_history:
del variable
gc.collect()
opt = model.forward_logits(sentences_s, mask_s, sentences_t,
mask_t, event1, event1_mask, event2,
event2_mask)
opt_mask = model_mask.forward_logits(sentences_s_mask, mask_s,
sentences_t, mask_t, event1,
event1_mask, event2,
event2_mask)
opt_mix = torch.cat([opt, opt_mask], dim=-1)
logits = model.additional_fc(opt_mix)
loss = loss_fn(logits, data_y)
torch.nn.utils.clip_grad_norm_(model.parameters(), 1)
torch.nn.utils.clip_grad_norm_(model_mask.parameters(), 1)
optimizer.zero_grad()
optimizer_mask.zero_grad()
loss.backward()
optimizer.step()
optimizer_mask.step()
model.eval()
model_mask.eval()
with torch.no_grad():
predicted_all = []
gold_all = []
for batch, batch_mask in test_dataset_mix:
sentences_s, mask_s, sentences_t, mask_t, event1, event1_mask, event2, event2_mask, data_y, _ = batch
sentences_s_mask = batch_mask[0]
opt = model.forward_logits(sentences_s, mask_s, sentences_t,
targets[:, :1])
#bce_loss_2 = nn.BCEWithLogitsLoss()(data[:,1:],targets[:,2:])
return (bce_loss_1 * loss_weight)
#return (bce_loss_1 * loss_weight) + bce_loss_2
tq = tqdm(range(EPOCHS))
for epoch in tq:
train_loader = torch.utils.data.DataLoader(train,
batch_size=batch_size,
shuffle=True)
avg_loss = 0.
avg_accuracy = 0.
lossf = None
tk0 = tqdm(enumerate(train_loader), total=len(train_loader), leave=False)
optimizer.zero_grad() # Bug fix - thanks to @chinhuic
for i, (x_batch, y_batch) in tk0:
# optimizer.zero_grad()
y_pred = model(x_batch.to(device),
attention_mask=(x_batch > 0).to(device),
labels=None)
#loss = F.binary_cross_entropy_with_logits(y_pred,y_batch.to(device))
loss = custom_loss(y_pred, y_batch.to(device))
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
if (i + 1
) % accumulation_steps == 0: # Wait for several backward steps
optimizer.step() # Now we can do an optimizer step
optimizer.zero_grad()
def train(self):
model = self.agent
config = self.config
work_dir = Path(config['work_dir'])
train_iter = 0
save_every_niter = config['save_every_niter']
entropy_reg_weight = config['entropy_reg_weight']
summary_writer = SummaryWriter(
os.path.join(config['work_dir'], 'tb_log/train'))
max_train_step = config['max_train_step']
save_program_cache_niter = config.get('save_program_cache_niter', 0)
freeze_bert_for_niter = config.get('freeze_bert_niter', 0)
gradient_accumulation_niter = config.get('gradient_accumulation_niter',
1)
use_trainable_sketch_predictor = self.config.get(
'use_trainable_sketch_predictor', False)
bert_params = [(p_name, p) for (p_name, p) in model.named_parameters()
if 'bert_model' in p_name and p.requires_grad]
no_decay = ['bias', 'LayerNorm.bias', 'LayerNorm.weight']
bert_grouped_parameters = [{
'params':
[p for n, p in bert_params if not any(nd in n for nd in no_decay)],
'weight_decay':
0.01
}, {
'params':
[p for n, p in bert_params if any(nd in n for nd in no_decay)],
'weight_decay':
0.0
}]
bert_optimizer = BertAdam(bert_grouped_parameters,
lr=self.config['bert_learning_rate'],
warmup=0.1,
t_total=max_train_step)
# non bert parameters
other_params = [
p for n, p in model.named_parameters()
if 'bert_model' not in n and p.requires_grad
]
other_optimizer = torch.optim.Adam(other_params, lr=0.001)
# eval batch loader
self.load_dev_environments()
dev_iter = nn_util.loop_iter(self.dev_environments,
batch_size=self.config['batch_size'],
shuffle=True)
cum_loss = cum_examples = 0.
t1 = time.time()
while train_iter < max_train_step:
if 'cuda' in self.devices[0].type:
torch.cuda.set_device(self.devices[0])
train_iter += 1
other_optimizer.zero_grad()
bert_optimizer.zero_grad()
train_samples, samples_info = self.train_queue.get()
sample_categories = samples_info['category']
dev_batched_envs = next(dev_iter) # get a batch of dev examples
# model inference on dev examples
dev_samples = model.decode_examples(
dev_batched_envs, beam_size=self.config['beam_size'])
dev_samples = dev_samples[0] # list of list to list
try:
queue_size = self.train_queue.qsize()
# queue_sizes = []
# for cat in self.categories:
# queue_sizes.append(self.queues[cat].qsize())
print(
f'[Learner] train_iter={train_iter} train queue size={queue_size}',
file=sys.stderr)
summary_writer.add_scalar('train_queue_sizes', queue_size,
train_iter)
except NotImplementedError:
pass
train_trajectories = [
sample.trajectory for sample in train_samples
]
# dev
dev_trajectories = [sample.trajectory for sample in dev_samples]
# repeat for getting dev grad
dev_loss, dev_log_prob = self.forward_single(dev_samples,
train_iter,
summary_writer,
batch_type='dev')
# other_optimizer.step() # should we not do this
grad_dev_nested = [p.grad for p in other_params]
grad_dev = [torch.flatten(g) for g in grad_dev_nested]
grad_dev = torch.cat(grad_dev)
# print('dev gradient: ', len(grad_dev), grad_dev[0])
# print('log pr dev: ', dev_log_prob)
other_optimizer.zero_grad()
bert_optimizer.zero_grad()
# to save memory, for vertical tableBERT, we partition the training trajectories into small chunks
# if isinstance(self.agent.encoder.bert_model, VerticalAttentionTableBert) and 'large' in self.agent.encoder.bert_model.config.base_model_name:
# chunk_size = 5
# # dev_chunk_size = 5
# else:
# chunk_size = len(train_samples)
# dev_chunk_size = len(dev_samples)
chunk_size = 1000000000
chunk_num = int(math.ceil(len(train_samples) / chunk_size))
cum_loss = 0.
log_pr_catwise_train = torch.zeros((len(self.categories), 1))
if chunk_num > 1:
for chunk_id in range(0, chunk_num):
train_samples_chunk = train_samples[chunk_size *
chunk_id:chunk_size *
chunk_id + chunk_size]
sample_categories_chunk = sample_categories[
chunk_size * chunk_id:chunk_size * chunk_id +
chunk_size]
for idx, cat in enumerate(self.categories):
cat_indices = [
j for j in range(len(train_samples_chunk))
if sample_categories_chunk[j] == cat
]
train_cat_chunk = [
train_samples_chunk[j] for j in cat_indices
]
loss_val, log_pr_chunk = self.forward_single(
train_cat_chunk,
train_iter,
summary_writer,
batch_type='train')
cum_loss += loss_val
grad_cat = [p.grad for p in other_params]
reward = torch.dot(torch.tensor(grad_dev),
torch.tensor(grad_cat))
self.current_psi[idx] = self.current_psi[
idx] + self.config['dds_lr'] * reward * log_pr_chunk
grad_multiply_factor = 1 / len(train_samples)
for p in self.agent.parameters():
if p.grad is not None:
p.grad.data.mul_(grad_multiply_factor)
else:
for idx, cat in enumerate(self.categories):
cat_indices = [
j for j in range(len(train_samples))
if sample_categories[j] == cat
]
train_cat = [train_samples[j] for j in cat_indices]
if not train_cat: # empty list, no samples from this category
print('no samples in current batch for: ', cat)
sys.stdout.flush()
continue
loss_val, log_pr = self.forward_single(train_cat,
train_iter,
summary_writer,
batch_type='train')
cum_loss = loss_val * len(train_samples)
grad_cat = [p.grad
for p in other_params] # ignore bert_params
grad_cat = [torch.flatten(g) for g in grad_cat]
grad_cat = torch.cat(grad_cat)
other_optimizer.step()
other_optimizer.zero_grad()
# for every cat, fresh gradients
# print(type(grad_cat), grad_cat, grad_cat.shape)
# print(type(grad_dev), grad_dev, grad_dev.shape)
sys.stdout.flush()
# t1 = torch.FloatTensor(grad_dev)
# t2 = torch.FloatTensor(grad_cat)
# print(t1.shape)
# sys.stdout.flush()
# print(t2.shape)
# sys.stdout.flush()
reward = torch.dot(grad_dev, grad_cat) / (
torch.norm(grad_cat) * torch.norm(grad_dev))
print('reward: ', reward)
sys.stderr.flush()
sys.stdout.flush()
self.current_psi[idx] = self.current_psi[
idx] + self.config['dds_lr'] * reward * log_pr
# clip gradient
grad_norm = torch.nn.utils.clip_grad_norm_(other_params, 5.)
# cumulative gradient backprop
if train_iter % gradient_accumulation_niter == 0:
# other_optimizer.step()
if train_iter > freeze_bert_for_niter:
bert_optimizer.step()
elif train_iter == freeze_bert_for_niter:
print(
f'[Learner] train_iter={train_iter} reset Adam optimizer and start fine-tuning BERT'
)
other_optimizer = torch.optim.Adam(other_params, lr=0.001)
self.psi_queue.put(self.current_psi)
if 'clip_frac' in samples_info:
summary_writer.add_scalar('sample_clip_frac',
samples_info['clip_frac'],
train_iter)
# update sketch predictor
if use_trainable_sketch_predictor:
if 'cuda' in self.devices[1].type:
torch.cuda.set_device(self.devices[1])
self.sketch_predictor_trainer.step(train_trajectories,
train_iter=train_iter)
cum_examples += len(train_samples)
self.try_update_model_to_actors(train_iter)
if train_iter % save_every_niter == 0:
print(
f'[Learner] train_iter={train_iter} avg. loss={cum_loss / cum_examples}, '
f'{cum_examples} examples ({cum_examples / (time.time() - t1)} examples/s)',
file=sys.stderr)
cum_loss = cum_examples = 0.
t1 = time.time()
# log stats of the program cache
program_cache_stat = self.shared_program_cache.stat()
summary_writer.add_scalar(
'avg_num_programs_in_cache',
program_cache_stat['num_entries'] /
program_cache_stat['num_envs'], train_iter)
summary_writer.add_scalar('num_programs_in_cache',
program_cache_stat['num_entries'],
train_iter)
if save_program_cache_niter > 0 and train_iter % save_program_cache_niter == 0:
program_cache_file = work_dir / 'log' / f'program_cache.iter{train_iter}.json'
program_cache = self.shared_program_cache.all_programs()
json.dump(program_cache,
program_cache_file.open('w'),
indent=2)
