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train.py
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train.py
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import argparse
import os
import json
from torch.utils.tensorboard import SummaryWriter
import random
import numpy as np
import zipfile
import torch
from transformers import AdamW, get_linear_schedule_with_warmup
from tatk.nlu.jointBERT.dataloader import Dataloader
from tatk.nlu.jointBERT.jointBERT import JointBERT
def set_seed(seed):
random.seed(seed)
np.random.seed(seed)
torch.manual_seed(seed)
parser = argparse.ArgumentParser(description="Train a model.")
parser.add_argument('--config_path',
help='path to config file')
if __name__ == '__main__':
args = parser.parse_args()
config = json.load(open(args.config_path))
data_dir = config['data_dir']
output_dir = config['output_dir']
log_dir = config['log_dir']
DEVICE = config['DEVICE']
set_seed(config['seed'])
if 'multiwoz' in data_dir:
print('-'*20 + 'dataset:multiwoz' + '-'*20)
from tatk.nlu.jointBERT.multiwoz.postprocess import is_slot_da, calculateF1, recover_intent
elif 'camrest' in data_dir:
print('-' * 20 + 'dataset:camrest' + '-' * 20)
from tatk.nlu.jointBERT.camrest.postprocess import is_slot_da, calculateF1, recover_intent
elif 'crosswoz' in data_dir:
print('-' * 20 + 'dataset:crosswoz' + '-' * 20)
from tatk.nlu.jointBERT.crosswoz.postprocess import is_slot_da, calculateF1, recover_intent
intent_vocab = json.load(open(os.path.join(data_dir, 'intent_vocab.json')))
tag_vocab = json.load(open(os.path.join(data_dir, 'tag_vocab.json')))
dataloader = Dataloader(intent_vocab=intent_vocab, tag_vocab=tag_vocab,
pretrained_weights=config['model']['pretrained_weights'])
print('intent num:', len(intent_vocab))
print('tag num:', len(tag_vocab))
for data_key in ['train', 'val', 'test']:
dataloader.load_data(json.load(open(os.path.join(data_dir, '{}_data.json'.format(data_key)))), data_key,
cut_sen_len=config['cut_sen_len'], use_bert_tokenizer=config['use_bert_tokenizer'])
print('{} set size: {}'.format(data_key, len(dataloader.data[data_key])))
if not os.path.exists(output_dir):
os.makedirs(output_dir)
if not os.path.exists(log_dir):
os.makedirs(log_dir)
writer = SummaryWriter(log_dir)
model = JointBERT(config['model'], DEVICE, dataloader.tag_dim, dataloader.intent_dim, dataloader.intent_weight)
model.to(DEVICE)
if config['model']['finetune']:
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [
{'params': [p for n, p in model.named_parameters() if
not any(nd in n for nd in no_decay) and p.requires_grad],
'weight_decay': config['model']['weight_decay']},
{'params': [p for n, p in model.named_parameters() if any(nd in n for nd in no_decay) and p.requires_grad],
'weight_decay': 0.0}
]
optimizer = AdamW(optimizer_grouped_parameters, lr=config['model']['learning_rate'],
eps=config['model']['adam_epsilon'])
scheduler = get_linear_schedule_with_warmup(optimizer, num_warmup_steps=config['model']['warmup_steps'],
num_training_steps=config['model']['max_step'])
else:
for n, p in model.named_parameters():
if 'bert' in n:
p.requires_grad = False
optimizer = torch.optim.Adam(filter(lambda p: p.requires_grad, model.parameters()),
lr=config['model']['learning_rate'])
for name, param in model.named_parameters():
print(name, param.shape, param.device, param.requires_grad)
max_step = config['model']['max_step']
check_step = config['model']['check_step']
batch_size = config['model']['batch_size']
model.zero_grad()
train_slot_loss, train_intent_loss = 0, 0
best_val_f1 = 0.
writer.add_text('config', json.dumps(config))
for step in range(1, max_step + 1):
model.train()
batched_data = dataloader.get_train_batch(batch_size)
batched_data = tuple(t.to(DEVICE) for t in batched_data)
word_seq_tensor, tag_seq_tensor, intent_tensor, word_mask_tensor, tag_mask_tensor, context_seq_tensor, context_mask_tensor = batched_data
if not config['model']['context']:
context_seq_tensor, context_mask_tensor = None, None
_, _, slot_loss, intent_loss = model.forward(word_seq_tensor, word_mask_tensor, tag_seq_tensor, tag_mask_tensor,
intent_tensor, context_seq_tensor, context_mask_tensor)
train_slot_loss += slot_loss.item()
train_intent_loss += intent_loss.item()
loss = slot_loss + intent_loss
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), 1.0)
optimizer.step()
if config['model']['finetune']:
scheduler.step() # Update learning rate schedule
model.zero_grad()
if step % check_step == 0:
train_slot_loss = train_slot_loss / check_step
train_intent_loss = train_intent_loss / check_step
print('[%d|%d] step' % (step, max_step))
print('\t slot loss:', train_slot_loss)
print('\t intent loss:', train_intent_loss)
predict_golden = {'intent': [], 'slot': [], 'overall': []}
val_slot_loss, val_intent_loss = 0, 0
model.eval()
for pad_batch, ori_batch, real_batch_size in dataloader.yield_batches(batch_size, data_key='val'):
pad_batch = tuple(t.to(DEVICE) for t in pad_batch)
word_seq_tensor, tag_seq_tensor, intent_tensor, word_mask_tensor, tag_mask_tensor, context_seq_tensor, context_mask_tensor = pad_batch
if not config['model']['context']:
context_seq_tensor, context_mask_tensor = None, None
with torch.no_grad():
slot_logits, intent_logits, slot_loss, intent_loss = model.forward(word_seq_tensor,
word_mask_tensor,
tag_seq_tensor,
tag_mask_tensor,
intent_tensor,
context_seq_tensor,
context_mask_tensor)
val_slot_loss += slot_loss.item() * real_batch_size
val_intent_loss += intent_loss.item() * real_batch_size
for j in range(real_batch_size):
predicts = recover_intent(dataloader, intent_logits[j], slot_logits[j], tag_mask_tensor[j],
ori_batch[j][0], ori_batch[j][-4])
labels = ori_batch[j][3]
predict_golden['overall'].append({
'predict': predicts,
'golden': labels
})
predict_golden['slot'].append({
'predict': [x for x in predicts if is_slot_da(x)],
'golden': [x for x in labels if is_slot_da(x)]
})
predict_golden['intent'].append({
'predict': [x for x in predicts if not is_slot_da(x)],
'golden': [x for x in labels if not is_slot_da(x)]
})
for j in range(10):
writer.add_text('val_sample_{}'.format(j),
json.dumps(predict_golden['overall'][j], indent=2, ensure_ascii=False),
global_step=step)
total = len(dataloader.data['val'])
val_slot_loss /= total
val_intent_loss /= total
print('%d samples val' % total)
print('\t slot loss:', val_slot_loss)
print('\t intent loss:', val_intent_loss)
writer.add_scalar('intent_loss/train', train_intent_loss, global_step=step)
writer.add_scalar('intent_loss/val', val_intent_loss, global_step=step)
writer.add_scalar('slot_loss/train', train_slot_loss, global_step=step)
writer.add_scalar('slot_loss/val', val_slot_loss, global_step=step)
for x in ['intent', 'slot', 'overall']:
precision, recall, F1 = calculateF1(predict_golden[x])
print('-' * 20 + x + '-' * 20)
print('\t Precision: %.2f' % (100 * precision))
print('\t Recall: %.2f' % (100 * recall))
print('\t F1: %.2f' % (100 * F1))
writer.add_scalar('val_{}/precision'.format(x), precision, global_step=step)
writer.add_scalar('val_{}/recall'.format(x), recall, global_step=step)
writer.add_scalar('val_{}/F1'.format(x), F1, global_step=step)
if F1 > best_val_f1:
best_val_f1 = F1
torch.save(model.state_dict(), os.path.join(output_dir, 'pytorch_model.bin'))
print('best val F1 %.4f' % best_val_f1)
print('save on', output_dir)
train_slot_loss, train_intent_loss = 0, 0
writer.add_text('val overall F1', '%.2f' % (100 * best_val_f1))
writer.close()
model_path = os.path.join(output_dir, 'pytorch_model.bin')
zip_path = config['zipped_model_path']
print('zip model to', zip_path)
with zipfile.ZipFile(zip_path, 'w', zipfile.ZIP_DEFLATED) as zf:
zf.write(model_path)