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DPR_train.py
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DPR_train.py
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import datasets
import torch
from tqdm.auto import tqdm
from tqdm import trange
import numpy as np
import os
import argparse
import re
import random
import torch
import torch.nn.functional as F
from torch.utils.data import (
DataLoader,
RandomSampler,
TensorDataset,
dataset
)
from datasets import load_from_disk, load_dataset, concatenate_datasets
from transformers import AutoModel, AutoConfig, AutoTokenizer
from transformers import (
XLMRobertaModel, AdamW, TrainingArguments, BertPreTrainedModel, BertModel,
get_linear_schedule_with_warmup, RobertaModel
)
from transformers.models.roberta.modeling_roberta import RobertaPreTrainedModel
import wandb
from retrieval import SparseRetrieval
from utils_qa import tokenize
from tokenization_kobert import KoBertTokenizer
def main():
parser = argparse.ArgumentParser(description='Set some train option')
parser.add_argument('-lr', default=5e-5, type=float, help='learning rate (default : 5e-5)')
parser.add_argument('-name', type=str, help='wandb_name')
args = parser.parse_args()
# wandb setting
wandb.init(project='DPR_training', name='DPR_KoBert_with_TF_IDF' + args.name)
wandb_config = wandb.config
wandb_config.learning_rate = args.lr
wandb_config.batch_szie = 6
wandb_config.epochs = 20
wandb_config.weigth_decay = 0.01
# load dataset
dataset_KLUE = load_from_disk('/opt/ml/input/data/data/train_dataset')
dataset = load_dataset("squad_kor_v1")
# mapping KLUE dataset to korquad dataset's features
dataset_KLUE_train = dataset_KLUE['train'].map(features=dataset['train'].features,
remove_columns=['document_id', '__index_level_0__'],
keep_in_memory=True)
dataset_KLUE_valid = dataset_KLUE['validation'].map(features=dataset['validation'].features,
remove_columns=['document_id', '__index_level_0__'],
keep_in_memory=True)
# concatenate datasets
dataset['train'] = concatenate_datasets([dataset_KLUE_train, dataset['train'].select(range(3900))])
dataset['validation'] = concatenate_datasets([dataset_KLUE_valid, dataset['validation'].select(range(1000))])
# TF-IDF retrieval
retriever = SparseRetrieval(tokenize_fn=tokenize,
data_path="/opt/ml/input/data/data",
context_path="wikipedia_documents.json")
retriever.get_sparse_embedding()
df = retriever.retrieve(dataset['train'], topk=21)
# model_name and load tokenizer
model_name = 'monologg/kobert'
tokenizer = KoBertTokenizer.from_pretrained(model_name)
# tokenize data
training_dataset = dataset['train'] # for test .select(range(10))
# make difficult negative samples
print('make negative sample')
gold_list = [re.sub(r'( )+' ,' ', cxt) for cxt in training_dataset['context']]
gold_list = [re.sub(r'\\n', '\n', cxt) for cxt in gold_list]
high_TF_IDF_list = [re.sub(r'( )+' ,' ', cxt) for cxt in df['context']]
high_TF_IDF_list = [re.sub(r'\\n', '\n', cxt) for cxt in high_TF_IDF_list]
high_TF_IDF_list = [high_TF_IDF_list[idx*21:idx*21+21] for idx in range(len(gold_list))]
temp_list = []
for gold_cxt, TF_IDF_list in zip(gold_list, high_TF_IDF_list):
tmp_set = set(TF_IDF_list)
tmp_set.discard(gold_cxt)
temp_list.append(list(tmp_set))
high_TF_IDF_list = temp_list
print(f'high_TF_IDF_list_num : {len(high_TF_IDF_list)}')
negative_token_list = [tokenizer(li ,
padding='max_length',
truncation=True,
return_tensors='pt') for li in tqdm(high_TF_IDF_list)]
q_seqs = tokenizer(training_dataset['question'],
padding='max_length',
truncation=True,
return_tensors='pt')
p_seqs = tokenizer(gold_list,
padding='max_length',
truncation=True,
return_tensors='pt')
# make dataset
train_dataset = MyDataset(p_seqs, q_seqs, negative_token_list)
# train_dataset = TensorDataset(p_seqs['input_ids'], p_seqs['attention_mask'],
# q_seqs['input_ids'], q_seqs['attention_mask'])
# make valid dataset
validate_dataset = dataset['validation'] # .select(range(10))
q_seqs = tokenizer(validate_dataset['question'],
padding='max_length',
truncation=True,
return_tensors='pt')
p_seqs = tokenizer(validate_dataset['context'],
padding='max_length',
truncation=True,
return_tensors='pt')
valid_dataset = TensorDataset(p_seqs['input_ids'], p_seqs['token_type_ids'], p_seqs['attention_mask'],
q_seqs['input_ids'], q_seqs['token_type_ids'], q_seqs['attention_mask'])
# valid_dataset = TensorDataset(p_seqs['input_ids'], p_seqs['attention_mask'],
# q_seqs['input_ids'], q_seqs['attention_mask'])
#load config
config = AutoConfig.from_pretrained(model_name)
# load model
p_encoder = BertEncoder.from_pretrained(model_name, config=config)
q_encoder = BertEncoder.from_pretrained(model_name, config=config)
# p_encoder = RobertaEncoder.from_pretrained(model_name, config=config)
# q_encoder = RobertaEncoder.from_pretrained(model_name, config=config)
if torch.cuda.is_available():
p_encoder.cuda()
q_encoder.cuda()
print('GPU enabled')
args = TrainingArguments(
output_dir='/opt/ml/models/DPR_with_difficult',
evaluation_strategy='epoch',
learning_rate=args.lr,
warmup_steps=100,
per_device_train_batch_size=6,
per_device_eval_batch_size=40,
num_train_epochs=20,
weight_decay=0.1
)
# train
q_encoder, p_encoder = train(args, train_dataset, valid_dataset, p_encoder, q_encoder)
if os.path.isdir(args.output_dir) == False:
os.makedirs(args.output_dir, exist_ok=True)
# save model
p_encoder.save_pretrained(os.path.join(args.output_dir, 'p_encoder'),save_config=True)
q_encoder.save_pretrained(os.path.join(args.output_dir, 'q_encoder'), save_config=True)
class MyDataset(torch.utils.data.Dataset):
"""Dataset for p_seqs, q_seqs, negative samples"""
def __init__(self, p_seqs, q_seqs, negative_token_list):
super(MyDataset, self).__init__()
self.p_seqs = p_seqs
self.q_seqs = q_seqs
self.negative_token_list = negative_token_list
def __getitem__(self, index):
return (self.p_seqs['input_ids'][index], self.p_seqs['token_type_ids'][index], self.p_seqs['attention_mask'][index],
self.q_seqs['input_ids'][index], self.q_seqs['token_type_ids'][index], self.q_seqs['attention_mask'][index],
self.negative_token_list[index]['input_ids'][np.random.randint(0, len(self.negative_token_list[index]['input_ids']))],
self.negative_token_list[index]['token_type_ids'][np.random.randint(0, len(self.negative_token_list[index]['token_type_ids']))],
self.negative_token_list[index]['attention_mask'][np.random.randint(0, len(self.negative_token_list[index]['attention_mask']))])
def __len__(self):
return len(self.p_seqs['input_ids'])
class BertEncoder(BertPreTrainedModel):
def __init__(self, config):
super(BertEncoder, self).__init__(config)
self.bert = BertModel(config)
self.init_weights()
def forward(self, input_ids, attention_mask=None, token_type_ids=None):
outputs = self.bert(input_ids, attention_mask, token_type_ids)
pooled_output = outputs[1]
return pooled_output
class RobertaEncoder(RobertaPreTrainedModel):
def __init__(self, config):
super(RobertaEncoder, self).__init__(config)
self.roberta = XLMRobertaModel(config)
self.init_weights()
def forward(self, input_ids, attention_mask=None):
outputs = self.roberta(input_ids, attention_mask)
pooled_output = outputs[1]
return pooled_output
def train(args, train_dataset, valid_dataset, p_model, q_model):
# Dataloader
train_sampler = RandomSampler(train_dataset)
train_dataloader = DataLoader(train_dataset, sampler=train_sampler, batch_size=args.per_device_train_batch_size)
valid_loader = DataLoader(valid_dataset, batch_size=args.per_device_eval_batch_size)
# Optimizer
'''
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [
{'params': [p for n, p in p_model.named_parameters() if not any(nd in n for nd in no_decay)], 'weight_decay' : args.weight_decay},
{'params': [p for n, p in p_model.named_parameters() if any(nd in n for nd in no_decay)], 'weight_decay' : 0.0},
{'params': [p for n, p in q_model.named_parameters() if not any(nd in n for nd in no_decay)], 'weight_decay' : args.weight_decay},
{'params': [p for n, p in q_model.named_parameters() if any(nd in n for nd in no_decay)], 'weight_decay' : 0.0},
]
optimizer = AdamW(optimizer_grouped_parameters, lr=args.learning_rate, eps=args.adam_epsilon)
t_total = len(train_dataloader) // args.gradient_accumulation_steps * args.num_train_epochs
scheduler = get_linear_schedule_with_warmup(optimizer, num_warmup_steps=args.warmup_steps, num_training_steps=t_total)
'''
t_total = len(train_dataloader) // args.gradient_accumulation_steps * args.num_train_epochs
optimizer = AdamW([
{'params': p_model.parameters()},
{'params': q_model.parameters()}
], lr=args.learning_rate, weight_decay=args.weight_decay)
scheduler = get_linear_schedule_with_warmup(optimizer, num_warmup_steps=args.warmup_steps, num_training_steps=t_total)
# wandb watch
wandb.watch([p_model, q_model], criterion=optimizer)
global_step = 0
p_model.zero_grad()
q_model.zero_grad()
torch.cuda.empty_cache()
train_iterator = trange((int(args.num_train_epochs)), desc='Epoch')
for epoch_index in train_iterator:
epoch_iterator = tqdm(train_dataloader, desc='Iteration')
p_model.train()
q_model.train()
for step, batch in enumerate(epoch_iterator):
# concatenate negative samples and p_seqs
batch[0] = torch.cat((batch[0], batch[6]), dim=0)
batch[1] = torch.cat((batch[1], batch[7]), dim=0)
batch[2] = torch.cat((batch[2], batch[8]), dim=0)
if torch.cuda.is_available():
batch = tuple(t.cuda() for t in batch)
p_inputs = {
'input_ids' : batch[0],
'token_type_ids' : batch[1],
'attention_mask' : batch[2]
}
q_inputs = {
'input_ids' : batch[3],
'token_type_ids' : batch[4],
'attention_mask' : batch[5]
}
p_outputs = p_model(**p_inputs)
q_outputs = q_model(**q_inputs)
# Calculate Similarity
sim_scores = torch.matmul(q_outputs, torch.transpose(p_outputs, 0, 1))
# target
targets = torch.arange(0, len(batch[3])).long()
if torch.cuda.is_available():
targets = targets.to('cuda')
sim_scores = F.log_softmax(sim_scores, dim=1)
loss = F.nll_loss(sim_scores, targets)
wandb.log({'loss': loss, 'lr': optimizer.param_groups[0]['lr']})
loss.backward()
optimizer.step()
scheduler.step()
q_model.zero_grad()
p_model.zero_grad()
global_step += 1
torch.cuda.empty_cache()
with torch.no_grad():
# evaluation
print('let\'s eval')
p_model.eval()
q_model.eval()
p_outputs = []
q_outputs = []
for batch in tqdm(valid_loader):
batch = tuple(t.cuda() for t in batch)
p_inputs = {'input_ids' : batch[0],
'token_type_ids' : batch[1],
'attention_mask' : batch[2]
}
q_inputs = {'input_ids' : batch[3],
'token_type_ids' : batch[4],
'attention_mask' : batch[5]
}
p_outputs.append(p_model(**p_inputs).cpu().numpy())
q_outputs.append(q_model(**q_inputs).cpu().numpy())
p_outputs = np.array(p_outputs).reshape((len(valid_dataset),-1))
q_outputs = np.array(q_outputs).reshape((len(valid_dataset),-1))
sim_scores = np.dot(q_outputs, p_outputs.T)
sorted_scores = np.argsort(sim_scores, axis=1)
top_1_score, top_5_score, top_10_score, top_20_score = 0, 0, 0, 0
for idx in tqdm(range(len(valid_dataset))):
if idx in sorted_scores[idx][:-2:-1]: top_1_score += 1
if idx in sorted_scores[idx][:-6:-1]: top_5_score += 1
if idx in sorted_scores[idx][:-11:-1]: top_10_score += 1
if idx in sorted_scores[idx][:-21:-1]: top_20_score += 1
top_1_score, top_5_score, top_10_score, top_20_score = top_1_score / len(valid_dataset), \
top_5_score / len(valid_dataset), \
top_10_score / len(valid_dataset), \
top_20_score / len(valid_dataset) \
wandb.log({'acc/top_1': top_1_score, 'acc/top_5': top_5_score,
'acc/top_10': top_10_score, 'acc/top_20': top_20_score})
return q_model, p_model
if __name__ == '__main__':
main()