def train(train_file, validation_file, batch_size, epoch_limit, file_name,
gpu_mode):
transformations = transforms.Compose([transforms.ToTensor()])
sys.stderr.write(TextColor.PURPLE + 'Loading data\n' + TextColor.END)
train_data_set = PileupDataset(train_file, transformations)
train_loader = DataLoader(train_data_set,
batch_size=batch_size,
shuffle=True,
num_workers=16,
pin_memory=gpu_mode)
sys.stderr.write(TextColor.PURPLE + 'Data loading finished\n' +
TextColor.END)
model = Model()
if gpu_mode:
model = torch.nn.DataParallel(model).cuda()
# Loss and Optimizer
criterion = nn.CrossEntropyLoss()
optimizer = torch.optim.SGD(model.parameters(), lr=0.001)
# Train the Model
sys.stderr.write(TextColor.PURPLE + 'Training starting\n' + TextColor.END)
seq_len = 3
iteration_jump = 1
for epoch in range(epoch_limit):
total_loss = 0
total_images = 0
total_could_be = 0
for i, (images, labels) in enumerate(train_loader):
hidden = model.init_hidden(images.size(0))
# if batch size not distributable among all GPUs then skip
if gpu_mode is True and images.size(0) % 8 != 0:
continue
images = Variable(images, requires_grad=False)
labels = Variable(labels, requires_grad=False)
if gpu_mode:
images = images.cuda()
labels = labels.cuda()
for row in range(0, images.size(2), iteration_jump):
# segmentation of image. Currently using seq_len
if row + seq_len > images.size(2):
continue
x = images[:, :, row:row + seq_len, :]
y = labels[:, row:row + seq_len]
total_variation = torch.sum(y).data[0]
total_could_be += batch_size
# print(total_variation)
if total_variation == 0 and random.uniform(0, 1) * 100 > 5:
continue
elif random.uniform(0,
1) < total_variation / batch_size < 0.02:
continue
# print(x)
# print(y)
# exit()
# Forward + Backward + Optimize
optimizer.zero_grad()
outputs = model(x, hidden)
hidden = repackage_hidden(hidden)
# print('Label: ', y.data[0])
# print('Values:', outputs.data[0])
# print(y.contiguous().view(-1))
# exit()
# outputs = outputs.view(1, outputs.size(0), -1) required for CTCLoss
loss = criterion(outputs.contiguous().view(-1, 3),
y.contiguous().view(-1))
# print(outputs.contiguous().view(-1, 3).size())
# print(y.contiguous().view(-1).size())
# exit()
loss.backward()
optimizer.step()
# loss count
total_images += batch_size
total_loss += loss.data[0]
sys.stderr.write(TextColor.BLUE + "EPOCH: " + str(epoch) +
" Batches done: " + str(i + 1))
sys.stderr.write(" Loss: " + str(total_loss / total_images) +
"\n" + TextColor.END)
print(
str(epoch) + "\t" + str(i + 1) + "\t" +
str(total_loss / total_images))
# After each epoch do validation
validate(validation_file, batch_size, gpu_mode, model, seq_len)
sys.stderr.write(TextColor.YELLOW + 'Could be: ' +
str(total_could_be) + ' Chosen: ' +
str(total_images) + "\n" + TextColor.END)
sys.stderr.write(TextColor.YELLOW + 'EPOCH: ' + str(epoch))
sys.stderr.write(' Loss: ' + str(total_loss / total_images) + "\n" +
TextColor.END)
torch.save(model, file_name + '_checkpoint_' + str(epoch) + '.pkl')
torch.save(
model.state_dict(),
file_name + '_checkpoint_' + str(epoch) + '-params' + '.pkl')
sys.stderr.write(TextColor.PURPLE + 'Finished training\n' + TextColor.END)
torch.save(model, file_name + '_final.pkl')
sys.stderr.write(TextColor.PURPLE + 'Model saved as:' + file_name +
'.pkl\n' + TextColor.END)
torch.save(model.state_dict(), file_name + '_final_params' + '.pkl')
sys.stderr.write(TextColor.PURPLE + 'Model parameters saved as:' +
file_name + '-params.pkl\n' + TextColor.END)
class BERTable():
def __init__(self,
df,
column_type,
embedding_dim=5,
n_layers=5,
dim_feedforward=100,
n_head=5,
dropout=0.15,
ns_exponent=0.75,
share_category=False,
use_pos=False,
device='cpu'):
self.logger = create_logger(name="BERTable")
self.col_type = {'numerical': [], 'categorical': [], 'vector': []}
for i, data_type in enumerate(column_type):
self.col_type[data_type].append(i)
self.embedding_dim = embedding_dim
self.use_pos = use_pos
self.device = device
self.vocab = Vocab(df, self.col_type, share_category, ns_exponent)
vocab_size = {
'numerical': len(self.vocab.item2idx['numerical']),
'categorical': len(self.vocab.item2idx['categorical'])
}
vector_dims = [np.shape(df[col])[1] for col in self.col_type['vector']]
tab_len = len(column_type)
self.model = Model(vocab_size, self.col_type, use_pos, vector_dims,
embedding_dim, dim_feedforward, tab_len, n_layers,
n_head, dropout)
def pretrain(self,
df,
max_epochs=3,
lr=1e-4,
lr_weight={
'numerical': 0.33,
'categorical': 0.33,
'vector': 0.33
},
loss_clip=[0, 100],
n_sample=4,
mask_rate=0.15,
replace_rate=0.8,
batch_size=32,
shuffle=True,
num_workers=1):
self.model.loss_clip = loss_clip
self.logger.info("[-] Converting to indices")
data = self.vocab.convert(df, num_workers)
self.model.to(self.device)
self.model.train()
optimizer = torch.optim.Adam(self.model.parameters(), lr=float(lr))
self.logger.info("[-] Start Pretraining")
process_bar = tqdm(range(max_epochs),
desc=f"[Progress]",
total=max_epochs,
leave=True,
position=0)
for epoch in process_bar:
generator = create_dataloader(data,
self.col_type,
self.vocab,
self.embedding_dim,
self.use_pos,
batch_size,
num_workers,
mask_rate=mask_rate,
replace_rate=replace_rate,
n_sample=n_sample,
shuffle=shuffle)
metric_bar = tqdm([0],
desc=f"[Metric]",
bar_format="{desc} {postfix}",
leave=False,
position=2)
epoch_bar = tqdm(generator,
desc=f"[Epoch]",
leave=False,
position=1)
loss_history = {'numerical': [], 'categorical': [], 'vector': []}
for batch_data in epoch_bar:
batch_data = transfer(batch_data, self.device)
_, losses = self.model.forward(batch_data, mode='train')
loss = sum([
losses[data_type] / len(self.col_type[data_type]) *
lr_weight[data_type] for data_type in self.col_type
if len(self.col_type[data_type]) > 0
])
optimizer.zero_grad()
loss.backward()
optimizer.step()
display = ''
for types in losses:
loss_history[types].append(losses[types].item())
display += f'{types}: {np.mean(loss_history[types]):5.2f} '
metric_bar.set_postfix_str(display)
process_bar.write(f'[Log] Epoch {epoch:0>2d}| ' + display)
epoch_bar.close()
metric_bar.close()
process_bar.close()
self.model.cpu()
# def transform(self, df, batch_size=32, num_workers=1):
# self.logger.info("[-] Converting to indices")
# data = self.vocab.convert(df, num_workers)
# generator = create_dataloader(
# data, self.col_type, self.vocab,
# self.embedding_dim, self.use_pos,
# batch_size, num_workers, mode='test')
# self.logger.info("[-] Start Transforming")
# process_bar = tqdm(
# generator,
# desc=f"[Process]",
# leave=False,
# position=0)
# self.model.to(self.device)
# self.model.eval()
# df_t = []
# for batch_data in process_bar:
# batch_data = transfer(batch_data, self.device)
# feature = self.model.forward(batch_data, mode='test')
# df_t += list(feature.cpu().detach().numpy())
# process_bar.close()
# self.model.cpu()
# return df_t
def save(self, model_path='model.ckpt', vocab_path='vocab.pkl'):
torch.save(self.model.state_dict(), model_path)
with open(vocab_path, 'wb') as file:
pkl.dump(self.vocab, file)
def training_process(device, nb_class_labels, model_path, result_dir, patience,
epochs, do_pre_train, tr_feat_path, tr_labels_path,
val_feat_path, val_labels_path, tr_batch_size,
val_batch_size, adapt_patience, adapt_epochs, d_lr,
tgt_lr, update_cnt, factor):
"""Implements the complete training process of the AUDASC method.
:param device: The device that we will use.
:type device: str
:param nb_class_labels: The amount of labels for label classification.
:type nb_class_labels: int
:param model_path: The path of previously saved model (if any)
:type model_path: str
:param result_dir: The directory to save newly pre-trained model.
:type result_dir: str
:param patience: The patience for the pre-training step.
:type patience: int
:param epochs: The epochs for the pre-training step.
:type epochs: int
:param do_pre_train: Flag to indicate if we do pre-training.
:type do_pre_train: bool
:param tr_feat_path: The path for loading the training features.
:type tr_feat_path: str
:param tr_labels_path: The path for loading the training labels.
:type tr_labels_path: str
:param val_feat_path: The path for loading the validation features.
:type val_feat_path: str
:param val_labels_path: The path for loading the validation labels.
:type val_labels_path: str
:param tr_batch_size: The batch used for pre-training.
:type tr_batch_size: int
:param val_batch_size: The batch size used for validation.
:type val_batch_size: int
:param adapt_patience: The patience for the domain adaptation step.
:type adapt_patience: int
:param adapt_epochs: The epochs for the domain adaptation step.
:type adapt_epochs: int
:param d_lr: The learning rate for the discriminator.
:type d_lr: float
:param tgt_lr: The learning rate for the adapted model.
:type tgt_lr: float
:param update_cnt: An update controller for adversarial loss
:type update_cnt: int
:param factor: the coefficient used to be multiplied by classification loss.
:type factor: int
"""
tr_feat = device_exchange(file_io.load_pickled_features(tr_feat_path),
device=device)
tr_labels = device_exchange(file_io.load_pickled_features(tr_labels_path),
device=device)
val_feat = device_exchange(file_io.load_pickled_features(val_feat_path),
device=device)
val_labels = device_exchange(
file_io.load_pickled_features(val_labels_path), device=device)
loss_func = functional.cross_entropy
non_adapted_cnn = Model().to(device)
label_classifier = LabelClassifier(nb_class_labels).to(device)
if not path.exists(result_dir):
makedirs(result_dir)
if do_pre_train:
state_dict_path = result_dir
printing.info_msg('Pre-training step')
optimizer_source = torch.optim.Adam(
list(non_adapted_cnn.parameters()) +
list(label_classifier.parameters()),
lr=1e-4)
pre_training.pre_training(model=non_adapted_cnn,
label_classifier=label_classifier,
optimizer=optimizer_source,
tr_batch_size=tr_batch_size,
val_batch_size=val_batch_size,
tr_feat=tr_feat['A'],
tr_labels=tr_labels['A'],
val_feat=val_feat['A'],
val_labels=val_labels['A'],
epochs=epochs,
criterion=loss_func,
patience=patience,
result_dir=state_dict_path)
del optimizer_source
else:
printing.info_msg('Loading a pre-trained non-adapted model')
state_dict_path = model_path
if not path.exists(state_dict_path):
raise ValueError(
'The path for loading the pre trained model does not exist!')
non_adapted_cnn.load_state_dict(
torch.load(path.join(state_dict_path, 'non_adapted_cnn.pytorch')))
label_classifier.load_state_dict(
torch.load(path.join(state_dict_path, 'label_classifier.pytorch')))
printing.info_msg('Training the Adversarial Adaptation Model')
target_cnn = Model().to(device)
target_cnn.load_state_dict(non_adapted_cnn.state_dict())
discriminator = Discriminator(2).to(device)
target_model_opt = torch.optim.Adam(target_cnn.parameters(), lr=tgt_lr)
discriminator_opt = torch.optim.Adam(discriminator.parameters(), lr=d_lr)
domain_adaptation.domain_adaptation(
non_adapted_cnn, target_cnn, label_classifier, discriminator,
target_model_opt, discriminator_opt, loss_func, loss_func, loss_func,
tr_feat, tr_labels, val_feat, val_labels, adapt_epochs, update_cnt,
result_dir, adapt_patience, device, factor)
class Train:
def __init__(self, model_name, corpus_dataset):
self._config = TrainConfig()
self._model_name = model_name
self._data_loader = corpus_dataset.get_data_loader(
self._config.batch_size)
self._vocabulary = corpus_dataset.vocabulary
self._model = Model(vocabulary=corpus_dataset.vocabulary,
training=True)
# TODO: Support for other optimizers
self._optimizer = optim.Adam(self._model.parameters(),
lr=self._config.learning_rate)
self._global_step = -1
self._train_logger = logging.getLogger('Train')
logging.basicConfig(level=logging.INFO)
def train_step(self, input_seqs, input_lengths, target_seqs, masks):
self._optimizer.zero_grad()
step_loss, print_loss, _ = self._model(input_seqs, input_lengths,
target_seqs, masks,
self._global_step)
self._train_logger.info('Step {}: Training loss: {}'.format(
self._global_step, print_loss))
step_loss.backward()
if self._config.use_gradient_clipping:
_ = nn.utils.clip_grad_norm_(self._model.parameters(),
self._config.gradient_clipping_value)
self._optimizer.step()
def train(self,
num_steps,
save_num_steps,
save_folder='./data/models/train_dev'):
if self._global_step < 0:
self._global_step = 0
elif self._global_step >= num_steps:
logging.info(
'Global step past number of steps requested. No training needed. Global Step = {}. '
'Num training steps = {}'.format(self._global_step, num_steps))
return
stop_training = False
while not stop_training:
for input_seqs, input_lengths, target_seqs, masks in self._data_loader:
self.train_step(input_seqs, input_lengths, target_seqs, masks)
self._global_step += 1
if self._global_step % save_num_steps == 0:
self.save_checkpoint(save_folder)
just_saved = True
else:
just_saved = False
if self._global_step >= num_steps:
stop_training = True
logging.info('Finished training at step {}'.format(
self._global_step))
if not just_saved:
self.save_checkpoint(save_folder)
break
def save_checkpoint(self, save_folder):
makedirs(save_folder, exist_ok=True)
save_path = path.join(save_folder,
'checkpoint-{}.tar'.format(self._global_step))
logging.info('Saving checkpoint at step {}'.format(self._global_step))
torch.save(
{
'name': self._model_name,
'global_step': self._global_step,
'model': self._model.state_dict(),
'optimizer': self._optimizer.state_dict(),
'vocabulary': self._vocabulary.__dict__,
}, save_path)
logging.info('Checkpoint saved at {}'.format(save_path))
@staticmethod
def load_from_checkpoint(checkpoint_path, corpus_dataset):
checkpoint = torch.load(checkpoint_path)
train_obj = Train(checkpoint['name'], corpus_dataset)
train_obj._vocabulary.__dict__ = checkpoint['vocabulary']
train_obj._global_step = checkpoint['global_step']
train_obj._model.load_state_dict(checkpoint['model'])
train_obj._train_logger.info(
'Restored from checkpoint {}'.format(checkpoint_path))
return train_obj