def fit(self, model, train_loader, val_loader, test_loader):
optimizer = torch.optim.Adam(filter(lambda p: p.requires_grad,
model.parameters()),
lr=1e-4,
weight_decay=1e-5)
stopper = EarlyStopping(self.model_path,
self.tasks,
patience=self.patience)
self._train(model, train_loader, val_loader, self.loss_fn, optimizer,
stopper)
stopper.load_checkpoint(model)
test_results_dict = self._eval(model, test_loader)
for metric in self.metrics:
print(f"test {metric}:{test_results_dict[metric]['mean']}")
return model, test_results_dict
def trainNet(model, train_loader, val_loader, device, static_map, start_epoch=0, globaliter_=0):
# Print all of the hyper parameters of the training iteration:
print("===== HYPERPARAMETERS =====")
print("batch_size=", config['dataloader']['batch_size'])
print("epochs=", config['num_epochs'])
print('starting from epoch %i' % start_epoch)
print("learning_rate=", config['optimizer']['lr'])
print("network_depth=", config['model']['depth'])
print("=" * 30)
# define the optimizer & learning rate
optim = torch.optim.SGD(model.parameters(), **config['optimizer'])
scheduler = StepLR(optim,
step_size=config['lr_step_size'],
gamma=config['lr_gamma'])
if config['cont_model_path'] is not None:
log_dir = config['cont_model_path']
else:
log_dir = 'runs/Unet-' + datetime.now().strftime("%Y-%m-%d-%H-%M-%S-") + \
'-'.join(config['dataset']['cities'])
writer = Visualizer(log_dir)
# dump config file
with open(os.path.join(log_dir, 'config.json'), 'w') as fp:
json.dump(config, fp)
# Time for printing
training_start_time = time.time()
globaliter = globaliter_
# initialize the early_stopping object
early_stopping = EarlyStopping(log_dir, patience=config['patience'], verbose=True)
# Loop for n_epochs
for epoch_idx, epoch in enumerate(range(start_epoch, config['num_epochs'])):
writer.write_lr(optim, epoch)
# train for one epoch
globaliter = train(model, train_loader, static_map, optim, device, writer, epoch, globaliter)
# At the end of the epoch, do a pass on the validation set
val_loss = validate(model, val_loader, static_map, device, writer, globaliter)
# At the end of the epoch, do a pass on the validation set only considering the test times
# val_loss_testtimes = validate(model, val_loader_ttimes, device, writer, globaliter, if_testtimes=True)
# early_stopping needs the validation loss to check if it has decresed,
# and if it has, it will make a checkpoint of the current model
early_stopping(val_loss, model, epoch+1, globaliter)
if early_stopping.early_stop:
print("Early stopping")
break
if config['debug'] and epoch_idx >= 0:
break
scheduler.step(epoch)
print("Training finished, took {:.2f}s".format(time.time() - training_start_time))
# remember to close tensorboard writer
writer.close()
def train_test(self):
#load model if model exists weigh initialization
if self.config.load_model is True:
self.model.load_model()
else:
self.model.weight_init()
print('weight is initilized')
# optimizer
self.momentum = 0.9
self.optimizer = optim.Adam(self.model.parameters(), lr=self.config.lr, weight_decay=1.0)
# scheduler = lr_scheduler.StepLR(self.optimizer, step_size=70, gamma=0.01)
scheduler = lr_scheduler.ExponentialLR(self.optimizer, gamma=0.9)
# loss function
if self.config.gpu_mode:
self.model.cuda()
self.MSE_loss = nn.MSELoss().cuda()
else:
self.MSE_loss = nn.MSELoss()
print('---------- Networks architecture -------------')
utils.print_network(self.model)
print('----------------------------------------------')
# load dataset
train_data_loader = self.data_train
test_data_loader = self.data_test
################# Train #################
print('Training is started.')
avg_loss = []
avg_loss_test = []
avg_loss_log_test = []
step = 0
es = EarlyStopping(patience=8)
self.model.train() # It just sets the training mode.model.eval() to set testing mode
for epoch in range(self.config.num_epochs):
scheduler.step()
epoch_loss = 0
for iter, (input, target, _) in enumerate(train_data_loader):
# input data (low resolution image)
if self.config.gpu_mode:
x_ = Variable(input.cuda())
y_ = Variable(target.cuda())
else:
x_ = Variable(input)
y_ = Variable(target)
# update network
self.optimizer.zero_grad()
model_out = self.model(x_)
loss = torch.sqrt(self.MSE_loss(model_out, y_))
loss.backward() # 结果得到是tensor
self.optimizer.step()
# log
epoch_loss += loss
print("Epoch: [%2d] [%4d/%4d] loss: %.8f" % ((epoch + 1), (iter + 1), len(train_data_loader), loss))
# tensorboard logging
self.logger.scalar_summary('loss', loss, step + 1)
step += 1
# avg. loss per epoch
avg_loss.append((epoch_loss / len(train_data_loader)).detach().cpu().numpy())
if (epoch + 1) % self.config.save_epochs == 0:
self.model.save_model(epoch + 1)
# caculate test loss
with torch.no_grad():
loss_test, loss_log_test = self.test(test_data_loader)
epoch_loss_test = loss_test / len(test_data_loader)
epoch_loss_log_test = loss_log_test / len(test_data_loader)
avg_loss_test.append(float(epoch_loss_test))
avg_loss_log_test.append(float(epoch_loss_log_test))
# if es.step(float(epoch_loss_test)):
# self.model.save_model(epoch=None)
# print('Early stop at %2d epoch' % (epoch + 1))
# break
# Plot avg. loss
utils.plot_loss(self.config, [avg_loss, avg_loss_log_test])
utils.plot_loss(self.config, [avg_loss_test], origin=True)
print('avg_loss: ', avg_loss[-1])
print('avg_loss_log with original data: ', avg_loss_test[-1])
print('avg_loss_log with log data: ', avg_loss_log_test[-1])
print("Training and test is finished.")
# Save final trained parameters of model
self.model.save_model(epoch=None)
writer = Visualizer(log_dir)
with open(os.path.join(log_dir, 'config.json'), 'w') as fp:
json.dump(config, fp)
# define device
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
# model
model = diff_pool_net2(dataset, **config['model']).to(device)
data = data.to(device)
lr = config['optimizer']['lr']
optimizer = torch.optim.Adam(model.parameters(), lr=lr)
# initialize the early_stopping object
early_stopping = EarlyStopping(log_dir,
patience=config['patience'],
verbose=False)
best_val_acc = test_acc = 0
for epoch in range(1, config['epochs']):
output_dict = train()
accs, s = test()
train_acc, val_acc, tmp_test_acc = accs
writer.write_lr(optimizer, epoch)
if val_acc > best_val_acc:
best_val_acc = val_acc
test_acc = tmp_test_acc
writer.write_acc_train(train_acc, epoch)
def bcn(config, data_file, embeddings, device, dataset, embeddings_type):
# extensions : add 2 languages, use a combination of CoVe embeddings (like ELMo)
name = "test_model"
torch.manual_seed(123)
inputs = data.Field(lower=True, include_lengths=True, batch_first=True)
labels = data.Field(sequential=False, unk_token=None)
print('Generating train, dev, test splits')
if dataset == 'IWSLT':
# using the IWSLT 2016 TED talk translation task
train, dev, test = datasets.IWSLT.splits(root=data_file,
exts=['.en', '.de'],
fields=[inputs, inputs])
elif dataset == 'SST-2':
train, dev, test = datasets.SST.splits(
text_field=inputs,
label_field=labels,
root=data_file,
fine_grained=False,
train_subtrees=True,
filter_pred=lambda ex: ex.label != 'neutral')
elif dataset == 'SST-5':
train, dev, test = datasets.SST.splits(text_field=inputs,
label_field=labels,
root=data_file,
fine_grained=True,
train_subtrees=True)
elif dataset == 'IMDB':
train, test = datasets.IMDB.splits(text_field=inputs,
label_field=labels,
root=data_file)
train, dev = train.split(
split_ratio=0.9,
stratified=True) # 0.9 in order to be close to the paper
elif dataset == 'TREC-6':
train, test = datasets.TREC.splits(text_field=inputs,
label_field=labels,
root=data_file,
fine_grained=False)
train, dev = train.split(split_ratio=0.9, stratified=True)
elif dataset == 'TREC-50':
train, test = datasets.TREC.splits(text_field=inputs,
label_field=labels,
root=data_file,
fine_grained=True)
train, dev = train.split()
elif dataset == 'SNLI':
train, dev, test = datasets.SNLI.splits(text_field=inputs,
label_field=labels,
root=data_file)
else:
print('Invalid dataset name detected...')
return
print('Building vocabulary')
inputs.build_vocab(train, dev, test)
inputs.vocab.load_vectors(
vectors=GloVe(name='840B', dim=300, cache=embeddings))
labels.build_vocab(train, dev, test)
train_iter, dev_iter, test_iter = data.BucketIterator.splits(
(train, dev, test),
batch_size=config["train_batch_size"],
device=torch.device(device) if device >= 0 else None,
sort_within_batch=True)
model = BCN(config=config,
n_vocab=len(inputs.vocab),
vocabulary=inputs.vocab.vectors,
embeddings=embeddings,
num_labels=len(labels.vocab.freqs),
embeddings_type=embeddings_type)
bcn_params = [
p for n, p in model.named_parameters()
if "mtlstm" not in n and p.requires_grad
]
criterion = nn.CrossEntropyLoss()
optimizer = Adam(bcn_params, lr=0.001)
if device != -1:
model.to(device)
print(model)
total_params = sum(p.numel() for p in model.parameters())
total_trainable_params = sum(p.numel() for p in bcn_params
if p.requires_grad)
print("Total Params:", number_h(total_params))
print("Total Trainable Params:", number_h(total_trainable_params))
#####################################
# Training Pipeline
#####################################
trainer = BCNTrainer(model=model,
train_loader=train_iter,
valid_loader=dev_iter,
criterion=criterion,
device="cpu" if device == -1 else 'cuda',
config=config,
optimizers=[optimizer])
print('Generating CoVe')
####################################################################
# Experiment: logging and visualizing the training process
####################################################################
exp = Experiment(name, config, src_dirs=None, output_dir=EXP_DIR)
exp.add_metric("ep_loss", "line", "epoch loss class", ["TRAIN", "VAL"])
exp.add_metric("ep_f1", "line", "epoch f1", ["TRAIN", "VAL"])
exp.add_metric("ep_acc", "line", "epoch accuracy", ["TRAIN", "VAL"])
exp.add_value("epoch", title="epoch summary")
exp.add_value("progress", title="training progress")
####################################################################
# Training Loop
####################################################################
best_loss = None
early_stopping = EarlyStopping("min", config["patience"])
for epoch in range(1, config["epochs"] + 1):
train_loss = trainer.train_epoch()
print(model.w, model.gama)
val_loss, y, y_pred = trainer.eval_epoch()
# Calculate accuracy and f1-macro on the evaluation set
exp.update_metric("ep_loss", train_loss.item(), "TRAIN")
exp.update_metric("ep_loss", val_loss.item(), "VAL")
exp.update_metric("ep_f1", 0, "TRAIN")
exp.update_metric("ep_f1", f1_macro(y, y_pred), "VAL")
exp.update_metric("ep_acc", 0, "TRAIN")
exp.update_metric("ep_acc", acc(y, y_pred), "VAL")
print()
epoch_log = exp.log_metrics(["ep_loss", "ep_f1", "ep_acc"])
print(epoch_log)
exp.update_value("epoch", epoch_log)
# Save the model if the val loss is the best we've seen so far.
if not best_loss or val_loss < best_loss:
best_loss = val_loss
trainer.best_acc = acc(y, y_pred)
trainer.best_f1 = f1_macro(y, y_pred)
trainer.checkpoint(name=name)
if early_stopping.stop(val_loss):
print("Early Stopping (according to cls loss)....")
break
print("\n" * 2)
return best_loss, trainer.best_acc, trainer.best_f1
def train(config, model, train_loader, val_loader, optimizer):
if not os.path.exists('./runs'):
os.mkdir('./runs')
if not os.path.exists('./checkpoints'):
os.mkdir('./checkpoints')
writer = SummaryWriter('./runs/{}'.format(config.exp_name))
early_stopping = EarlyStopping(save_dir=config.save_dir,
model_type=config.exp_name,
patience=config.patience,
verbose=True)
for epoch in tqdm(range(1, config.n_epochs + 1)):
highlight_loss = []
# Training
model.train()
for batch_idx, data in enumerate(train_loader):
# zero the grads
optimizer.zero_grad()
# handle the case of history vs. non-history training
if len(data) == 4: # is_history = False
vid_feat_tensor, gt_strided_binary, user_path, nframes = data
# convert data to cuda
vid_feat_tensor, gt_strided_binary = vid_feat_tensor.unsqueeze(
dim=2).transpose(1, 3).cuda(), gt_strided_binary.view(
1, 1, -1).cuda()
# forward to model
output = model(vid_feat_tensor)
else: # is_history = True i.e. len(data) = 5
vid_feat_tensor, gt_strided_binary, usr_hist_list, usr_path, nframes = data
# check if usr_hist_list has some data
if len(usr_hist_list) == 0:
continue
else:
pass
# convert data to cuda
vid_feat_tensor, gt_strided_binary, usr_hist_list = vid_feat_tensor.unsqueeze(
dim=2).transpose(1, 3).cuda(), gt_strided_binary.view(
1, 1, -1).cuda(), [
hist.float().cuda() for hist in usr_hist_list
]
# forward to the model with history
output = model(vid_feat_tensor, usr_hist_list)
# compute loss
loss = cross_entropy2d(output, gt_strided_binary)
# backward and update the model
loss.backward()
optimizer.step()
highlight_loss.append(loss.item())
if batch_idx % config.print_interval == 0:
print('Train Epoch: {} [{}/{}]\tLoss: {:.6f}'.format(
epoch, batch_idx + 1, len(train_loader), loss.item()))
mean_highlight_loss = np.average(highlight_loss)
writer.add_scalar('Train/loss', mean_highlight_loss, epoch)
# Validation
if config.is_validate and epoch % config.validate_interval == 0:
avg_map, avg_val_loss = validate(config, model, val_loader)
# val avg_map for early stopping
early_stopping(avg_map, model, epoch)
if early_stopping.early_stop:
print("Early stopping")
break
writer.add_scalar('Val/mAP', avg_map, epoch)
writer.add_scalar('Val/Loss', avg_val_loss, epoch)
# close summary writer
writer.close()
return
from torchsummary import summary
from models.resnet import *
from models.resnext import *
from models.densenet import *
from utils.arg_utils import *
from utils.data_utils import *
from utils.progress_utils import progress_bar
from utils.earlystopping import EarlyStopping
"""
arguments
"""
args = fetch_args()
device = 'cuda' if torch.cuda.is_available() else 'cpu'
early_stopping = EarlyStopping(args['patience'],
verbose=True,
delta=args['delta'])
"""
loading data-set....
"""
print("==> loading data-set...")
train_loader, classes = gen_train_loader(args['train_path'],
args['input_size'],
args['train_batch_size'])
test_loader, _ = gen_test_loader(args['test_path'], args['input_size'],
args['test_batch_size'])
print('Task classes are: ', classes)
num_classes = len(classes)
print(num_classes)
"""
model
def train(
self, train_loader, val_loader=None, max_epochs=1000, enable_early_stopping=True
):
if val_loader is None:
enable_early_stopping = False
print()
print("-" * 2, "Training Setup", "-" * 2)
print(f"Maximum Epochs: {max_epochs}")
print(f"Enable Early Stoping: {enable_early_stopping}")
print("-" * 20)
print("*Start Training.")
# model setup
self.model.train().to(self.device)
if self.multi_gpus and torch.cuda.device_count() > 1:
print(f"*Using {torch.cuda.device_count()} GPUs!")
self.model = nn.DataParallel(self.model)
# early stopping instance
if enable_early_stopping:
if self.early_stopping is None:
self.early_stopping = EarlyStopping(patience=5)
else:
self.early_stopping.reset_counter()
# training start!
for epoch in range(1, max_epochs + 1):
running_loss = 0.0
for step, data in enumerate(train_loader, start=1):
inputs, labels = data
inputs, labels = inputs.to(self.device), labels.to(self.device)
# Zero the parameter gradients
self.optimizer.zero_grad()
# forward + backward + optimize
outputs = self.model(inputs)
loss = self.loss_func(outputs, labels)
loss.backward()
self.optimizer.step()
# print statistics
running_loss += loss.item()
if step % 100 == 0 or step == len(train_loader):
print(
f"[{epoch}/{max_epochs}, {step}/{len(train_loader)}] loss: {running_loss / step :.3f}"
)
# train & validation loss
train_loss = running_loss / len(train_loader)
if val_loader is None:
print(f"train loss: {train_loss:.3f}")
else:
# FIXME: fixed the problem that first validation is not correct
val_loss = self.validation(val_loader)
print(f"train loss: {train_loss:.3f}, val loss: {val_loss:.3f}")
if enable_early_stopping:
self.early_stopping(self.model, val_loss, self.optimizer)
if self.early_stopping.get_early_stop() == True:
print("*Early Stopping.")
break
print("*Finished Training!")
if enable_early_stopping:
checkpoint = self.early_stopping.get_checkpoint()
else:
checkpoint = Checkpoint()
checkpoint.tmp_save(self.model, self.optimizer, epoch, val_loss)
self.checkpoint = checkpoint
self.model = checkpoint.load(self.model, self.optimizer)["model"]
return self.model
class ModelWrapper(DefaultSetting):
def __init__(
self,
model,
loss_func=None,
optimizer=None,
device=None,
multi_gpus=True,
log=100,
):
super().__init__(device, loss_func)
self.model = model
if optimizer is None:
self.optimizer = self.default_optimizer(model)
else:
self.optimizer = optimizer
self.multi_gpus = multi_gpus
self.log = log
self.checkpoint = None
self.early_stopping = None
# TODO: haven't check this this function (__call__) yet
# update model setting
def __call__(
self,
model=None,
loss_func=None,
optimizer=None,
device=None,
multi_gpus=None,
log=None,
):
if model is not None:
self.model = model
if optimizer is None:
self.optimizer = self.default_optimizer(self.model)
else:
self.optimizer = optimizer
if loss_func is not None:
self.loss_func = loss_func
if device is not None:
self.device = device
if multi_gpus is not None:
self.multi_gpus = multi_gpus
if self.log is not None:
self.log = log
self.checkpoint = None
self.early_stopping = None
# train model
def train(
self, train_loader, val_loader=None, max_epochs=1000, enable_early_stopping=True
):
if val_loader is None:
enable_early_stopping = False
print()
print("-" * 2, "Training Setup", "-" * 2)
print(f"Maximum Epochs: {max_epochs}")
print(f"Enable Early Stoping: {enable_early_stopping}")
print("-" * 20)
print("*Start Training.")
# model setup
self.model.train().to(self.device)
if self.multi_gpus and torch.cuda.device_count() > 1:
print(f"*Using {torch.cuda.device_count()} GPUs!")
self.model = nn.DataParallel(self.model)
# early stopping instance
if enable_early_stopping:
if self.early_stopping is None:
self.early_stopping = EarlyStopping(patience=5)
else:
self.early_stopping.reset_counter()
# training start!
for epoch in range(1, max_epochs + 1):
running_loss = 0.0
for step, data in enumerate(train_loader, start=1):
inputs, labels = data
inputs, labels = inputs.to(self.device), labels.to(self.device)
# Zero the parameter gradients
self.optimizer.zero_grad()
# forward + backward + optimize
outputs = self.model(inputs)
loss = self.loss_func(outputs, labels)
loss.backward()
self.optimizer.step()
# print statistics
running_loss += loss.item()
if step % 100 == 0 or step == len(train_loader):
print(
f"[{epoch}/{max_epochs}, {step}/{len(train_loader)}] loss: {running_loss / step :.3f}"
)
# train & validation loss
train_loss = running_loss / len(train_loader)
if val_loader is None:
print(f"train loss: {train_loss:.3f}")
else:
# FIXME: fixed the problem that first validation is not correct
val_loss = self.validation(val_loader)
print(f"train loss: {train_loss:.3f}, val loss: {val_loss:.3f}")
if enable_early_stopping:
self.early_stopping(self.model, val_loss, self.optimizer)
if self.early_stopping.get_early_stop() == True:
print("*Early Stopping.")
break
print("*Finished Training!")
if enable_early_stopping:
checkpoint = self.early_stopping.get_checkpoint()
else:
checkpoint = Checkpoint()
checkpoint.tmp_save(self.model, self.optimizer, epoch, val_loss)
self.checkpoint = checkpoint
self.model = checkpoint.load(self.model, self.optimizer)["model"]
return self.model
# %% validation
@torch.no_grad()
def validation(self, val_loader):
self.model.eval().to(self.device)
running_loss = 0.0
for data in val_loader:
inputs, labels = data
inputs, labels = inputs.to(self.device), labels.to(self.device)
outputs = self.model(inputs)
loss = self.loss_func(outputs, labels)
running_loss += loss.item()
return running_loss / len(val_loader)
# classification report of the model on test data
@torch.no_grad()
def classification_report(
self, test_loader, target_names=None, binary=False, visualize=False
):
print("-" * 10, "Classification Report", "-" * 10)
print(f"loss: {self.validation(test_loader)}")
model = self.model
model.eval().to(self.device)
y_pred, y_true = [], []
for data in test_loader:
inputs, labels = data
inputs, labels = inputs.to(self.device), labels.to(self.device).long()
outputs = model(inputs)
if not binary:
_, predicted = torch.max(outputs, 1)
else:
predicted = torch.round(outputs)
y_true += labels.squeeze().cpu().tolist()
y_pred += predicted.squeeze().cpu().tolist()
if visualize:
vis = Visualization(y_true, y_pred, target_names)
vis.confusion_matrix()
vis.classification_report()
vis.show()
report = classification_report(y_true, y_pred, target_names=target_names)
print(report)
return report
def trainNet(model, train_loader, val_loader, device, adj, nn_ixs, edge_index, config, log_dir, coords=None):
"""
Args:
model:
train_loader:
val_loader:
device:
adj:
nn_ixs:
edge_index:
config:
log_dir:
coords:
Returns:
"""
# define the optimizer & learning rate
optim = torch.optim.Adam(model.parameters(), **config['optimizer'])
# scheduler = StepLR(optim, step_size=config['lr_step_size'], gamma=config['lr_gamma'])
writer = Visualizer(log_dir)
# dump config file
with open(os.path.join(log_dir, 'config.json'), 'w') as fp:
json.dump(config, fp)
# Time for printing
training_start_time = time.time()
globaliter = 0
# initialize the early_stopping object
early_stopping = EarlyStopping(log_dir, patience=config['patience'], verbose=True)
# adj = adj.to(device)
batch_size = config['dataloader']['batch_size']
print_every_step = config['print_every_step']
# Loop for n_epochs
for epoch_idx, epoch in enumerate(range(config['num_epochs'])):
writer.write_lr(optim, globaliter)
# train for one epoch
globaliter = train(model=model, train_loader=train_loader, optim=optim, device=device, writer=writer,
epoch=epoch, globaliter=globaliter, adj=adj, nn_ixs=nn_ixs, edge_index=edge_index,
batch_size=batch_size, coords=coords, print_every_step=print_every_step)
# At the end of the epoch, do a pass on the validation set
# val_loss = validate(model, val_loader, device, writer, globaliter, adj, nn_ixs, edge_index)
val_loss = validate(model=model, val_loader=val_loader, device=device, adj=adj, nn_ixs=nn_ixs,
edge_index=edge_index, batch_size=batch_size, coords=coords,
writer=writer, globaliter=globaliter)
# early_stopping needs the validation loss to check if it has decresed,
# and if it has, it will make a checkpoint of the current model
early_stopping(val_loss, model)
if early_stopping.early_stop:
print("Early stopping")
break
if config['debug'] and epoch_idx >= 0:
break
# scheduler.step()
print("Training finished, took {:.2f}s".format(time.time() - training_start_time))
# remember to close writer
writer.close()
def train(self,
optimizer,
criterion,
batch_size=1,
epochs=1,
kfold=2,
iteration=1,
shuffle=True,
random_state=None,
filepath=None,
patience=7):
best_state = []
best_accuracy = 0.
_kfold = KFold(n_splits=kfold,
shuffle=shuffle,
random_state=random_state)
_data = self.dataset.data.numpy() if isinstance(
self.dataset.data, torch.Tensor) else self.dataset.data
_label = self.dataset.label
minimum_early_stopping_epochs = 10
result = np.zeros((iteration, kfold), dtype=np.float)
for iter_index in range(iteration):
for fold_index, (train_idx,
test_idx) in enumerate(_kfold.split(_data)):
print("=" * 12)
print("Iter {} Fold {}".format(iter_index, fold_index))
print("=" * 12)
_model = self.model
_model.load_state_dict(self.reset_state)
x_train_fold = torch.from_numpy(_data[train_idx]).float()
x_test_fold = torch.from_numpy(_data[test_idx]).float()
y_train_fold = torch.from_numpy(_label[train_idx])
y_test_fold = torch.from_numpy(_label[test_idx])
train_data = TensorDataset(x_train_fold, y_train_fold)
test_data = TensorDataset(x_test_fold, y_test_fold)
train_loader = DataLoader(train_data,
batch_size=batch_size,
shuffle=False)
test_loader = DataLoader(test_data,
batch_size=batch_size,
shuffle=False)
early_stopping = EarlyStopping(patience=patience)
for epoch in range(epochs):
_model.train()
for index, (data, label) in enumerate(train_loader):
data, label = data.to(self.DEVICE), label.to(
self.DEVICE)
optimizer.zero_grad()
output = _model(data)
loss = criterion(output, label)
loss.backward()
optimizer.step()
print(
"Epoch{} Training {:5.2f}% | Loss: {:.4f}".format(
epoch, (index + 1) * batch_size /
len(train_loader.dataset) * 100., loss.item()),
end='\r')
#print(_model.output_layer.weight.grad)
_model.eval()
test_loss = 0.
correct = 0
with torch.no_grad():
for index, (data, label) in enumerate(test_loader):
data, label = data.to(self.DEVICE), label.to(
self.DEVICE)
output = _model(data)
loss = criterion(output, label)
test_loss += loss.item()
# Loss history?
pred = output.data.max(1, keepdim=True)[1]
correct += pred.eq(
label.data.view_as(pred)).cpu().sum()
print("Testing... {:5.2f}%".format(
(index + 1) * batch_size /
len(test_loader.dataset)),
end='\r')
test_loss /= len(test_loader.dataset)
accuracy = correct / float(len(test_loader.dataset))
result[iter_index, fold_index] = accuracy
print(
"Epoch{} Test Result: loss {:.4f} | accuracy {:.5f}({}/{})"
.format(epoch, test_loss, accuracy, correct,
len(test_loader.dataset)))
if filepath is not None:
if not os.path.isdir(filepath):
os.mkdir(filepath)
torch.save(
_model.state_dict(),
os.path.join(
filepath, f"model{iter_index}_{fold_index}_" +
datetime.datetime.now().strftime(
"%m%d_%H:%M:%S")))
if epoch >= minimum_early_stopping_epochs:
early_stopping(test_loss)
if early_stopping.early_stop:
print("Early stopping")
break
iter_accuracy = result[iter_index].mean()
if (iter_accuracy > best_accuracy):
best_state = _model.state_dict()
best_accuracy = iter_accuracy
print('=' * 12)
print(
"Iteration {} complete with {:5.2f}% average accuracy".format(
iter_index, iter_accuracy * 100.))
print('=' * 12)
print("Training complete with {:5.2f}%".format(result.mean()))
self.model.load_state_dict(best_state)
return result
train_dataset = CTScanDataset(train_path, transform=composed)
trainloader = DataLoader(train_dataset, batch_size=batch_size, shuffle=True)
val_dataset = CTScanDataset(val_path, transform=composed)
valloader = DataLoader(val_dataset, batch_size=val_batch_size)
dev = torch.device(
"cuda") if torch.cuda.is_available() else torch.device("cpu")
model = Register3d(trainloader[0].size, device=dev, linear=affine_transform)
model.to(dev)
loss_func = nn.MSELoss()
optimizer = optim.Adam(model.parameters(), lr=1e-3)
scheduler = optim.lr_scheduler.ReduceLROnPlateau(optimizer, factor=0.1,
patience=50, verbose=True)
early_stop = EarlyStopping(patience=100, verbose=True)
for epoch in range(num_epochs):
train_bar = tqdm(trainloader)
for source, target in train_bar:
source, target = source.to(dev), target.to(dev)
optimizer.zero_grad()
model.train()
if affine_transform:
output, deform_grads, theta = model(source, target)
else:
output, deform_grads = model(source, target)
loss = loss_func(output, target)
if affine_transform:
loss += alpha*torch.sum(torch.abs(theta-torch.eye(3, 4)))
def run(self):
while self.processed_steps < self.num_of_steps:
self.esti_variance_every_steps = _data_segment(self.corpus)
print('*'*80)
need_reload = False
self.corpus.invoke_train_batches_making()
variance_earlystopper = EarlyStopping(
tolerance=self.tolerance, scorers=[VarianceScorer()]
)
if len(self.replicas) < self.num_of_devices:
self.replicas.clear()
self.parallel_model()
while self.processed_steps < self.num_of_steps and not need_reload:
next_batches = self.corpus.get_train_batches(self.buffer_every_steps)
for batch in next_batches:
time_start = time.time()
self.train_step(batch) # worker training
self.update() # worker collection and sync
self.time_sum += time.time() - time_start
' estimate variance begin '
if self.processed_steps % self.esti_variance_every_steps == 0:
with torch.no_grad():
print('*' * 80)
print('Variance Estimating...')
torch.cuda.empty_cache()
variance = self.esti_variance_step()
torch.cuda.empty_cache()
# Run variance converge computer (use patience mechanism)
variance_earlystopper(variance, self.processed_steps)
# If the patience has reached the limit, upgrade the model competence level
if variance_earlystopper.has_stopped():
self.upgrade_competence()
need_reload = True
break
print('Training')
print(self.annotate)
' estimate variance end '
if self.processed_steps % self.report_every_steps == 0:
self.report()
if self.processed_steps % self.eval_every_steps == 0:
with torch.no_grad():
print('*' * 80)
print('Evaluating')
torch.cuda.empty_cache()
for model in self.replicas:
model.eval()
self.eval_step()
self.save()
torch.cuda.empty_cache()
for model in self.replicas:
model.train()
print('Training')
print(self.annotate)
if self.processed_steps >= self.num_of_steps:
print('End of train.')
return
return
def train_test(self):
# load model if model exists weigh initialization
if self.config.load_model is True:
self.load_model()
# self.load_spec_model()
else:
self.weight_init()
# loss function
if self.config.gpu_mode:
self.model.cuda()
self.MSE_loss = nn.MSELoss().cuda() # 默认算出来是对每个sample的平均
else:
self.MSE_loss = nn.MSELoss()
# optimizer
self.momentum = 0.9
self.optimizer = optim.Adam(self.model.parameters(),
lr=self.config.lr,
weight_decay=1.0)
scheduler = lr_scheduler.StepLR(self.optimizer,
step_size=100,
gamma=0.1)
# scheduler = lr_scheduler.ExponentialLR(self.optimizer, gamma=0.9)
print('---------- Networks architecture -------------')
utils.print_network(self.model)
print('----------------------------------------------')
# load dataset
train_data_loader = self.data_train
test_data_loader = self.data_test
################# Train #################
print('Training is started.')
avg_loss = []
avg_loss_test = []
avg_loss_log_test = []
# step = 0
es = EarlyStopping(patience=50)
self.model.train(
) # It just sets the training mode.model.eval() to set testing mode
for epoch in range(self.config.num_epochs):
scheduler.step()
epoch_loss = 0
for iter, (input, target,
groundtruth) in enumerate(train_data_loader):
# input data (low resolution image)
if self.config.gpu_mode:
x_ = Variable(input.cuda())
y_ = Variable(groundtruth.cuda())
else:
x_ = Variable(input)
y_ = Variable(groundtruth)
# scale是10的话，x_.shape is (batchsize, 1, 300)
# scale是100的话，x_.shape is (batchsize, 1, 30)
# update network
self.optimizer.zero_grad()
model_out = self.model(x_)
loss = torch.sqrt(self.MSE_loss(model_out, y_))
loss.backward() # 结果得到是tensor
self.optimizer.step()
epoch_loss += loss
# 注意：len(train_data_loader) 是 # train samples/batchsize，有多少个train_data_loader即需要iter多少个batch
print("Epoch: [%2d] [%4d/%4d] loss: %.8f" %
((epoch + 1), (iter + 1), len(train_data_loader), loss))
# tensorboard logging
# self.logger.scalar_summary('loss', loss, step + 1)
# step += 1
# avg. loss per epoch
# 如果除以len(train_data_loader)是平均每一个sample的loss
avg_loss.append(
(epoch_loss / len(train_data_loader)).detach().cpu().numpy())
if (epoch + 1) % self.config.save_epochs == 0:
self.save_model(epoch + 1)
# caculate test loss
with torch.no_grad():
loss_test, _ = self.test(test_data_loader)
epoch_loss_test = loss_test / len(test_data_loader)
avg_loss_test.append(float(epoch_loss_test))
#nni.report_intermediate_result(
# {"default": float(epoch_loss_test), "epoch_loss": float(avg_loss[-1])})
# if es.step(avg_loss[-1]):
# self.save_model(epoch=None)
# print('Early stop at %2d epoch' % (epoch + 1))
# break
if epoch % 10 == 0 and epoch != 0:
utils.plot_loss(self.config, [avg_loss, avg_loss_test])
#nni.report_final_result({"default": float(avg_loss_test[-1]), "epoch_loss": float(avg_loss[-1])})
# Plot avg. loss
utils.plot_loss(self.config, [avg_loss, avg_loss_test])
with torch.no_grad():
_, dtw_test = self.test(test_data_loader, True)
avg_dtw_test = dtw_test / len(test_data_loader)
print('avg_loss: ', avg_loss[-1])
print('avg_loss_log with original data: ', avg_loss_test[-1])
print('dtw with original data: ', avg_dtw_test)
print("Training and test is finished.")
# Save final trained parameters of model
self.save_model(epoch=None)
## Training the model--------------------------------------------------------------------------------
n_epochs = 150
patience = 5 #used for early stopping
# optimizer = torch.optim.Adam(model.parameters(), lr = 0.0001)
optimizer = RAdam(model.parameters(),
lr=1e-3,
betas=(0.9, 0.999),
eps=1e-8,
weight_decay=1e-5,
degenerated_to_sgd=True) #Rectified Adam
# optimizer = Lookahead(base_optimizer,1e-3 ,k = 6)
train_losses = []
val_losses = []
early_stopping = EarlyStopping(patience=patience,
verbose=True,
delta=0.005,
diff=0.05)
valid_loss_min = np.Inf
epoch_tqdm = tqdm(total=n_epochs, desc='epochs')
for epoch in range(n_epochs):
train_tqdm = tqdm(total=len(train_loader), desc='training batch')
###################
# train the model #
###################
model.train()
for batch_idx, (image, boxes, label) in enumerate(train_loader):
if train_on_gpu:
image = image.cuda()
model = model.cuda()
optimizer.zero_grad()
output = model.forward(image)
