def build_imageAudioNet(self, weights=''):
net = ImageAudioModel()
net.apply(weights_init)
if len(weights) > 0:
print('Loading the fc weights for imageAudio network')
checkpointer = Checkpointer(net)
checkpointer.load_model_only(weights)
return net
def build_imageAudioClassifierNet(self, net_classifier, args, weights=''):
net = ImageAudioClassifyModel(net_classifier, args)
net.apply(weights_init)
if len(weights) > 0:
print('Loading the weights for imageAudioClassifier network')
checkpointer = Checkpointer(net)
checkpointer.load_model_only(weights)
return net
def main(args):
logger = setup_logger(
"Listen_to_look, classification",
args.checkpoint_path,
True
)
logger.debug(args)
writer = None
if args.visualization:
writer = setup_tbx(
args.checkpoint_path,
True
)
if writer is not None:
logger.info("Allowed Tensorboard writer")
# create model
builder = ModelBuilder()
net_classifier = builder.build_classifierNet(512, args.num_classes).cuda()
net_imageAudio = builder.build_imageAudioNet().cuda()
net_imageAudioClassify = builder.build_imageAudioClassifierNet(net_imageAudio, net_classifier, args, weights=args.weights_audioImageModel).cuda()
model = builder.build_audioPreviewLSTM(net_imageAudio, net_classifier, args)
model = model.cuda()
# define loss function (criterion) and optimizer
criterion = {}
criterion['CrossEntropyLoss'] = nn.CrossEntropyLoss().cuda()
cudnn.benchmark = True
checkpointer = Checkpointer(model)
if args.pretrained_model is not None:
if not os.path.isfile(args.pretrained_model):
list_of_models = glob.glob(os.path.join(args.pretrained_model, "*.pth"))
args.pretrained_model = max(list_of_models, key=os.path.getctime)
logger.debug("Loading model only at: {}".format(args.pretrained_model))
checkpointer.load_model_only(f=args.pretrained_model)
model = torch.nn.parallel.DataParallel(model).cuda()
# DATA LOADING
val_ds, val_collate = create_validation_dataset(args,logger=logger)
val_loader = torch.utils.data.DataLoader(
val_ds,
batch_size=args.batch_size,
num_workers=args.decode_threads,
collate_fn=val_collate
)
avgpool_final_acc, lstm_final_acc, avgpool_mean_ap, lstm_mean_ap, loss_avg = validate(args, 117, val_loader, model, criterion, val_ds=val_ds)
print(
"Testing Summary for checkpoint: {}\n"
"Avgpool Acc: {} \n LSTM Acc: {} \n Avgpool mAP: {} \n LSTM mAP: {}".format(
args.pretrained_model, avgpool_final_acc*100,
lstm_final_acc*100, avgpool_mean_ap, lstm_mean_ap
)
)
def build_audio(self, weights=''):
pretrained = True
original_resnet = torchvision.models.resnet18(pretrained)
net = AudioNet(original_resnet)
if len(weights) > 0:
print('Loading weights for audio stream')
checkpointer = Checkpointer(net)
checkpointer.load_model_only(weights)
return net
def build_classifierNet(
self,
input_dims=512,
num_classes=200,
weights='',
):
net = ClassifierNet(input_dims, num_classes)
net.apply(weights_init)
if len(weights) > 0:
print('Loading weights for classifier')
checkpointer = Checkpointer(net)
checkpointer.load_model_only(weights)
return net
def create_checkpointer(self):
checkpoints_path = os.path.join(self.logs_path,
Config.checkpoints_folder)
os.makedirs(checkpoints_path)
self.checkpointer = Checkpointer(checkpoints_path)
logging.info(f'Checkpointer initialized at {checkpoints_path}')
def __init__(self, args):
super(Trainer, self).__init__()
self.args = args
self.vis = Visualizer(env=args.checkname)
self.saver = Checkpointer(args.checkname,
args.saver_path,
overwrite=False,
verbose=True,
timestamp=True,
max_queue=args.max_save)
self.model = LinkCrack()
# Using cuda
if args.cuda:
self.model = torch.nn.DataParallel(self.model,
device_ids=self.args.gpu_ids)
self.model = self.model.cuda()
self.device = torch.device("cuda")
else:
self.device = torch.device("cpu")
if args.pretrained_model:
self.model.load_state_dict(
self.saver.load(self.args.pretrained_model, multi_gpu=True))
self.vis.log('load checkpoint: %s' % self.args.pretrained_model,
'train info')
# Define Dataloader
kwargs = {'num_workers': args.workers, 'pin_memory': True}
self.train_loader, self.val_loader, self.test_loader, self.nclass = make_data_loader(
args, **kwargs)
if args.use_adam:
self.optimizer = torch.optim.Adam(self.model.parameters(),
lr=args.lr,
weight_decay=args.weight_decay)
else:
self.optimizer = torch.optim.SGD(self.model.parameters(),
lr=args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay)
self.iter_counter = 0
self.scheduler = LR_Scheduler(args.lr_scheduler, args.lr, args.epochs,
len(self.train_loader))
# -------------------- Loss --------------------- #
self.mask_loss = nn.BCEWithLogitsLoss(
reduction='mean',
pos_weight=torch.cuda.FloatTensor([args.pos_pixel_weight]))
self.connected_loss = nn.BCEWithLogitsLoss(
reduction='mean',
pos_weight=torch.cuda.FloatTensor([args.pos_link_weight]))
self.loss_weight = args.loss_weight
# logger
self.log_loss = {}
self.log_acc = {}
self.save_pos_acc = -1
self.save_acc = -1
class Trainer(object):
def __init__(self, args):
super(Trainer, self).__init__()
self.args = args
self.vis = Visualizer(env=args.checkname)
self.saver = Checkpointer(args.checkname,
args.saver_path,
overwrite=False,
verbose=True,
timestamp=True,
max_queue=args.max_save)
self.model = LinkCrack()
# Using cuda
if args.cuda:
self.model = torch.nn.DataParallel(self.model,
device_ids=self.args.gpu_ids)
self.model = self.model.cuda()
self.device = torch.device("cuda")
else:
self.device = torch.device("cpu")
if args.pretrained_model:
self.model.load_state_dict(
self.saver.load(self.args.pretrained_model, multi_gpu=True))
self.vis.log('load checkpoint: %s' % self.args.pretrained_model,
'train info')
# Define Dataloader
kwargs = {'num_workers': args.workers, 'pin_memory': True}
self.train_loader, self.val_loader, self.test_loader, self.nclass = make_data_loader(
args, **kwargs)
if args.use_adam:
self.optimizer = torch.optim.Adam(self.model.parameters(),
lr=args.lr,
weight_decay=args.weight_decay)
else:
self.optimizer = torch.optim.SGD(self.model.parameters(),
lr=args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay)
self.iter_counter = 0
self.scheduler = LR_Scheduler(args.lr_scheduler, args.lr, args.epochs,
len(self.train_loader))
# -------------------- Loss --------------------- #
self.mask_loss = nn.BCEWithLogitsLoss(
reduction='mean',
pos_weight=torch.cuda.FloatTensor([args.pos_pixel_weight]))
self.connected_loss = nn.BCEWithLogitsLoss(
reduction='mean',
pos_weight=torch.cuda.FloatTensor([args.pos_link_weight]))
self.loss_weight = args.loss_weight
# logger
self.log_loss = {}
self.log_acc = {}
self.save_pos_acc = -1
self.save_acc = -1
def train_op(self, input, target):
self.optimizer.zero_grad()
mask = target[0]
connected = target[1]
pred = self.model(input)
pred_mask = pred[0]
pred_connected = pred[1]
mask_loss = self.mask_loss(pred_mask.view(-1, 1), mask.view(
-1, 1)) / self.args.train_batch_size
connect_loss = self.connected_loss(pred_connected.view(
-1, 1), connected.view(-1, 1)) / self.args.train_batch_size
total_loss = mask_loss + self.loss_weight * connect_loss
total_loss.backward()
self.optimizer.step()
self.iter_counter += 1
self.log_loss = {
'mask_loss': mask_loss.item(),
'connect_loss': connect_loss.item(),
'total_loss': total_loss.item()
}
return torch.cat((pred_mask.clone(), pred_connected.clone()), 1)
def val_op(self, input, target):
mask = target[0]
connected = target[1]
pred = self.model(input)
pred_mask = pred[0]
pred_connected = pred[1]
mask_loss = self.mask_loss(pred_mask.view(-1, 1), mask.view(
-1, 1)) / self.args.val_batch_size
connect_loss = self.connected_loss(pred_connected, connected)
total_loss = mask_loss + self.loss_weight * connect_loss
self.log_loss = {
'mask_loss': mask_loss.item(),
'connect_loss': connect_loss.item(),
'total_loss': total_loss.item()
}
return torch.cat((pred_mask.clone(), pred_connected.clone()), 1)
def acc_op(self, pred, target):
mask = target[0]
connected = target[1]
pred = torch.sigmoid(pred)
pred[pred > self.args.acc_sigmoid_th] = 1
pred[pred <= self.args.acc_sigmoid_th] = 0
pred_mask = pred[:, 0, :, :].contiguous()
pred_connected = pred[:, 1:, :, :].contiguous()
mask_acc = pred_mask.eq(
mask.view_as(pred_mask)).sum().item() / mask.numel()
mask_pos_acc = pred_mask[mask > 0].eq(mask[mask > 0].view_as(
pred_mask[mask > 0])).sum().item() / mask[mask > 0].numel()
mask_neg_acc = pred_mask[mask < 1].eq(mask[mask < 1].view_as(
pred_mask[mask < 1])).sum().item() / mask[mask < 1].numel()
connected_acc = pred_connected.eq(connected.view_as(
pred_connected)).sum().item() / connected.numel()
connected_pos_acc = pred_connected[connected > 0].eq(
connected[connected > 0].view_as(pred_connected[connected > 0])
).sum().item() / connected[connected > 0].numel()
connected_neg_acc = pred_connected[connected < 1].eq(
connected[connected < 1].view_as(pred_connected[connected < 1])
).sum().item() / connected[connected < 1].numel()
self.log_acc = {
'mask_acc': mask_acc,
'mask_pos_acc': mask_pos_acc,
'mask_neg_acc': mask_neg_acc,
'connected_acc': connected_acc,
'connected_pos_acc': connected_pos_acc,
'connected_neg_acc': connected_neg_acc
}
def training(self):
try:
for epoch in range(1, self.args.epochs):
self.vis.log('Start Epoch %d ...' % epoch, 'train info')
self.model.train()
# --------------------- training ------------------- #
bar = tqdm(enumerate(self.train_loader),
total=len(self.train_loader))
bar.set_description('Epoch %d --- Training --- :' % epoch)
for idx, sample in bar:
img = sample['image']
lab = sample['label']
self.scheduler(self.optimizer, idx, epoch, self.save_acc)
data, target = img.type(torch.cuda.FloatTensor).to(
self.device), [
lab[0].type(torch.cuda.FloatTensor).to(
self.device),
lab[1].type(torch.cuda.FloatTensor).to(self.device)
]
pred = self.train_op(data, target)
if idx % self.args.vis_train_loss_every == 0:
self.vis.log(self.log_loss, 'train_loss')
self.vis.plot_many({
'train_mask_loss':
self.log_loss['mask_loss'],
'train_connect_loss':
self.log_loss['connect_loss'],
'train_total_loss':
self.log_loss['total_loss']
})
if idx % self.args.vis_train_acc_every == 0:
self.acc_op(pred, target)
self.vis.log(self.log_acc, 'train_acc')
self.vis.plot_many({
'train_mask_acc':
self.log_acc['mask_acc'],
'train_connect_acc':
self.log_acc['connected_acc'],
'train_mask_pos_acc':
self.log_acc['mask_pos_acc'],
'train_mask_neg_acc':
self.log_acc['mask_neg_acc'],
'train_connect_pos_acc':
self.log_acc['connected_pos_acc'],
'train_connect_neg_acc':
self.log_acc['connected_neg_acc']
})
if idx % self.args.vis_train_img_every == 0:
self.vis.img_many({
'train_img':
data.cpu(),
'train_pred':
pred[:, 0, :, :].unsqueeze(1).contiguous().cpu(),
'train_lab':
target[0].unsqueeze(1).cpu(),
'train_lab_channel_0':
target[1][:,
0, :, :].unsqueeze(1).contiguous().cpu(),
'train_lab_channel_1':
target[1][:,
1, :, :].unsqueeze(1).contiguous().cpu(),
'train_lab_channel_2':
target[1][:,
2, :, :].unsqueeze(1).contiguous().cpu(),
'train_lab_channel_3':
target[1][:,
3, :, :].unsqueeze(1).contiguous().cpu(),
'train_lab_channel_4':
target[1][:,
4, :, :].unsqueeze(1).contiguous().cpu(),
'train_lab_channel_5':
target[1][:,
5, :, :].unsqueeze(1).contiguous().cpu(),
'train_lab_channel_6':
target[1][:,
6, :, :].unsqueeze(1).contiguous().cpu(),
'train_lab_channel_7':
target[1][:,
7, :, :].unsqueeze(1).contiguous().cpu(),
'train_pred_channel_0':
torch.sigmoid(
pred[:,
1, :, :].unsqueeze(1).contiguous().cpu()),
'train_pred_channel_1':
torch.sigmoid(
pred[:,
2, :, :].unsqueeze(1).contiguous().cpu()),
'train_pred_channel_2':
torch.sigmoid(
pred[:,
3, :, :].unsqueeze(1).contiguous().cpu()),
'train_pred_channel_3':
torch.sigmoid(
pred[:,
4, :, :].unsqueeze(1).contiguous().cpu()),
'train_pred_channel_4':
torch.sigmoid(
pred[:,
5, :, :].unsqueeze(1).contiguous().cpu()),
'train_pred_channel_5':
torch.sigmoid(
pred[:,
6, :, :].unsqueeze(1).contiguous().cpu()),
'train_pred_channel_6':
torch.sigmoid(
pred[:,
7, :, :].unsqueeze(1).contiguous().cpu()),
'train_pred_channel_7':
torch.sigmoid(
pred[:,
8, :, :].unsqueeze(1).contiguous().cpu()),
})
if idx % self.args.val_every == 0:
self.vis.log('Start Val %d ....' % idx, 'train info')
# -------------------- val ------------------- #
self.model.eval()
val_loss = {
'mask_loss': 0,
'connect_loss': 0,
'total_loss': 0
}
val_acc = {
'mask_acc': 0,
'mask_pos_acc': 0,
'mask_neg_acc': 0,
'connected_acc': 0,
'connected_pos_acc': 0,
'connected_neg_acc': 0
}
bar.set_description('Epoch %d --- Evaluation --- :' %
epoch)
with torch.no_grad():
for idx, sample in enumerate(self.val_loader,
start=1):
img = sample['image']
lab = sample['label']
val_data, val_target = img.type(
torch.cuda.FloatTensor).to(self.device), [
lab[0].type(torch.cuda.FloatTensor).to(
self.device),
lab[1].type(torch.cuda.FloatTensor).to(
self.device)
]
val_pred = self.val_op(val_data, val_target)
self.acc_op(val_pred, val_target)
val_loss['mask_loss'] += self.log_loss[
'mask_loss']
val_loss['connect_loss'] += self.log_loss[
'connect_loss']
val_loss['total_loss'] += self.log_loss[
'total_loss']
val_acc['mask_acc'] += self.log_acc['mask_acc']
val_acc['connected_acc'] += self.log_acc[
'connected_acc']
val_acc['mask_pos_acc'] += self.log_acc[
'mask_pos_acc']
val_acc['connected_pos_acc'] += self.log_acc[
'connected_pos_acc']
val_acc['mask_neg_acc'] += self.log_acc[
'mask_neg_acc']
val_acc['connected_neg_acc'] += self.log_acc[
'connected_neg_acc']
else:
self.vis.img_many({
'val_img':
val_data.cpu(),
'val_pred':
val_pred[:,
0, :, :].contiguous().unsqueeze(
1).cpu(),
'val_lab':
val_target[0].unsqueeze(1).cpu()
})
self.vis.plot_many({
'val_mask_loss':
val_loss['mask_loss'] / idx,
'val_connect_loss':
val_loss['connect_loss'] / idx,
'val_total_loss':
val_loss['total_loss'] / idx,
})
self.vis.plot_many({
'val_mask_acc':
val_acc['mask_acc'] / idx,
'val_connect_acc':
val_acc['connected_acc'] / idx,
'val_mask_pos_acc':
val_acc['mask_pos_acc'] / idx,
'val_mask_neg_acc':
val_acc['mask_neg_acc'] / idx,
'val_connected_pos_acc':
val_acc['connected_pos_acc'] / idx,
'val_connected_neg_acc':
val_acc['connected_neg_acc'] / idx
})
bar.set_description('Epoch %d --- Training --- :' %
epoch)
# ----------------- save model ---------------- #
if self.save_pos_acc < (val_acc['mask_pos_acc'] / idx):
self.save_pos_acc = (val_acc['mask_pos_acc'] / idx)
self.save_acc = (val_acc['mask_acc'] / idx)
self.saver.save(
self.model,
tag='connected_weight(%f)_pos_acc(%0.5f)' %
(self.loss_weight,
val_acc['mask_pos_acc'] / idx))
self.vis.log(
'Save Model -connected_weight(%f)_pos_acc(%0.5f)'
% (self.loss_weight,
val_acc['mask_pos_acc'] / idx),
'train info')
if epoch % 5 == 0 and epoch != 0:
self.save_pos_acc = (val_acc['mask_pos_acc'] / idx)
self.save_acc = (val_acc['mask_acc'] / idx)
self.saver.save(
self.model,
tag=
'connected_weight(%f)_epoch(%d)_pos_acc(%0.5f)'
% (self.loss_weight, epoch,
val_acc['mask_pos_acc'] / idx))
self.vis.log(
'Save Model -connected_weight(%f)_pos_acc(%0.5f)'
% (self.loss_weight,
val_acc['mask_pos_acc'] / idx),
'train info')
# if idx % 1000 == 0:
# self.save_pos_acc = (val_acc['mask_pos_acc'] / idx)
# self.save_acc = (val_acc['mask_acc'] / idx)
# self.saver.save(self.model, tag='connected_weight(%f)_epoch(%d)_pos_acc(%0.5f)' % (
# self.loss_weight, epoch, val_acc['mask_pos_acc'] / idx))
# self.vis.log('Save Model -connected_weight(%f)_pos_acc(%0.5f)' % (
# self.loss_weight, val_acc['mask_pos_acc'] / idx), 'train info')
self.model.train()
except KeyboardInterrupt:
self.saver.save(self.model, tag='Auto_Save_Model')
print('\n Catch KeyboardInterrupt, Auto Save final model : %s' %
self.saver.show_save_pth_name)
self.vis.log(
'Catch KeyboardInterrupt, Auto Save final model : %s' %
self.saver.show_save_pth_name, 'train info')
self.vis.log('Training End!!')
try:
sys.exit(0)
except SystemExit:
os._exit(0)
args = parser.parse_args()
config.merge_from_list(args.opts)
config.freeze()
save_dir = os.path.join(config.save_dir)
mkdir(save_dir)
logger = setup_logger("inference", save_dir, 0)
logger.info("Running with config:\n{}".format(config))
device = torch.device(config.device)
num_types = len(config.boundaries) + 2
generator = Generator(BertConfig(type_vocab_size=num_types))
generator = generator.to(device)
g_checkpointer = Checkpointer(model=generator, logger=logger)
g_checkpointer.load(config.model_path, True)
dataset = COCOCaptionDataset(root=config.data_dir,
split='test',
boundaries=config.boundaries)
data_loader = make_data_loader(dataset=dataset,
collate_fn=collate_fn_infer,
batch_size=config.samples_per_gpu,
num_workers=config.num_workers,
split='test')
pred_dict = inference(generator, data_loader, device)
logger.info(f"Saving results to {save_dir}/caption_results.json")
with open(os.path.join(save_dir, 'caption_results.json'), 'w') as f:
json.dump(pred_dict, f)
params=generator.parameters(),
lr=config.solver.lr,
weight_decay=config.solver.weight_decay,
betas=config.solver.betas
)
scheduler = WarmupCosineSchedule(
optimizer=optimizer,
warmup_steps=config.scheduler.warmup_steps,
t_total=config.scheduler.max_steps
)
checkpointer = Checkpointer(
model=generator,
optimizer=optimizer,
scheduler=scheduler,
save_dir=save_dir,
save_to_disk=get_rank() == 0,
logger=logger
)
if config.model_path == '':
generator.load_weights(config.pretrained_bert)
else:
extra_checkpoint_data = checkpointer.load(config.model_path)
arguments.update(extra_checkpoint_data)
dataset = COCOCaptionDataset(
root=config.data_dir,
split='trainrestval',
boundaries=config.boundaries,
)
def main(args):
os.makedirs(args.checkpoint_path, exist_ok=True)
# Setup logging system
logger = setup_logger(
"Listen_to_look, audio_preview classification single modality",
args.checkpoint_path, True)
logger.debug(args)
# Epoch logging
epoch_log = setup_logger("Listen_to_look: results",
args.checkpoint_path,
True,
logname="epoch.log")
epoch_log.info("epoch,loss,acc,lr")
writer = None
if args.visualization:
writer = setup_tbx(args.checkpoint_path, True)
if writer is not None:
logger.info("Allowed Tensorboard writer")
# Define the model
builder = ModelBuilder()
net_classifier = builder.build_classifierNet(args.embedding_size,
args.num_classes).cuda()
net_imageAudioClassify = builder.build_imageAudioClassifierNet(
net_classifier, args).cuda()
model = builder.build_audioPreviewLSTM(net_classifier, args)
model = model.cuda()
# DATA LOADING
train_ds, train_collate = create_training_dataset(args, logger=logger)
val_ds, val_collate = create_validation_dataset(args, logger=logger)
train_loader = torch.utils.data.DataLoader(train_ds,
batch_size=args.batch_size,
shuffle=True,
num_workers=args.decode_threads,
collate_fn=train_collate)
val_loader = torch.utils.data.DataLoader(val_ds,
batch_size=args.batch_size,
num_workers=4,
collate_fn=val_collate)
args.iters_per_epoch = len(train_loader)
args.warmup_iters = args.warmup_epochs * args.iters_per_epoch
args.milestones = [args.iters_per_epoch * m for m in args.milestones]
# define loss function (criterion) and optimizer
criterion = {}
criterion['CrossEntropyLoss'] = nn.CrossEntropyLoss().cuda()
if args.freeze_imageAudioNet:
param_groups = [{
'params': model.queryfeature_mlp.parameters(),
'lr': args.lr
}, {
'params': model.prediction_fc.parameters(),
'lr': args.lr
}, {
'params': model.key_conv1x1.parameters(),
'lr': args.lr
}, {
'params': model.rnn.parameters(),
'lr': args.lr
}, {
'params': net_classifier.parameters(),
'lr': args.lr
}]
optimizer = torch.optim.SGD(param_groups,
momentum=args.momentum,
weight_decay=args.weight_decay,
nesterov=1)
else:
optimizer = torch.optim.SGD(model.parameters(),
args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay,
nesterov=1)
scheduler = torch.optim.lr_scheduler.MultiStepLR(optimizer,
args.milestones)
# make optimizer scheduler
if args.scheduler:
scheduler = default_lr_scheduler(optimizer, args.milestones,
args.warmup_iters)
cudnn.benchmark = True
# setting up the checkpointing system
write_here = True
checkpointer = Checkpointer(model,
optimizer,
save_dir=args.checkpoint_path,
save_to_disk=write_here,
scheduler=scheduler,
logger=logger)
if args.pretrained_model is not None:
logger.debug("Loading model only at: {}".format(args.pretrained_model))
checkpointer.load_model_only(f=args.pretrained_model)
if checkpointer.has_checkpoint():
# call load checkpoint
logger.debug("Loading last checkpoint")
checkpointer.load()
model = torch.nn.parallel.DataParallel(model).cuda()
logger.debug(model)
# Log all info
if writer:
writer.add_text("namespace", repr(args))
writer.add_text("model", str(model))
#
# TRAINING
#
logger.debug("Entering the training loop")
for epoch in range(args.start_epoch, args.epochs):
# train for one epoch
train_accuracy, train_loss = train_epoch(args,
epoch,
train_loader,
model,
criterion,
optimizer,
scheduler,
logger,
epoch_logger=epoch_log,
checkpointer=checkpointer,
writer=writer)
test_map, test_accuracy, test_loss, _ = validate(
args,
epoch,
val_loader,
model,
criterion,
epoch_logger=epoch_log,
writer=writer)
if writer is not None:
writer.add_scalars('training_curves/accuracies', {
'train': train_accuracy,
'val': test_accuracy
}, epoch)
writer.add_scalars('training_curves/loss', {
'train': train_loss,
'val': test_loss
}, epoch)