def main():
# Command line options
args = parser.parse_args()
print("Command line options:")
for arg in vars(args):
print(arg, getattr(args, arg))
if args.debug:
pdb.set_trace()
# Check whether GPU is available and can be used
# if CUDA is found then device is set accordingly
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
# Launch a writer for the tensorboard summary writer instance
save_path = 'runs/' + strftime(
"%Y-%m-%d_%H-%M-%S",
gmtime()) + '_' + args.dataset + '_' + args.architecture
# if we are resuming a previous training, note it in the name
if args.resume:
save_path = save_path + '_resumed'
writer = SummaryWriter(save_path)
# saving the parsed args to file
log_file = os.path.join(save_path, "stdout")
log = open(log_file, "a")
for arg in vars(args):
log.write(arg + ':' + str(getattr(args, arg)) + '\n')
# Dataset loading
data_init_method = getattr(datasets, args.dataset)
dataset = data_init_method(torch.cuda.is_available(), args)
# get the number of classes from the class dictionary
num_classes = dataset.num_classes
# we set an epoch multiplier to 1 for isolated training and increase it proportional to amount of tasks in CL
epoch_multiplier = 1
# add command line options to TensorBoard
args_to_tensorboard(writer, args)
log.close()
# build the model
model = architectures.Inos_model(args.num_class, args)
# Parallel container for multi GPU use and cast to available device
model = torch.nn.DataParallel(model).to(device)
print(model)
if not args.pretrained:
# Initialize the weights of the model, by default according to He et al.
print("Initializing network with: " + args.weight_init)
WeightInitializer = WeightInit(args.weight_init)
WeightInitializer.init_model(model)
# Define optimizer and loss function (criterion)
optimizer = torch.optim.SGD(model.parameters(),
args.learning_rate,
momentum=0.9,
weight_decay=2e-4)
scheduler = torch.optim.lr_scheduler.MultiStepLR(
optimizer, milestones=[30, 60, 80, 100], gamma=0.5)
epoch = 0
best_prec = 0
best_loss = random.getrandbits(128)
# optionally resume from a checkpoint
if args.resume:
if os.path.isfile(args.resume):
print("=> loading checkpoint '{}'".format(args.resume))
checkpoint = torch.load(args.resume)
epoch = checkpoint['epoch']
best_prec = checkpoint['best_prec']
best_loss = checkpoint['best_loss']
model.load_state_dict(checkpoint['state_dict'])
# optimizer.load_state_dict(checkpoint['optimizer'])
print("=> loaded checkpoint '{}' (epoch {})".format(
args.resume, checkpoint['epoch']))
else:
print("=> no checkpoint found at '{}'".format(args.resume))
# optimize until final amount of epochs is reached. Final amount of epochs is determined through the
while epoch < (args.epochs * epoch_multiplier):
if epoch + 2 == epoch % args.epochs:
print("debug perpose")
# train
train(dataset, model, criterion, epoch, optimizer, writer, device,
args)
# evaluate on validation set
prec, loss = validate(dataset, model, criterion, epoch, writer, device,
save_path, args)
# evaluate on test set
prec_t, loss_t = test(dataset, model, criterion, epoch, writer, device,
save_path, args)
# remember best prec@1 and save checkpoint
is_best = loss < best_loss
best_loss = min(loss, best_loss)
best_prec = max(prec, best_prec)
save_checkpoint(
{
'epoch': epoch,
'arch': args.architecture,
'state_dict': model.state_dict(),
'best_prec': best_prec,
'best_loss': best_loss,
'optimizer': optimizer.state_dict()
}, is_best, save_path)
# increment epoch counters
epoch += 1
scheduler.step()
writer.close()
def main():
# Command line options
args = parser.parse_args()
print("Command line options:")
for arg in vars(args):
print(arg, getattr(args, arg))
if args.cross_dataset and not args.incremental_data:
raise ValueError(
'cross-dataset training possible only if incremental-data flag set'
)
# Check whether GPU is available and can be used
# if CUDA is found then device is set accordingly
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
# Launch a writer for the tensorboard summary writer instance
save_path = 'runs/' + strftime("%Y-%m-%d_%H-%M-%S", gmtime()) + '_' + args.dataset + '_' + args.architecture +\
'_variational_samples_' + str(args.var_samples) + '_latent_dim_' + str(args.var_latent_dim)
# add option specific naming to separate tensorboard log files later
if args.autoregression:
save_path += '_pixelcnn'
if args.incremental_data:
save_path += '_incremental'
if args.train_incremental_upper_bound:
save_path += '_upper_bound'
if args.generative_replay:
save_path += '_genreplay'
if args.openset_generative_replay:
save_path += '_opensetreplay'
if args.cross_dataset:
save_path += '_cross_dataset_' + args.dataset_order
# if we are resuming a previous training, note it in the name
if args.resume:
save_path = save_path + '_resumed'
writer = SummaryWriter(save_path)
# saving the parsed args to file
log_file = os.path.join(save_path, "stdout")
log = open(log_file, "a")
for arg in vars(args):
log.write(arg + ':' + str(getattr(args, arg)) + '\n')
# Dataset loading
data_init_method = getattr(datasets, args.dataset)
dataset = data_init_method(torch.cuda.is_available(), args)
# get the number of classes from the class dictionary
num_classes = dataset.num_classes
# we set an epoch multiplier to 1 for isolated training and increase it proportional to amount of tasks in CL
epoch_multiplier = 1
if args.incremental_data:
from lib.Datasets.incremental_dataset import get_incremental_dataset
# get the method to create the incremental dataste (inherits from the chosen data loader)
inc_dataset_init_method = get_incremental_dataset(
data_init_method, args)
# different options for class incremental vs. cross-dataset experiments
if args.cross_dataset:
# if a task order file is specified, load the task order from it
if args.load_task_order:
# check if file exists and if file ends with extension '.txt'
if os.path.isfile(args.load_task_order) and len(args.load_task_order) >= 4\
and args.load_task_order[-4:] == '.txt':
print("=> loading task order from '{}'".format(
args.load_task_order))
with open(args.load_task_order, 'rb') as fp:
task_order = pickle.load(fp)
# if no file is found default to cmd line task order
else:
# parse and split string at commas
task_order = args.dataset_order.split(',')
for i in range(len(task_order)):
# remove blank spaces in dataset names
task_order[i] = task_order[i].replace(" ", "")
# use task order as specified in command line
else:
# parse and split string at commas
task_order = args.dataset_order.split(',')
for i in range(len(task_order)):
# remove blank spaces in dataset names
task_order[i] = task_order[i].replace(" ", "")
# just for getting the number of classes in the first dataset
num_classes = 0
for i in range(args.num_base_tasks):
temp_dataset_init_method = getattr(datasets, task_order[i])
temp_dataset = temp_dataset_init_method(
torch.cuda.is_available(), args)
num_classes += temp_dataset.num_classes
del temp_dataset
# multiply epochs by number of tasks
if args.num_increment_tasks:
epoch_multiplier = ((len(task_order) - args.num_base_tasks) /
args.num_increment_tasks) + 1
else:
# this branch will get active if num_increment_tasks is set to zero. This is useful when training
# any isolated upper bound with all datasets present from the start.
epoch_multiplier = 1.0
else:
# class incremental
# if specified load task order from file
if args.load_task_order:
if os.path.isfile(args.load_task_order):
print("=> loading task order from '{}'".format(
args.load_task_order))
task_order = np.load(args.load_task_order).tolist()
else:
# if no file is found a random task order is created
print(
"=> no task order found. Creating randomized task order"
)
task_order = np.random.permutation(num_classes).tolist()
else:
# if randomize task order is specified create a random task order, else task order is sequential
task_order = []
for i in range(dataset.num_classes):
task_order.append(i)
if args.randomize_task_order:
task_order = np.random.permutation(num_classes).tolist()
# save the task order
np.save(os.path.join(save_path, 'task_order.npy'), task_order)
# set the number of classes to base tasks + 1 because base tasks is always one less.
# E.g. if you have 2 classes it's one task. This is a little inconsistent from the naming point of view
# but we wanted a single variable to work for both class incremental as well as cross-dataset experiments
num_classes = args.num_base_tasks + 1
# multiply epochs by number of tasks
epoch_multiplier = (
(len(task_order) -
(args.num_base_tasks + 1)) / args.num_increment_tasks) + 1
print("Task order: ", task_order)
# log the task order into the text file
log.write('task_order:' + str(task_order) + '\n')
args.task_order = task_order
# this is a little weird, but it needs to be here because the below method pops items from task_order
args_to_tensorboard(writer, args)
assert epoch_multiplier.is_integer(), print(
"uneven task division, make sure number of tasks are integers.")
# Get the incremental dataset
dataset = inc_dataset_init_method(torch.cuda.is_available(), device,
task_order, args)
else:
# add command line options to TensorBoard
args_to_tensorboard(writer, args)
log.close()
# Get a sample input from the data loader to infer color channels/size
net_input, _ = next(iter(dataset.train_loader))
# get the amount of color channels in the input images
num_colors = net_input.size(1)
# import model from architectures class
net_init_method = getattr(architectures, args.architecture)
# if we are not building an autoregressive model the number of output channels of the model is equivalent to
# the amount of input channels. For an autoregressive models we set the number of output channels of the
# non-autoregressive decoder portion according to the command line option below
if not args.autoregression:
args.out_channels = num_colors
# build the model
model = net_init_method(device, num_classes, num_colors, args)
# optionally add the autoregressive decoder
if args.autoregression:
model.pixelcnn = PixelCNN(device,
num_colors,
args.out_channels,
args.pixel_cnn_channels,
num_layers=args.pixel_cnn_layers,
k=args.pixel_cnn_kernel_size,
padding=args.pixel_cnn_kernel_size // 2)
# Parallel container for multi GPU use and cast to available device
model = torch.nn.DataParallel(model).to(device)
print(model)
# Initialize the weights of the model, by default according to He et al.
print("Initializing network with: " + args.weight_init)
WeightInitializer = WeightInit(args.weight_init)
WeightInitializer.init_model(model)
# Define optimizer and loss function (criterion)
optimizer = torch.optim.Adam(model.parameters(), args.learning_rate)
epoch = 0
best_prec = 0
best_loss = random.getrandbits(128)
# optionally resume from a checkpoint
if args.resume:
if os.path.isfile(args.resume):
print("=> loading checkpoint '{}'".format(args.resume))
checkpoint = torch.load(args.resume)
epoch = checkpoint['epoch']
best_prec = checkpoint['best_prec']
best_loss = checkpoint['best_loss']
model.load_state_dict(checkpoint['state_dict'])
optimizer.load_state_dict(checkpoint['optimizer'])
print("=> loaded checkpoint '{}' (epoch {})".format(
args.resume, checkpoint['epoch']))
else:
print("=> no checkpoint found at '{}'".format(args.resume))
# optimize until final amount of epochs is reached. Final amount of epochs is determined through the
while epoch < (args.epochs * epoch_multiplier):
# visualize the latent space before each task increment and at the end of training if it is 2-D
if epoch % args.epochs == 0 and epoch > 0 or (epoch + 1) % (
args.epochs * epoch_multiplier) == 0:
if model.module.latent_dim == 2:
print("Calculating and visualizing dataset embedding")
# infer the number of current tasks to plot the different classes in the embedding
if args.incremental_data:
if args.cross_dataset:
num_tasks = sum(
dataset.num_classes_per_task[:len(dataset.
seen_tasks)])
else:
num_tasks = len(dataset.seen_tasks)
else:
num_tasks = num_classes
zs = get_latent_embedding(model, dataset.train_loader,
num_tasks, device)
visualize_dataset_in_2d_embedding(writer,
zs,
args.dataset,
save_path,
task=num_tasks)
# continual learning specific part
if args.incremental_data:
# at the end of each task increment
if epoch % args.epochs == 0 and epoch > 0:
print('Saving the last checkpoint from the previous task ...')
save_task_checkpoint(save_path, epoch // args.epochs)
print("Incrementing dataset ...")
dataset.increment_tasks(
model,
args.batch_size,
args.workers,
writer,
save_path,
is_gpu=torch.cuda.is_available(),
upper_bound_baseline=args.train_incremental_upper_bound,
generative_replay=args.generative_replay,
openset_generative_replay=args.openset_generative_replay,
openset_threshold=args.openset_generative_replay_threshold,
openset_tailsize=args.openset_weibull_tailsize,
autoregression=args.autoregression)
# grow the classifier and increment the variable for number of overall classes so we can use it later
if args.cross_dataset:
grow_classifier(
model.module.classifier,
sum(dataset.num_classes_per_task[:len(dataset.
seen_tasks)]) -
model.module.num_classes, WeightInitializer)
model.module.num_classes = sum(
dataset.num_classes_per_task[:len(dataset.seen_tasks)])
else:
model.module.num_classes += args.num_increment_tasks
grow_classifier(model.module.classifier,
args.num_increment_tasks,
WeightInitializer)
# reset moving averages etc. of the optimizer
optimizer = torch.optim.Adam(model.parameters(),
args.learning_rate)
# change the number of seen classes
if epoch % args.epochs == 0:
model.module.seen_tasks = dataset.seen_tasks
# train
train(dataset, model, criterion, epoch, optimizer, writer, device,
args)
# evaluate on validation set
prec, loss = validate(dataset, model, criterion, epoch, writer, device,
save_path, args)
# remember best prec@1 and save checkpoint
is_best = loss < best_loss
best_loss = min(loss, best_loss)
best_prec = max(prec, best_prec)
save_checkpoint(
{
'epoch': epoch,
'arch': args.architecture,
'state_dict': model.state_dict(),
'best_prec': best_prec,
'best_loss': best_loss,
'optimizer': optimizer.state_dict()
}, is_best, save_path)
# increment epoch counters
epoch += 1
# if a new task begins reset the best prec so that new best model can be stored.
if args.incremental_data and epoch % args.epochs == 0:
best_prec = 0
best_loss = random.getrandbits(128)
writer.close()
def main():
# Command line options
args = parser.parse_args()
print("Command line options:")
for arg in vars(args):
print(arg, getattr(args, arg))
# import the correct loss and training functions depending which model to optimize
# TODO: these could easily be refactored into one function, but we kept it this way for modularity
if args.train_var:
if args.joint:
from lib.Training.train import train_var_joint as train
from lib.Training.validate import validate_var_joint as validate
from lib.Training.loss_functions import var_loss_function_joint as criterion
else:
from lib.Training.train import train_var as train
from lib.Training.validate import validate_var as validate
from lib.Training.loss_functions import var_loss_function as criterion
else:
if args.joint:
from lib.Training.train import train_joint as train
from lib.Training.validate import validate_joint as validate
from lib.Training.loss_functions import loss_function_joint as criterion
else:
from lib.Training.train import train as train
from lib.Training.validate import validate as validate
from lib.Training.loss_functions import loss_function as criterion
# Check whether GPU is available and can be used
# if CUDA is found then device is set accordingly
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
# Launch a writer for the tensorboard summary writer instance
save_path = 'runs/' + strftime("%Y-%m-%d_%H-%M-%S", gmtime()) + '_' + args.dataset + '_' + args.architecture +\
'_dropout_' + str(args.dropout)
if args.train_var:
save_path += '_variational_samples_' + str(
args.var_samples) + '_latent_dim_' + str(args.var_latent_dim)
if args.joint:
save_path += '_joint'
# if we are resuming a previous training, note it in the name
if args.resume:
save_path = save_path + '_resumed'
writer = SummaryWriter(save_path)
# saving the parsed args to file
log_file = os.path.join(save_path, "stdout")
log = open(log_file, "a")
for arg in vars(args):
log.write(arg + ':' + str(getattr(args, arg)) + '\n')
# Dataset loading
data_init_method = getattr(datasets, args.dataset)
dataset = data_init_method(torch.cuda.is_available(), args)
# get the number of classes from the class dictionary
num_classes = dataset.num_classes
# add command line options to TensorBoard
args_to_tensorboard(writer, args)
log.close()
# Get a sample input from the data loader to infer color channels/size
net_input, _ = next(iter(dataset.train_loader))
# get the amount of color channels in the input images
num_colors = net_input.size(1)
# import model from architectures class
net_init_method = getattr(architectures, args.architecture)
# build the model
model = net_init_method(device, num_classes, num_colors, args)
# Parallel container for multi GPU use and cast to available device
model = torch.nn.DataParallel(model).to(device)
print(model)
# Initialize the weights of the model, by default according to He et al.
print("Initializing network with: " + args.weight_init)
WeightInitializer = WeightInit(args.weight_init)
WeightInitializer.init_model(model)
# Define optimizer and loss function (criterion)
optimizer = torch.optim.Adam(model.parameters(),
lr=args.learning_rate,
weight_decay=args.weight_decay)
epoch = 0
best_prec = 0
best_loss = random.getrandbits(128)
# optionally resume from a checkpoint
if args.resume:
if os.path.isfile(args.resume):
print("=> loading checkpoint '{}'".format(args.resume))
checkpoint = torch.load(args.resume)
epoch = checkpoint['epoch']
best_prec = checkpoint['best_prec']
best_loss = checkpoint['best_loss']
model.load_state_dict(checkpoint['state_dict'])
optimizer.load_state_dict(checkpoint['optimizer'])
print("=> loaded checkpoint '{}' (epoch {})".format(
args.resume, checkpoint['epoch']))
else:
print("=> no checkpoint found at '{}'".format(args.resume))
# optimize until final amount of epochs is reached.
while epoch < args.epochs:
# train
train(dataset, model, criterion, epoch, optimizer, writer, device,
args)
# evaluate on validation set
prec, loss = validate(dataset, model, criterion, epoch, writer, device,
args)
# remember best prec@1 and save checkpoint
is_best = loss < best_loss
best_loss = min(loss, best_loss)
best_prec = max(prec, best_prec)
save_checkpoint(
{
'epoch': epoch,
'arch': args.architecture,
'state_dict': model.state_dict(),
'best_prec': best_prec,
'best_loss': best_loss,
'optimizer': optimizer.state_dict()
}, is_best, save_path)
# increment epoch counters
epoch += 1
writer.close()