def experiment(exp, arch, loss, double_softmax, confidence_thresh, rampup,
teacher_alpha, fix_ema, unsup_weight, cls_bal_scale,
cls_bal_scale_range, cls_balance, cls_balance_loss,
combine_batches, learning_rate, standardise_samples,
src_affine_std, src_xlat_range, src_hflip, src_intens_flip,
src_intens_scale_range, src_intens_offset_range,
src_gaussian_noise_std, tgt_affine_std, tgt_xlat_range,
tgt_hflip, tgt_intens_flip, tgt_intens_scale_range,
tgt_intens_offset_range, tgt_gaussian_noise_std, num_epochs,
batch_size, epoch_size, seed, log_file, model_file, device):
settings = locals().copy()
import os
import sys
import pickle
import cmdline_helpers
if log_file == '':
log_file = 'output_aug_log_{}.txt'.format(exp)
elif log_file == 'none':
log_file = None
if log_file is not None:
if os.path.exists(log_file):
print('Output log file {} already exists'.format(log_file))
return
use_rampup = rampup > 0
src_intens_scale_range_lower, src_intens_scale_range_upper, src_intens_offset_range_lower, src_intens_offset_range_upper = \
cmdline_helpers.intens_aug_options(src_intens_scale_range, src_intens_offset_range)
tgt_intens_scale_range_lower, tgt_intens_scale_range_upper, tgt_intens_offset_range_lower, tgt_intens_offset_range_upper = \
cmdline_helpers.intens_aug_options(tgt_intens_scale_range, tgt_intens_offset_range)
import time
import math
import numpy as np
from batchup import data_source, work_pool
import data_loaders
import standardisation
import network_architectures
import augmentation
import torch, torch.cuda
from torch import nn
from torch.nn import functional as F
import optim_weight_ema
torch_device = torch.device(device)
pool = work_pool.WorkerThreadPool(2)
n_chn = 0
if exp == 'svhn_mnist':
d_source = data_loaders.load_svhn(zero_centre=False, greyscale=True)
d_target = data_loaders.load_mnist(invert=False,
zero_centre=False,
pad32=True,
val=False)
elif exp == 'mnist_svhn':
d_source = data_loaders.load_mnist(invert=False,
zero_centre=False,
pad32=True)
d_target = data_loaders.load_svhn(zero_centre=False,
greyscale=True,
val=False)
elif exp == 'svhn_mnist_rgb':
d_source = data_loaders.load_svhn(zero_centre=False, greyscale=False)
d_target = data_loaders.load_mnist(invert=False,
zero_centre=False,
pad32=True,
val=False,
rgb=True)
elif exp == 'mnist_svhn_rgb':
d_source = data_loaders.load_mnist(invert=False,
zero_centre=False,
pad32=True,
rgb=True)
d_target = data_loaders.load_svhn(zero_centre=False,
greyscale=False,
val=False)
elif exp == 'cifar_stl':
d_source = data_loaders.load_cifar10(range_01=False)
d_target = data_loaders.load_stl(zero_centre=False, val=False)
elif exp == 'stl_cifar':
d_source = data_loaders.load_stl(zero_centre=False)
d_target = data_loaders.load_cifar10(range_01=False, val=False)
elif exp == 'mnist_usps':
d_source = data_loaders.load_mnist(zero_centre=False)
d_target = data_loaders.load_usps(zero_centre=False,
scale28=True,
val=False)
elif exp == 'usps_mnist':
d_source = data_loaders.load_usps(zero_centre=False, scale28=True)
d_target = data_loaders.load_mnist(zero_centre=False, val=False)
elif exp == 'syndigits_svhn':
d_source = data_loaders.load_syn_digits(zero_centre=False)
d_target = data_loaders.load_svhn(zero_centre=False, val=False)
elif exp == 'synsigns_gtsrb':
d_source = data_loaders.load_syn_signs(zero_centre=False)
d_target = data_loaders.load_gtsrb(zero_centre=False, val=False)
else:
print('Unknown experiment type \'{}\''.format(exp))
return
# Delete the training ground truths as we should not be using them
del d_target.train_y
if standardise_samples:
standardisation.standardise_dataset(d_source)
standardisation.standardise_dataset(d_target)
n_classes = d_source.n_classes
print('Loaded data')
if arch == '':
if exp in {'mnist_usps', 'usps_mnist'}:
arch = 'mnist-bn-32-64-256'
if exp in {'svhn_mnist', 'mnist_svhn'}:
arch = 'grey-32-64-128-gp'
if exp in {
'cifar_stl', 'stl_cifar', 'syndigits_svhn', 'svhn_mnist_rgb',
'mnist_svhn_rgb'
}:
arch = 'rgb-128-256-down-gp'
if exp in {'synsigns_gtsrb'}:
arch = 'rgb40-96-192-384-gp'
net_class, expected_shape = network_architectures.get_net_and_shape_for_architecture(
arch)
if expected_shape != d_source.train_X.shape[1:]:
print(
'Architecture {} not compatible with experiment {}; it needs samples of shape {}, '
'data has samples of shape {}'.format(arch, exp, expected_shape,
d_source.train_X.shape[1:]))
return
student_net = net_class(n_classes).to(torch_device)
teacher_net = net_class(n_classes).to(torch_device)
student_params = list(student_net.parameters())
teacher_params = list(teacher_net.parameters())
for param in teacher_params:
param.requires_grad = False
student_optimizer = torch.optim.Adam(student_params, lr=learning_rate)
if fix_ema:
teacher_optimizer = optim_weight_ema.EMAWeightOptimizer(
teacher_net, student_net, alpha=teacher_alpha)
else:
teacher_optimizer = optim_weight_ema.OldWeightEMA(teacher_net,
student_net,
alpha=teacher_alpha)
classification_criterion = nn.CrossEntropyLoss()
print('Built network')
src_aug = augmentation.ImageAugmentation(
src_hflip,
src_xlat_range,
src_affine_std,
intens_flip=src_intens_flip,
intens_scale_range_lower=src_intens_scale_range_lower,
intens_scale_range_upper=src_intens_scale_range_upper,
intens_offset_range_lower=src_intens_offset_range_lower,
intens_offset_range_upper=src_intens_offset_range_upper,
gaussian_noise_std=src_gaussian_noise_std)
tgt_aug = augmentation.ImageAugmentation(
tgt_hflip,
tgt_xlat_range,
tgt_affine_std,
intens_flip=tgt_intens_flip,
intens_scale_range_lower=tgt_intens_scale_range_lower,
intens_scale_range_upper=tgt_intens_scale_range_upper,
intens_offset_range_lower=tgt_intens_offset_range_lower,
intens_offset_range_upper=tgt_intens_offset_range_upper,
gaussian_noise_std=tgt_gaussian_noise_std)
if combine_batches:
def augment(X_sup, y_src, X_tgt):
X_src_stu, X_src_tea = src_aug.augment_pair(X_sup)
X_tgt_stu, X_tgt_tea = tgt_aug.augment_pair(X_tgt)
return X_src_stu, X_src_tea, y_src, X_tgt_stu, X_tgt_tea
else:
def augment(X_src, y_src, X_tgt):
X_src = src_aug.augment(X_src)
X_tgt_stu, X_tgt_tea = tgt_aug.augment_pair(X_tgt)
return X_src, y_src, X_tgt_stu, X_tgt_tea
rampup_weight_in_list = [0]
cls_bal_fn = network_architectures.get_cls_bal_function(cls_balance_loss)
def compute_aug_loss(stu_out, tea_out):
# Augmentation loss
if use_rampup:
unsup_mask = None
conf_mask_count = None
unsup_mask_count = None
else:
conf_tea = torch.max(tea_out, 1)[0]
unsup_mask = conf_mask = (conf_tea > confidence_thresh).float()
unsup_mask_count = conf_mask_count = conf_mask.sum()
if loss == 'bce':
aug_loss = network_architectures.robust_binary_crossentropy(
stu_out, tea_out)
else:
d_aug_loss = stu_out - tea_out
aug_loss = d_aug_loss * d_aug_loss
# Class balance scaling
if cls_bal_scale:
if use_rampup:
n_samples = float(aug_loss.shape[0])
else:
n_samples = unsup_mask.sum()
avg_pred = n_samples / float(n_classes)
bal_scale = avg_pred / torch.clamp(tea_out.sum(dim=0), min=1.0)
if cls_bal_scale_range != 0.0:
bal_scale = torch.clamp(bal_scale,
min=1.0 / cls_bal_scale_range,
max=cls_bal_scale_range)
bal_scale = bal_scale.detach()
aug_loss = aug_loss * bal_scale[None, :]
aug_loss = aug_loss.mean(dim=1)
if use_rampup:
unsup_loss = aug_loss.mean() * rampup_weight_in_list[0]
else:
unsup_loss = (aug_loss * unsup_mask).mean()
# Class balance loss
if cls_balance > 0.0:
# Compute per-sample average predicated probability
# Average over samples to get average class prediction
avg_cls_prob = stu_out.mean(dim=0)
# Compute loss
equalise_cls_loss = cls_bal_fn(avg_cls_prob,
float(1.0 / n_classes))
equalise_cls_loss = equalise_cls_loss.mean() * n_classes
if use_rampup:
equalise_cls_loss = equalise_cls_loss * rampup_weight_in_list[0]
else:
if rampup == 0:
equalise_cls_loss = equalise_cls_loss * unsup_mask.mean(
dim=0)
unsup_loss += equalise_cls_loss * cls_balance
return unsup_loss, conf_mask_count, unsup_mask_count
if combine_batches:
def f_train(X_src0, X_src1, y_src, X_tgt0, X_tgt1):
X_src0 = torch.tensor(X_src0,
dtype=torch.float,
device=torch_device)
X_src1 = torch.tensor(X_src1,
dtype=torch.float,
device=torch_device)
y_src = torch.tensor(y_src, dtype=torch.long, device=torch_device)
X_tgt0 = torch.tensor(X_tgt0,
dtype=torch.float,
device=torch_device)
X_tgt1 = torch.tensor(X_tgt1,
dtype=torch.float,
device=torch_device)
n_samples = X_src0.size()[0]
n_total = n_samples + X_tgt0.size()[0]
student_optimizer.zero_grad()
student_net.train()
teacher_net.train()
# Concatenate source and target mini-batches
X0 = torch.cat([X_src0, X_tgt0], 0)
X1 = torch.cat([X_src1, X_tgt1], 0)
student_logits_out = student_net(X0)
student_prob_out = F.softmax(student_logits_out, dim=1)
src_logits_out = student_logits_out[:n_samples]
src_prob_out = student_prob_out[:n_samples]
teacher_logits_out = teacher_net(X1)
teacher_prob_out = F.softmax(teacher_logits_out, dim=1)
# Supervised classification loss
if double_softmax:
clf_loss = classification_criterion(src_prob_out, y_src)
else:
clf_loss = classification_criterion(src_logits_out, y_src)
unsup_loss, conf_mask_count, unsup_mask_count = compute_aug_loss(
student_prob_out, teacher_prob_out)
loss_expr = clf_loss + unsup_loss * unsup_weight
loss_expr.backward()
student_optimizer.step()
teacher_optimizer.step()
outputs = [
float(clf_loss) * n_samples,
float(unsup_loss) * n_total
]
if not use_rampup:
mask_count = float(conf_mask_count) * 0.5
unsup_count = float(unsup_mask_count) * 0.5
outputs.append(mask_count)
outputs.append(unsup_count)
return tuple(outputs)
else:
def f_train(X_src, y_src, X_tgt0, X_tgt1):
X_src = torch.tensor(X_src, dtype=torch.float, device=torch_device)
y_src = torch.tensor(y_src, dtype=torch.long, device=torch_device)
X_tgt0 = torch.tensor(X_tgt0,
dtype=torch.float,
device=torch_device)
X_tgt1 = torch.tensor(X_tgt1,
dtype=torch.float,
device=torch_device)
student_optimizer.zero_grad()
student_net.train()
teacher_net.train()
src_logits_out = student_net(X_src)
student_tgt_logits_out = student_net(X_tgt0)
student_tgt_prob_out = F.softmax(student_tgt_logits_out, dim=1)
teacher_tgt_logits_out = teacher_net(X_tgt1)
teacher_tgt_prob_out = F.softmax(teacher_tgt_logits_out, dim=1)
# Supervised classification loss
if double_softmax:
clf_loss = classification_criterion(
F.softmax(src_logits_out, dim=1), y_src)
else:
clf_loss = classification_criterion(src_logits_out, y_src)
unsup_loss, conf_mask_count, unsup_mask_count = compute_aug_loss(
student_tgt_prob_out, teacher_tgt_prob_out)
loss_expr = clf_loss + unsup_loss * unsup_weight
loss_expr.backward()
student_optimizer.step()
teacher_optimizer.step()
n_samples = X_src.size()[0]
outputs = [
float(clf_loss) * n_samples,
float(unsup_loss) * n_samples
]
if not use_rampup:
mask_count = float(conf_mask_count)
unsup_count = float(unsup_mask_count)
outputs.append(mask_count)
outputs.append(unsup_count)
return tuple(outputs)
print('Compiled training function')
def f_pred_src(X_sup):
X_var = torch.tensor(X_sup, dtype=torch.float, device=torch_device)
student_net.eval()
teacher_net.eval()
return (F.softmax(student_net(X_var), dim=1).detach().cpu().numpy(),
F.softmax(teacher_net(X_var), dim=1).detach().cpu().numpy())
def f_pred_tgt(X_sup):
X_var = torch.tensor(X_sup, dtype=torch.float, device=torch_device)
student_net.eval()
teacher_net.eval()
return (F.softmax(student_net(X_var), dim=1).detach().cpu().numpy(),
F.softmax(teacher_net(X_var), dim=1).detach().cpu().numpy())
def f_eval_src(X_sup, y_sup):
y_pred_prob_stu, y_pred_prob_tea = f_pred_src(X_sup)
y_pred_stu = np.argmax(y_pred_prob_stu, axis=1)
y_pred_tea = np.argmax(y_pred_prob_tea, axis=1)
return (float(
(y_pred_stu != y_sup).sum()), float((y_pred_tea != y_sup).sum()))
def f_eval_tgt(X_sup, y_sup):
y_pred_prob_stu, y_pred_prob_tea = f_pred_tgt(X_sup)
y_pred_stu = np.argmax(y_pred_prob_stu, axis=1)
y_pred_tea = np.argmax(y_pred_prob_tea, axis=1)
return (float(
(y_pred_stu != y_sup).sum()), float((y_pred_tea != y_sup).sum()))
print('Compiled evaluation function')
# Setup output
def log(text):
print(text)
if log_file is not None:
with open(log_file, 'a') as f:
f.write(text + '\n')
f.flush()
f.close()
cmdline_helpers.ensure_containing_dir_exists(log_file)
# Report setttings
log('Settings: {}'.format(', '.join([
'{}={}'.format(key, settings[key])
for key in sorted(list(settings.keys()))
])))
# Report dataset size
log('Dataset:')
log('SOURCE Train: X.shape={}, y.shape={}'.format(d_source.train_X.shape,
d_source.train_y.shape))
log('SOURCE Test: X.shape={}, y.shape={}'.format(d_source.test_X.shape,
d_source.test_y.shape))
log('TARGET Train: X.shape={}'.format(d_target.train_X.shape))
log('TARGET Test: X.shape={}, y.shape={}'.format(d_target.test_X.shape,
d_target.test_y.shape))
print('Training...')
sup_ds = data_source.ArrayDataSource([d_source.train_X, d_source.train_y],
repeats=-1)
tgt_train_ds = data_source.ArrayDataSource([d_target.train_X], repeats=-1)
train_ds = data_source.CompositeDataSource([sup_ds,
tgt_train_ds]).map(augment)
train_ds = pool.parallel_data_source(train_ds)
if epoch_size == 'large':
n_samples = max(d_source.train_X.shape[0], d_target.train_X.shape[0])
elif epoch_size == 'small':
n_samples = min(d_source.train_X.shape[0], d_target.train_X.shape[0])
elif epoch_size == 'target':
n_samples = d_target.train_X.shape[0]
n_train_batches = n_samples // batch_size
source_test_ds = data_source.ArrayDataSource(
[d_source.test_X, d_source.test_y])
target_test_ds = data_source.ArrayDataSource(
[d_target.test_X, d_target.test_y])
if seed != 0:
shuffle_rng = np.random.RandomState(seed)
else:
shuffle_rng = np.random
train_batch_iter = train_ds.batch_iterator(batch_size=batch_size,
shuffle=shuffle_rng)
best_teacher_model_state = {
k: v.cpu().numpy()
for k, v in teacher_net.state_dict().items()
}
best_conf_mask_rate = 0.0
best_src_test_err = 1.0
for epoch in range(num_epochs):
t1 = time.time()
if use_rampup:
if epoch < rampup:
p = max(0.0, float(epoch)) / float(rampup)
p = 1.0 - p
rampup_value = math.exp(-p * p * 5.0)
else:
rampup_value = 1.0
rampup_weight_in_list[0] = rampup_value
train_res = data_source.batch_map_mean(f_train,
train_batch_iter,
n_batches=n_train_batches)
train_clf_loss = train_res[0]
if combine_batches:
unsup_loss_string = 'unsup (both) loss={:.6f}'.format(train_res[1])
else:
unsup_loss_string = 'unsup (tgt) loss={:.6f}'.format(train_res[1])
src_test_err_stu, src_test_err_tea = source_test_ds.batch_map_mean(
f_eval_src, batch_size=batch_size * 2)
tgt_test_err_stu, tgt_test_err_tea = target_test_ds.batch_map_mean(
f_eval_tgt, batch_size=batch_size * 2)
if use_rampup:
unsup_loss_string = '{}, rampup={:.3%}'.format(
unsup_loss_string, rampup_value)
if src_test_err_stu < best_src_test_err:
best_src_test_err = src_test_err_stu
best_teacher_model_state = {
k: v.cpu().numpy()
for k, v in teacher_net.state_dict().items()
}
improve = '*** '
else:
improve = ''
else:
conf_mask_rate = train_res[-2]
unsup_mask_rate = train_res[-1]
if conf_mask_rate > best_conf_mask_rate:
best_conf_mask_rate = conf_mask_rate
improve = '*** '
best_teacher_model_state = {
k: v.cpu().numpy()
for k, v in teacher_net.state_dict().items()
}
else:
improve = ''
unsup_loss_string = '{}, conf mask={:.3%}, unsup mask={:.3%}'.format(
unsup_loss_string, conf_mask_rate, unsup_mask_rate)
t2 = time.time()
log('{}Epoch {} took {:.2f}s: TRAIN clf loss={:.6f}, {}; '
'SRC TEST ERR={:.3%}, TGT TEST student err={:.3%}, TGT TEST teacher err={:.3%}'
.format(improve, epoch, t2 - t1, train_clf_loss, unsup_loss_string,
src_test_err_stu, tgt_test_err_stu, tgt_test_err_tea))
# Save network
if model_file != '':
cmdline_helpers.ensure_containing_dir_exists(model_file)
with open(model_file, 'wb') as f:
torch.save(best_teacher_model_state, f)
def experiment(exp, arch, learning_rate, standardise_samples, affine_std,
xlat_range, hflip, intens_flip, intens_scale_range,
intens_offset_range, gaussian_noise_std, num_epochs, batch_size,
seed, log_file, device):
import os
import sys
import cmdline_helpers
if log_file == '':
log_file = 'output_aug_log_{}.txt'.format(exp)
elif log_file == 'none':
log_file = None
if log_file is not None:
if os.path.exists(log_file):
print('Output log file {} already exists'.format(log_file))
return
intens_scale_range_lower, intens_scale_range_upper, intens_offset_range_lower, intens_offset_range_upper = \
cmdline_helpers.intens_aug_options(intens_scale_range, intens_offset_range)
import time
import math
import numpy as np
from batchup import data_source, work_pool
import data_loaders
import standardisation
import network_architectures
import augmentation
import torch, torch.cuda
from torch import nn
from torch.nn import functional as F
with torch.cuda.device(device):
pool = work_pool.WorkerThreadPool(2)
n_chn = 0
if exp == 'svhn_mnist':
d_source = data_loaders.load_svhn(zero_centre=False,
greyscale=True)
d_target = data_loaders.load_mnist(invert=False,
zero_centre=False,
pad32=True,
val=False)
elif exp == 'mnist_svhn':
d_source = data_loaders.load_mnist(invert=False,
zero_centre=False,
pad32=True)
d_target = data_loaders.load_svhn(zero_centre=False,
greyscale=True,
val=False)
elif exp == 'svhn_mnist_rgb':
d_source = data_loaders.load_svhn(zero_centre=False,
greyscale=False)
d_target = data_loaders.load_mnist(invert=False,
zero_centre=False,
pad32=True,
val=False,
rgb=True)
elif exp == 'mnist_svhn_rgb':
d_source = data_loaders.load_mnist(invert=False,
zero_centre=False,
pad32=True,
rgb=True)
d_target = data_loaders.load_svhn(zero_centre=False,
greyscale=False,
val=False)
elif exp == 'cifar_stl':
d_source = data_loaders.load_cifar10(range_01=False)
d_target = data_loaders.load_stl(zero_centre=False, val=False)
elif exp == 'stl_cifar':
d_source = data_loaders.load_stl(zero_centre=False)
d_target = data_loaders.load_cifar10(range_01=False, val=False)
elif exp == 'mnist_usps':
d_source = data_loaders.load_mnist(zero_centre=False)
d_target = data_loaders.load_usps(zero_centre=False,
scale28=True,
val=False)
elif exp == 'usps_mnist':
d_source = data_loaders.load_usps(zero_centre=False, scale28=True)
d_target = data_loaders.load_mnist(zero_centre=False, val=False)
elif exp == 'syndigits_svhn':
d_source = data_loaders.load_syn_digits(zero_centre=False)
d_target = data_loaders.load_svhn(zero_centre=False, val=False)
elif exp == 'svhn_syndigits':
d_source = data_loaders.load_svhn(zero_centre=False, val=False)
d_target = data_loaders.load_syn_digits(zero_centre=False)
elif exp == 'synsigns_gtsrb':
d_source = data_loaders.load_syn_signs(zero_centre=False)
d_target = data_loaders.load_gtsrb(zero_centre=False, val=False)
elif exp == 'gtsrb_synsigns':
d_source = data_loaders.load_gtsrb(zero_centre=False, val=False)
d_target = data_loaders.load_syn_signs(zero_centre=False)
else:
print('Unknown experiment type \'{}\''.format(exp))
return
# Delete the training ground truths as we should not be using them
del d_target.train_y
if standardise_samples:
standardisation.standardise_dataset(d_source)
standardisation.standardise_dataset(d_target)
n_classes = d_source.n_classes
print('Loaded data')
if arch == '':
if exp in {'mnist_usps', 'usps_mnist'}:
arch = 'mnist-bn-32-64-256'
if exp in {'svhn_mnist', 'mnist_svhn'}:
arch = 'grey-32-64-128-gp'
if exp in {
'cifar_stl', 'stl_cifar', 'syndigits_svhn',
'svhn_syndigits', 'svhn_mnist_rgb', 'mnist_svhn_rgb'
}:
arch = 'rgb-48-96-192-gp'
if exp in {'synsigns_gtsrb', 'gtsrb_synsigns'}:
arch = 'rgb40-48-96-192-384-gp'
net_class, expected_shape = network_architectures.get_net_and_shape_for_architecture(
arch)
if expected_shape != d_source.train_X.shape[1:]:
print(
'Architecture {} not compatible with experiment {}; it needs samples of shape {}, '
'data has samples of shape {}'.format(
arch, exp, expected_shape, d_source.train_X.shape[1:]))
return
net = net_class(n_classes).cuda()
params = list(net.parameters())
optimizer = torch.optim.Adam(params, lr=learning_rate)
classification_criterion = nn.CrossEntropyLoss()
print('Built network')
aug = augmentation.ImageAugmentation(
hflip,
xlat_range,
affine_std,
intens_scale_range_lower=intens_scale_range_lower,
intens_scale_range_upper=intens_scale_range_upper,
intens_offset_range_lower=intens_offset_range_lower,
intens_offset_range_upper=intens_offset_range_upper,
intens_flip=intens_flip,
gaussian_noise_std=gaussian_noise_std)
def augment(X_sup, y_sup):
X_sup = aug.augment(X_sup)
return [X_sup, y_sup]
def f_train(X_sup, y_sup):
X_sup = torch.autograd.Variable(torch.from_numpy(X_sup).cuda())
y_sup = torch.autograd.Variable(
torch.from_numpy(y_sup).long().cuda())
optimizer.zero_grad()
net.train(mode=True)
sup_logits_out = net(X_sup)
# Supervised classification loss
clf_loss = classification_criterion(sup_logits_out, y_sup)
loss_expr = clf_loss
loss_expr.backward()
optimizer.step()
n_samples = X_sup.size()[0]
return float(clf_loss.data.cpu().numpy()) * n_samples
print('Compiled training function')
def f_pred_src(X_sup):
X_var = torch.autograd.Variable(torch.from_numpy(X_sup).cuda())
net.train(mode=False)
return F.softmax(net(X_var)).data.cpu().numpy()
def f_pred_tgt(X_sup):
X_var = torch.autograd.Variable(torch.from_numpy(X_sup).cuda())
net.train(mode=False)
return F.softmax(net(X_var)).data.cpu().numpy()
def f_eval_src(X_sup, y_sup):
y_pred_prob = f_pred_src(X_sup)
y_pred = np.argmax(y_pred_prob, axis=1)
return float((y_pred != y_sup).sum())
def f_eval_tgt(X_sup, y_sup):
y_pred_prob = f_pred_tgt(X_sup)
y_pred = np.argmax(y_pred_prob, axis=1)
return float((y_pred != y_sup).sum())
print('Compiled evaluation function')
# Setup output
def log(text):
print(text)
if log_file is not None:
with open(log_file, 'a') as f:
f.write(text + '\n')
f.flush()
f.close()
cmdline_helpers.ensure_containing_dir_exists(log_file)
# Report setttings
log('sys.argv={}'.format(sys.argv))
# Report dataset size
log('Dataset:')
log('SOURCE Train: X.shape={}, y.shape={}'.format(
d_source.train_X.shape, d_source.train_y.shape))
log('SOURCE Test: X.shape={}, y.shape={}'.format(
d_source.test_X.shape, d_source.test_y.shape))
log('TARGET Train: X.shape={}'.format(d_target.train_X.shape))
log('TARGET Test: X.shape={}, y.shape={}'.format(
d_target.test_X.shape, d_target.test_y.shape))
print('Training...')
train_ds = data_source.ArrayDataSource(
[d_source.train_X, d_source.train_y]).map(augment)
source_test_ds = data_source.ArrayDataSource(
[d_source.test_X, d_source.test_y])
target_test_ds = data_source.ArrayDataSource(
[d_target.test_X, d_target.test_y])
if seed != 0:
shuffle_rng = np.random.RandomState(seed)
else:
shuffle_rng = np.random
best_src_test_err = 1.0
for epoch in range(num_epochs):
t1 = time.time()
train_res = train_ds.batch_map_mean(f_train,
batch_size=batch_size,
shuffle=shuffle_rng)
train_clf_loss = train_res[0]
src_test_err, = source_test_ds.batch_map_mean(
f_eval_src, batch_size=batch_size * 4)
tgt_test_err, = target_test_ds.batch_map_mean(
f_eval_tgt, batch_size=batch_size * 4)
t2 = time.time()
if src_test_err < best_src_test_err:
log('*** Epoch {} took {:.2f}s: TRAIN clf loss={:.6f}; '
'SRC TEST ERR={:.3%}, TGT TEST err={:.3%}'.format(
epoch, t2 - t1, train_clf_loss, src_test_err,
tgt_test_err))
best_src_test_err = src_test_err
else:
log('Epoch {} took {:.2f}s: TRAIN clf loss={:.6f}; '
'SRC TEST ERR={:.3%}, TGT TEST err={:.3%}'.format(
epoch, t2 - t1, train_clf_loss, src_test_err,
tgt_test_err))