def train_gan(d_model, g_model, train_dataloader, d_optimizer, g_optimizer,
loss_fn, params, model_dir):
fig = display_results.create_figure()
for epoch in range(params.num_epochs):
# Run one epoch
logging.info("Epoch {}/{}".format(epoch + 1, params.num_epochs))
test_samples = train(d_model, g_model, d_optimizer, g_optimizer,
loss_fn, train_dataloader, params, epoch, fig)
utils.save_checkpoint(
{
'epoch': epoch + 1,
'state_dict': d_model.state_dict(),
'optim_dict': d_optimizer.state_dict()
},
is_best=False,
checkpoint=model_dir,
ntype='d')
utils.save_checkpoint(
{
'epoch': epoch + 1,
'state_dict': g_model.state_dict(),
'optim_dict': g_optimizer.state_dict()
},
is_best=False,
checkpoint=model_dir,
ntype='g')
if test_samples is not None:
np_test_samples = np.array(test_samples)
np_test_samples = np.around(np_test_samples * 127.5 +
127.5).astype(int)
np_test_out = (test_noise.cpu().numpy())
np_test_labels = (test_labels.view(test_labels.shape[0],
-1).cpu().numpy())
test_all_data = (np.concatenate(
(np_test_samples, np_test_out, np_test_labels),
axis=1)).tolist()
last_csv_path = os.path.join(
model_dir, "samples_epoch_{}.csv".format(epoch + 1))
utils.save_incorrect_to_csv(test_all_data, last_csv_path)
display_results.close_figure(fig)
return
def train_and_evaluate(model,
train_dataloader,
dev_dataloader,
optimizer,
loss_fn,
metrics,
incorrect,
correct_fn,
params,
model_dir,
restore_file=None):
"""Train the model and evaluate every epoch.
Args:
model: (torch.nn.Module) the neural network
train_dataloader: (DataLoader) a torch.utils.data.DataLoader object that fetches training data
dev_dataloader: (DataLoader) a torch.utils.data.DataLoader object that fetches validation data
optimizer: (torch.optim) optimizer for parameters of model
loss_fn: a function that takes batch_output and batch_labels and computes the loss for the batch
metrics: (dict) a dictionary of functions that compute a metric using the output and labels of each batch
incorrect: a function that save all samples with incorrect classification
params: (Params) hyperparameters
model_dir: (string) directory containing config, weights and log
restore_file: (string) optional- name of file to restore from (without its extension .pth.tar)
"""
# reload weights from restore_file if specified
if restore_file is not None:
restore_path = os.path.join(args.model_dir,
args.restore_file + '.pth.tar')
logging.info("Restoring parameters from {}".format(restore_path))
utils.load_checkpoint(restore_path, model, optimizer)
best_dev_acc = 0.0
if args.early_stop:
early_stopping = EarlyStopping(patience=round(0.1 * params.num_epochs),
verbose=False)
# early_stopping = EarlyStopping(patience=round(0.01 * params.num_epochs), verbose=False)
fig = display_results.create_figure()
for epoch in range(params.num_epochs):
# Run one epoch
logging.info("Epoch {}/{}".format(epoch + 1, params.num_epochs))
# compute number of batches in one epoch (one full pass over the training set)
train(model, optimizer, loss_fn, train_dataloader, metrics, params,
epoch, fig, model_dir, losses)
# Evaluate for one epoch on validation set
dev_metrics, incorrect_samples, correct_samples = evaluate(
model, loss_fn, dev_dataloader, metrics, incorrect, correct_fn,
params, epoch)
dev_loss = dev_metrics['loss']
if args.early_stop:
early_stopping(dev_loss, model)
if args.early_stop and early_stopping.early_stop:
# need_to_stop = True
print("Early stopping")
logging.info("Early stopping")
break
# grads_graph = collect_network_statistics(model)
# grads_per_epoch.append(grads_graph)
dev_acc = dev_metrics['accuracy']
is_best = dev_acc > best_dev_acc
grads_graph, _ = get_network_grads(model)
vals_graph = collect_network_statistics(model)
grads_per_epoch.append(grads_graph)
vals_per_epoch.append(vals_graph)
# Save weights
utils.save_checkpoint(
{
'epoch': epoch + 1,
'state_dict': model.state_dict(),
'optim_dict': optimizer.state_dict()
},
is_best=is_best,
checkpoint=model_dir)
# If best_eval, best_save_path
if is_best:
logging.info("- Found new best accuracy")
print("Epoch {}/{}".format(epoch + 1, params.num_epochs))
print("- Found new best accuracy")
best_dev_acc = dev_acc
print("accuracy is {:05.3f}".format(best_dev_acc))
# Save best val metrics in a json file in the model directory
best_json_path = os.path.join(model_dir,
"metrics_dev_best_weights.json")
utils.save_dict_to_json(dev_metrics, best_json_path, epoch + 1)
best_inc_csv_path = os.path.join(model_dir,
"incorrect_best_samples.csv")
utils.save_incorrect_to_csv(incorrect_samples, best_inc_csv_path)
best_c_csv_path = os.path.join(model_dir,
"correct_best_samples.csv")
utils.save_incorrect_to_csv(correct_samples, best_c_csv_path)
# Save latest val metrics in a json file in the model directory
last_json_path = os.path.join(model_dir,
"metrics_dev_last_weights.json")
utils.save_dict_to_json(dev_metrics, last_json_path, epoch + 1)
last_inc_csv_path = os.path.join(model_dir,
"incorrect_last_samples.csv")
utils.save_incorrect_to_csv(incorrect_samples, last_inc_csv_path)
last_c_csv_path = os.path.join(model_dir, "correct_last_samples.csv")
utils.save_incorrect_to_csv(correct_samples, last_c_csv_path)
# compute mean of all metrics in summary (loss, bce part, kl part)
accuracy.append(dev_acc)
# if isinstance(loss, torch.autograd.Variable):
# loss_v = loss.data.cpu().numpy()
display_results.close_figure(fig)
return
def after_transfer_train_and_evaluate(model, train_dataloader, dev_dataloader,
optimizer, loss_fn, metrics, incorrect,
correct_fn, params, model_dir,
model_out_dir, restore_file):
best_dev_acc = 0.0
fig = display_results.create_figure()
for epoch in range(params.num_epochs):
# Run one epoch
logging.info("Epoch {}/{}".format(epoch + 1, params.num_epochs))
# compute number of batches in one epoch (one full pass over the training set)
train(model,
optimizer,
loss_fn,
train_dataloader,
metrics,
params,
epoch,
fig,
model_out_dir,
losses,
grayscale=True)
# Evaluate for one epoch on validation set
dev_metrics, incorrect_samples, correct_samples = evaluate(
model, loss_fn, dev_dataloader, metrics, incorrect, correct_fn,
params, epoch)
dev_acc = dev_metrics['accuracy_two_labels']
is_best = dev_acc >= best_dev_acc
grads_graph, _ = get_network_grads(model)
vals_graph = collect_network_statistics(model)
grads_per_epoch.append(grads_graph)
vals_per_epoch.append(vals_graph)
# Save weights
utils.save_checkpoint(
{
'epoch': epoch + 1,
'state_dict': model.state_dict(),
'optim_dict': optimizer.state_dict()
},
is_best=is_best,
checkpoint=model_out_dir)
# If best_eval, best_save_path
if is_best:
logging.info("- Found new best accuracy")
print("Epoch {}/{}".format(epoch + 1, params.num_epochs))
print("- Found new best accuracy")
best_dev_acc = dev_acc
print("accuracy is {:05.3f}".format(best_dev_acc))
print("loss is {:05.3f}".format(dev_metrics['loss']))
# Save best val metrics in a json file in the model directory
best_json_path = os.path.join(model_out_dir,
"metrics_dev_best_weights.json")
utils.save_dict_to_json(dev_metrics, best_json_path, epoch + 1)
best_csv_path = os.path.join(model_out_dir,
"incorrect_best_samples.csv")
utils.save_incorrect_to_csv(incorrect_samples, best_csv_path)
# Save latest val metrics in a json file in the model directory
last_json_path = os.path.join(model_out_dir,
"metrics_dev_last_weights.json")
utils.save_dict_to_json(dev_metrics, last_json_path, epoch + 1)
last_csv_path = os.path.join(model_out_dir,
"incorrect_last_samples.csv")
utils.save_incorrect_to_csv(incorrect_samples, last_csv_path)
accuracy.append(dev_acc)
display_results.close_figure(fig)
return
def train_gan(d_model, g_model, train_dataloader, d_optimizer, g_optimizer,
r_f_loss_fn, c_loss_fn, params, model_dir):
best_dict = {'loss': np.inf, 'accuracy': 0.0, 'prediction': 1.0}
dest_min = 0
dest_max = 255
curr_min = -1
curr_max = 1
fig = display_results.create_figure()
stats_dir = os.path.join(model_dir, 'stats')
if not os.path.isdir(stats_dir):
os.mkdir(stats_dir)
for epoch in range(params.num_epochs):
# Run one epoch
logging.info("Epoch {}/{}".format(epoch + 1, params.num_epochs))
test_samples, loss_mean_sum, accuracy_sum, preds_sum, incorrect_samples = train(
d_model, d_optimizer, g_model, g_optimizer, r_f_loss_fn, c_loss_fn,
train_dataloader, params, epoch, fig)
curr_vals_dict = {
'loss': loss_mean_sum,
'accuracy': accuracy_sum,
'prediction': preds_sum
}
is_best_dict = {
'loss': (curr_vals_dict['loss'] <= best_dict['loss']),
'accuracy': (curr_vals_dict['accuracy'] >= best_dict['accuracy']),
'prediction':
(curr_vals_dict['prediction'] <= best_dict['prediction'])
}
g_grads_graph, _ = get_network_grads(g_model)
d_grads_graph, _ = get_network_grads(d_model)
g_vals_graph = collect_network_statistics(g_model)
d_vals_graph = collect_network_statistics(d_model)
grads_dict['grads_per_epoch_g'].append(g_grads_graph)
grads_dict['grads_per_epoch_d'].append(d_grads_graph)
vals_dict['vals_per_epoch_g'].append(g_vals_graph)
vals_dict['vals_per_epoch_d'].append(d_vals_graph)
for it in is_best_dict.keys():
if is_best_dict[it]:
logging.info("- Found new best {}".format(it))
print("Epoch {}/{}".format(epoch + 1, params.num_epochs))
print("- Found new best {}".format(it))
best_dict[it] = curr_vals_dict[it]
print("mean {} is {:05.3f}".format(it, best_dict[it]))
metric_dict = curr_vals_dict
# Save best val metrics in a json file in the model directory
for it in is_best_dict.keys():
if is_best_dict[it]:
best_json_path = os.path.join(
stats_dir, "metrics_dev_best_{}_weights.json".format(it))
best_csv_real_path = os.path.join(
stats_dir, "incorrect_real_best_{}_samples.csv".format(it))
best_csv_fake_path = os.path.join(
stats_dir, "incorrect_fake_best_{}_samples.csv".format(it))
utils.save_dict_to_json(best_dict, best_json_path, epoch + 1)
# utils.save_dict_to_json(metric_dict, best_json_path, epoch + 1)
utils.save_incorrect_to_csv(incorrect_samples[0],
best_csv_real_path)
utils.save_incorrect_to_csv(incorrect_samples[1],
best_csv_fake_path)
# if test_samples is not None:
# np_test_samples = np.array(test_samples)
# # convert back to range [0, 255]
# np_test_samples = \
# dest_min + (dest_max - dest_min) * (np_test_samples - curr_min) / (curr_max - curr_min)
# np_test_samples = np.around(np_test_samples).astype(int)
# np_test_out = (test_noise.cpu().numpy())
# np_test_labels = (test_labels.view(test_labels.shape[0], -1).cpu().numpy())
#
# data_path = os.path.join(model_dir, 'data')
# if not os.path.isdir(data_path):
# os.mkdir(data_path)
#
# test_all_data = (np.concatenate((np_test_samples, np_test_out, np_test_labels), axis=1)).tolist()
# last_csv_path = os.path.join(data_path, "best_samples_epoch_{}.csv".format(epoch + 1))
# utils.save_incorrect_to_csv(test_all_data, last_csv_path)
if test_samples is not None:
for it in is_best_dict.keys():
if is_best_dict[it]:
best_type = it
utils.save_checkpoint(
{
'epoch': epoch + 1,
'state_dict': d_model.state_dict(),
'optim_dict': d_optimizer.state_dict()
},
is_best=is_best_dict[it],
checkpoint=stats_dir,
ntype='d',
best_type=best_type)
utils.save_checkpoint(
{
'epoch': epoch + 1,
'state_dict': g_model.state_dict(),
'optim_dict': g_optimizer.state_dict()
},
is_best=is_best_dict[it],
checkpoint=stats_dir,
ntype='g',
best_type=best_type)
np_test_samples = np.array(test_samples)
# convert back to range [0, 255]
np_test_samples = \
dest_min + (dest_max - dest_min) * (np_test_samples - curr_min) / (curr_max - curr_min)
np_test_samples = np.around(np_test_samples).astype(int)
np_test_out = (test_noise.cpu().numpy())
np_test_labels = (test_labels.view(test_labels.shape[0],
-1).cpu().numpy())
data_path = os.path.join(model_dir, 'data')
if not os.path.isdir(data_path):
os.mkdir(data_path)
test_all_data = (np.concatenate(
(np_test_samples, np_test_out, np_test_labels),
axis=1)).tolist()
last_csv_path = os.path.join(
data_path, "samples_epoch_{}.csv".format(epoch + 1))
utils.save_incorrect_to_csv(test_all_data, last_csv_path)
display_results.close_figure(fig)
return
def train_g(g_model, train_dataloader, g_optimizer, mse_loss_fn, params, model_dir):
best_loss = np.inf
dest_min = 0
dest_max = 255
curr_min = -1
curr_max = 1
fig = display_results.create_figure()
for epoch in range(params.num_epochs):
# Run one epoch
logging.info("Epoch {}/{}".format(epoch + 1, params.num_epochs))
test_samples, real_samples, loss_mean = train(g_model, g_optimizer, mse_loss_fn, train_dataloader, params, epoch, fig)
is_best = loss_mean <= best_loss
if is_best:
logging.info("- Found new best loss")
print("Epoch {}/{}".format(epoch + 1, params.num_epochs))
print("- Found new best loss")
best_loss = loss_mean
print("mean loss is {:05.3f}".format(loss_mean))
loss_metric_dict = {'loss': loss_mean}
utils.save_checkpoint({'epoch': epoch + 1,
'state_dict': g_model.state_dict(),
'optim_dict': g_optimizer.state_dict()}, is_best=is_best, checkpoint=model_dir)
# Save best val metrics in a json file in the model directory
best_json_path = os.path.join(model_dir, "metrics_min_avg_loss_best_weights.json")
utils.save_dict_to_json(loss_metric_dict, best_json_path)
best_g_grads_graph = collect_network_statistics(g_model)
display_results.plot_graph(best_g_grads_graph, [], "Grads_Best", args.model_dir, epoch=epoch+1)
if test_samples is not None:
np_test_samples = np.array(test_samples)
np_test_samples = \
dest_min + (dest_max - dest_min) * (np_test_samples - curr_min) / (curr_max - curr_min)
np_test_samples = np.around(np_test_samples).astype(int)
np_test_out = (test_noise.cpu().numpy())
np_test_labels = (test_labels.view(test_labels.shape[0], -1).cpu().numpy())
data_path = os.path.join(model_dir, 'data')
if not os.path.isdir(data_path):
os.mkdir(data_path)
test_all_data = (np.concatenate((np_test_samples, np_test_out, np_test_labels), axis=1)).tolist()
last_csv_path = os.path.join(data_path, "best_samples_epoch_{}.csv".format(epoch + 1))
utils.save_incorrect_to_csv(test_all_data, last_csv_path)
if test_samples is not None:
utils.save_checkpoint({'epoch': epoch + 1,
'state_dict': g_model.state_dict(),
'optim_dict': g_optimizer.state_dict()}, is_best=False, checkpoint=model_dir,
ntype='g')
np_test_samples = np.array(test_samples)
np_test_samples = \
dest_min + (dest_max - dest_min) * (np_test_samples - curr_min) / (curr_max - curr_min)
np_test_samples = np.around(np_test_samples).astype(int)
np_test_out = (test_noise.cpu().numpy())
np_test_labels = (test_labels.view(test_labels.shape[0], -1).cpu().numpy())
data_path = os.path.join(model_dir, 'data')
if not os.path.isdir(data_path):
os.mkdir(data_path)
test_all_data = (np.concatenate((np_test_samples, np_test_out, np_test_labels), axis=1)).tolist()
last_csv_path = os.path.join(data_path, "samples_epoch_{}.csv".format(epoch+1))
utils.save_incorrect_to_csv(test_all_data, last_csv_path)
display_results.close_figure(fig)
return
def train_gan(d_model, g_model, train_dataloader, dev_dataloader, d_optimizer, g_optimizer, loss_fn, params, model_dir,
restore_file=None):
best_loss = np.inf
dest_min = 0
dest_max = 255
curr_min = -1
curr_max = 1
fig = display_results.create_figure()
for epoch in range(params.num_epochs):
# Run one epoch
logging.info("Epoch {}/{}".format(epoch + 1, params.num_epochs))
test_samples, loss_mean_sum = \
train(d_model, g_model, d_optimizer, g_optimizer, loss_fn, train_dataloader, params, epoch, fig)
is_best = loss_mean_sum <= best_loss
g_grads_graph, _ = get_network_grads(g_model)
d_grads_graph, _ = get_network_grads(d_model)
g_vals_graph = collect_network_statistics(g_model)
d_vals_graph = collect_network_statistics(d_model)
grads_per_epoch_g.append(g_grads_graph)
grads_per_epoch_d.append(d_grads_graph)
vals_per_epoch_g.append(g_vals_graph)
vals_per_epoch_d.append(d_vals_graph)
if is_best:
logging.info("- Found new best loss")
print("Epoch {}/{}".format(epoch + 1, params.num_epochs))
print("- Found new best loss")
best_loss = loss_mean_sum
print("mean loss is {:05.3f}".format(loss_mean_sum))
loss_metric_dict = {'loss': loss_mean_sum}
# Save best val metrics in a json file in the model directory
best_json_path = os.path.join(model_dir, "metrics_dev_best_weights.json")
utils.save_dict_to_json(loss_metric_dict, best_json_path, epoch + 1)
if test_samples is not None:
np_test_samples = np.array(test_samples)
np_test_samples = \
dest_min + (dest_max - dest_min) * (np_test_samples - curr_min) / (curr_max - curr_min)
np_test_samples = np.around(np_test_samples).astype(int)
np_test_out = (test_noise.cpu().numpy())
data_path = os.path.join(model_dir, 'data')
if not os.path.isdir(data_path):
os.mkdir(data_path)
test_all_data = (np.concatenate((np_test_samples, np_test_out), axis=1)).tolist()
last_csv_path = os.path.join(data_path, "best_samples_epoch_{}.csv".format(epoch + 1))
utils.save_incorrect_to_csv(test_all_data, last_csv_path)
if test_samples is not None:
utils.save_checkpoint({'epoch': epoch + 1,
'state_dict': d_model.state_dict(),
'optim_dict': d_optimizer.state_dict()}, is_best=is_best, checkpoint=model_dir,
ntype='d')
utils.save_checkpoint({'epoch': epoch + 1,
'state_dict': g_model.state_dict(),
'optim_dict': g_optimizer.state_dict()}, is_best=is_best, checkpoint=model_dir,
ntype='g')
np_test_samples = np.array(test_samples)
np_test_samples = \
dest_min + (dest_max - dest_min) * (np_test_samples - curr_min) / (curr_max - curr_min)
np_test_samples = np.around(np_test_samples).astype(int)
np_test_out = (test_noise.cpu().numpy())
data_path = os.path.join(model_dir, 'data')
if not os.path.isdir(data_path):
os.mkdir(data_path)
test_all_data = (np.concatenate((np_test_samples, np_test_out), axis=1)).tolist()
last_csv_path = os.path.join(data_path, "samples_epoch_{}.csv".format(epoch + 1))
utils.save_incorrect_to_csv(test_all_data, last_csv_path)
display_results.close_figure(fig)
return
def train_vae(model, train_dataloader, optimizer, loss_fn, params, model_dir):
"""Train the model and evaluate every epoch.
Args:
model: (torch.nn.Module) the neural network
train_dataloader: (DataLoader) a torch.utils.data.DataLoader object that fetches training data
optimizer: (torch.optim) optimizer for parameters of model
loss_fn: a function that takes batch_output and batch_labels and computes the loss for the batch
params: (Params) hyperparameters
model_dir: (string) directory containing config, weights and log
"""
best_loss = math.inf
fig = display_results.create_figure()
for epoch in range(params.num_epochs):
# Run one epoch
logging.info("Epoch {}/{}".format(epoch + 1, params.num_epochs))
# compute number of batches in one epoch (one full pass over the training set)
reconstructed_samples, loss_mean = train(model, optimizer, loss_fn,
train_dataloader, params,
epoch, fig)
is_best = loss_mean <= best_loss
utils.save_checkpoint(
{
'epoch': epoch + 1,
'state_dict': model.state_dict(),
'optim_dict': optimizer.state_dict()
},
is_best=is_best,
checkpoint=model_dir)
# If best_eval, best_save_path
if is_best:
logging.info("- Found new best loss")
print("Epoch {}/{}".format(epoch + 1, params.num_epochs))
print("- Found new best loss")
best_loss = loss_mean
print("mean loss is {:05.3f}".format(loss_mean))
loss_metric_dict = {'loss': loss_mean}
# utils.save_checkpoint({'epoch': epoch + 1,
# 'state_dict': model.state_dict(),
# 'optim_dict': optimizer.state_dict()}, is_best=is_best, checkpoint=model_dir)
# Save best val metrics in a json file in the model directory
best_json_path = os.path.join(
model_dir, "metrics_min_avg_loss_best_weights.json")
utils.save_dict_to_json(loss_metric_dict, best_json_path)
# best_csv_path = os.path.join(model_dir, "reconstructed_min_avg_loss_best_samples.csv")
# utils.save_incorrect_to_csv(reconstructed_samples, best_csv_path)
if reconstructed_samples is not None:
np_reconstructed_samples = np.array(reconstructed_samples)
np_reconstructed_samples = np.around(np_reconstructed_samples *
255).astype(int)
data_path = os.path.join(model_dir, 'data')
if not os.path.isdir(data_path):
os.mkdir(data_path)
last_csv_path = os.path.join(
data_path, "samples_epoch_{}.csv".format(epoch + 1))
utils.save_incorrect_to_csv(np_reconstructed_samples,
last_csv_path)
display_results.close_figure(fig)