def train(train_iter, test_iter, net, feature_params, loss, device, num_epochs,
file_name):
net = net.to(device)
print("training on ", device)
batch_count = 0
best_test_acc = 0
lr = 0.001
optimizer = Ranger([{
'params': feature_params
}, {
'params': net.fc.parameters(),
'lr': lr * 10
}],
lr=lr,
weight_decay=0.0001)
# optimizer = optim.SGD([{'params': feature_params},
# {'params': net.fc.parameters(), 'lr': lr * 10}],
# lr=lr, weight_decay=0.001)
# scheduler = torch.optim.lr_scheduler.CosineAnnealingLr(optimizer, T_max=5, eta_min=4e-08)
scheduler = torch.optim.lr_scheduler.StepLR(optimizer,
step_size=10,
gamma=0.1)
for epoch in range(1, num_epochs + 1):
train_l_sum, train_acc_sum, n, start = 0.0, 0.0, 0, time.time()
scheduler.step()
for X, y in train_iter:
X = X.to(device)
y = y.to(device)
y_hat = net(X)
l = loss(y_hat, y)
optimizer.zero_grad()
l.backward()
optimizer.step()
train_l_sum += l.cpu().item()
train_acc_sum += (y_hat.argmax(dim=1) == y).sum().cpu().item()
n += y.shape[0]
batch_count += 1
test_acc = evaluate_accuracy(test_iter, net)
print(
'epoch %d, loss %.5f, train_acc %.5f, val_acc %.5f, time %.1f sec'
% (epoch, train_l_sum / batch_count, train_acc_sum / n, test_acc,
time.time() - start))
if test_acc > best_test_acc:
print('find best! save at model/%s/best.pth' % file_name)
best_test_acc = test_acc
torch.save(net.state_dict(), './model/%s/best.pth' % file_name)
with open('./result/%s.txt' % file_name, 'a') as acc_file:
acc_file.write('Epoch: %2d, acc: %.8f\n' % (epoch, test_acc))
if epoch % 10 == 0:
torch.save(net.state_dict(),
'./model/%s/checkpoint_%d.pth' % (file_name, epoch))
def train_fold():
#get arguments
opts = get_args()
#gpu selection
os.environ["CUDA_VISIBLE_DEVICES"] = opts.gpu_id
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
#instantiate datasets
json_path = os.path.join(opts.path, 'train.json')
json = pd.read_json(json_path, lines=True)
train_ids = json.id.to_list()
json_path = os.path.join(opts.path, 'test.json')
test = pd.read_json(json_path, lines=True)
#aug_test=test
#dataloader
ls_indices = test.seq_length == 130
long_data = test[ls_indices]
ids = np.asarray(long_data.id.to_list())
long_dataset = RNADataset(long_data.sequence.to_list(),
np.zeros(len(ls_indices)), ids,
np.arange(len(ls_indices)), opts.path)
long_dataloader = DataLoader(long_dataset,
batch_size=opts.batch_size,
shuffle=True,
num_workers=opts.workers)
ss_indices = test.seq_length == 107
short_data = test[ss_indices]
ids = short_data.id.to_list()
ids = ids + train_ids
short_sequences = short_data.sequence.to_list() + json.sequence.to_list()
short_dataset = RNADataset(short_sequences, np.zeros(len(short_sequences)),
ids, np.arange(len(short_sequences)), opts.path)
short_dataloader = DataLoader(short_dataset,
batch_size=opts.batch_size,
shuffle=True,
num_workers=opts.workers)
#checkpointing
checkpoints_folder = 'pretrain_weights'
csv_file = 'pretrain.csv'.format((opts.fold))
columns = ['epoch', 'train_loss']
logger = CSVLogger(columns, csv_file)
#build model and logger
model = NucleicTransformer(opts.ntoken,
opts.nclass,
opts.ninp,
opts.nhead,
opts.nhid,
opts.nlayers,
opts.kmer_aggregation,
kmers=opts.kmers,
stride=opts.stride,
dropout=opts.dropout,
pretrain=True).to(device)
optimizer = Ranger(model.parameters(), weight_decay=opts.weight_decay)
#optimizer=torch.optim.Adam(model.parameters())
criterion = nn.CrossEntropyLoss()
#lr_schedule=lr_AIAYN(optimizer,opts.ninp,opts.warmup_steps,opts.lr_scale)
# Mixed precision initialization
opt_level = 'O1'
#model, optimizer = amp.initialize(model, optimizer, opt_level=opt_level)
model = nn.DataParallel(model)
pytorch_total_params = sum(p.numel() for p in model.parameters())
print('Total number of paramters: {}'.format(pytorch_total_params))
#training loop
cos_epoch = int(opts.epochs * 0.75)
total_steps = len(long_dataloader) + len(short_dataloader)
lr_schedule = torch.optim.lr_scheduler.CosineAnnealingLR(
optimizer, (opts.epochs - cos_epoch) * (total_steps))
for epoch in range(opts.epochs):
model.train(True)
t = time.time()
total_loss = 0
optimizer.zero_grad()
train_preds = []
ground_truths = []
step = 0
for data in short_dataloader:
#for step in range(1):
step += 1
lr = get_lr(optimizer)
src = data['data']
labels = data['labels']
bpps = data['bpp'].to(device)
if np.random.uniform() > 0.5:
masked = mutate_rna_input(src)
else:
masked = mask_rna_input(src)
src = src.to(device).long()
masked = masked.to(device).long()
#labels=labels.to(device).float()
output = model(masked, bpps)
#ew=data['ew'].to(device)
loss=(criterion(output[0].reshape(-1,4),src[:,:,0].reshape(-1))+\
criterion(output[1].reshape(-1,3),src[:,:,1].reshape(-1)-4)+\
criterion(output[2].reshape(-1,7),src[:,:,2].reshape(-1)-7))
# with amp.scale_loss(loss, optimizer) as scaled_loss:
# scaled_loss.backward()
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), 1)
optimizer.step()
optimizer.zero_grad()
total_loss += loss
if epoch > cos_epoch:
lr_schedule.step()
print(
"Epoch [{}/{}], Step [{}/{}] Loss: {:.3f} Lr:{:.6f} Time: {:.1f}"
.format(epoch + 1, opts.epochs, step + 1, total_steps,
total_loss / (step + 1), lr,
time.time() - t),
end='\r',
flush=True) #total_loss/(step+1)
for data in long_dataloader:
#for step in range(1):
step += 1
lr = get_lr(optimizer)
src = data['data']
labels = data['labels']
bpps = data['bpp'].to(device)
if np.random.uniform() > 0.5:
masked = mutate_rna_input(src)
else:
masked = mask_rna_input(src)
src = src.to(device).long()
masked = masked.to(device).long()
#labels=labels.to(device).float()
output = model(masked, bpps)
#ew=data['ew'].to(device)
loss=(criterion(output[0].reshape(-1,4),src[:,:,0].reshape(-1))+\
criterion(output[1].reshape(-1,3),src[:,:,1].reshape(-1)-4)+\
criterion(output[2].reshape(-1,7),src[:,:,2].reshape(-1)-7))
# with amp.scale_loss(loss, optimizer) as scaled_loss:
# scaled_loss.backward()
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), 1)
optimizer.step()
optimizer.zero_grad()
total_loss += loss
if epoch > cos_epoch:
lr_schedule.step()
print(
"Epoch [{}/{}], Step [{}/{}] Loss: {:.3f} Lr:{:.6f} Time: {:.1f}"
.format(epoch + 1, opts.epochs, step + 1, total_steps,
total_loss / (step + 1), lr,
time.time() - t),
end='\r',
flush=True) #total_loss/(step+1)
#break
# if epoch > cos_epoch:
# lr_schedule.step()
print('')
train_loss = total_loss / (step + 1)
torch.cuda.empty_cache()
to_log = [
epoch + 1,
train_loss,
]
logger.log(to_log)
if (epoch + 1) % opts.save_freq == 0:
save_weights(model, optimizer, epoch, checkpoints_folder)
get_best_weights_from_fold(opts.fold)
def train_discriminator_adv(dis, dis_option_encoder, state_encoder, reason_decoder, dis_optimizer, epochs, max_length = 25):
"""
Training the discriminator on real_data_samples (positive) and generated samples from generator (negative).
Samples are drawn d_steps times, and the discriminator is trained for epochs epochs.
"""
# generating a small validation set before training (using oracle and generator)
dis_optimizer = Ranger(
itertools.chain(dis_option_encoder.parameters(), dis.parameters()), lr=1e-3,
weight_decay=1e-4)
for epoch in tqdm(range(epochs)):
sys.stdout.flush()
total_loss = 0
total_acc = 0
count = 0
for train_data in train_loader_adv:
num, statement, reason, label, options = train_data
batch_size, input_size = statement.size()
state_input_lengths = [len(x) for x in statement]
falselabel = [[0,1,2] for l in label]
for i in range(len(label)): falselabel[i].remove(label[i])
choice_label = [random.choice(ls) for ls in falselabel]
input_lengths = [len(x) for x in statement]
encoder_outputs, hidden = state_encoder(statement, input_lengths)
decoder_input = torch.tensor([[word_encoder.encode("<sos>")] for i in range(batch_size)]).type(
torch.cuda.LongTensor)
encoder_outputs = encoder_outputs.permute(1, 0, 2) # -> (T*B*H)
decoder_outputs = [[] for i in range(batch_size)]
eos_idx = word_encoder.encode("<eos>")
for di in range(max_length):
output, hidden = reason_decoder(decoder_input, hidden, encoder_outputs)
topv, topi = output.topk(1)
all_end = True
for i in range(batch_size):
# print(topi.squeeze()[i].item())
if topi.squeeze()[i].item() != eos_idx:
decoder_outputs[i].append(word_encoder.decode(np.array([topi.squeeze()[i].item()])))
all_end = False
if all_end:
break
decoder_input = topi.squeeze().detach()
decoder_outputs = [" ".join(output) for output in decoder_outputs]
for i in range(batch_size):
options[choice_label[i]][i][1] = decoder_outputs[i]
option_input_lengths = [[len(x[0]) + len(x[1]) for x in option] for option in options]
option_lens = [max(len(option[0])+len(option[1])+1 for option in options[i]) for i in range(3)]
options = [[word_encoder.encode("<sep>".join([x[0],x[1]])) for x in option] for option in options]
options = [sequence.pad_sequences(option, maxlen=option_len, padding='post') for option, option_len in zip(options, option_lens) ]
options = [torch.tensor(option).type(torch.cuda.LongTensor) for option in options]
option_hiddens = []
for i in range(3):
encoder_outputs, option_hidden = dis_option_encoder(options[i], option_input_lengths[i])
option_hiddens.append(option_hidden)
dis_optimizer.zero_grad()
out = dis(batch_size, option_hiddens)
loss_fn = nn.CrossEntropyLoss()
label = torch.tensor(label).type(torch.cuda.LongTensor)
loss = loss_fn(out, label)
loss.backward()
dis_optimizer.step()
total_loss += loss.data.item()
total_acc += (out.argmax(1) == label).sum().item()
sys.stdout.flush()
count += 1
print('\n average_loss = %.4f, train_acc = %.4f' % (
total_loss / (count * BATCH_SIZE), total_acc / (count * BATCH_SIZE)))
def train_alphaBert(DS_model,
dloader,
lr=1e-4,
epoch=10,
log_interval=20,
lkahead=False):
global checkpoint_file
DS_model.to(device)
# model_optimizer = optim.Adam(DS_model.parameters(), lr=lr)
model_optimizer = Ranger(DS_model.parameters(), lr=lr)
DS_model = torch.nn.DataParallel(DS_model)
DS_model.train()
# if lkahead:
# print('using Lookahead')
# model_optimizer = lookahead_pytorch.Lookahead(model_optimizer, la_steps=5, la_alpha=0.5)
# model_optimizer = Ranger(DS_model.parameters(), lr=4e-3, alpha=0.5, k=5)
# criterion = nn.MSELoss().to(device)
# criterion = alphabert_loss_v02.Alphabert_loss(device=device)
criterion = nn.CrossEntropyLoss(ignore_index=-1).to(device)
iteration = 0
total_loss = []
for ep in range(epoch):
DS_model.train()
t0 = time.time()
# step_loss = 0
epoch_loss = 0
epoch_cases = 0
for batch_idx, sample in enumerate(dloader):
model_optimizer.zero_grad()
loss = 0
src = sample['src_token']
trg = sample['trg']
att_mask = sample['mask_padding']
origin_len = sample['origin_seq_length']
bs = len(src)
src = src.float().to(device)
trg = trg.long().to(device)
att_mask = att_mask.float().to(device)
origin_len = origin_len.to(device)
pred_prop, = DS_model(input_ids=src,
attention_mask=att_mask,
out='finehead')
trg_view = trg.view(-1).contiguous()
trg_mask0 = trg_view == 0
trg_mask1 = trg_view == 1
loss = criterion(pred_prop, trg_view)
# try:
# loss0 = criterion(pred_prop[trg_mask0],trg_view[trg_mask0])
# loss1 = criterion(pred_prop[trg_mask1],trg_view[trg_mask1])
#
# loss += 0.2*loss0+0.8*loss1
# except:
# loss = criterion(pred_prop,trg.view(-1).contiguous())
loss.backward()
model_optimizer.step()
with torch.no_grad():
epoch_loss += loss.item() * bs
epoch_cases += bs
if iteration % log_interval == 0:
# step_loss.backward()
# model_optimizer.step()
# print('+++ update +++')
print(
'Ep:{} [{} ({:.0f}%)/ ep_time:{:.0f}min] L:{:.4f}'.format(
ep, batch_idx * batch_size,
100. * batch_idx / len(dloader), (time.time() - t0) *
len(dloader) / (60 * (batch_idx + 1)), loss.item()))
# print(0,st_target)
# step_loss = 0
if iteration % 400 == 0:
save_checkpoint(checkpoint_file,
'd2s_total.pth',
DS_model,
model_optimizer,
parallel=parallel)
print(
tokenize_alphabets.convert_idx2str(src[0][:origin_len[0]]))
iteration += 1
if ep % 1 == 0:
save_checkpoint(checkpoint_file,
'd2s_total.pth',
DS_model,
model_optimizer,
parallel=parallel)
# test_alphaBert(DS_model,D2S_valloader,
# is_clean_up=True, ep=ep,train=True)
print('======= epoch:%i ========' % ep)
# print('total loss: {:.4f}'.format(total_loss/len(dloader)))
print('++ Ep Time: {:.1f} Secs ++'.format(time.time() - t0))
# total_loss.append(epoch_loss)
total_loss.append(float(epoch_loss / epoch_cases))
pd_total_loss = pd.DataFrame(total_loss)
pd_total_loss.to_csv('./iou_pic/total_loss_finetune.csv', sep=',')
print(total_loss)
def train(args):
# get configs
epochs = args.epoch
dim = args.dim
lr = args.lr
weight_decay = args.l2
head_num = args.head_num
device = args.device
act = args.act
fusion = args.fusion
beta = args.beta
alpha = args.alpha
use_self = args.use_self
agg = args.agg
model = DATE(leaf_num,importer_size,item_size,\
dim,head_num,\
fusion_type=fusion,act=act,device=device,\
use_self=use_self,agg_type=agg,
).to(device)
model = nn.DataParallel(model,device_ids=[0,1])
# initialize parameters
for p in model.parameters():
if p.dim() > 1:
nn.init.xavier_uniform_(p)
# optimizer & loss
optimizer = Ranger(model.parameters(), weight_decay=weight_decay,lr=lr)
cls_loss_func = nn.BCELoss()
reg_loss_func = nn.MSELoss()
# save best model
global_best_score = 0
model_state = None
# early stop settings
stop_rounds = 3
no_improvement = 0
current_score = None
for epoch in range(epochs):
for step, (batch_feature,batch_user,batch_item,batch_cls,batch_reg) in enumerate(train_loader):
model.train() # prep to train model
batch_feature,batch_user,batch_item,batch_cls,batch_reg = \
batch_feature.to(device), batch_user.to(device), batch_item.to(device),\
batch_cls.to(device), batch_reg.to(device)
batch_cls,batch_reg = batch_cls.view(-1,1), batch_reg.view(-1,1)
# model output
classification_output, regression_output, hidden_vector = model(batch_feature,batch_user,batch_item)
# FGSM attack
adv_vector = fgsm_attack(model,cls_loss_func,hidden_vector,batch_cls,0.01)
adv_output = model.module.pred_from_hidden(adv_vector)
# calculate loss
adv_loss_func = nn.BCELoss(weight=batch_cls)
adv_loss = beta * adv_loss_func(adv_output,batch_cls)
cls_loss = cls_loss_func(classification_output,batch_cls)
revenue_loss = alpha * reg_loss_func(regression_output, batch_reg)
loss = cls_loss + revenue_loss + adv_loss
optimizer.zero_grad()
loss.backward()
optimizer.step()
if (step+1) % 1000 ==0:
print("CLS loss:%.4f, REG loss:%.4f, ADV loss:%.4f, Loss:%.4f"\
%(cls_loss.item(),revenue_loss.item(),adv_loss.item(),loss.item()))
# evaluate
model.eval()
print("Validate at epoch %s"%(epoch+1))
y_prob, val_loss = model.module.eval_on_batch(valid_loader)
y_pred_tensor = torch.tensor(y_prob).float().to(device)
best_threshold, val_score, roc = torch_threshold(y_prob,xgb_validy)
overall_f1, auc, precisions, recalls, f1s, revenues = metrics(y_prob,xgb_validy,revenue_valid)
select_best = np.mean(f1s)
print("Over-all F1:%.4f, AUC:%.4f, F1-top:%.4f" % (overall_f1, auc, select_best) )
print("Evaluate at epoch %s"%(epoch+1))
y_prob, val_loss = model.module.eval_on_batch(test_loader)
y_pred_tensor = torch.tensor(y_prob).float().to(device)
overall_f1, auc, precisions, recalls, f1s, revenues = metrics(y_prob,xgb_testy,revenue_test,best_thresh=best_threshold)
print("Over-all F1:%.4f, AUC:%.4f, F1-top:%.4f" %(overall_f1, auc, np.mean(f1s)) )
# save best model
if select_best > global_best_score:
global_best_score = select_best
torch.save(model,model_path)
# early stopping
if current_score == None:
current_score = select_best
continue
if select_best < current_score:
current_score = select_best
no_improvement += 1
if no_improvement >= stop_rounds:
print("Early stopping...")
break
if select_best > current_score:
no_improvement = 0
current_score = None
def train(train_data, val_data, fold_idx=None):
train_data = MyDataset(train_data, train_transform)
train_loader = DataLoader(train_data, batch_size=config.batch_size, shuffle=True)
val_data = MyDataset(val_data, val_transform)
val_loader = DataLoader(val_data, batch_size=config.batch_size, shuffle=False)
model = Net(model_name).to(device)
# criterion = nn.CrossEntropyLoss()
criterion = FocalLoss(0.5)
# optimizer = torch.optim.Adam(model.parameters(), lr=1e-3)
# scheduler = optim.lr_scheduler.ExponentialLR(optimizer, gamma=0.1)
optimizer = Ranger(model.parameters(), lr=1e-3, weight_decay=0.0005)
# scheduler = optim.lr_scheduler.StepLR(optimizer, step_size=5, gamma=0.1)
scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(optimizer, T_max=4)
if fold_idx is None:
print('start')
model_save_path = os.path.join(config.model_path, '{}.bin'.format(model_name))
else:
print('start fold: {}'.format(fold_idx + 1))
model_save_path = os.path.join(config.model_path, '{}_fold{}.bin'.format(model_name, fold_idx))
# if os.path.isfile(model_save_path):
# print('加载之前的训练模型')
# model.load_state_dict(torch.load(model_save_path))
best_val_score = 0
best_val_score_cnt = 0
last_improved_epoch = 0
adjust_lr_num = 0
for cur_epoch in range(config.epochs_num):
start_time = int(time.time())
model.train()
print('epoch:{}, step:{}'.format(cur_epoch + 1, len(train_loader)))
cur_step = 0
for batch_x, batch_y in train_loader:
batch_x, batch_y = batch_x.to(device), batch_y.to(device)
optimizer.zero_grad()
probs = model(batch_x)
train_loss = criterion(probs, batch_y)
train_loss.backward()
optimizer.step()
cur_step += 1
if cur_step % config.train_print_step == 0:
train_acc = accuracy(probs, batch_y)
msg = 'the current step: {0}/{1}, train loss: {2:>5.2}, train acc: {3:>6.2%}'
print(msg.format(cur_step, len(train_loader), train_loss.item(), train_acc[0].item()))
val_loss, val_score = evaluate(model, val_loader, criterion)
if val_score >= best_val_score:
if val_score == best_val_score:
best_val_score_cnt += 1
best_val_score = val_score
torch.save(model.state_dict(), model_save_path)
improved_str = '*'
last_improved_epoch = cur_epoch
else:
improved_str = ''
msg = 'the current epoch: {0}/{1}, val loss: {2:>5.2}, val acc: {3:>6.2%}, cost: {4}s {5}'
end_time = int(time.time())
print(msg.format(cur_epoch + 1, config.epochs_num, val_loss, val_score,
end_time - start_time, improved_str))
if cur_epoch - last_improved_epoch >= config.patience_epoch or best_val_score_cnt >= 3:
if adjust_lr_num >= config.adjust_lr_num:
print("No optimization for a long time, auto stopping...")
break
print("No optimization for a long time, adjust lr...")
# scheduler.step()
last_improved_epoch = cur_epoch # 加上，不然会连续更新的
adjust_lr_num += 1
best_val_score_cnt = 0
scheduler.step()
del model
gc.collect()
if fold_idx is not None:
model_score[fold_idx] = best_val_score
def train(train_data, val_data, fold_idx=None):
train_dataset = MyDataset(train_data, tokenizer)
val_dataset = MyDataset(val_data, tokenizer)
train_loader = DataLoader(train_dataset, batch_size=config.batch_size)
val_loader = DataLoader(val_dataset, batch_size=config.batch_size)
model = Model().to(config.device)
# optimizer = torch.optim.Adam(model.parameters(), lr=model_config.learning_rate)
# scheduler = torch.optim.lr_scheduler.ExponentialLR(optimizer, gamma=0.1)
optimizer = Ranger(model.parameters(), lr=5e-5)
period = int(len(train_loader) / config.train_print_step)
scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(optimizer,
T_max=period,
eta_min=5e-9)
# scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(optimizer, T_max=config.train_print_step, eta_min=1e-9)
if fold_idx is None:
print('start')
model_save_path = os.path.join(config.model_path,
'{}.bin'.format(model_name))
else:
print('start fold: {}'.format(fold_idx + 1))
model_save_path = os.path.join(
config.model_path, '{}_fold{}.bin'.format(model_name, fold_idx))
best_val_score = 0
last_improved_epoch = 0
adjust_lr_num = 0
y_true_list = []
y_pred_list = []
for cur_epoch in range(config.epochs_num):
start_time = int(time.time())
model.train()
print('epoch:{}, step:{}'.format(cur_epoch + 1, len(train_loader)))
cur_step = 0
# for batch_x, batch_y in train_loader:
for inputs in train_loader:
tweet = inputs["tweet"]
selected_text = inputs["selected_text"]
sentiment = inputs["sentiment"]
ids = inputs["ids"]
attention_mask = inputs["attention_mask"]
token_type_ids = inputs["token_type_ids"]
targets_start_idx = inputs["start_idx"]
targets_end_idx = inputs["end_idx"]
offsets = inputs["offsets"]
# Move ids, masks, and targets to gpu while setting as torch.long
ids = ids.to(config.device, dtype=torch.long)
token_type_ids = token_type_ids.to(config.device, dtype=torch.long)
attention_mask = attention_mask.to(config.device, dtype=torch.long)
targets_start_idx = targets_start_idx.to(config.device,
dtype=torch.long)
targets_end_idx = targets_end_idx.to(config.device,
dtype=torch.long)
optimizer.zero_grad()
start_logits, end_logits = model(
input_ids=ids,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
)
loss = loss_fn(start_logits, end_logits, targets_start_idx,
targets_end_idx)
loss.backward()
optimizer.step()
cur_step += 1
# pred_start_idxs = torch.argmax(start_logits, dim=1).cpu().data.numpy()
# pred_end_idxs = torch.argmax(end_logits, dim=1).cpu().data.numpy()
# for i in range(len(tweet)):
# y_true_list.append((tweet[i], selected_text[i], sentiment[i], offsets[i]))
# y_pred_list.append((pred_start_idxs[i], pred_end_idxs[i]))
if cur_step % config.train_print_step == 0:
scheduler.step()
msg = 'the current step: {0}/{1}, cost: {2}s'
print(
msg.format(cur_step, len(train_loader),
int(time.time()) - start_time))
# train_score = get_score(y_true_list, y_pred_list)
# msg = 'the current step: {0}/{1}, train score: {2:>6.2%}'
# print(msg.format(cur_step, len(train_loader), train_score))
# y_true_list = []
# y_pred_list = []
val_loss, val_score = evaluate(model, val_loader)
if val_score >= best_val_score:
best_val_score = val_score
torch.save(model.state_dict(), model_save_path)
improved_str = '*'
last_improved_epoch = cur_epoch
else:
improved_str = ''
msg = 'the current epoch: {0}/{1}, val loss: {2:>5.2}, val acc: {3:>6.2%}, cost: {4}s {5}'
end_time = int(time.time())
print(
msg.format(cur_epoch + 1, config.epochs_num, val_loss, val_score,
end_time - start_time, improved_str))
if cur_epoch - last_improved_epoch >= config.patience_epoch:
if adjust_lr_num >= model_config.adjust_lr_num:
print("No optimization for a long time, auto stopping...")
break
print("No optimization for a long time, adjust lr...")
last_improved_epoch = cur_epoch # 加上，不然会连续更新的
adjust_lr_num += 1
del model
gc.collect()
if fold_idx is not None:
model_score[fold_idx] = best_val_score
def main(args):
# img = plt.imread(train_img_list[0])
# plt.imshow(img)
'''create directory to save trained model and other info'''
if not os.path.exists(args.save_dir):
os.makedirs(args.save_dir)
# device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
''' setup GPU '''
# torch.cuda.set_device(args.gpu)
''' setup random seed '''
np.random.seed(args.random_seed)
torch.manual_seed(args.random_seed)
torch.cuda.manual_seed(args.random_seed)
device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
iters = 0
best_acc = 0
best_recall = 0
train_loss = []
total_wrecall = [0]
total_acc = [0]
''' load dataset and prepare data loader '''
print('===> loading data')
train_set = MyDataset(r'E:\ACV\MangoClassify', 'C1-P1_Train', 'train.csv',
'train')
test_set = MyDataset(r'E:\ACV\MangoClassify', 'C1-P1_Dev', 'dev.csv',
'test')
# print(train_set[0])
train_loss = []
print('===> build dataloader ...')
train_loader = torch.utils.data.DataLoader(dataset=train_set,
batch_size=args.train_batch,
num_workers=args.workers,
shuffle=False)
test_loader = torch.utils.data.DataLoader(dataset=test_set,
batch_size=args.test_batch,
num_workers=args.workers,
shuffle=False)
''' load model '''
print('===> prepare model ...')
model = CNN().to(device)
''' define loss '''
criterion = nn.CrossEntropyLoss()
''' setup optimizer '''
# optimizer = torch.optim.Adam(model.parameters(), lr=args.lr, weight_decay=args.weight_decay)
optimizer = Ranger(model.parameters(), lr=args.lr)
''' train model '''
print('===> start training ...')
for epoch in range(1, args.epoch + 1):
# model.train()
for idx, (imgs, label) in enumerate(train_loader):
# print(imgs, label)
train_info = 'Epoch: [{0}][{1}/{2}]'.format(
epoch, idx + 1, len(train_loader))
iters += 1
''' move data to gpu '''
# print('===> load data to gpu')
imgs = imgs.permute(0, 3, 1, 2).to(device, dtype=torch.float)
label = label.to(device)
''' forward path '''
pred = model(imgs)
''' compute loss, backpropagation, update parameters '''
# print('===> calculate loss')
loss = criterion(pred, label) # compute loss
train_loss += [loss.item()]
torch.cuda.empty_cache()
optimizer.zero_grad() # set grad of all parameters to zero
loss.backward() # compute gradient for each parameters
optimizer.step() # update parameters
train_info += ' loss: {:.8f}'.format(loss.item())
print(train_info) #, end="\r")
if epoch % args.val_epoch == 0:
''' evaluate the model '''
test_info = 'Epoch: [{}] '.format(epoch)
model.eval()
correct = 0
total = 0
tp_A = 0
tp_B = 0
tp_C = 0
fn_A = 0
fn_B = 0
fn_C = 0
# loss = 0
for idx, (imgs, label) in enumerate(test_loader):
imgs = imgs.permute(0, 3, 1, 2).to(device, dtype=torch.float)
# gt = gt.to(device)
pred = model(imgs)
# torch.cuda.empty_cache()
# loss += criterion(output, gt).item()
a, b, c, d, e, f, g, h, i = confusion_matrix(
label.detach().numpy(),
pred.argmax(-1).cpu().detach().numpy()).ravel()
tp_A += a
fn_A += (a + b + c)
tp_B += e
fn_B += (e + d + f)
tp_C += i
fn_C += (i + g + h)
correct += (a + e + i)
total += len(label)
acc = correct / total
w_recall = ((tp_A / fn_A) + (tp_B / fn_B) + (tp_B / fn_B)) / 3
total_wrecall += [w_recall]
total_acc += [acc]
test_info += 'Acc:{:.8f} '.format(acc)
test_info += 'Recall:{:.8f} '.format(w_recall)
print(test_info)
# print(tn, fp, fn, tp)
''' save best model '''
if w_recall > best_recall:
best_recall = w_recall
save_model(model,
os.path.join(args.save_dir, 'model_best_recall.h5'))
if acc > best_acc:
best_acc = acc
save_model(model,
os.path.join(args.save_dir, 'model_best_acc.h5'))
''' save model '''
save_model(
model,
os.path.join(
args.save_dir, 'model_{}_acc={:8f}_recall={:8f}.h5'.format(
epoch, acc, w_recall)))
plt.figure()
plt.plot(range(1, len(train_loss) + 1), train_loss, '-')
plt.xlabel("iteration")
plt.ylabel("loss")
plt.title("training loss")
plt.show()
plt.figure()
plt.plot(range(1, len(total_acc) + 1), total_acc, '-')
plt.xlabel("Epoch")
plt.ylabel("Accuracy")
plt.title("Best Accuracy:" + str(best_acc))
plt.show()
plt.figure()
plt.plot(range(1, len(total_wrecall) + 1), total_wrecall, '-')
plt.xlabel("Epoch")
plt.ylabel("Recall")
plt.title("Best Recall:" + str(best_recall))
plt.show()
def train_model(dataset=dataset,
save_dir=save_dir,
num_classes=num_classes,
lr=lr,
num_epochs=nEpochs,
save_epoch=snapshot,
useTest=useTest,
test_interval=nTestInterval):
"""
Args:
num_classes (int): Number of classes in the data
num_epochs (int, optional): Number of epochs to train for.
"""
file = open('run/log.txt', 'w')
if modelName == 'C3D':
model = C3D(num_class=num_classes)
model.my_load_pretrained_weights('saved_model/c3d.pickle')
train_params = model.parameters()
# train_params = [{'params': get_1x_lr_params(model), 'lr': lr},
# {'params': get_10x_lr_params(model), 'lr': lr * 10}]
# elif modelName == 'R2Plus1D':
# model = R2Plus1D_model.R2Plus1DClassifier(num_classes=num_classes, layer_sizes=(2, 2, 2, 2))
# train_params = [{'params': R2Plus1D_model.get_1x_lr_params(model), 'lr': lr},
# {'params': R2Plus1D_model.get_10x_lr_params(model), 'lr': lr * 10}]
# elif modelName == 'R3D':
# model = R3D_model.R3DClassifier(num_classes=num_classes, layer_sizes=(2, 2, 2, 2))
# train_params = model.parameters()
elif modelName == 'Res3D':
# model = Resnet(num_classes=num_classes, block=resblock, layers=[3, 4, 6, 3])
# train_params=model.parameters()
model = generate_model(50)
model = load_pretrained_model(model,
'./saved_model/r3d50_K_200ep.pth',
n_finetune_classes=num_classes)
train_params = model.parameters()
else:
print('We only implemented C3D and R2Plus1D models.')
raise NotImplementedError
criterion = nn.CrossEntropyLoss(
) # standard crossentropy loss for classification
# optimizer = torch.optim.Adam(train_params, lr=lr, betas=(0.9, 0.999), weight_decay=1e-5,
# amsgrad=True)
optimizer = Ranger(train_params,
lr=lr,
betas=(.95, 0.999),
weight_decay=5e-4)
print('use ranger')
scheduler = CosineAnnealingLR(optimizer,
T_max=32,
eta_min=0,
last_epoch=-1)
# optimizer = optim.SGD(train_params, lr=lr, momentum=0.9, weight_decay=5e-4)
# scheduler = optim.lr_scheduler.StepLR(optimizer, step_size=10,
# gamma=0.1) # the scheduler divides the lr by 10 every 10 epochs
if resume_epoch == 0:
print("Training {} from scratch...".format(modelName))
else:
checkpoint = torch.load(os.path.join(
save_dir, 'models',
saveName + '_epoch-' + str(resume_epoch - 1) + '.pth.tar'),
map_location=lambda storage, loc: storage
) # Load all tensors onto the CPU
print("Initializing weights from: {}...".format(
os.path.join(
save_dir, 'models',
saveName + '_epoch-' + str(resume_epoch - 1) + '.pth.tar')))
model.load_state_dict(checkpoint['state_dict'])
optimizer.load_state_dict(checkpoint['opt_dict'])
print('Total params: %.2fM' %
(sum(p.numel() for p in model.parameters()) / 1000000.0))
# model.to(device)
if torch.cuda.is_available():
model = model.cuda()
torch.backends.cudnn.enabled = True
torch.backends.cudnn.benchmark = True
model = nn.DataParallel(model)
criterion.cuda()
# log_dir = os.path.join(save_dir, 'models', datetime.now().strftime('%b%d_%H-%M-%S') + '_' + socket.gethostname())
log_dir = os.path.join(save_dir)
writer = SummaryWriter(log_dir=log_dir)
print('Training model on {} dataset...'.format(dataset))
train_dataloader = DataLoader(VideoDataset(dataset=dataset,
split='train',
clip_len=16),
batch_size=8,
shuffle=True,
num_workers=8)
val_dataloader = DataLoader(VideoDataset(dataset=dataset,
split='validation',
clip_len=16),
batch_size=8,
num_workers=8)
test_dataloader = DataLoader(VideoDataset(dataset=dataset,
split='test',
clip_len=16),
batch_size=8,
num_workers=8)
trainval_loaders = {'train': train_dataloader, 'val': val_dataloader}
trainval_sizes = {
x: len(trainval_loaders[x].dataset)
for x in ['train', 'val']
}
test_size = len(test_dataloader.dataset)
# my_smooth={'0': 0.88, '1': 0.95, '2': 0.96, '3': 0.79, '4': 0.65, '5': 0.89, '6': 0.88}
for epoch in range(resume_epoch, num_epochs):
# each epoch has a training and validation step
for phase in ['train', 'val']:
start_time = timeit.default_timer()
# reset the running loss and corrects
running_loss = 0.0
running_corrects = 0.0
# set model to train() or eval() mode depending on whether it is trained
# or being validated. Primarily affects layers such as BatchNorm or Dropout.
if phase == 'train':
# scheduler.step() is to be called once every epoch during training
# scheduler.step()
model.train()
else:
model.eval()
for inputs, labels in tqdm(trainval_loaders[phase]):
# move inputs and labels to the device the training is taking place on
inputs = Variable(inputs, requires_grad=True).to(device)
labels = Variable(labels).to(device)
# inputs = inputs.cuda(non_blocking=True)
# labels = labels.cuda(non_blocking=True)
optimizer.zero_grad()
if phase == 'train':
outputs = model(inputs)
else:
with torch.no_grad():
outputs = model(inputs)
probs = nn.Softmax(dim=1)(outputs)
# the size of output is [bs , 7]
preds = torch.max(probs, 1)[1]
# preds is the index of maxnum of output
# print(outputs)
# print(torch.max(outputs, 1))
loss = criterion(outputs, labels)
if phase == 'train':
loss.backward()
optimizer.step()
scheduler.step(loss)
# for name, parms in model.named_parameters():
# print('-->name:', name, '-->grad_requirs:', parms.requires_grad, \
# ' -->grad_value:', parms.grad)
# print('-->name:', name, ' -->grad_value:', parms.grad)
running_loss += loss.item() * inputs.size(0)
running_corrects += torch.sum(preds == labels.data)
print('\ntemp/label:{}/{}'.format(preds[0], labels[0]))
epoch_loss = running_loss / trainval_sizes[phase]
epoch_acc = running_corrects.double() / trainval_sizes[phase]
if phase == 'train':
writer.add_scalar('data/train_loss_epoch', epoch_loss, epoch)
writer.add_scalar('data/train_acc_epoch', epoch_acc, epoch)
else:
writer.add_scalar('data/val_loss_epoch', epoch_loss, epoch)
writer.add_scalar('data/val_acc_epoch', epoch_acc, epoch)
print("[{}] Epoch: {}/{} Loss: {} Acc: {}".format(
phase, epoch + 1, nEpochs, epoch_loss, epoch_acc))
stop_time = timeit.default_timer()
print("Execution time: " + str(stop_time - start_time) + "\n")
file.write("\n[{}] Epoch: {}/{} Loss: {} Acc: {}".format(
phase, epoch + 1, nEpochs, epoch_loss, epoch_acc))
if epoch % save_epoch == (save_epoch - 1):
torch.save(
{
'epoch': epoch + 1,
'state_dict': model.state_dict(),
'opt_dict': optimizer.state_dict(),
},
os.path.join(save_dir,
saveName + '_epoch-' + str(epoch) + '.pth.tar'))
print("Save model at {}\n".format(
os.path.join(save_dir,
saveName + '_epoch-' + str(epoch) + '.pth.tar')))
if useTest and epoch % test_interval == (test_interval - 1):
model.eval()
start_time = timeit.default_timer()
running_loss = 0.0
running_corrects = 0.0
for inputs, labels in tqdm(test_dataloader):
inputs = inputs.to(device)
labels = labels.to(device)
with torch.no_grad():
outputs = model(inputs)
probs = nn.Softmax(dim=1)(outputs)
preds = torch.max(probs, 1)[1]
loss = criterion(outputs, labels)
running_loss += loss.item() * inputs.size(0)
running_corrects += torch.sum(preds == labels.data)
epoch_loss = running_loss / test_size
epoch_acc = running_corrects.double() / test_size
writer.add_scalar('data/test_loss_epoch', epoch_loss, epoch)
writer.add_scalar('data/test_acc_epoch', epoch_acc, epoch)
print("[test] Epoch: {}/{} Loss: {} Acc: {}".format(
epoch + 1, nEpochs, epoch_loss, epoch_acc))
stop_time = timeit.default_timer()
print("Execution time: " + str(stop_time - start_time) + "\n")
file.write("\n[test] Epoch: {}/{} Loss: {} Acc: {}\n".format(
epoch + 1, nEpochs, epoch_loss, epoch_acc))
writer.close()
file.close()
class TOMTrainer:
def __init__(self,
gen,
dis,
dataloader_train,
dataloader_val,
gpu_id,
log_freq,
save_dir,
n_step,
optimizer='adam'):
if torch.cuda.is_available():
self.device = torch.device('cuda:' + str(gpu_id))
else:
self.device = torch.device('cpu')
self.gen = gen.to(self.device)
self.dis = dis.to(self.device)
self.dataloader_train = dataloader_train
self.dataloader_val = dataloader_val
if optimizer == 'adam':
self.optim_g = torch.optim.Adam(gen.parameters(),
lr=1e-4,
betas=(0.5, 0.999))
self.optim_d = torch.optim.Adam(dis.parameters(),
lr=1e-4,
betas=(0.5, 0.999))
elif optimizer == 'ranger':
self.optim_g = Ranger(gen.parameters())
self.optim_d = Ranger(dis.parameters())
self.criterionL1 = nn.L1Loss()
self.criterionVGG = VGGLoss()
self.criterionAdv = torch.nn.BCELoss()
self.log_freq = log_freq
self.save_dir = save_dir
self.n_step = n_step
self.step = 0
print('Generator Parameters:',
sum([p.nelement() for p in self.gen.parameters()]))
print('Discriminator Parameters:',
sum([p.nelement() for p in self.dis.parameters()]))
def train(self, epoch):
"""Iterate 1 epoch over train data and return loss
"""
return self.iteration(epoch, self.dataloader_train)
def val(self, epoch):
"""Iterate 1 epoch over validation data and return loss
"""
return self.iteration(epoch, self.dataloader_val, train=False)
def iteration(self, epoch, data_loader, train=True):
data_iter = tqdm(enumerate(data_loader),
desc='epoch: %d' % (epoch),
total=len(data_loader),
bar_format='{l_bar}{r_bar}')
total_loss = 0.0
FloatTensor = torch.cuda.FloatTensor if torch.cuda.is_available(
) else torch.FloatTensor
for i, _data in data_iter:
data = {}
for key, value in _data.items():
if not 'name' in key:
data[key] = value.to(self.device) # Load data on GPU
cloth = data['cloth']
cloth_mask = data['cloth_mask']
person = data['person']
batch_size = person.shape[0]
outputs = self.gen(torch.cat([data['feature'], cloth],
1)) # (batch, channel, height, width)
rendered_person, composition_mask = torch.split(outputs, 3, 1)
rendered_person = torch.tanh(rendered_person)
composition_mask = torch.sigmoid(composition_mask)
tryon_person = cloth * composition_mask + rendered_person * (
1 - composition_mask)
visuals = [[data['head'], data['shape'], data['pose']],
[cloth, cloth_mask * 2 - 1, composition_mask * 2 - 1],
[rendered_person, tryon_person, person]]
# Adversarial ground truths
real = Variable(FloatTensor(batch_size, 1).fill_(1.0),
requires_grad=False) # Batch size
fake = Variable(FloatTensor(batch_size, 1).fill_(0.0),
requires_grad=False)
# Loss measures generator's ability to fool the discriminator
l_l1 = self.criterionL1(tryon_person, person)
l_mask = self.criterionL1(composition_mask, cloth_mask)
l_vgg = self.criterionVGG(tryon_person, person)
metric = measure.compare_ssim(tryon_person,
person,
multichannel=True)
dis_fake = self.dis(
torch.cat([data['feature'], cloth, tryon_person],
1)) # Dis forward
l_adv = self.criterionAdv(dis_fake, real)
loss_g = l_l1 + l_vgg + l_mask + l_adv / batch_size
# Loss for discriminator
loss_d = ( self.criterionAdv(self.dis(torch.cat([data['feature'], cloth, person],1)), real) +\
self.criterionAdv(self.dis(torch.cat([data['feature'], cloth, tryon_person],1).detach()), fake) )\
/ 2
if train:
self.optim_g.zero_grad()
loss_g.backward()
self.optim_g.step()
self.optim_d.zero_grad()
loss_d.backward()
self.optim_d.step()
self.step += 1
total_loss = total_loss + loss_g.item() + loss_d.item()
post_fix = {
'epoch': epoch,
'iter': i,
'avg_loss': total_loss / (i + 1),
'loss_recon': l_l1.item() + l_vgg.item() + l_mask.item(),
'loss_g': l_adv.item(),
'loss_d': loss_d.item(),
'ssim': metric
}
if train and i % self.log_freq == 0:
data_iter.write(str(post_fix))
board_add_images(visuals, epoch, i,
os.path.join(self.save_dir, 'train'))
return total_loss / len(data_iter)
def train(model, exp_id):
save_model_dir = f'experiment/{exp_id}/save_models'
try:
os.mkdir(save_model_dir)
except Exception as e:
print(e)
# ==== INIT MODEL=================
device = get_device()
model.to(device)
optimizer = Ranger(model.parameters(),
lr=cfg["model_params"]["lr"],
weight_decay=0.0001)
train_dataloader, gt_dict = load_tune_data()
start = time.time()
train_result = {
'epoch': [],
'iter': [],
'loss[-k:](avg)': [],
'validation_loss': [],
'time(minute)': [],
}
def append_train_result(epoch, iter, avg_lossk, validation_loss, run_time):
train_result['epoch'].append(epoch)
train_result['iter'].append(iter)
train_result['loss[-k:](avg)'].append(avg_lossk)
train_result['validation_loss'].append(validation_loss)
train_result['time(minute)'].append(run_time)
k = 1000
lossk = []
torch.set_grad_enabled(True)
num_iter = len(train_dataloader)
print(num_iter)
for epoch in range(cfg['train_params']['epoch']):
model.train()
torch.set_grad_enabled(True)
tr_it = iter(train_dataloader)
train_progress_bar = tqdm(range(num_iter))
optimizer.zero_grad()
print('epoch:', epoch)
for i in train_progress_bar:
try:
data = next(tr_it)
preds, confidences = forward(data, model, device)
# convert to world positions
world_from_agents = data['world_from_agent'].float().to(device)
centroids = data['centroid'].float().to(device)
world_from_agents = world_from_agents.unsqueeze(1) # bs * 1 * 3 * 3
world_from_agents = world_from_agents.repeat(1, 3, 1, 1) # bs * 1 * 3 * 3
centroids = centroids.unsqueeze(1).unsqueeze(1)
centroids = centroids.repeat(1, 3, 50, 1)
preds = transform_ts_points(preds, world_from_agents.clone()) - centroids[:, :, :, :2].clone()
# get ground_truth
target_availabilities = []
target_positions = []
for track_id, timestamp in zip(data['track_id'], data['timestamp']):
key = str(track_id.item()) + str(timestamp.item())
target_positions.append(torch.tensor(gt_dict[key]['coord']))
target_availabilities.append(torch.tensor(gt_dict[key]['avail']))
target_availabilities = torch.stack(target_availabilities).to(device)
target_positions = torch.stack(target_positions).to(device)
loss = criterion(target_positions, preds, confidences, target_availabilities)
# Backward pass
optimizer.zero_grad()
loss.backward()
optimizer.step()
lossk.append(loss.item())
if len(lossk) > k:
lossk.pop(0)
train_progress_bar.set_description(
f"loss: {loss.item():.4f} loss[-k:](avg): {np.mean(lossk):.4f}")
if ((i > 0 and i % cfg['train_params']['checkpoint_steps'] == 0) or i == num_iter-1):
# save model per checkpoint
torch.save(model.state_dict(),
f'{save_model_dir}/epoch{epoch:02d}_iter{i:05d}.pth')
append_train_result(epoch, i, np.mean(lossk), -1, (time.time()-start)/60)
if ((i > 0 and i % cfg['train_params']['validation_steps'] == 0 )
or i == num_iter-1):
validation_loss = validation(model, device)
append_train_result(epoch, i, -1, validation_loss, (time.time()-start)/60)
model.train()
torch.set_grad_enabled(True)
except KeyboardInterrupt:
torch.save(model.state_dict(),
f'{save_model_dir}/interrupt_epoch{epoch:02d}_iter{i:05d}.pth')
# save train result
results = pd.DataFrame(train_result)
results.to_csv(
f"experiment/{exp_id}/interrupt_train_result.csv", index=False)
print(f"Total training time is {(time.time()-start)/60} mins")
print(results)
raise KeyboardInterrupt
# torch.save(model.state_dict(), f'{save_model_dir}/epoch{epoch:02d}_iter{i:05d}.pth')
del tr_it, train_progress_bar
# save train result
results = pd.DataFrame(train_result)
results.to_csv(f"experiment/{exp_id}/train_result.csv", index=False)
print(f"Total training time is {(time.time()-start)/60} mins")
print(results)
def main(conf):
if conf['method'] not in ['baseline', 'LmixLact', 'Lmix']:
raise ValueError("method must be baseline, LmixLact or Lmix")
# Set random seeds both for pytorch and numpy
th.manual_seed(conf['seed'])
np.random.seed(conf['seed'])
# Create experiment folder and save conf file with the final configuration
os.makedirs(conf['exp_dir'], exist_ok=True)
conf_path = os.path.join(conf['exp_dir'], 'conf.yml')
with open(conf_path, 'w') as outfile:
yaml.safe_dump(conf, outfile)
# Load test set. Be careful about is_wav!
test_set = musdb.DB(root=conf['musdb_path'], subsets=["test"], is_wav=True)
# Randomly choose the indexes of sentences to save.
ex_save_dir = os.path.join(conf['exp_dir'], 'examples/')
if conf['n_save_ex'] == -1:
conf['n_save_ex'] = len(test_set)
save_idx = random.sample(range(len(test_set)), conf['n_save_ex'])
# If stop_index==-1, evaluate the whole test set
if conf['stop_index'] == -1:
conf['stop_index'] = len(test_set)
# prepare data frames
results_applyact = museval.EvalStore()
results_adapt = museval.EvalStore()
silence_adapt = pd.DataFrame({
'target': [],
'PES': [],
'EPS': [],
'track': []
})
# Loop over test examples
for idx in range(len(test_set)):
torch.set_grad_enabled(False)
track = test_set.tracks[idx]
print(idx, str(track.name))
# Create local directory
local_save_dir = os.path.join(ex_save_dir, str(track.name))
os.makedirs(local_save_dir, exist_ok=True)
# Load mixture
mix = th.from_numpy(track.audio).t().float()
ref = mix.mean(dim=0) # mono mixture
mix = (mix - ref.mean()) / ref.std()
# Load pretrained model
klass, args, kwargs, state = torch.load(conf['model_path'], 'cpu')
model = klass(*args, **kwargs)
model.load_state_dict(state)
# Handle device placement
if conf['use_gpu']:
model.cuda()
device = next(model.parameters()).device
# Create references matrix
references = th.stack([
th.from_numpy(track.targets[name].audio) for name in source_names
])
references = references.numpy()
# Get activations
H = []
for name in source_names:
audio = track.targets[name].audio
H.append(audio)
H = np.array(H)
_, bn_ch1, _ = compute_activation_confidence(H[:, :, 0],
theta=conf['th'],
hilb=False)
_, bn_ch2, _ = compute_activation_confidence(H[:, :, 1],
theta=conf['th'],
hilb=False)
activations = th.from_numpy(np.stack((bn_ch1, bn_ch2), axis=2))
# FINE TUNING
if conf['method'] != 'baseline':
print('ADAPTATION')
torch.set_grad_enabled(True)
# Freeze layers
freeze(model.encoder)
freeze(model.separator, n=conf['frozen_layers'])
if conf['freeze_decoder']:
freeze(model.decoder)
# optimizer = torch.optim.Adam(filter(lambda p: p.requires_grad, model.parameters()), lr=conf['lr_fine'])
optimizer = Ranger(filter(lambda p: p.requires_grad,
model.parameters()),
lr=conf['lr_fine'])
loss_func = nn.L1Loss()
# Initialize writer for Tensorboard
writer = SummaryWriter(log_dir=local_save_dir)
for epoch in range(conf['epochs_fine']):
total_loss = 0
epoch_loss = 0
total_rec = 0
epoch_rec = 0
total_act = 0
epoch_act = 0
if conf['monitor_metrics']:
total_sdr = dict([(key, 0) for key in source_names])
epoch_sdr = dict([(key, 0) for key in source_names])
total_sir = dict([(key, 0) for key in source_names])
epoch_sir = dict([(key, 0) for key in source_names])
total_sar = dict([(key, 0) for key in source_names])
epoch_sar = dict([(key, 0) for key in source_names])
total_isr = dict([(key, 0) for key in source_names])
epoch_isr = dict([(key, 0) for key in source_names])
# Data loader with eventually data augmentation
mix_set = DAdataloader(mix.numpy(),
win=conf['win_fine'],
hop=conf['hop_fine'],
sample_rate=conf['sample_rate'],
n_observations=conf['n_observations'],
pitch_list=conf['pitch_list'],
min_semitones=conf['min_semitones'],
max_semitones=conf['max_semitones'],
same_pitch_list_all_chunks=conf[
'same_pitch_list_all_chunks'])
# Iterate over chuncks
for t, item in enumerate(mix_set):
sample, win, _ = item
mix_chunk = th.from_numpy(sample[None, :, :]).to(device)
est_chunk = model(cp(mix_chunk))
act_chunk = activations[None, :,
win, :].transpose(3, 2).to(device)
loss_act = loss_func(est_chunk * (1 - act_chunk),
torch.zeros_like(est_chunk))
if conf['method'] == 'LmixLact':
loss_rec = loss_func(
mix_chunk, torch.sum(est_chunk * act_chunk, dim=1))
loss = loss_rec + conf['gamma'] * loss_act
if conf['method'] == 'Lmix':
loss_rec = loss_func(mix_chunk,
torch.sum(est_chunk, dim=1))
loss = loss_rec
loss.backward()
optimizer.step()
optimizer.zero_grad()
total_loss += loss.item()
epoch_loss = total_loss / (1 + t)
total_rec += loss_rec.item()
total_act += loss_act.item()
epoch_rec = total_rec / (1 + t)
epoch_act = total_act / (1 + t)
# Monitor sdr, sir, and sar over epochs
if conf['monitor_metrics']:
ref_chunk = references[:, win, :]
skip = False
for i, target in enumerate(source_names):
if np.sum(ref_chunk[i, :, :]**2) == 0:
skip = True
if not skip:
sdr, isr, sir, sar = museval.evaluate(
ref_chunk,
est_chunk.squeeze().transpose(
1, 2).detach().cpu().numpy(),
win=np.inf)
sdr = np.array(sdr)
sir = np.array(sir)
sar = np.array(sar)
isr = np.array(isr)
for i, target in enumerate(source_names):
total_sdr[target] += sdr[i]
epoch_sdr[target] = total_sdr[target] / (1 + t)
total_sir[target] += sir[i]
epoch_sir[target] = total_sir[target] / (1 + t)
total_sar[target] += sar[i]
epoch_sar[target] = total_sar[target] / (1 + t)
total_isr[target] += isr[i]
epoch_isr[target] = total_isr[target] / (1 + t)
if conf['monitor_metrics']:
for i, target in enumerate(source_names):
writer.add_scalar("SDR/" + target, epoch_sdr[target],
epoch)
writer.add_scalar("SIR/" + target, epoch_sir[target],
epoch)
writer.add_scalar("SAR/" + target, epoch_sar[target],
epoch)
writer.add_scalar("ISR/" + target, epoch_isr[target],
epoch)
writer.add_scalar("Loss/total", epoch_loss, epoch)
writer.add_scalar("Loss/rec", epoch_rec, epoch)
writer.add_scalar("Loss/act", epoch_act, epoch)
print('epoch, nr of training examples and loss: ', epoch, t,
epoch_loss, epoch_rec, epoch_act, epoch_sdr['other'])
writer.flush()
writer.close()
# apply model
print('Apply model')
estimates = apply_model(model,
mix.to(device),
shifts=conf['shifts'],
split=conf['split'])
estimates = estimates * ref.std() + ref.mean()
estimates = estimates.transpose(1, 2).cpu().numpy()
# get results of this track
print('Evaluate model')
assert references.shape == estimates.shape
track_store, silence_frames = evaluate_mia(ref=references,
est=estimates,
track_name=track.name,
source_names=source_names,
eval_silence=True,
conf=conf)
# aggregate results over the track and save the partials
silence_adapt = silence_adapt.append(silence_frames, ignore_index=True)
silence_adapt.to_json(os.path.join(conf['exp_dir'], 'silence.json'),
orient='records')
results_adapt.add_track(track_store)
results_adapt.save(os.path.join(conf['exp_dir'],
'bss_eval_tracks.pkl'))
print(results_adapt)
# Save some examples with corresponding metrics in a folder
if idx in save_idx:
silence_frames.to_json(os.path.join(local_save_dir,
'silence_frames.json'),
orient='records')
with open(os.path.join(local_save_dir, 'metrics_museval.json'),
'w+') as f:
f.write(track_store.json)
sf.write(os.path.join(local_save_dir, "mixture.wav"),
mix.transpose(0, 1).cpu().numpy(), conf['sample_rate'])
for name, estimate, reference, activation in zip(
source_names, estimates, references, activations):
print(name)
unique, counts = np.unique(activation, return_counts=True)
print(dict(zip(unique, counts / (len(activation) * 2) * 100)))
assert estimate.shape == reference.shape
sf.write(os.path.join(local_save_dir, name + "_est.wav"),
estimate, conf['sample_rate'])
sf.write(os.path.join(local_save_dir, name + "_ref.wav"),
reference, conf['sample_rate'])
sf.write(os.path.join(local_save_dir, name + "_act.wav"),
activation.cpu().numpy(), conf['sample_rate'])
# Evaluate results when applying the activations to the output
if conf['apply_act_output']:
track_store_applyact, _ = evaluate_mia(ref=references,
est=estimates *
activations.cpu().numpy(),
track_name=track.name,
source_names=source_names,
eval_silence=False,
conf=conf)
# aggregate results over the track and save the partials
results_applyact.add_track(track_store_applyact)
print('after applying activations')
print(results_applyact)
results_applyact.save(
os.path.join(conf['exp_dir'], 'bss_eval_tracks_applyact.pkl'))
# Save some examples with corresponding metrics in a folder
if idx in save_idx:
with open(
os.path.join(local_save_dir,
'metrics_museval_applyact.json'),
'w+') as f:
f.write(track_store_applyact.json)
del track_store_applyact
# Delete some variables
del references, mix, estimates, track, track_store, silence_frames, model
# Stop if reached the limit
if idx == conf['stop_index']:
break
print('------------------')
# Print and save aggregated results
print('Final results')
print(results_adapt)
method = museval.MethodStore()
method.add_evalstore(results_adapt, conf['exp_dir'])
method.save(os.path.join(conf['exp_dir'], 'bss_eval.pkl'))
if conf['eval_silence']:
print(
"mean over evaluation frames, mean over channels, mean over tracks"
)
for target in source_names:
print(
target + ' ==>',
silence_adapt.loc[silence_adapt['target'] == target].mean(
axis=0, skipna=True))
silence_adapt.to_json(os.path.join(conf['exp_dir'], 'silence.json'),
orient='records')
print('Final results apply act')
print(results_applyact)
method = museval.MethodStore()
method.add_evalstore(results_applyact, conf['exp_dir'])
method.save(os.path.join(conf['exp_dir'], 'bss_eval_applyact.pkl'))
# sched = CosineDecay(
# opt, total_steps=len(loaders['train']) * (epochs - warmup_steps + 1),
# linear_start=eta_min, linear_frac=0.1, min_lr=3e-6)
# global_step = 0
iteration = dict(epoch=epoch, train_loss=list(), valid_loss=list())
for name, loader in loaders.items():
is_training = name == 'train'
count = 0
metric = 0.0
with torch.set_grad_enabled(is_training):
for batch_no, batch in enumerate(loader):
steps[name] += 1
opt.zero_grad()
# y = batch['site1']['targets'].to(device)
y = batch['site1']['targets_one_hot'].to(device)
out = model(batch['site1']['features'].to(device),
batch['site2']['features'].to(device))
if is_training:
global_step += 1
loss = loss_fn(out, y)
loss.backward()
opt.step()
#if (epoch == (warmup_steps - 1)) and batch_no == (len(loader) - 1):
# pass # skip
def train_alphaBert_stage1(TS_model,
dloader,
testloader,
lr=1e-4,
epoch=10,
log_interval=20,
cloze_fix=True,
use_amp=False,
lkahead=False,
parallel=True):
global checkpoint_file
TS_model.to(device)
# model_optimizer = optim.Adam(TS_model.parameters(), lr=lr)
# if lkahead:
# print('using Lookahead')
# model_optimizer = lookahead_pytorch.Lookahead(model_optimizer, la_steps=5, la_alpha=0.5)
model_optimizer = Ranger(TS_model.parameters(), lr=lr)
if use_amp:
TS_model, model_optimizer = amp.initialize(TS_model,
model_optimizer,
opt_level="O1")
if parallel:
TS_model = torch.nn.DataParallel(TS_model)
# torch.distributed.init_process_group(backend='nccl',
# init_method='env://host',
# world_size=0,
# rank=0,
# store=None,
# group_name='')
# TS_model = DDP(TS_model)
# TS_model = apex.parallel.DistributedDataParallel(TS_model)
TS_model.train()
# criterion = alphabert_loss.Alphabert_satge1_loss(device=device)
criterion = nn.CrossEntropyLoss(ignore_index=-1).to(device)
iteration = 0
total_loss = []
out_pred_res = []
out_pred_test = []
for ep in range(epoch):
t0 = time.time()
# step_loss = 0
epoch_loss = 0
epoch_cases = 0
for batch_idx, sample in enumerate(dloader):
# TS_model.train()
model_optimizer.zero_grad()
loss = 0
src = sample['src_token']
trg = sample['trg']
att_mask = sample['mask_padding']
origin_len = sample['origin_seq_length']
bs, max_len = src.shape
# src, err_cloze = make_cloze(src,
# max_len,
# device=device,
# percent=0.15,
# fix=cloze_fix)
src = src.float().to(device)
trg = trg.long().to(device)
att_mask = att_mask.float().to(device)
origin_len = origin_len.to(device)
prediction_scores, = TS_model(input_ids=src,
attention_mask=att_mask)
# print(1111,prediction_scores.view(-1,84).shape)
# print(1111,trg.view(-1).shape)
loss = criterion(
prediction_scores.view(-1, 100).contiguous(),
trg.view(-1).contiguous())
if use_amp:
with amp.scale_loss(loss, model_optimizer) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
model_optimizer.step()
with torch.no_grad():
epoch_loss += loss.item() * bs
epoch_cases += bs
if iteration % log_interval == 0:
print('Ep:{} [{} ({:.0f}%)/ ep_time:{:.0f}min] L:{:.4f}'.
format(ep, batch_idx * batch_size,
100. * batch_idx / len(dloader),
(time.time() - t0) * len(dloader) /
(60 * (batch_idx + 1)), loss.item()))
if iteration % 400 == 0:
save_checkpoint(checkpoint_file,
'd2s_total.pth',
TS_model,
model_optimizer,
parallel=parallel)
a_ = tokenize_alphabets.convert_idx2str(
src[0][:origin_len[0]])
print(a_)
print(' ******** ******** ******** ')
_, show_pred = torch.max(prediction_scores[0], dim=1)
err_cloze_ = trg[0] > -1
src[0][err_cloze_] = show_pred[err_cloze_].float()
b_ = tokenize_alphabets.convert_idx2str(
src[0][:origin_len[0]])
print(b_)
print(' ******** ******** ******** ')
src[0][err_cloze_] = trg[0][err_cloze_].float()
c_ = tokenize_alphabets.convert_idx2str(
src[0][:origin_len[0]])
print(c_)
out_pred_res.append((ep, a_, b_, c_, err_cloze_))
out_pd_res = pd.DataFrame(out_pred_res)
out_pd_res.to_csv('./result/out_pred_train.csv', sep=',')
if iteration % 999 == 0:
print(' ===== Show the Test of Pretrain ===== ')
test_res = test_alphaBert_stage1(TS_model, testloader)
print(' ===== Show the Test of Pretrain ===== ')
out_pred_test.append((ep, *test_res))
out_pd_test = pd.DataFrame(out_pred_test)
out_pd_test.to_csv('./result/out_pred_test.csv', sep=',')
iteration += 1
if ep % 1 == 0:
save_checkpoint(checkpoint_file,
'd2s_total.pth',
TS_model,
model_optimizer,
parallel=parallel)
print('======= epoch:%i ========' % ep)
print('++ Ep Time: {:.1f} Secs ++'.format(time.time() - t0))
total_loss.append(float(epoch_loss / epoch_cases))
pd_total_loss = pd.DataFrame(total_loss)
pd_total_loss.to_csv('./result/total_loss_pretrain.csv', sep=',')
print(total_loss)
def train(model, exp_id):
save_model_dir = f'experiment/{exp_id}/save_models'
try:
os.mkdir(save_model_dir)
except Exception as e:
print(e)
# ==== INIT MODEL=================
device = get_device()
model.to(device)
optimizer = Ranger(model.parameters(), lr=cfg["model_params"]["lr"])
train_dataloader = load_train_data()
start = time.time()
train_result = {
'epoch': [],
'iter': [],
'loss[-k:](avg)': [],
'validation_loss': [],
'time(minute)': [],
}
k = 1000
lossk = []
torch.set_grad_enabled(True)
num_iter = cfg["train_params"]["max_num_steps"]
for epoch in range(cfg['train_params']['epoch']):
model.train()
torch.set_grad_enabled(True)
tr_it = iter(train_dataloader)
train_progress_bar = tqdm(range(num_iter))
optimizer.zero_grad()
print('epoch:', epoch)
for i in train_progress_bar:
try:
data = next(tr_it)
preds, confidences = forward(data, model, device)
target_availabilities = data["target_availabilities"].to(
device)
targets = data["target_positions"].to(device)
loss = criterion(targets, preds, confidences,
target_availabilities)
# Backward pass
optimizer.zero_grad()
loss.backward()
optimizer.step()
# total_loss.append(loss.item())
lossk.append(loss.item())
if len(lossk) > k:
lossk.pop(0)
train_progress_bar.set_description(
f"loss: {loss.item():.4f} loss[-k:](avg): {np.mean(lossk):.4f}"
)
if ((i > 0
and i % cfg['train_params']['checkpoint_steps'] == 0)
or i == num_iter - 1):
# save model per checkpoint
torch.save(
model.state_dict(),
f'{save_model_dir}/epoch{epoch:02d}_iter{i:05d}.pth')
# save_result
train_result['epoch'].append(epoch)
train_result['iter'].append(i)
train_result['loss[-k:](avg)'].append(np.mean(lossk))
train_result['validation_loss'].append(-1)
train_result['time(minute)'].append(
(time.time() - start) / 60)
checkpoint_loss = []
if i > 0 and i % cfg['train_params']['validation_steps'] == 0:
validation_loss = validation(model, device)
train_result['epoch'].append(epoch)
train_result['iter'].append(-1)
train_result['loss[-k:](avg)'].append(-1)
train_result['validation_loss'].append(validation_loss)
train_result['time(minute)'].append(
(time.time() - start) / 60)
model.train()
torch.set_grad_enabled(True)
except KeyboardInterrupt:
torch.save(
model.state_dict(),
f'{save_model_dir}/interrupt_epoch{epoch:02d}_iter{i:05d}.pth'
)
# save train result
results = pd.DataFrame(train_result)
results.to_csv(
f"experiment/{exp_id}/interrupt_train_result.csv",
index=False)
print(f"Total training time is {(time.time()-start)/60} mins")
print(results)
raise KeyboardInterrupt
del tr_it, train_progress_bar
# save train result
results = pd.DataFrame(train_result)
results.to_csv(f"experiment/{exp_id}/train_result.csv", index=False)
print(f"Total training time is {(time.time()-start)/60} mins")
print(results)
class Learner:
def __init__(self, autoencoder: LSTMAutoEncoder, train_loader: DataLoader,
val_loader: DataLoader, cfg: Config):
self.net = autoencoder
self.train_loader = train_loader
self.val_loader = val_loader
# get from config object
output_dir = os.path.join(cfg.OUTPUT_DIR, cfg.EXPERIMENT_NAME)
os.makedirs(output_dir, exist_ok=True)
self.output_dir = output_dir
self.device = cfg.DEVICE
self.epoch_n = cfg.EPOCH_N
self.save_cycle = cfg.SAVE_CYCLE
self.verbose_cycle = cfg.VERBOSE_CYCLE
self.encoder_lr = cfg.ENCODER_LR
self.decoder_lr = cfg.DECODER_LR
self.encoder_gamma = cfg.ENCODER_GAMMA
self.decoder_gamma = cfg.DECODER_GAMMA
self.encoder_step_cycle = cfg.ENCODER_STEP_CYCLE
self.decoder_step_cycle = cfg.DECODER_STEP_CYCLE
# set optimizer and scheduler
self.encoder_optim = Ranger(params=filter(lambda p: p.requires_grad,
self.encoder.parameters()),
lr=self.encoder_lr)
self.decoder_optim = Ranger(params=filter(lambda p: p.requires_grad,
self.decoder.parameters()),
lr=self.encoder_lr)
self.encoder_stepper = StepLR(self.encoder_optim,
step_size=self.encoder_step_cycle,
gamma=self.encoder_gamma)
self.decoder_stepper = StepLR(self.decoder_optim,
step_size=self.decoder_step_cycle,
gamma=self.decoder_gamma)
self.loss = nn.MSELoss()
# for book-keeping
self.crt_epoch = 0
self.train_losses = []
self.val_losses = []
@property
def encoder(self):
return self.net.encoder
@property
def decoder(self):
return self.net.decoder
@property
def signature(self):
return f'[Epoch: {self.crt_epoch}]'
@property
def model_path(self):
model_name = f'lstm_ae_{self.crt_epoch:04}.pth'
_path = os.path.join(self.output_dir, model_name)
return _path
@property
def csv_path(self):
csv_name = f'report.csv'
return os.path.join(self.output_dir, csv_name)
def train(self):
logger.info('Start training...')
self.net.to(self.device)
for epoch_i in range(self.epoch_n):
self.crt_epoch = epoch_i + 1
start_t = time.time()
epoch_min = self._train_one_epoch()
if self.crt_epoch % self.verbose_cycle == 0:
train_avg_rmse = self.train_losses[-1]
logger.info(
f'{self.signature}:: Train complete. Avg RMSE: {train_avg_rmse:04f}. Time: {epoch_min:03f} mins'
)
epoch_min = self._val_one_epoch()
if self.crt_epoch % self.verbose_cycle == 0:
val_avg_rmse = self.val_losses[-1]
logger.info(
f'{self.signature}:: Val complete. Avg RMSE: {val_avg_rmse:04f}. Time: {epoch_min:03f} mins'
)
total_epoch_min = (time.time() - start_t) / 60.
if self.crt_epoch % self.verbose_cycle == 0:
logger.info(
f'{self.signature}:: Completed Train + Val. Time: {total_epoch_min} mins'
)
if self.crt_epoch % self.save_cycle == 0:
self.save_model()
self.save_report()
logger.info(
f'{self.signature}:: Model saved: {self.model_path}')
logger.info(f'{self.signature}:: Training complete!')
self.save_model()
self.save_report()
logger.info(
f'{self.signature}:: Final Model and Report saved: {self.model_path}, {self.csv_path}'
)
def _train_one_epoch(self):
self.net.train()
start_t = time.time()
rmse_ls = []
for bboxs, seq_lens, classes in tqdm(self.train_loader):
self.encoder_optim.zero_grad()
self.decoder_optim.zero_grad()
bboxs = bboxs.to(self.device)
preds = self.net(bboxs)
preds = pack_padded_sequence(preds,
seq_lens,
batch_first=True,
enforce_sorted=True)
targets = pack_padded_sequence(bboxs.clone(),
seq_lens,
batch_first=True,
enforce_sorted=True)
loss = self.loss(preds.data, targets.data)
rmse = torch.sqrt(loss)
rmse.backward()
self.encoder_optim.step()
self.decoder_optim.step()
self.encoder_stepper.step()
self.decoder_stepper.step()
report_rmse = float(rmse.data.cpu().numpy())
rmse_ls.append(report_rmse)
epoch_min = (time.time() - start_t) / 60.
avg_rmse = sum(rmse_ls) / len(rmse_ls)
self.train_losses.append(avg_rmse)
return epoch_min
def _val_one_epoch(self):
self.net.eval()
start_t = time.time()
rmse_ls = []
with torch.no_grad():
for bboxs, seq_lens, classes in tqdm(self.val_loader):
bboxs = bboxs.to(self.device)
preds = self.net(bboxs)
preds = pack_padded_sequence(preds,
seq_lens,
batch_first=True,
enforce_sorted=True)
targets = pack_padded_sequence(bboxs.clone(),
seq_lens,
batch_first=True,
enforce_sorted=True)
loss = self.loss(preds.data, targets.data)
rmse = torch.sqrt(loss)
report_rmse = float(rmse.data.cpu().numpy())
rmse_ls.append(report_rmse)
epoch_min = (time.time() - start_t) / 60.
avg_rmse = sum(rmse_ls) / len(rmse_ls)
self.val_losses.append(avg_rmse)
return epoch_min
def save_model(self):
torch.save(self.net.state_dict(), self.model_path)
def load_model(self, ckpt_path):
assert os.path.isfile(ckpt_path), f'Non-exist ckpt_path: {ckpt_path}'
self.net.load_state_dict(torch.load(ckpt_path))
logger.info(f'Model loaded: {ckpt_path}')
def save_report(self):
losses_dicts = {
'train_losses': self.train_losses,
'val_losses': self.val_losses
}
df = pd.DataFrame(losses_dicts)
df.to_csv(self.csv_path, index=False)
def train():
if not os.path.exists(args.save_folder):
os.mkdir(args.save_folder)
dataset = COCODetection(image_path=cfg.dataset.train_images,
info_file=cfg.dataset.train_info,
transform=SSDAugmentation(MEANS))
if args.validation_epoch > 0:
setup_eval()
val_dataset = COCODetection(image_path=cfg.dataset.valid_images,
info_file=cfg.dataset.valid_info,
transform=BaseTransform(MEANS))
# Parallel wraps the underlying module, but when saving and loading we don't want that
yolact_net = Yolact()
net = yolact_net
net.train()
print('\n--- Generator created! ---')
# NOTE
# I maunally set the original image size and seg size as 138
# might change in the future, for example 550
if cfg.pred_seg:
dis_size = 138
dis_net = Discriminator_Wgan(i_size = dis_size, s_size = dis_size)
# Change the initialization inside the dis_net class inside
# set the dis net's initial parameter values
# dis_net.apply(gan_init)
dis_net.train()
print('--- Discriminator created! ---\n')
if args.log:
log = Log(cfg.name, args.log_folder, dict(args._get_kwargs()),
overwrite=(args.resume is None), log_gpu_stats=args.log_gpu)
# I don't use the timer during training (I use a different timing method).
# Apparently there's a race condition with multiple GPUs, so disable it just to be safe.
timer.disable_all()
# Both of these can set args.resume to None, so do them before the check
if args.resume == 'interrupt':
args.resume = SavePath.get_interrupt(args.save_folder)
elif args.resume == 'latest':
args.resume = SavePath.get_latest(args.save_folder, cfg.name)
if args.resume is not None:
print('Resuming training, loading {}...'.format(args.resume))
yolact_net.load_weights(args.resume)
if args.start_iter == -1:
args.start_iter = SavePath.from_str(args.resume).iteration
else:
print('Initializing weights...')
yolact_net.init_weights(backbone_path=args.save_folder + cfg.backbone.path)
# optimizer_gen = optim.SGD(net.parameters(), lr=args.lr, momentum=args.momentum,
# weight_decay=args.decay)
# if cfg.pred_seg:
# optimizer_dis = optim.SGD(dis_net.parameters(), lr=cfg.dis_lr, momentum=args.momentum,
# weight_decay=args.decay)
# schedule_dis = ReduceLROnPlateau(optimizer_dis, mode = 'min', patience=6, min_lr=1E-6)
# NOTE: Using the Ranger Optimizer for the generator
optimizer_gen = Ranger(net.parameters(), lr = args.lr, weight_decay=args.decay)
# optimizer_gen = optim.RMSprop(net.parameters(), lr = args.lr)
# FIXME: Might need to modify the lr in the optimizer carefually
# check this
# def make_D_optimizer(cfg, model):
# params = []
# for key, value in model.named_parameters():
# if not value.requires_grad:
# continue
# lr = cfg.SOLVER.BASE_LR/5.0
# weight_decay = cfg.SOLVER.WEIGHT_DECAY
# if "bias" in key:
# lr = cfg.SOLVER.BASE_LR * cfg.SOLVER.BIAS_LR_FACTOR/5.0
# weight_decay = cfg.SOLVER.WEIGHT_DECAY_BIAS
# params += [{"params": [value], "lr": lr, "weight_decay": weight_decay}]
# optimizer = torch.optim.SGD(params, lr, momentum=cfg.SOLVER.MOMENTUM)
# return optimizer
if cfg.pred_seg:
optimizer_dis = optim.SGD(dis_net.parameters(), lr=cfg.dis_lr)
# optimizer_dis = optim.RMSprop(dis_net.parameters(), lr = cfg.dis_lr)
schedule_dis = ReduceLROnPlateau(optimizer_dis, mode = 'min', patience=6, min_lr=1E-6)
criterion = MultiBoxLoss(num_classes=cfg.num_classes,
pos_threshold=cfg.positive_iou_threshold,
neg_threshold=cfg.negative_iou_threshold,
negpos_ratio=cfg.ohem_negpos_ratio, pred_seg=cfg.pred_seg)
# criterion_dis = nn.BCELoss()
# Take the advice from WGAN
criterion_dis = DiscriminatorLoss_Maskrcnn()
criterion_gen = GeneratorLoss_Maskrcnn()
if args.batch_alloc is not None:
# e.g. args.batch_alloc: 24,24
args.batch_alloc = [int(x) for x in args.batch_alloc.split(',')]
if sum(args.batch_alloc) != args.batch_size:
print('Error: Batch allocation (%s) does not sum to batch size (%s).' % (args.batch_alloc, args.batch_size))
exit(-1)
net = CustomDataParallel(NetLoss(net, criterion, pred_seg=cfg.pred_seg))
if args.cuda:
net = net.cuda()
# NOTE
if cfg.pred_seg:
dis_net = nn.DataParallel(dis_net)
dis_net = dis_net.cuda()
# Initialize everything
if not cfg.freeze_bn: yolact_net.freeze_bn() # Freeze bn so we don't kill our means
yolact_net(torch.zeros(1, 3, cfg.max_size, cfg.max_size).cuda())
if not cfg.freeze_bn: yolact_net.freeze_bn(True)
# loss counters
loc_loss = 0
conf_loss = 0
iteration = max(args.start_iter, 0)
last_time = time.time()
epoch_size = len(dataset) // args.batch_size
num_epochs = math.ceil(cfg.max_iter / epoch_size)
# Which learning rate adjustment step are we on? lr' = lr * gamma ^ step_index
step_index = 0
data_loader = data.DataLoader(dataset, args.batch_size,
num_workers=args.num_workers,
shuffle=True, collate_fn=detection_collate,
pin_memory=True)
# NOTE
val_loader = data.DataLoader(val_dataset, args.batch_size,
num_workers=args.num_workers*2,
shuffle=True, collate_fn=detection_collate,
pin_memory=True)
save_path = lambda epoch, iteration: SavePath(cfg.name, epoch, iteration).get_path(root=args.save_folder)
time_avg = MovingAverage()
global loss_types # Forms the print order
# TODO: global command can modify global variable inside of the function.
loss_avgs = { k: MovingAverage(100) for k in loss_types }
# NOTE
# Enable AMP
amp_enable = cfg.amp
scaler = torch.cuda.amp.GradScaler(enabled=amp_enable)
print('Begin training!')
print()
# try-except so you can use ctrl+c to save early and stop training
try:
for epoch in range(num_epochs):
# Resume from start_iter
if (epoch+1)*epoch_size < iteration:
continue
for datum in data_loader:
# Stop if we've reached an epoch if we're resuming from start_iter
if iteration == (epoch+1)*epoch_size:
break
# Stop at the configured number of iterations even if mid-epoch
if iteration == cfg.max_iter:
break
# Change a config setting if we've reached the specified iteration
changed = False
for change in cfg.delayed_settings:
if iteration >= change[0]:
changed = True
cfg.replace(change[1])
# Reset the loss averages because things might have changed
for avg in loss_avgs:
avg.reset()
# If a config setting was changed, remove it from the list so we don't keep checking
if changed:
cfg.delayed_settings = [x for x in cfg.delayed_settings if x[0] > iteration]
# Warm up by linearly interpolating the learning rate from some smaller value
if cfg.lr_warmup_until > 0 and iteration <= cfg.lr_warmup_until:
set_lr(optimizer_gen, (args.lr - cfg.lr_warmup_init) * (iteration / cfg.lr_warmup_until) + cfg.lr_warmup_init)
# Adjust the learning rate at the given iterations, but also if we resume from past that iteration
while step_index < len(cfg.lr_steps) and iteration >= cfg.lr_steps[step_index]:
step_index += 1
set_lr(optimizer_gen, args.lr * (args.gamma ** step_index))
# NOTE
if cfg.pred_seg:
# ====== GAN Train ======
# train the gen and dis in different iteration
# it_alter_period = iteration % (cfg.gen_iter + cfg.dis_iter)
# FIXME:
# present_time = time.time()
for _ in range(cfg.dis_iter):
# freeze_pretrain(yolact_net, freeze=False)
# freeze_pretrain(net, freeze=False)
# freeze_pretrain(dis_net, freeze=False)
# if it_alter_period == 0:
# print('--- Generator freeze ---')
# print('--- Discriminator training ---')
if cfg.amp:
with torch.cuda.amp.autocast():
# ----- Discriminator part -----
# seg_list is the prediction mask
# can be regarded as generated images from YOLACT
# pred_list is the prediction label
# seg_list dim: list of (138,138,instances)
# pred_list dim: list of (instances)
losses, seg_list, pred_list = net(datum)
seg_clas, mask_clas, b, seg_size = seg_mask_clas(seg_list, pred_list, datum)
# input image size is [b, 3, 550, 550]
# downsample to [b, 3, seg_h, seg_w]
image_list = [img.to(cuda0) for img in datum[0]]
image = interpolate(torch.stack(image_list), size = seg_size,
mode='bilinear',align_corners=False)
# Because in the discriminator training, we do not
# want the gradient flow back to the generator part
# we detach seg_clas (mask_clas come the data, does not have grad)
output_pred = dis_net(img = image.detach(), seg = seg_clas.detach())
output_grou = dis_net(img = image.detach(), seg = mask_clas.detach())
# p = elem_mul_p.squeeze().permute(1,2,0).cpu().detach().numpy()
# g = elem_mul_g.squeeze().permute(1,2,0).cpu().detach().numpy()
# image = image.squeeze().permute(1,2,0).cpu().detach().numpy()
# from PIL import Image
# seg_PIL = Image.fromarray(p, 'RGB')
# mask_PIL = Image.fromarray(g, 'RGB')
# seg_PIL.save('mul_seg.png')
# mask_PIL.save('mul_mask.png')
# raise RuntimeError
# from matplotlib import pyplot as plt
# fig, (ax1, ax2) = plt.subplots(1,2)
# ax1.imshow(mask_show)
# ax2.imshow(seg_show)
# plt.show(block=False)
# plt.pause(2)
# plt.close()
# if iteration % (cfg.gen_iter + cfg.dis_iter) == 0:
# print(f'Probability of fake is fake: {output_pred.mean().item():.2f}')
# print(f'Probability of real is real: {output_grou.mean().item():.2f}')
# 0 for Fake/Generated
# 1 for True/Ground Truth
# fake_label = torch.zeros(b)
# real_label = torch.ones(b)
# Advice of practical implementation
# from https://arxiv.org/abs/1611.08408
# loss_pred = -criterion_dis(output_pred,target=real_label)
# loss_pred = criterion_dis(output_pred,target=fake_label)
# loss_grou = criterion_dis(output_grou,target=real_label)
# loss_dis = loss_pred + loss_grou
# Wasserstein Distance (Earth-Mover)
loss_dis = criterion_dis(input=output_grou,target=output_pred)
# Backprop the discriminator
# Scales loss. Calls backward() on scaled loss to create scaled gradients.
scaler.scale(loss_dis).backward()
scaler.step(optimizer_dis)
scaler.update()
optimizer_dis.zero_grad()
# clip the updated parameters
_ = [par.data.clamp_(-cfg.clip_value, cfg.clip_value) for par in dis_net.parameters()]
# ----- Generator part -----
# freeze_pretrain(yolact_net, freeze=False)
# freeze_pretrain(net, freeze=False)
# freeze_pretrain(dis_net, freeze=False)
# if it_alter_period == (cfg.dis_iter+1):
# print('--- Generator training ---')
# print('--- Discriminator freeze ---')
# FIXME:
# print(f'dis time pass: {time.time()-present_time:.2f}')
# FIXME:
# present_time = time.time()
with torch.cuda.amp.autocast():
losses, seg_list, pred_list = net(datum)
seg_clas, mask_clas, b, seg_size = seg_mask_clas(seg_list, pred_list, datum)
image_list = [img.to(cuda0) for img in datum[0]]
image = interpolate(torch.stack(image_list), size = seg_size,
mode='bilinear',align_corners=False)
# Perform forward pass of all-fake batch through D
# NOTE this seg_clas CANNOT detach, in order to flow the
# gradient back to the generator
# output = dis_net(img = image, seg = seg_clas)
# Since the log(1-D(G(x))) not provide sufficient gradients
# We want log(D(G(x)) instead, this can be achieve by
# use the real_label as target.
# This step is crucial for the information of discriminator
# to go into the generator.
# Calculate G's loss based on this output
# real_label = torch.ones(b)
# loss_gen = criterion_dis(output,target=real_label)
# GAN MaskRCNN
output_pred = dis_net(img = image, seg = seg_clas)
output_grou = dis_net(img = image, seg = mask_clas)
# Advice from WGAN
# loss_gen = -torch.mean(output)
loss_gen = criterion_gen(input=output_grou,target=output_pred)
# since the dis is already freeze, the gradients will only
# record the YOLACT
losses = { k: (v).mean() for k,v in losses.items() } # Mean here because Dataparallel
loss = sum([losses[k] for k in losses])
loss += loss_gen
# Generator backprop
scaler.scale(loss).backward()
scaler.step(optimizer_gen)
scaler.update()
optimizer_gen.zero_grad()
# FIXME:
# print(f'gen time pass: {time.time()-present_time:.2f}')
# print('GAN part over')
else:
losses, seg_list, pred_list = net(datum)
seg_clas, mask_clas, b, seg_size = seg_mask_clas(seg_list, pred_list, datum)
image_list = [img.to(cuda0) for img in datum[0]]
image = interpolate(torch.stack(image_list), size = seg_size,
mode='bilinear',align_corners=False)
output_pred = dis_net(img = image.detach(), seg = seg_clas.detach())
output_grou = dis_net(img = image.detach(), seg = mask_clas.detach())
loss_dis = criterion_dis(input=output_grou,target=output_pred)
loss_dis.backward()
optimizer_dis.step()
optimizer_dis.zero_grad()
_ = [par.data.clamp_(-cfg.clip_value, cfg.clip_value) for par in dis_net.parameters()]
# ----- Generator part -----
# FIXME:
# print(f'dis time pass: {time.time()-present_time:.2f}')
# FIXME:
# present_time = time.time()
losses, seg_list, pred_list = net(datum)
seg_clas, mask_clas, b, seg_size = seg_mask_clas(seg_list, pred_list, datum)
image_list = [img.to(cuda0) for img in datum[0]]
image = interpolate(torch.stack(image_list), size = seg_size,
mode='bilinear',align_corners=False)
# GAN MaskRCNN
output_pred = dis_net(img = image, seg = seg_clas)
output_grou = dis_net(img = image, seg = mask_clas)
loss_gen = criterion_gen(input=output_grou,target=output_pred)
# since the dis is already freeze, the gradients will only
# record the YOLACT
losses = { k: (v).mean() for k,v in losses.items() } # Mean here because Dataparallel
loss = sum([losses[k] for k in losses])
loss += loss_gen
loss.backward()
# Do this to free up vram even if loss is not finite
optimizer_gen.zero_grad()
if torch.isfinite(loss).item():
# since the optimizer_gen is for YOLACT only
# only the gen will be updated
optimizer_gen.step()
# FIXME:
# print(f'gen time pass: {time.time()-present_time:.2f}')
# print('GAN part over')
else:
# ====== Normal YOLACT Train ======
# Zero the grad to get ready to compute gradients
optimizer_gen.zero_grad()
# Forward Pass + Compute loss at the same time (see CustomDataParallel and NetLoss)
losses = net(datum)
losses = { k: (v).mean() for k,v in losses.items() } # Mean here because Dataparallel
loss = sum([losses[k] for k in losses])
# no_inf_mean removes some components from the loss, so make sure to backward through all of it
# all_loss = sum([v.mean() for v in losses.values()])
# Backprop
loss.backward() # Do this to free up vram even if loss is not finite
if torch.isfinite(loss).item():
optimizer_gen.step()
# Add the loss to the moving average for bookkeeping
_ = [loss_avgs[k].add(losses[k].item()) for k in losses]
# for k in losses:
# loss_avgs[k].add(losses[k].item())
cur_time = time.time()
elapsed = cur_time - last_time
last_time = cur_time
# Exclude graph setup from the timing information
if iteration != args.start_iter:
time_avg.add(elapsed)
if iteration % 10 == 0:
eta_str = str(datetime.timedelta(seconds=(cfg.max_iter-iteration) * time_avg.get_avg())).split('.')[0]
total = sum([loss_avgs[k].get_avg() for k in losses])
loss_labels = sum([[k, loss_avgs[k].get_avg()] for k in loss_types if k in losses], [])
if cfg.pred_seg:
print(('[%3d] %7d ||' + (' %s: %.3f |' * len(losses)) + ' T: %.3f || ETA: %s || timer: %.3f')
% tuple([epoch, iteration] + loss_labels + [total, eta_str, elapsed]), flush=True)
# print(f'Generator loss: {loss_gen:.2f} | Discriminator loss: {loss_dis:.2f}')
# Loss Key:
# - B: Box Localization Loss
# - C: Class Confidence Loss
# - M: Mask Loss
# - P: Prototype Loss
# - D: Coefficient Diversity Loss
# - E: Class Existence Loss
# - S: Semantic Segmentation Loss
# - T: Total loss
if args.log:
precision = 5
loss_info = {k: round(losses[k].item(), precision) for k in losses}
loss_info['T'] = round(loss.item(), precision)
if args.log_gpu:
log.log_gpu_stats = (iteration % 10 == 0) # nvidia-smi is sloooow
log.log('train', loss=loss_info, epoch=epoch, iter=iteration,
lr=round(cur_lr, 10), elapsed=elapsed)
log.log_gpu_stats = args.log_gpu
iteration += 1
if iteration % args.save_interval == 0 and iteration != args.start_iter:
if args.keep_latest:
latest = SavePath.get_latest(args.save_folder, cfg.name)
print('Saving state, iter:', iteration)
yolact_net.save_weights(save_path(epoch, iteration))
if args.keep_latest and latest is not None:
if args.keep_latest_interval <= 0 or iteration % args.keep_latest_interval != args.save_interval:
print('Deleting old save...')
os.remove(latest)
# This is done per epoch
if args.validation_epoch > 0:
# NOTE: Validation loss
# if cfg.pred_seg:
# net.eval()
# dis_net.eval()
# cfg.gan_eval = True
# with torch.no_grad():
# for datum in tqdm(val_loader, desc='GAN Validation'):
# losses, seg_list, pred_list = net(datum)
# losses, seg_list, pred_list = net(datum)
# # TODO: warp below as a function
# seg_list = [v.permute(2,1,0).contiguous() for v in seg_list]
# b = len(seg_list) # batch size
# _, seg_h, seg_w = seg_list[0].size()
# seg_clas = torch.zeros(b, cfg.num_classes-1, seg_h, seg_w)
# mask_clas = torch.zeros(b, cfg.num_classes-1, seg_h, seg_w)
# target_list = [target for target in datum[1][0]]
# mask_list = [interpolate(mask.unsqueeze(0), size = (seg_h,seg_w),mode='bilinear', \
# align_corners=False).squeeze() for mask in datum[1][1]]
# for idx in range(b):
# for i, (pred, i_target) in enumerate(zip(pred_list[idx], target_list[idx])):
# seg_clas[idx, pred, ...] += seg_list[idx][i,...]
# mask_clas[idx, i_target[-1].long(), ...] += mask_list[idx][i,...]
# seg_clas = torch.clamp(seg_clas, 0, 1)
# image = interpolate(torch.stack(datum[0]), size = (seg_h,seg_w),
# mode='bilinear',align_corners=False)
# real_label = torch.ones(b)
# output_pred = dis_net(img = image, seg = seg_clas)
# output_grou = dis_net(img = image, seg = mask_clas)
# loss_pred = -criterion_dis(output_pred,target=real_label)
# loss_grou = criterion_dis(output_grou,target=real_label)
# loss_dis = loss_pred + loss_grou
# losses = { k: (v).mean() for k,v in losses.items() }
# loss = sum([losses[k] for k in losses])
# val_loss = loss - cfg.lambda_dis*loss_dis
# schedule_dis.step(loss_dis)
# lr = [group['lr'] for group in optimizer_dis.param_groups]
# print(f'Discriminator lr: {lr[0]}')
# net.train()
if epoch % args.validation_epoch == 0 and epoch > 0:
cfg.gan_eval = False
dis_net.eval()
compute_validation_map(epoch, iteration, yolact_net, val_dataset, log if args.log else None)
# Compute validation mAP after training is finished
compute_validation_map(epoch, iteration, yolact_net, val_dataset, log if args.log else None)
except KeyboardInterrupt:
if args.interrupt:
print('Stopping early. Saving network...')
# Delete previous copy of the interrupted network so we don't spam the weights folder
SavePath.remove_interrupt(args.save_folder)
yolact_net.save_weights(save_path(epoch, repr(iteration) + '_interrupt'))
exit()
yolact_net.save_weights(save_path(epoch, iteration))
def main(args, logger):
writer = SummaryWriter(args.subTensorboardDir)
model = Vgg().to(device)
trainSet = Lung(rootDir=args.dataDir, mode='train', size=args.inputSize)
valSet = Lung(rootDir=args.dataDir, mode='test', size=args.inputSize)
trainDataloader = DataLoader(trainSet,
batch_size=args.batchSize,
drop_last=True,
shuffle=True,
pin_memory=False,
num_workers=args.numWorkers)
valDataloader = DataLoader(valSet,
batch_size=args.valBatchSize,
drop_last=False,
shuffle=False,
pin_memory=False,
num_workers=args.numWorkers)
criterion = nn.CrossEntropyLoss()
optimizer = Ranger(model.parameters(), lr=args.lr)
model, optimizer = amp.initialize(model, optimizer, opt_level=args.apexType)
iter = 0
runningLoss = []
for epoch in range(args.epoch):
if epoch != 0 and epoch % args.evalFrequency == 0:
f1, acc = eval(model, valDataloader, logger)
writer.add_scalars('f1_acc', {'f1': f1,
'acc': acc}, iter)
if epoch != 0 and epoch % args.saveFrequency == 0:
modelName = osp.join(args.subModelDir, 'out_{}.pt'.format(epoch))
# 防止分布式训练保存失败
stateDict = model.modules.state_dict() if hasattr(model, 'module') else model.state_dict()
torch.save(stateDict, modelName)
checkpoint = {
'model': model.state_dict(),
'optimizer': optimizer.state_dict(),
'amp': amp.state_dict()
}
torch.save(checkpoint, modelName)
for img, lb, _ in trainDataloader:
# array = np.array(img)
# for i in range(array.shape[0]):
# plt.imshow(array[i, 0, ...], cmap='gray')
# plt.show()
iter += 1
img, lb = img.to(device), lb.to(device)
optimizer.zero_grad()
outputs = model(img)
loss = criterion(outputs.squeeze(), lb.long())
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
# loss.backward()
optimizer.step()
runningLoss.append(loss.item())
if iter % args.msgFrequency == 0:
avgLoss = np.mean(runningLoss)
runningLoss = []
lr = optimizer.param_groups[0]['lr']
logger.info(f'epoch: {epoch} / {args.epoch}, '
f'iter: {iter} / {len(trainDataloader) * args.epoch}, '
f'lr: {lr}, '
f'loss: {avgLoss:.4f}')
writer.add_scalar('loss', avgLoss, iter)
eval(model, valDataloader, logger)
modelName = osp.join(args.subModelDir, 'final.pth')
stateDict = model.modules.state_dict() if hasattr(model, 'module') else model.state_dict()
torch.save(stateDict, modelName)
#print(target.shape)
#print(inputx.shape)
output = model(inputs)
############################ 数据出口#########################################
############ 请将你的output数据重新转换成 bscwh格式进行下一步#################
#output = output.unsqueeze(2)
###############################################################################
#loss1 = criterionmse(output, targets)
#loss2 = criterionmae(output, targets)
print(targets.shape)
loss = criterionbmse(output, targets)
#loss3 = criteriongdl(output,target)
#loss = loss1+loss2
optimizer.zero_grad()
loss.backward()
losses.update(loss.item())
nn.utils.clip_grad_norm_(model.parameters(), args.grad_clip)
optimizer.step()
#t_rmse = rmse_loss(output, targets)
#rmse.update(t_rmse.item())
#output_np = np.clip(output.detach().cpu().numpy(), 0, 1)
#target_np = np.clip(targets.detach().cpu().numpy(), 0, 1)
logging.info('[{0}][{1}][{2}]\t'
'lr: {lr:.5f}\t'
'loss: {loss.val:.6f} ({loss.avg:.6f})'.format(
epoch,
headid,
ind,
vutils.save_image(lab, "%s/debugUnetLabel.png" % (savePath),
normalize=False)
print ("initial label",lab.sum(),lab.max(),lab.mean())
plt.figure(figsize=(12, 12))
sr=lab.view(-1)
sr=torch.sort(sr)[0]
print ("sr",sr.shape)
plt.plot(sr[-1000:].numpy())
plt.savefig("%s/labvalues_px%s_cr%s_BN%s.png" % (savePath, opt.imageSize, opt.imageCrop,str(opt.BN)))
plt.close()
#raise Exception
lab = lab.to(device).float() # not long but float...
opti.zero_grad()
pred = netD(im)
err = criterion(pred, lab)
err.backward()
opti.step()
buf.append(err.item())
for j in range(lab.shape[0]):##single element, 1 number per patch
if lab[j].sum()==0:
bufN.append(pred[j].max().item())
bufME.append(pred[j].mean().item())
else:
bufP.append(pred[j].max().item())
class Trainer(object):
"""
Trainer encapsulates all the logic necessary for
training the Recurrent Attention Model.
All hyperparameters are provided by the user in the
config file.
"""
def __init__(self, config, data_loader):
"""
Construct a new Trainer instance.
Args
----
- config: object containing command line arguments.
- data_loader: data iterator
"""
self.config = config
# glimpse network params
self.patch_size = config.patch_size
# core network params
self.num_glimpses = config.num_glimpses
self.hidden_size = config.hidden_size
# reinforce params
self.std = config.std
self.M = config.M
# data params
if config.is_train:
self.train_loader = data_loader[0]
self.valid_loader = data_loader[1]
image_tmp, _ = iter(self.train_loader).next()
self.image_size = (image_tmp.shape[2], image_tmp.shape[3])
if 'MNIST' in config.dataset_name or config.dataset_name == 'CIFAR':
self.num_train = len(self.train_loader.sampler.indices)
self.num_valid = len(self.valid_loader.sampler.indices)
elif config.dataset_name == 'ImageNet':
# the ImageNet cannot be sampled, otherwise this part will be wrong.
self.num_train = 100000 #len(train_dataset) in data_loader.py, wrong: len(self.train_loader)
self.num_valid = 10000 #len(self.valid_loader)
else:
self.test_loader = data_loader
self.num_test = len(self.test_loader.dataset)
image_tmp, _ = iter(self.test_loader).next()
self.image_size = (image_tmp.shape[2], image_tmp.shape[3])
# assign numer of channels and classes of images in this dataset, maybe there is more robust way
if 'MNIST' in config.dataset_name:
self.num_channels = 1
self.num_classes = 10
elif config.dataset_name == 'ImageNet':
self.num_channels = 3
self.num_classes = 1000
elif config.dataset_name == 'CIFAR':
self.num_channels = 3
self.num_classes = 10
# training params
self.epochs = config.epochs
self.start_epoch = 0
self.momentum = config.momentum
self.lr = config.init_lr
self.loss_fun_baseline = config.loss_fun_baseline
self.loss_fun_action = config.loss_fun_action
self.weight_decay = config.weight_decay
# misc params
self.use_gpu = config.use_gpu
self.best = config.best
self.ckpt_dir = config.ckpt_dir
self.logs_dir = config.logs_dir
self.best_valid_acc = 0.
self.best_train_acc = 0.
self.counter = 0
self.lr_patience = config.lr_patience
self.train_patience = config.train_patience
self.use_tensorboard = config.use_tensorboard
self.resume = config.resume
self.print_freq = config.print_freq
self.plot_freq = config.plot_freq
if config.use_gpu:
self.model_name = 'ram_gpu_{0}_{1}_{2}x{3}_{4}_{5:1.2f}_{6}'.format(
config.PBSarray_ID, config.num_glimpses, config.patch_size,
config.patch_size, config.hidden_size, config.std,
config.dropout)
else:
self.model_name = 'ram_{0}_{1}_{2}x{3}_{4}_{5:1.2f}_{6}'.format(
config.PBSarray_ID, config.num_glimpses, config.patch_size,
config.patch_size, config.hidden_size, config.std,
config.dropout)
self.plot_dir = './plots/' + self.model_name + '/'
if not os.path.exists(self.plot_dir):
os.makedirs(self.plot_dir, exist_ok=True)
# configure tensorboard logging
if self.use_tensorboard:
print('[*] Saving tensorboard logs to {}'.format(tensorboard_dir))
if not os.path.exists(tensorboard_dir):
os.makedirs(tensorboard_dir)
configure(tensorboard_dir)
writer = SummaryWriter(logs_dir=self.logs_dir + self.model_name)
# build DRAMBUTD model
self.model = RecurrentAttention(self.patch_size, self.num_channels,
self.image_size, self.std,
self.hidden_size, self.num_classes,
config)
if self.use_gpu:
self.model.cuda()
print('[*] Number of model parameters: {:,}'.format(
sum([p.data.nelement() for p in self.model.parameters()])))
# initialize optimizer and scheduler
if config.optimizer == 'SGD':
self.optimizer = optim.SGD(self.model.parameters(),
lr=self.lr,
momentum=self.momentum,
weight_decay=self.weight_decay)
elif config.optimizer == 'ReduceLROnPlateau':
self.scheduler = ReduceLROnPlateau(self.optimizer,
'min',
patience=self.lr_patience,
weight_decay=self.weight_decay)
elif config.optimizer == 'Adadelta':
self.optimizer = optim.Adadelta(self.model.parameters(),
weight_decay=self.weight_decay)
elif config.optimizer == 'Adam':
self.optimizer = optim.Adam(self.model.parameters(),
lr=3e-4,
weight_decay=self.weight_decay)
elif config.optimizer == 'AdaBound':
self.optimizer = adabound.AdaBound(self.model.parameters(),
lr=3e-4,
final_lr=0.1,
weight_decay=self.weight_decay)
elif config.optimizer == 'Ranger':
self.optimizer = Ranger(self.model.parameters(),
weight_decay=self.weight_decay)
def reset(self, x, SM):
"""
Initialize the hidden state of the core network
and the location vector.
This is called once every time a new minibatch
`x` is introduced.
"""
dtype = (torch.cuda.FloatTensor if self.use_gpu else torch.FloatTensor)
#
h_t2, l_t, SM_local_smooth = self.model.initialize(x, SM)
# initialize hidden state 1 as 0 vector to avoid the directly classification from context
h_t1 = torch.zeros(self.batch_size, self.hidden_size).type(dtype)
cell_state1 = torch.zeros(self.batch_size,
self.hidden_size).type(dtype)
cell_state2 = torch.zeros(self.batch_size,
self.hidden_size).type(dtype)
return h_t1, h_t2, l_t, cell_state1, cell_state2, SM_local_smooth
def train(self):
"""
Train the model on the training set.
A checkpoint of the model is saved after each epoch
and if the validation accuracy is improved upon,
a separate ckpt is created for use on the test set.
"""
# load the most recent checkpoint
if self.resume:
self.load_checkpoint(best=False)
print("\n[*] Train on {} samples, validate on {} samples".format(
self.num_train, self.num_valid))
for epoch in range(self.start_epoch, self.epochs):
print('\nEpoch: {}/{} - LR: {:.6f}'.format(epoch + 1, self.epochs,
self.lr))
# train for 1 epoch
train_loss, train_acc = self.train_one_epoch(epoch)
# evaluate on validation set
valid_loss, valid_acc = self.validate(epoch)
# # reduce lr if validation loss plateaus
# self.scheduler.step(valid_loss)
is_best_valid = valid_acc > self.best_valid_acc
is_best_train = train_acc > self.best_train_acc
msg1 = "train loss: {:.3f} - train acc: {:.3f} "
msg2 = "- val loss: {:.3f} - val acc: {:.3f}"
if is_best_train:
msg1 += " [*]"
if is_best_valid:
self.counter = 0
msg2 += " [*]"
msg = msg1 + msg2
print(msg.format(train_loss, train_acc, valid_loss, valid_acc))
# check for improvement
if not is_best_valid:
self.counter += 1
if self.counter > self.train_patience:
print("[!] No improvement in a while, stopping training.")
return
self.best_valid_acc = max(valid_acc, self.best_valid_acc)
self.best_train_acc = max(train_acc, self.best_train_acc)
self.save_checkpoint(
{
'epoch': epoch + 1,
'model_state': self.model.state_dict(),
'optim_state': self.optimizer.state_dict(),
'best_valid_acc': self.best_valid_acc,
'best_train_acc': self.best_train_acc,
}, is_best_valid)
def train_one_epoch(self, epoch):
"""
Train the model for 1 epoch of the training set.
An epoch corresponds to one full pass through the entire
training set in successive mini-batches.
This is used by train() and should not be called manually.
"""
batch_time = AverageMeter()
losses = AverageMeter()
accs = AverageMeter()
tic = time.time()
with tqdm(total=self.num_train) as pbar:
for i, (x_raw, y) in enumerate(self.train_loader):
#
if self.use_gpu:
x_raw, y = x_raw.cuda(), y.cuda()
# detach images and their saliency maps
x = x_raw[:, 0, ...].unsqueeze(1)
SM = x_raw[:, 1, ...].unsqueeze(1)
plot = False
if (epoch % self.plot_freq == 0) and (i == 0):
plot = True
# initialize location vector and hidden state
self.batch_size = x.shape[0]
h_t1, h_t2, l_t, cell_state1, cell_state2, SM_local_smooth = self.reset(
x, SM)
# save images
imgs = []
imgs.append(x[0:9])
# extract the glimpses
locs = []
log_pi = []
baselines = []
for t in range(self.num_glimpses - 1):
# forward pass through model
h_t1, h_t2, l_t, b_t, p, cell_state1, cell_state2, SM_local_smooth = self.model(
x, l_t, h_t1, h_t2, cell_state1, cell_state2, SM,
SM_local_smooth)
# store
locs.append(l_t[0:9])
baselines.append(b_t)
log_pi.append(p)
# last iteration
h_t1, h_t2, l_t, b_t, log_probas, p, cell_state1, cell_state2, SM_local_smooth = self.model(
x,
l_t,
h_t1,
h_t2,
cell_state1,
cell_state2,
SM,
SM_local_smooth,
last=True)
log_pi.append(p)
baselines.append(b_t)
locs.append(l_t[0:9])
# convert list to tensors and reshape
baselines = torch.stack(baselines).transpose(1, 0)
log_pi = torch.stack(log_pi).transpose(1, 0)
# calculate reward
predicted = torch.max(log_probas, 1)[1]
if self.loss_fun_baseline == 'cross_entropy':
# cross_entroy_loss need a long, batch x 1 tensor as target but R
# also need to be subtracted by the baseline whose size is N x num_glimpse
R = (predicted.detach() == y).long()
# compute losses for differentiable modules
loss_action, loss_baseline = self.choose_loss_fun(
log_probas, y, baselines, R)
R = R.float().unsqueeze(1).repeat(1, self.num_glimpses)
else:
R = (predicted.detach() == y).float()
R = R.unsqueeze(1).repeat(1, self.num_glimpses)
# compute losses for differentiable modules
loss_action, loss_baseline = self.choose_loss_fun(
log_probas, y, baselines, R)
# loss_action = F.nll_loss(log_probas, y)
# loss_baseline = F.mse_loss(baselines, R)
# compute reinforce loss
# summed over timesteps and averaged across batch
adjusted_reward = R - baselines.detach()
loss_reinforce = torch.sum(-log_pi * adjusted_reward, dim=1)
loss_reinforce = torch.mean(loss_reinforce, dim=0)
# sum up into a hybrid loss
loss = loss_action + loss_baseline + loss_reinforce
# compute accuracy
correct = (predicted == y).float()
acc = 100 * (correct.sum() / len(y))
# store
#losses.update(loss.data[0], x.size()[0])
#accs.update(acc.data[0], x.size()[0])
losses.update(loss.data.item(), x.size()[0])
accs.update(acc.data.item(), x.size()[0])
# compute gradients and update SGD
self.optimizer.zero_grad()
loss.backward()
self.optimizer.step()
# measure elapsed time
toc = time.time()
batch_time.update(toc - tic)
pbar.set_description(
("{:.1f}s - loss: {:.3f} - acc: {:.3f}".format(
(toc - tic), loss.data.item(), acc.data.item())))
pbar.update(self.batch_size)
# dump the glimpses and locs
if plot:
if self.use_gpu:
imgs = [g.cpu().data.numpy().squeeze() for g in imgs]
locs = [l.cpu().data.numpy() for l in locs]
else:
imgs = [g.data.numpy().squeeze() for g in imgs]
locs = [l.data.numpy() for l in locs]
pickle.dump(
imgs,
open(self.plot_dir + "g_{}.p".format(epoch + 1), "wb"))
pickle.dump(
locs,
open(self.plot_dir + "l_{}.p".format(epoch + 1), "wb"))
sio.savemat(self.plot_dir +
"data_train_{}.mat".format(epoch + 1),
mdict={
'location': locs,
'patch': imgs
})
# log to tensorboard
if self.use_tensorboard:
iteration = epoch * len(self.train_loader) + i
writer.add_scalar('Loss/train', losses, iteration)
writer.add_scalar('Accuracy/train', accs, iteration)
return losses.avg, accs.avg
def validate(self, epoch):
"""
Evaluate the model on the validation set.
"""
losses = AverageMeter()
accs = AverageMeter()
for i, (x_raw, y) in enumerate(self.valid_loader):
if self.use_gpu:
x_raw, y = x_raw.cuda(), y.cuda()
# detach images and their saliency maps
x = x_raw[:, 0, ...].unsqueeze(1)
SM = x_raw[:, 1, ...].unsqueeze(1)
# duplicate M times
x = x.repeat(self.M, 1, 1, 1)
SM = SM.repeat(self.M, 1, 1, 1)
# initialize location vector and hidden state
self.batch_size = x.shape[0]
h_t1, h_t2, l_t, cell_state1, cell_state2, SM_local_smooth = self.reset(
x, SM)
# extract the glimpses
log_pi = []
baselines = []
for t in range(self.num_glimpses - 1):
# forward pass through model
h_t1, h_t2, l_t, b_t, p, cell_state1, cell_state2, SM_local_smooth = self.model(
x, l_t, h_t1, h_t2, cell_state1, cell_state2, SM,
SM_local_smooth)
# store
baselines.append(b_t)
log_pi.append(p)
# last iteration
h_t1, h_t2, l_t, b_t, log_probas, p, cell_state1, cell_state2, SM_local_smooth = self.model(
x,
l_t,
h_t1,
h_t2,
cell_state1,
cell_state2,
SM,
SM_local_smooth,
last=True)
# store
log_pi.append(p)
baselines.append(b_t)
# convert list to tensors and reshape
baselines = torch.stack(baselines).transpose(1, 0)
log_pi = torch.stack(log_pi).transpose(1, 0)
# average
log_probas = log_probas.view(self.M, -1, log_probas.shape[-1])
log_probas = torch.mean(log_probas, dim=0)
baselines = baselines.contiguous().view(self.M, -1,
baselines.shape[-1])
baselines = torch.mean(baselines, dim=0)
log_pi = log_pi.contiguous().view(self.M, -1, log_pi.shape[-1])
log_pi = torch.mean(log_pi, dim=0)
# calculate reward
predicted = torch.max(log_probas, 1)[1]
if self.loss_fun_baseline == 'cross_entropy':
# cross_entroy_loss need a long, batch x 1 tensor as target but R
# also need to be subtracted by the baseline whose size is N x num_glimpse
R = (predicted.detach() == y).long()
# compute losses for differentiable modules
loss_action, loss_baseline = self.choose_loss_fun(
log_probas, y, baselines, R)
R = R.float().unsqueeze(1).repeat(1, self.num_glimpses)
else:
R = (predicted.detach() == y).float()
R = R.unsqueeze(1).repeat(1, self.num_glimpses)
# compute losses for differentiable modules
loss_action, loss_baseline = self.choose_loss_fun(
log_probas, y, baselines, R)
# compute losses for differentiable modules
# loss_action = F.nll_loss(log_probas, y)
# loss_baseline = F.mse_loss(baselines, R)
# compute reinforce loss
adjusted_reward = R - baselines.detach()
loss_reinforce = torch.sum(-log_pi * adjusted_reward, dim=1)
loss_reinforce = torch.mean(loss_reinforce, dim=0)
# sum up into a hybrid loss
loss = loss_action + loss_baseline + loss_reinforce
# compute accuracy
correct = (predicted == y).float()
acc = 100 * (correct.sum() / len(y))
# store
losses.update(loss.data.item(), x.size()[0])
accs.update(acc.data.item(), x.size()[0])
# log to tensorboard
if self.use_tensorboard:
iteration = epoch * len(self.valid_loader) + i
writer.add_scalar('Accuracy/valid', accs, iteration)
writer.add_scalar('Loss/valid', losses, iteration)
return losses.avg, accs.avg
def choose_loss_fun(self, log_probas, y, baselines, R):
"""
use disctionary to save function handle
replacement of swith-case
be careful of the argument data type and shape!!!
"""
loss_fun_pool = {
'mse': F.mse_loss,
'l1': F.l1_loss,
'nll': F.nll_loss,
'smooth_l1': F.smooth_l1_loss,
'kl_div': F.kl_div,
'cross_entropy': F.cross_entropy
}
return loss_fun_pool[self.loss_fun_action](
log_probas, y), loss_fun_pool[self.loss_fun_baseline](baselines, R)
def test(self):
"""
Test the model on the held-out test data.
This function should only be called at the very
end once the model has finished training.
"""
correct = 0
# load the best checkpoint
self.load_checkpoint(best=self.best)
for i, (x, y) in enumerate(self.test_loader):
if self.use_gpu:
x, y = x.cuda(), y.cuda()
x, y = Variable(x, volatile=True), Variable(y)
# duplicate 10 times
x = x.repeat(self.M, 1, 1, 1)
# initialize location vector and hidden state
self.batch_size = x.shape[0]
h_t1, h_t2, l_t, cell_state1, cell_state2, SM_local_smooth = self.reset(
x, SM)
# save images and glimpse location
locs = []
imgs = []
imgs.append(x[0:9])
for t in range(self.num_glimpses - 1):
# forward pass through model
h_t1, h_t2, l_t, b_t, p, cell_state1, cell_state2, SM_local_smooth = self.model(
x, l_t, h_t1, h_t2, cell_state1, cell_state2, SM,
SM_local_smooth)
# store
locs.append(l_t[0:9])
baselines.append(b_t)
log_pi.append(p)
# last iteration
h_t1, h_t2, l_t, b_t, log_probas, p, cell_state1, cell_state2, SM_local_smooth = self.model(
x,
l_t,
h_t1,
h_t2,
cell_state1,
cell_state2,
SM,
SM_local_smooth,
last=True)
log_probas = log_probas.view(self.M, -1, log_probas.shape[-1])
log_probas = torch.mean(log_probas, dim=0)
pred = log_probas.data.max(1, keepdim=True)[1]
correct += pred.eq(y.data.view_as(pred)).cpu().sum()
# dump test data
if self.use_gpu:
imgs = [g.cpu().data.numpy().squeeze() for g in imgs]
locs = [l.cpu().data.numpy() for l in locs]
else:
imgs = [g.data.numpy().squeeze() for g in imgs]
locs = [l.data.numpy() for l in locs]
pickle.dump(imgs, open(self.plot_dir + "g_test.p", "wb"))
pickle.dump(locs, open(self.plot_dir + "l_test.p", "wb"))
sio.savemat(self.plot_dir + "test_transient.mat",
mdict={'location': locs})
perc = (100. * correct) / (self.num_test)
error = 100 - perc
print('[*] Test Acc: {}/{} ({:.2f}% - {:.2f}%)'.format(
correct, self.num_test, perc, error))
def save_checkpoint(self, state, is_best):
"""
Save a copy of the model so that it can be loaded at a future
date. This function is used when the model is being evaluated
on the test data.
If this model has reached the best validation accuracy thus
far, a seperate file with the suffix `best` is created.
"""
# print("[*] Saving model to {}".format(self.ckpt_dir))
filename = self.model_name + '_ckpt.pth.tar'
ckpt_path = os.path.join(self.ckpt_dir, filename)
torch.save(state, ckpt_path)
if is_best:
filename = self.model_name + '_model_best.pth.tar'
shutil.copyfile(ckpt_path, os.path.join(self.ckpt_dir, filename))
def load_checkpoint(self, best=False):
"""
Load the best copy of a model. This is useful for 2 cases:
- Resuming training with the most recent model checkpoint.
- Loading the best validation model to evaluate on the test data.
Params
------
- best: if set to True, loads the best model. Use this if you want
to evaluate your model on the test data. Else, set to False in
which case the most recent version of the checkpoint is used.
"""
print("[*] Loading model from {}".format(self.ckpt_dir))
filename = self.model_name + '_ckpt.pth.tar'
if best:
filename = self.model_name + '_model_best.pth.tar'
ckpt_path = os.path.join(self.ckpt_dir, filename)
ckpt = torch.load(ckpt_path)
# load variables from checkpoint
self.start_epoch = ckpt['epoch']
self.best_valid_acc = ckpt['best_valid_acc']
self.model.load_state_dict(ckpt['model_state'])
self.optimizer.load_state_dict(ckpt['optim_state'])
if best:
print("[*] Loaded {} checkpoint @ epoch {} "
"with best valid acc of {:.3f}".format(
filename, ckpt['epoch'], ckpt['best_valid_acc']))
else:
print("[*] Loaded {} checkpoint @ epoch {}".format(
filename, ckpt['epoch']))
def train(model,
dataset,
val_X,
val_y,
batch_size=512,
epochs=500,
epoch_show=1,
weight_decay=1e-5,
momentum=0.9):
train_loader = DataLoader(dataset=dataset,
batch_size=batch_size,
shuffle=True,
num_workers=0)
optimizer = Ranger(model.parameters(), weight_decay=weight_decay)
# optimizer = optim.Adam(model.parameters(), weight_decay=weight_decay)
# optimizer = optim.SGD(model.parameters(), lr=0.1, momentum=momentum, weight_decay=weight_decay)
# min_lr = 1e-4
# scheduler = optim.lr_scheduler.ReduceLROnPlateau(optimizer,
# mode='min',
# factor=0.1,
# patience=10,
# threshold=0,
# min_lr=min_lr,
# verbose=True)
loss_fn = nn.MSELoss(reduction='mean')
writer = SummaryWriter(
'runs/batchSize/linear_hidden={}_neurons={}_{}_batch={:04d}_bn={}_p={:.1f}_mom={}_l2={}'
.format(
len(model.features) - 1, model.features[-1],
model.activation_fn_name, batch_size, model.bn, model.p, momentum,
weight_decay))
best_val_mape = 100
for epoch in range(epochs):
# if get_lr(optimizer) < 2 * min_lr:
# break
model.train()
loss_epoch = 0
for i, data in enumerate(train_loader, 0):
x, y = data
out = model(x)
loss_iter = loss_fn(y, out.squeeze())
optimizer.zero_grad()
loss_iter.backward()
optimizer.step()
loss_epoch += loss_iter
if epoch % epoch_show == 0 or epoch == epochs - 1:
with torch.no_grad():
model.eval()
pred = model(val_X)
loss_val = loss_fn(val_y, pred.squeeze())
mape = mean_absolute_percentage_error(val_y, pred.squeeze())
# scheduler.step(best_val_mape)
print(
'\nEpoch {:03d}: loss_train={:.6f}, loss_val={:.6f}, val_mape={:.4f}, '
'best_val_mape={:.4f}'.format(epoch, loss_epoch / (i + 1),
loss_val, mape,
best_val_mape),
end=' ')
if mape < best_val_mape:
model_name = 'running_best_model.pt'
print(
'Val_mape improved from {:.4f} to {:.4f}, saving model to {}'
.format(best_val_mape, mape, model_name),
end=' ')
best_val_mape = mape
torch.save(model.state_dict(), 'models/' + model_name)
writer.add_scalar("loss/train", loss_epoch / (i + 1), epoch)
writer.add_scalar("loss/val", loss_val, epoch)
writer.add_scalar("mape/val", mape, epoch)
torch.save(model.state_dict(), 'models/final_model.pt')
writer.add_scalar("mape/best_val", best_val_mape)
return writer
class Brain(object):
"""
High-level model logic and tuning nuggets encapsulated.
Based on efficientNet: https://arxiv.org/abs/1905.11946
fine tuning the efficientnet for classification and object detection
in this implementation, no weights are frozen
ideally, batchnorm layers can be frozen for marginal training speed increase
"""
def __init__(self, gradient_accum_steps=5, lr=0.0005, epochs=100, n_class=2, lmb=30):
self.device = self.set_cuda_device()
self.net = EFN_Classifier("tf_efficientnet_b1_ns", n_class).to(self.device)
self.loss_function = nn.MSELoss()
self.clf_loss_function = nn.CrossEntropyLoss()
self.optimizer = Ranger(self.net.parameters(), lr=lr, weight_decay=0.999, betas=(0.9, 0.999))
self.scheduler = CosineAnnealingLR(self.optimizer, epochs * 0.5, lr * 0.0001)
self.scheduler.last_epoch = epochs
self.scaler = GradScaler()
self.epochs = epochs
self.gradient_accum_steps = gradient_accum_steps
self.lmb = lmb
@staticmethod
def set_cuda_device():
if torch.cuda.is_available():
device = torch.device("cuda:0")
logging.info(f"Running on {torch.cuda.get_device_name()}")
else:
device = torch.device("cpu")
logging.info("Running on a CPU")
return device
def run_training_loop(self, train_dataloader, valid_dataloader, model_filename):
best_loss = float("inf")
for epoch in range(self.epochs):
if epoch != 0 and epoch > 0.5 * self.epochs: # cosine anneal the last 50% of epochs
self.scheduler.step()
logging.info(f"Epoch {epoch+1}")
logging.info("Training")
train_losses, train_accuracies, train_miou = self.forward_pass(train_dataloader, train=True)
logging.info("Validating")
val_losses, val_accuracies, val_miou = self.forward_pass(valid_dataloader)
logging.info(
f"Training accuracy: {sum(train_accuracies)/len(train_accuracies):.2f}"
f" | Training loss: {sum(train_losses)/len(train_losses):.2f}"
f" | Training mIoU: {sum(train_miou)/len(train_miou):.2f}"
)
logging.info(
f"Validation accuracy: {sum(val_accuracies)/len(val_accuracies):.2f}"
f" | Validation loss: {sum(val_losses)/len(val_losses):.2f}"
f" | Validation mIoU: {sum(val_miou)/len(val_miou):.2f}"
)
epoch_val_loss = sum(val_losses) / len(val_losses)
if best_loss > epoch_val_loss:
best_loss = epoch_val_loss
torch.save(self.net.state_dict(), model_filename)
logging.info(f"Saving with loss of {epoch_val_loss}, improved over previous {best_loss}")
def bbox_iou(self, true_boxes, pred_boxes):
iou_list = []
for true_box, pred_box in zip(true_boxes, pred_boxes):
x_left = max(true_box[0], pred_box[0]).item()
y_top = max(true_box[1], pred_box[1]).item()
x_right = min(true_box[2], pred_box[2]).item()
y_bottom = min(true_box[3], pred_box[3]).item()
if x_right < x_left or y_bottom < y_top:
return 0.0
overlap = (x_right - x_left) * (y_bottom - y_top)
true_box_area = (true_box[2] - true_box[0]) * (true_box[3] - true_box[1])
pred_box_area = (pred_box[2] - pred_box[0]) * (pred_box[3] - pred_box[1])
iou = overlap / float(true_box_area + pred_box_area - overlap)
iou_list.append(iou)
iou = torch.tensor(iou)
iou = torch.mean(iou)
return iou
def draw_boxes(self, images, bboxes, labels):
label_dict = {0: "Cat", 1: "Dog"}
for batch in zip(images, bboxes, labels):
cv2.destroyAllWindows()
image, bbox, label = batch[0].cpu().numpy(), batch[1].cpu().numpy(), torch.argmax(batch[2]).cpu().item()
image = np.rollaxis(image, 0, 3)
image = ((image - image.min()) * (1 / (image.max() - image.min()) * 255)).astype("uint8")
image = cv2.UMat(image)
cv2.rectangle(image, (bbox[0], bbox[1]), (bbox[2], bbox[3]), (0, 255, 0), thickness=2)
cv2.putText(
image,
f"{label_dict[label]}",
(bbox[1], bbox[3]),
cv2.FONT_HERSHEY_SIMPLEX,
0.5,
(0, 255, 0),
1,
cv2.LINE_AA,
)
cv2.imshow("test", image)
cv2.waitKey(1)
sleep(1)
cv2.destroyAllWindows()
def forward_pass(self, dataloader, draw=False, train=False):
def get_loss(inputs, bbox_labels, clf_labels):
label_outputs, bbox_outputs = self.net(inputs)
bbox_loss = self.loss_function(bbox_outputs, bbox_labels)
clf_loss = self.clf_loss_function(label_outputs, clf_labels)
loss = torch.mean(bbox_loss + clf_loss * self.lmb)
return loss, label_outputs, bbox_outputs
if train:
self.net.train()
else:
self.net.eval()
losses = []
accuracies = []
miou = []
for step, batch in enumerate(dataloader):
inputs = batch[0].to(self.device).float()
labels = batch[1].to(self.device).float()
# splitting labels for separate loss calculation
bbox_labels = labels[:, :4]
clf_labels = labels[:, 4:].long()
clf_labels = clf_labels[:, 0]
with autocast():
if train:
loss, label_outputs, bbox_outputs = get_loss(inputs, bbox_labels, clf_labels)
self.scaler.scale(loss).backward()
else:
with torch.no_grad():
loss, label_outputs, bbox_outputs = get_loss(inputs, bbox_labels, clf_labels)
if draw:
self.draw_boxes(inputs, bbox_outputs, label_outputs)
matches = [torch.argmax(i) == j for i, j in zip(label_outputs, clf_labels)]
acc = matches.count(True) / len(matches)
iou = self.bbox_iou(bbox_labels, bbox_outputs)
miou.append(iou)
losses.append(loss)
accuracies.append(acc)
if train and (step + 1) % self.gradient_accum_steps == 0:
# gradient accumulation to train with bigger effective batch size
# with less memory use
# fp16 is used to speed up training and reduce memory consumption
self.scaler.step(self.optimizer)
self.scaler.update()
self.optimizer.zero_grad()
logging.info(
f"Step {step} of {len(dataloader)},\t"
f"Accuracy: {sum(accuracies)/len(accuracies):.2f},\t"
f"mIoU: {sum(miou)/len(miou):.2f},\t"
f"Loss: {sum(losses)/len(losses):.2f}"
)
return losses, accuracies, miou
def train_generator_PG(dis, dis_option_encoder, state_encoder, reason_decoder, gen_optimizer, epochs, beta = 15, max_length = 25):
"""
The generator is trained using policy gradients, using the reward from the discriminator.
Training is done for num_batches batches.
"""
gen_optimizer = Ranger(itertools.chain(state_encoder.parameters(), reason_decoder.parameters()), lr=1e-3,
weight_decay=1e-4)
for epoch in tqdm(range(epochs)):
sys.stdout.flush()
total_mle_loss = 0
total_label_loss = 0
total_acc = 0
count = 0
for train_data in train_loader_adv:
loss = 0
gen_optimizer.zero_grad()
mle_loss = 0
label_loss = 0
num, statement, reason, label, options = train_data
reason = torch.tensor(reason).type(torch.cuda.LongTensor)
batch_size, input_size = statement.size()
state_input_lengths = [len(x) for x in statement]
falselabel = [[0, 1, 2] for l in label]
for i in range(len(label)): falselabel[i].remove(label[i])
choice_label = [random.choice(ls) for ls in falselabel]
input_lengths = [len(x) for x in statement]
encoder_outputs, hidden = state_encoder(statement, input_lengths)
decoder_input = torch.tensor([[word_encoder.encode("<sos>")] for i in range(batch_size)]).type(
torch.cuda.LongTensor)
encoder_outputs = encoder_outputs.permute(1, 0, 2) # -> (T*B*H)
target_length = reason.size()[1]
criterion = nn.NLLLoss()
decoder_outputs = [[] for i in range(batch_size)]
eos_idx = word_encoder.encode("<eos>")
reason_permute = reason.permute(1, 0)
for di in range(max_length):
output, hidden = reason_decoder(decoder_input, hidden, encoder_outputs)
if di < target_length:
mle_loss += criterion(output, reason_permute[di])
topv, topi = output.topk(1)
all_end = True
for i in range(batch_size):
# print(topi.squeeze()[i].item())
if topi.squeeze()[i].item() != eos_idx:
decoder_outputs[i].append(word_encoder.decode(np.array([topi.squeeze()[i].item()])))
all_end = False
if all_end:
break
decoder_input = topi.squeeze().detach()
origin_decoder_outputs = decoder_outputs
decoder_outputs = [" ".join(output) for output in decoder_outputs]
correct_option = ["<sep>".join(options[label[i]][i]) for i in range(batch_size)]
correct_option = [word_encoder.encode(option) for option in correct_option]
for i in range(batch_size):
options[choice_label[i]][i][1] = decoder_outputs[i]
option_input_lengths = [[len(x) for x in option] for option in options]
option_lens = [max(len(option[0]) + len(option[1]) + 1 for option in options[i]) for i in range(3)]
options = [[word_encoder.encode("<sep>".join([x[0], x[1]])) for x in option] for option in options]
options = [sequence.pad_sequences(option, maxlen=option_len, padding='post') for option, option_len in
zip(options, option_lens)]
options = [torch.tensor(option).type(torch.cuda.LongTensor) for option in options]
option_hiddens = []
for i in range(3):
encoder_outputs, option_hidden = dis_option_encoder(options[i], option_input_lengths[i])
option_hiddens.append(option_hidden)
out = dis(batch_size, option_hiddens)
for i in range(batch_size):
for j in range(min(len(origin_decoder_outputs[i]),correct_option[i].size()[0])):
false_one_hot = torch.zeros(1,3)
false_one_hot[0][falselabel[i]] = 1
false_one_hot = false_one_hot.type(torch.cuda.FloatTensor)
label_loss -= beta * out[i].mul(false_one_hot).sum()
total_label_loss += label_loss
total_mle_loss += mle_loss
loss = label_loss + mle_loss
loss.backward()
gen_optimizer.step()
count += 1
total_mle_loss = total_mle_loss / (count * BATCH_SIZE)
total_label_loss = total_label_loss / (count * BATCH_SIZE)
print('\n average_train_NLL = ', total_mle_loss,' the label loss = ', total_label_loss)
def train_fold():
#get arguments
opts=get_args()
#gpu selection
os.environ["CUDA_VISIBLE_DEVICES"] = opts.gpu_id
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
#instantiate datasets
json_path=os.path.join(opts.path,'train.json')
json=pd.read_json(json_path,lines=True)
json=json[json.signal_to_noise > opts.noise_filter]
ids=np.asarray(json.id.to_list())
error_weights=get_errors(json)
error_weights=opts.error_alpha+np.exp(-error_weights*opts.error_beta)
train_indices,val_indices=get_train_val_indices(json,opts.fold,SEED=2020,nfolds=opts.nfolds)
_,labels=get_data(json)
sequences=np.asarray(json.sequence)
train_seqs=sequences[train_indices]
val_seqs=sequences[val_indices]
train_labels=labels[train_indices]
val_labels=labels[val_indices]
train_ids=ids[train_indices]
val_ids=ids[val_indices]
train_ew=error_weights[train_indices]
val_ew=error_weights[val_indices]
#train_inputs=np.stack([train_inputs],0)
#val_inputs=np.stack([val_inputs,val_inputs2],0)
dataset=RNADataset(train_seqs,train_labels,train_ids, train_ew, opts.path)
val_dataset=RNADataset(val_seqs,val_labels, val_ids, val_ew, opts.path, training=False)
dataloader = DataLoader(dataset, batch_size=opts.batch_size,
shuffle=True, num_workers=opts.workers)
val_dataloader = DataLoader(val_dataset, batch_size=opts.batch_size*2,
shuffle=False, num_workers=opts.workers)
# print(dataset.data.shape)
# print(dataset.bpps[0].shape)
# exit()
#checkpointing
checkpoints_folder='checkpoints_fold{}'.format((opts.fold))
csv_file='log_fold{}.csv'.format((opts.fold))
columns=['epoch','train_loss',
'val_loss']
logger=CSVLogger(columns,csv_file)
#build model and logger
model=NucleicTransformer(opts.ntoken, opts.nclass, opts.ninp, opts.nhead, opts.nhid,
opts.nlayers, opts.kmer_aggregation, kmers=opts.kmers,stride=opts.stride,
dropout=opts.dropout).to(device)
optimizer=Ranger(model.parameters(), weight_decay=opts.weight_decay)
criterion=weighted_MCRMSE
#lr_schedule=lr_AIAYN(optimizer,opts.ninp,opts.warmup_steps,opts.lr_scale)
# Mixed precision initialization
opt_level = 'O1'
#model, optimizer = amp.initialize(model, optimizer, opt_level=opt_level)
model = nn.DataParallel(model)
pretrained_df=pd.read_csv('pretrain.csv')
#print(pretrained_df.epoch[-1])
model.load_state_dict(torch.load('pretrain_weights/epoch{}.ckpt'.format(int(pretrained_df.iloc[-1].epoch))))
pytorch_total_params = sum(p.numel() for p in model.parameters())
print('Total number of paramters: {}'.format(pytorch_total_params))
#distance_mask=get_distance_mask(107)
#distance_mask=torch.tensor(distance_mask).float().to(device).reshape(1,107,107)
#print("Starting training for fold {}/{}".format(opts.fold,opts.nfolds))
#training loop
cos_epoch=int(opts.epochs*0.75)-1
lr_schedule=torch.optim.lr_scheduler.CosineAnnealingLR(optimizer,(opts.epochs-cos_epoch)*len(dataloader))
for epoch in range(opts.epochs):
model.train(True)
t=time.time()
total_loss=0
optimizer.zero_grad()
train_preds=[]
ground_truths=[]
step=0
for data in dataloader:
#for step in range(1):
step+=1
#lr=lr_schedule.step()
lr=get_lr(optimizer)
#print(lr)
src=data['data'].to(device)
labels=data['labels']
bpps=data['bpp'].to(device)
#print(bpps.shape[1])
# bpp_selection=np.random.randint(bpps.shape[1])
# bpps=bpps[:,bpp_selection]
# src=src[:,bpp_selection]
# print(bpps.shape)
# print(src.shape)
# exit()
# print(bpps.shape)
# exit()
#src=mutate_rna_input(src,opts.nmute)
#src=src.long()[:,np.random.randint(2)]
labels=labels.to(device)#.float()
output=model(src,bpps)
ew=data['ew'].to(device)
#print(output.shape)
#print(labels.shape)
loss=criterion(output[:,:68],labels,ew).mean()
# with amp.scale_loss(loss, optimizer) as scaled_loss:
# scaled_loss.backward()
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), 1)
optimizer.step()
optimizer.zero_grad()
total_loss+=loss
print ("Epoch [{}/{}], Step [{}/{}] Loss: {:.3f} Lr:{:.6f} Time: {:.1f}"
.format(epoch+1, opts.epochs, step+1, len(dataloader), total_loss/(step+1) , lr,time.time()-t),end='\r',flush=True) #total_loss/(step+1)
#break
if epoch > cos_epoch:
lr_schedule.step()
print('')
train_loss=total_loss/(step+1)
#recon_acc=np.sum(recon_preds==true_seqs)/len(recon_preds)
torch.cuda.empty_cache()
if (epoch+1)%opts.val_freq==0 and epoch > cos_epoch:
#if (epoch+1)%opts.val_freq==0:
val_loss=validate(model,device,val_dataloader,batch_size=opts.batch_size)
to_log=[epoch+1,train_loss,val_loss,]
logger.log(to_log)
if (epoch+1)%opts.save_freq==0:
save_weights(model,optimizer,epoch,checkpoints_folder)
# if epoch == cos_epoch:
# print('yes')
get_best_weights_from_fold(opts.fold)
def train(fold_idx=None):
# model = UNet(n_classes=1, n_channels=3)
model = DeepLabV3_plus(num_classes=1, backbone='resnet', sync_bn=True)
train_dataloader, valid_dataloader = get_trainval_dataloader()
criterion = nn.BCEWithLogitsLoss()
optimizer = Ranger(model.parameters(), lr=1e-3, weight_decay=0.0005)
scheduler_cosine = torch.optim.lr_scheduler.CosineAnnealingLR(optimizer,
T_max=10)
best_val_score = 0
last_improved_epoch = 0
if fold_idx is None:
print('start')
model_save_path = os.path.join(config.dir_weight,
'{}.bin'.format(config.save_model_name))
else:
print('start fold: {}'.format(fold_idx + 1))
model_save_path = os.path.join(
config.dir_weight, '{}_fold{}.bin'.format(config.save_model_name,
fold_idx))
for cur_epoch in range(config.num_epochs):
start_time = int(time.time())
model.train()
print('epoch: ', cur_epoch + 1)
cur_step = 0
for batch in train_dataloader:
batch_x = batch['image']
batch_y = batch['mask']
batch_x, batch_y = batch_x.to(device), batch_y.to(device)
optimizer.zero_grad()
mask_pred = model(batch_x)
train_loss = criterion(mask_pred, batch_y)
train_loss.backward()
optimizer.step()
cur_step += 1
if cur_step % config.step_train_print == 0:
train_acc = accuracy(mask_pred, batch_y)
msg = 'the current step: {0}/{1}, train loss: {2:>5.2}, train acc: {3:>6.2%}'
print(
msg.format(cur_step, len(train_dataloader),
train_loss.item(), train_acc[0].item()))
val_miou = eval_net_unet_miou(model, valid_dataloader, device)
val_score = val_miou
if val_score > best_val_score:
best_val_score = val_score
torch.save(model.state_dict(), model_save_path)
improved_str = '*'
last_improved_epoch = cur_epoch
else:
improved_str = ''
msg = 'the current epoch: {0}/{1}, val score: {3:>6.2%}, cost: {4}s {5}'
end_time = int(time.time())
print(
msg.format(cur_epoch + 1, config.num_epochs, val_score,
end_time - start_time, improved_str))
if cur_epoch - last_improved_epoch > config.num_patience_epoch:
print("No optimization for a long time, auto-stopping...")
break
scheduler_cosine.step()
del model
gc.collect()
return best_val_score