def train(config):
"""
Performs training and evaluation of MLP model.
NOTE: You should the model on the whole test set each eval_freq iterations.
"""
# YOUR TRAINING CODE GOES HERE
transform = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize((0.5, 0.5, 0.5), (0.5, 0.5, 0.5))
])
train_data = CIFAR10(DATA_DIR_DEFAULT,
train=True,
download=True,
transform=transform)
data_loader = DataLoader(train_data, batch_size=config.batch_size)
model = CNN(3, 10)
criterion = nn.CrossEntropyLoss()
optimizer = torch.optim.Adam(model.parameters(), lr=1e-4)
for step, (batch_inputs, batch_targets) in enumerate(data_loader):
# print(batch_inputs.size())
hit = 0
n, dim, _, __ = batch_inputs.size()
# for i in range(n):
# temp_x = torch.unsqueeze(batch_inputs[i], 0)
# print(temp_x.size())
# y_pre = model.forward(temp_x)
y_pre = model.forward(batch_inputs)
for i in range(n):
y_ev, _ = max(enumerate(y_pre[i]), key=itemgetter(1))
y = batch_targets[i].item()
if y_ev == y:
hit += 1
torch.nn.utils.clip_grad_norm(model.parameters(), max_norm=10)
# Add more code here ...
loss = criterion(y_pre, batch_targets) # fixme
accuracy = hit / n * 100 # fixme
optimizer.zero_grad()
loss.backward()
optimizer.step()
if step % config.eval_freq == 0:
print("loss: ", loss.item())
print("accuracy: ", accuracy)
if step == config.max_steps:
# If you receive a PyTorch data-loader error, check this bug report:
# https://github.com/pytorch/pytorch/pull/9655
break
print('Done training.')
def main():
# Load net
cnn = CNN()
loss_func = nn.MultiLabelSoftMarginLoss()
optimizer = optim.Adam(cnn.parameters(), lr=learning_rate)
if torch.cuda.is_available():
cnn.cuda()
loss_func.cuda()
# Load data
train_dataloader = dataset.get_train_data_loader()
test_dataloader = dataset.get_test_data_loader()
# Train model
for epoch in range(num_epochs):
cnn.train()
for i, (images, labels) in enumerate(train_dataloader):
images = Variable(images)
labels = Variable(labels.long())
if torch.cuda.is_available():
images = images.cuda()
labels = labels.cuda()
predict_labels = cnn(images)
loss = loss_func(predict_labels, labels)
optimizer.zero_grad()
loss.backward()
optimizer.step()
if (i + 1) % 100 == 0:
print("epoch:", epoch, "step:", i, "loss:", loss.item())
# Save and test model
if (epoch + 1) % 10 == 0:
filename = "model" + str(epoch + 1) + ".pkl"
torch.save(cnn.state_dict(), filename)
cnn.eval()
correct = 0
total = 0
for (image, label) in test_dataloader:
vimage = Variable(image)
if torch.cuda.is_available():
vimage = vimage.cuda()
output = cnn(vimage)
predict_label = ""
for k in range(4):
predict_label += config.CHAR_SET[np.argmax(
output[0, k * config.CHAR_SET_LEN:(k + 1) *
config.CHAR_SET_LEN].data.cpu().numpy())]
true_label = one_hot.vec2text(label.numpy()[0])
total += label.size(0)
if predict_label == true_label:
correct += 1
if total % 200 == 0:
print(
'Test Accuracy of the model on the %d test images: %f %%'
% (total, 100 * correct / total))
print('Test Accuracy of the model on the %d test images: %f %%' %
(total, 100 * correct / total))
print("save and test model...")
torch.save(cnn.state_dict(), "./model.pkl") # current is model.pkl
print("save last model")
def train(trainloader):
"""
Performs training and evaluation of CNN model.
NOTE: You should the model on the whole test set each eval_freq iterations.
"""
# YOUR TRAINING CODE GOES HERE
n_channels = 3
n_classes = 5
cnn = CNN(n_channels, n_classes)
device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
cnn.to(device)
# Loss and Optimizer
criterion = nn.CrossEntropyLoss()
optimizer = torch.optim.Adam(cnn.parameters(), lr=LEARNING_RATE_DEFAULT)
losses = []
accuracies = []
for epoch in range(MAX_EPOCHS_DEFAULT):
timestart = time.time()
running_loss = 0.0
for step, (batch_x, batch_y) in enumerate(trainloader):
# zero the parameter gradients
optimizer.zero_grad()
# Forward + Backward + Optimize
batch_x, batch_y = batch_x.to(device), batch_y.to(device)
outputs = cnn(batch_x)
loss = criterion(outputs, batch_y)
loss.backward()
optimizer.step()
running_loss += loss.item()
if step % EVAL_FREQ_DEFAULT == EVAL_FREQ_DEFAULT - 1:
print('[epoch: %d, step: %5d] loss: %.4f' %
(epoch, step, running_loss / EVAL_FREQ_DEFAULT))
losses.append(running_loss / EVAL_FREQ_DEFAULT)
running_loss = 0.0
accu = accuracy(outputs, batch_y)
accuracies.append(accu)
print('Accuracy on the %d train images: %.3f %%' %
(batch_y.size(0), accu))
break
print('epoch %d cost %3f sec' % (epoch, time.time() - timestart))
print('---Finished Training---')
return cnn, losses, accuracies
def main(args):
transform = transforms.ToTensor()
mode = args.mode
train_loader = torch.utils.data.DataLoader(
UrbanSound8KDataset('UrbanSound8K_train.pkl', mode),
batch_size=args.batch_size,
shuffle=True,
num_workers=args.worker_count,
pin_memory=True
)
val_loader = torch.utils.data.DataLoader(
UrbanSound8KDataset('UrbanSound8K_test.pkl', mode),
batch_size=args.batch_size,
shuffle=True,
num_workers=args.worker_count,
pin_memory=True
)
## Build a model based on mode
if args.mode == 'MLMC':
model = CNN(height=145, width=41, channels=1, class_count=10, dropout=args.dropout,mode = args.mode)
else:
model = CNN(height=85, width=41, channels=1, class_count=10, dropout=args.dropout,mode = args.mode)
## Redefine the criterion to be softmax cross entropy
criterion = nn.CrossEntropyLoss()
## Use adam optimizer. AdamW is Adam with L-2 regularisation.
optimizer = torch.optim.AdamW(model.parameters(), lr=args.learning_rate, weight_decay=args.weight_decay)
log_dir = get_summary_writer_log_dir(args)
print(f"Writing logs to {log_dir}")
summary_writer = SummaryWriter(
str(log_dir),
flush_secs=5
)
trainer = Trainer(
model, train_loader, val_loader, criterion, optimizer, summary_writer,
DEVICE, args.checkpoint_path, checkpoint_frequency = args.checkpoint_frequency
)
trainer.train(
args.epochs,
args.val_frequency,
print_frequency=args.print_frequency,
log_frequency=args.log_frequency,
)
summary_writer.close()
def train(model_name='model.pkl'):
cnn = CNN()
cnn.train()
print('init net')
criterion = nn.MultiLabelSoftMarginLoss()
optimizer = torch.optim.Adam(cnn.parameters(),
lr=setting.TRAIN_LEARNING_RATE)
# Train the Model
train_dataloader = dataset.get_train_data_loader()
for epoch in range(setting.TRAIN_NUM_EPOCHS):
for i, (images, labels) in enumerate(train_dataloader):
images = Variable(images)
labels = Variable(labels.float())
predict_labels = cnn(images)
loss = criterion(predict_labels, labels)
optimizer.zero_grad()
loss.backward()
optimizer.step()
print('epoch: % -3s loss: %s' % (epoch, loss.item()))
torch.save(cnn.state_dict(), model_name) # current is model.pkl
print('save last model')
def train_model(embedding_size, hidden_size, filter_width, max_or_mean,
max_num_epochs, batch_size, learning_rate, loss_margin,
training_checkpoint, dropout_prob, eval_batch_size):
global load_model_path, train_data, source_questions
global dev_data, dev_label_dict, test_data, test_label_dict
global dev_pos_data, dev_neg_data, test_pos_data, test_neg_data, target_questions
# Generate model
cnn = CNN(embedding_size, hidden_size, filter_width, max_or_mean,
dropout_prob)
optimizer = optim.Adam(cnn.parameters(), lr=learning_rate)
criterion = nn.MultiMarginLoss(margin=loss_margin)
init_epoch = 1
# Load model
if load_model_path is not None:
print("Loading model from \"" + load_model_path + "\"...")
init_epoch = load_model(load_model_path, cnn, optimizer)
# Training
print("***************************************")
print("Starting run with following parameters:")
print(" --embedding size: %d" % (cnn.input_size))
print(" --hidden size: %d" % (cnn.hidden_size))
print(" --filter width: %d" % (cnn.n))
print(" --dropout: %f" % (cnn.dropout_prob))
print(" --pooling: %s" % (cnn.max_or_mean))
print(" --initial epoch: %d" % (init_epoch))
print(" --number of epochs: %d" % (max_num_epochs))
print(" --batch size: %d" % (batch_size))
print(" --learning rate: %f" % (learning_rate))
print(" --loss margin: %f" % (loss_margin))
start = time.time()
current_loss = 0
for iter in range(init_epoch, max_num_epochs + 1):
current_loss += train(cnn, criterion, optimizer, train_data,
source_questions, batch_size, 21)
if iter % training_checkpoint == 0:
print("Epoch %d: Average Train Loss: %.5f, Time: %s" %
(iter,
(current_loss / training_checkpoint), timeSince(start)))
d_auc = evaluate_auc(cnn, dev_pos_data, dev_neg_data,
target_questions, eval_batch_size)
t_auc = evaluate_auc(cnn, test_pos_data, test_neg_data,
target_questions, eval_batch_size)
print("Dev AUC(0.05): %.2f" % (d_auc))
print("Test AUC(0.05): %.2f" % (t_auc))
current_loss = 0
if SAVE_MODEL:
state = {}
state["model"] = cnn.state_dict()
state["optimizer"] = optimizer.state_dict()
state["epoch"] = iter
save_model(save_model_path, "cnn_dt", state,
iter == max_num_epochs)
# Compute final results
print("-------")
print("FINAL RESULTS:")
d_auc = evaluate_auc(cnn, dev_pos_data, dev_neg_data, target_questions,
eval_batch_size)
t_auc = evaluate_auc(cnn, test_pos_data, test_neg_data, target_questions,
eval_batch_size)
print("Training time: %s" % (timeSince(start)))
print("Dev AUC(0.05): %.2f" % (d_auc))
print("Test AUC(0.05): %.2f" % (t_auc))
if SAVE_MODEL:
state = {}
state["model"] = cnn.state_dict()
state["optimizer"] = optimizer.state_dict()
state[
"epoch"] = max_num_epochs if init_epoch < max_num_epochs else init_epoch
save_model(save_model_path, "cnn", state, True)
return (d_auc, t_auc)
def train():
"""
Performs training and evaluation of MLP cnn.
NOTE: You should the cnn on the whole test set each eval_freq iterations.
"""
# YOUR TRAINING CODE GOES HERE
transform = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize((0.5, 0.5, 0.5), (0.5, 0.5, 0.5))
])
train_data = datasets.CIFAR10('data',
train=True,
download=True,
transform=transform)
test_data = datasets.CIFAR10('data',
train=False,
download=True,
transform=transform)
train_on_gpu = torch.cuda.is_available()
num_train = len(train_data)
train_loader = torch.utils.data.DataLoader(train_data,
batch_size=FLAGS.batch_size,
shuffle=True,
num_workers=0)
test_loader = torch.utils.data.DataLoader(test_data,
batch_size=FLAGS.batch_size,
shuffle=False,
num_workers=0)
classes = [
'airplane', 'automobile', 'bird', 'cat', 'deer', 'dog', 'frog',
'horse', 'ship', 'truck'
]
cnn = CNN(3, 10)
if train_on_gpu:
cnn.cuda()
criterion = nn.CrossEntropyLoss()
optimizer = optim.Adam(cnn.parameters(), lr=FLAGS.learning_rate)
for epoch in range(1, FLAGS.max_steps):
class_correct = list(0. for i in range(10))
class_total = list(0. for i in range(10))
train_loss = 0.0
test_loss = 0.0
cnn.train()
for data, target in train_loader:
if train_on_gpu:
data, target = data.cuda(), target.cuda()
optimizer.zero_grad()
output = cnn(data)
loss = criterion(output, target)
loss.backward()
optimizer.step()
_, pred = torch.max(output, 1)
correct_tensor = pred.eq(target.data.view_as(pred))
train_loss += loss.item() * data.size(0)
correct = np.squeeze(
correct_tensor.numpy()) if not train_on_gpu else np.squeeze(
correct_tensor.cpu().numpy())
for i in range(len(target.data)):
label = target.data[i]
class_correct[label] += correct[i].item()
class_total[label] += 1
if epoch % FLAGS.eval_freq == 0:
test_correct = list(0. for i in range(10))
test_total = list(0. for i in range(10))
cnn.eval()
for data, target in test_loader:
if train_on_gpu:
data, target = data.cuda(), target.cuda()
output = cnn(data)
_, pred = torch.max(output, 1)
correct_tensor = pred.eq(target.data.view_as(pred))
correct = np.squeeze(correct_tensor.numpy()
) if not train_on_gpu else np.squeeze(
correct_tensor.cpu().numpy())
loss = criterion(output, target)
test_loss += loss.item() * data.size(0)
for i in range(len(target.data)):
label = target.data[i]
test_correct[label] += correct[i].item()
test_total[label] += 1
train_loss = train_loss / len(train_loader.dataset)
test_loss = test_loss / len(test_loader.dataset)
plot_epoch.append(epoch)
plot_train_loss.append(train_loss)
plot_test_loss.append(test_loss)
print(
'Epoch: {} \tTraining Loss: {:.6f} \tTest Loss: {:.6f}'.format(
epoch, train_loss, test_loss))
percent_train = accuracy(class_correct, class_total) * 100
percent_test = accuracy(test_correct, test_total) * 100
plot_train_accuracy.append(percent_train)
plot_test_accuracy.append(percent_test)
print('train accuracy: ', percent_train, 'test accuracy: ',
percent_test)
fig1 = plt.subplot(2, 1, 1)
fig2 = plt.subplot(2, 1, 2)
fig1.plot(plot_epoch,
plot_train_accuracy,
c='red',
label='training data accuracy')
fig1.plot(plot_epoch,
plot_test_accuracy,
c='blue',
label='test data accuracy')
fig1.legend()
fig2.plot(plot_epoch, plot_train_loss, c='green', label='train CE loss')
fig2.plot(plot_epoch, plot_test_loss, c='yellow', label='test CE loss')
fig2.legend()
plt.show()
if (model_type == "CNN"):
# dropout_keep_prob, embedding_size, batch_size, lr, dev_size, vocabulary_size, max_document_length, input_size, hidden_size, output_dim, n_filters, filter_sizes, num_epochs = get_params(model_type)
hidden_size = 128
pool_size = 2
n_filters = 128
filter_sizes = [3, 8]
num_epochs = 5
to_train = True
cnn_model = CNN(vocab_size, embedding_size, n_filters, filter_sizes,
pool_size, hidden_size, num_classes, dropout_keep_prob)
# optimization algorithm
optimizer = torch.optim.Adam(cnn_model.parameters(), lr=lr)
# train and evaluation
if (to_train):
# train and evaluation
run_train(num_epochs, cnn_model, train_iterator, valid_iterator,
optimizer, loss_func, model_type)
# load weights
cnn_model.load_state_dict(
torch.load(os.path.join(path, "saved_weights_CNN.pt")))
# predict
test_loss, test_acc = evaluate(cnn_model, test_iterator, loss_func)
print(f'Test Loss: {test_loss:.3f} | Test Acc: {test_acc * 100:.2f}%')
if (model_type == "LSTM"):