def train(inv_model, src_data, tgt_data, loss_func, inv_opt, args):
inv_model.train()
src_data.shuffle()
new_size = len(tgt_data) / args.batch_size * args.src_batch_size
new_size = int(new_size)
src_pos_data = [d for d in src_data if d.targets[0] == 1]
src_neg_data = [d for d in src_data if d.targets[0] == 0]
print(len(tgt_data))
print(len(src_pos_data), len(src_neg_data), new_size)
src_data = MoleculeDataset(src_pos_data + src_neg_data[:new_size])
src_data.shuffle()
tgt_data.shuffle()
src_iter = range(0, len(src_data), args.src_batch_size)
tgt_iter = range(0, len(tgt_data), args.batch_size)
for i, j in zip(src_iter, tgt_iter):
inv_model.zero_grad()
src_batch = src_data[i:i + args.src_batch_size]
src_batch = MoleculeDataset(src_batch)
src_loss = forward(inv_model, src_batch, loss_func, is_source=True)
tgt_batch = tgt_data[j:j + args.batch_size]
tgt_batch = MoleculeDataset(tgt_batch)
tgt_loss = forward(inv_model, tgt_batch, loss_func, is_source=False)
loss = (src_loss + tgt_loss) / 2
loss.backward()
inv_opt[0].step()
inv_opt[1].step()
lr = inv_opt[1].get_lr()[0]
ignorm = compute_gnorm(inv_model)
print(f'lr: {lr:.5f}, loss: {loss:.4f}, gnorm: {ignorm:.4f}')
def train(model: MoleculeModel,
data_loader: MoleculeDataLoader,
loss_func: Callable,
optimizer: Optimizer,
scheduler: _LRScheduler,
args: TrainArgs,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None) -> int:
"""
Trains a model for an epoch.
:param model: A :class:`~chemprop.models.model.MoleculeModel`.
:param data_loader: A :class:`~chemprop.data.data.MoleculeDataLoader`.
:param loss_func: Loss function.
:param optimizer: An optimizer.
:param scheduler: A learning rate scheduler.
:param args: A :class:`~chemprop.args.TrainArgs` object containing arguments for training the model.
:param n_iter: The number of iterations (training examples) trained on so far.
:param logger: A logger for recording output.
:param writer: A tensorboardX SummaryWriter.
:return: The total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
loss_sum, iter_count = 0, 0
for batch in tqdm(data_loader, total=len(data_loader)):
# Prepare batch
batch: MoleculeDataset
mol_batch, features_batch, target_batch = batch.batch_graph(
), batch.features(), batch.targets()
mask = torch.Tensor([[x is not None for x in tb]
for tb in target_batch])
targets = torch.Tensor([[0 if x is None else x for x in tb]
for tb in target_batch])
# Run model
model.zero_grad()
preds = model(mol_batch, features_batch)
# Move tensors to correct device
mask = mask.to(preds.device)
targets = targets.to(preds.device)
class_weights = torch.ones(targets.shape, device=preds.device)
if args.dataset_type == 'multiclass':
targets = targets.long()
loss = torch.cat([
loss_func(preds[:, target_index, :],
targets[:, target_index]).unsqueeze(1)
for target_index in range(preds.size(1))
],
dim=1) * class_weights * mask
else:
loss = loss_func(preds, targets) * class_weights * mask
loss = loss.sum() / mask.sum()
loss_sum += loss.item()
iter_count += len(batch)
loss.backward()
if args.grad_clip:
nn.utils.clip_grad_norm_(model.parameters(), args.grad_clip)
optimizer.step()
if isinstance(scheduler, NoamLR):
scheduler.step()
n_iter += len(batch)
# Log and/or add to tensorboard
if (n_iter // args.batch_size) % args.log_frequency == 0:
lrs = scheduler.get_lr()
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = loss_sum / iter_count
loss_sum, iter_count = 0, 0
lrs_str = ', '.join(f'lr_{i} = {lr:.4e}'
for i, lr in enumerate(lrs))
debug(
f'Loss = {loss_avg:.4e}, PNorm = {pnorm:.4f}, GNorm = {gnorm:.4f}, {lrs_str}'
)
if writer is not None:
writer.add_scalar('train_loss', loss_avg, n_iter)
writer.add_scalar('param_norm', pnorm, n_iter)
writer.add_scalar('gradient_norm', gnorm, n_iter)
for i, lr in enumerate(lrs):
writer.add_scalar(f'learning_rate_{i}', lr, n_iter)
return n_iter
def train(model: nn.Module,
data: Union[MoleculeDataset, List[MoleculeDataset]],
loss_func: Callable,
optimizer: Optimizer,
scheduler: _LRScheduler,
args: Namespace,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None) -> int:
"""
Trains a model for an epoch.
:param model: Model.
:param data: A MoleculeDataset (or list of MoleculeDatasets if using moe).
:param loss_func: Loss function.
:param optimizer: An Optimizer.
:param scheduler: A learning rate scheduler.
:param args: Arguments.
:param n_iter: Number of iterations (training examples) trained on so far.
:param logger: A logger for printing intermediate results.
:param writer: A tensorboardX SummaryWriter.
:return: Total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
data.shuffle()
loss_sum, iter_count = 0, 0
# don't use the last batch if it's small, for stability
num_iters = len(data) // args.batch_size * args.batch_size
iter_size = args.batch_size
for i in trange(0, num_iters, iter_size):
# Prepare batch
if i + args.batch_size > len(data):
break
mol_batch = MoleculeDataset(data[i:i + args.batch_size])
smiles_batch, features_batch, target_batch = \
mol_batch.smiles(), mol_batch.features(), mol_batch.targets()
mask = torch.Tensor([[not np.isnan(x) for x in tb]
for tb in target_batch])
targets = torch.Tensor([[0 if np.isnan(x) else x for x in tb]
for tb in target_batch])
if next(model.parameters()).is_cuda:
mask, targets = mask.cuda(), targets.cuda()
class_weights = torch.ones(targets.shape)
if args.cuda:
class_weights = class_weights.cuda()
# Run model
model.zero_grad()
preds = model(smiles_batch, features_batch)
# todo: change the loss function for property prediction tasks
if args.dataset_type == 'multiclass':
targets = targets.long()
loss = torch.cat([loss_func(preds[:, target_index, :],
targets[:, target_index]).unsqueeze(1)
for target_index in range(preds.size(1))],
dim=1) * class_weights * mask
else:
loss = loss_func(preds, targets) * class_weights * mask
loss = loss.sum() / mask.sum()
loss_sum += loss.item()
iter_count += len(mol_batch)
loss.backward()
optimizer.step()
if isinstance(scheduler, NoamLR):
scheduler.step()
n_iter += len(mol_batch)
# Log and/or add to tensorboard
if (n_iter // args.batch_size) % args.log_frequency == 0:
lrs = scheduler.get_lr()
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = loss_sum / iter_count
loss_sum, iter_count = 0, 0
lrs_str = ', '.join(
f'lr_{i} = {lr:.4e}' for i, lr in enumerate(lrs))
debug(
f'\nLoss = {loss_avg:.4e}, PNorm = {pnorm:.4f},'
f' GNorm = {gnorm:.4f}, {lrs_str}')
if writer is not None:
writer.add_scalar('train_loss', loss_avg, n_iter)
writer.add_scalar('param_norm', pnorm, n_iter)
writer.add_scalar('gradient_norm', gnorm, n_iter)
for idx, learn_rate in enumerate(lrs):
writer.add_scalar(
f'learning_rate_{idx}', learn_rate, n_iter)
return n_iter
def train(model: nn.Module,
data: Union[MoleculeDataset, List[MoleculeDataset]],
loss_func: Callable,
optimizer: Optimizer,
scheduler: _LRScheduler,
args: Namespace,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None,
chunk_names: bool = False,
val_smiles: List[str] = None,
test_smiles: List[str] = None) -> int:
"""
Trains a model for an epoch.
:param model: Model.
:param data: A MoleculeDataset (or a list of MoleculeDatasets if using moe).
:param loss_func: Loss function.
:param optimizer: An Optimizer.
:param scheduler: A learning rate scheduler.
:param args: Arguments.
:param n_iter: The number of iterations (training examples) trained on so far.
:param logger: A logger for printing intermediate results.
:param writer: A tensorboardX SummaryWriter.
:param chunk_names: Whether to train on the data in chunks. In this case,
data must be a list of paths to the data chunks.
:param val_smiles: Validation smiles strings without targets.
:param test_smiles: Test smiles strings without targets, used for adversarial setting.
:return: The total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
if args.dataset_type == 'bert_pretraining':
features_loss = nn.MSELoss()
if chunk_names:
for path, memo_path in tqdm(data, total=len(data)):
featurization.SMILES_TO_FEATURES = dict()
if os.path.isfile(memo_path):
found_memo = True
with open(memo_path, 'rb') as f:
featurization.SMILES_TO_FEATURES = pickle.load(f)
else:
found_memo = False
with open(path, 'rb') as f:
chunk = pickle.load(f)
if args.moe:
for source in chunk:
source.shuffle()
else:
chunk.shuffle()
n_iter = train(model=model,
data=chunk,
loss_func=loss_func,
optimizer=optimizer,
scheduler=scheduler,
args=args,
n_iter=n_iter,
logger=logger,
writer=writer,
chunk_names=False,
val_smiles=val_smiles,
test_smiles=test_smiles)
if not found_memo:
with open(memo_path, 'wb') as f:
pickle.dump(featurization.SMILES_TO_GRAPH,
f,
protocol=pickle.HIGHEST_PROTOCOL)
return n_iter
if not args.moe:
data.shuffle()
loss_sum, iter_count = 0, 0
if args.adversarial:
if args.moe:
train_smiles = []
for d in data:
train_smiles += d.smiles()
else:
train_smiles = data.smiles()
train_val_smiles = train_smiles + val_smiles
d_loss_sum, g_loss_sum, gp_norm_sum = 0, 0, 0
if args.moe:
test_smiles = list(test_smiles)
random.shuffle(test_smiles)
train_smiles = []
for d in data:
d.shuffle()
train_smiles.append(d.smiles())
num_iters = min(len(test_smiles), min([len(d) for d in data]))
elif args.maml:
num_iters = args.maml_batches_per_epoch * args.maml_batch_size
model.zero_grad()
maml_sum_loss = 0
else:
num_iters = len(data) if args.last_batch else len(
data) // args.batch_size * args.batch_size
if args.parallel_featurization:
batch_queue = Queue(args.batch_queue_max_size)
exit_queue = Queue(1)
batch_process = Process(target=async_mol2graph,
args=(batch_queue, data, args, num_iters,
args.batch_size, exit_queue,
args.last_batch))
batch_process.start()
currently_loaded_batches = []
iter_size = 1 if args.maml else args.batch_size
for i in trange(0, num_iters, iter_size):
if args.moe:
if not args.batch_domain_encs:
model.compute_domain_encs(
train_smiles) # want to recompute every batch
mol_batch = [
MoleculeDataset(d[i:i + args.batch_size]) for d in data
]
train_batch, train_targets = [], []
for b in mol_batch:
tb, tt = b.smiles(), b.targets()
train_batch.append(tb)
train_targets.append(tt)
test_batch = test_smiles[i:i + args.batch_size]
loss = model.compute_loss(train_batch, train_targets, test_batch)
model.zero_grad()
loss_sum += loss.item()
iter_count += len(mol_batch)
elif args.maml:
task_train_data, task_test_data, task_idx = data.sample_maml_task(
args)
mol_batch = task_test_data
smiles_batch, features_batch, target_batch = task_train_data.smiles(
), task_train_data.features(), task_train_data.targets(task_idx)
# no mask since we only picked data points that have the desired target
targets = torch.Tensor(target_batch).unsqueeze(1)
if next(model.parameters()).is_cuda:
targets = targets.cuda()
preds = model(smiles_batch, features_batch)
loss = loss_func(preds, targets)
loss = loss.sum() / len(smiles_batch)
grad = torch.autograd.grad(
loss, [p for p in model.parameters() if p.requires_grad])
theta = [
p for p in model.named_parameters() if p[1].requires_grad
] # comes in same order as grad
theta_prime = {
p[0]: p[1] - args.maml_lr * grad[i]
for i, p in enumerate(theta)
}
for name, nongrad_param in [
p for p in model.named_parameters()
if not p[1].requires_grad
]:
theta_prime[name] = nongrad_param + torch.zeros(
nongrad_param.size()).to(nongrad_param)
else:
# Prepare batch
if args.parallel_featurization:
if len(currently_loaded_batches) == 0:
currently_loaded_batches = batch_queue.get()
mol_batch, featurized_mol_batch = currently_loaded_batches.pop(
)
else:
if not args.last_batch and i + args.batch_size > len(data):
break
mol_batch = MoleculeDataset(data[i:i + args.batch_size])
smiles_batch, features_batch, target_batch = mol_batch.smiles(
), mol_batch.features(), mol_batch.targets()
if args.dataset_type == 'bert_pretraining':
batch = mol2graph(smiles_batch, args)
mask = mol_batch.mask()
batch.bert_mask(mask)
mask = 1 - torch.FloatTensor(mask) # num_atoms
features_targets = torch.FloatTensor(
target_batch['features']
) if target_batch[
'features'] is not None else None # num_molecules x features_size
targets = torch.FloatTensor(target_batch['vocab']) # num_atoms
if args.bert_vocab_func == 'feature_vector':
mask = mask.reshape(-1, 1)
else:
targets = targets.long()
else:
batch = smiles_batch
mask = torch.Tensor([[x is not None for x in tb]
for tb in target_batch])
targets = torch.Tensor([[0 if x is None else x for x in tb]
for tb in target_batch])
if next(model.parameters()).is_cuda:
mask, targets = mask.cuda(), targets.cuda()
if args.dataset_type == 'bert_pretraining' and features_targets is not None:
features_targets = features_targets.cuda()
if args.class_balance:
class_weights = []
for task_num in range(data.num_tasks()):
class_weights.append(
args.class_weights[task_num][targets[:,
task_num].long()])
class_weights = torch.stack(
class_weights).t() # num_molecules x num_tasks
else:
class_weights = torch.ones(targets.shape)
if args.cuda:
class_weights = class_weights.cuda()
# Run model
model.zero_grad()
if args.parallel_featurization:
previous_graph_input_mode = model.encoder.graph_input
model.encoder.graph_input = True # force model to accept already processed input
preds = model(featurized_mol_batch, features_batch)
model.encoder.graph_input = previous_graph_input_mode
else:
preds = model(batch, features_batch)
if args.dataset_type == 'regression_with_binning':
preds = preds.view(targets.size(0), targets.size(1), -1)
targets = targets.long()
loss = 0
for task in range(targets.size(1)):
loss += loss_func(
preds[:, task, :], targets[:, task]
) * class_weights[:,
task] * mask[:,
task] # for some reason cross entropy doesn't support multi target
loss = loss.sum() / mask.sum()
else:
if args.dataset_type == 'unsupervised':
targets = targets.long().reshape(-1)
if args.dataset_type == 'bert_pretraining':
features_preds, preds = preds['features'], preds['vocab']
if args.dataset_type == 'kernel':
preds = preds.view(int(preds.size(0) / 2), 2,
preds.size(1))
preds = model.kernel_output_layer(preds)
loss = loss_func(preds, targets) * class_weights * mask
if args.predict_features_and_task:
loss = (loss.sum() + loss[:, :-args.features_size].sum() * (args.task_weight-1)) \
/ (mask.sum() + mask[:, :-args.features_size].sum() * (args.task_weight-1))
else:
loss = loss.sum() / mask.sum()
if args.dataset_type == 'bert_pretraining' and features_targets is not None:
loss += features_loss(features_preds, features_targets)
loss_sum += loss.item()
iter_count += len(mol_batch)
if args.maml:
model_prime = build_model(args=args, params=theta_prime)
smiles_batch, features_batch, target_batch = task_test_data.smiles(
), task_test_data.features(), [
t[task_idx] for t in task_test_data.targets()
]
# no mask since we only picked data points that have the desired target
targets = torch.Tensor([[t] for t in target_batch])
if next(model_prime.parameters()).is_cuda:
targets = targets.cuda()
model_prime.zero_grad()
preds = model_prime(smiles_batch, features_batch)
loss = loss_func(preds, targets)
loss = loss.sum() / len(smiles_batch)
loss_sum += loss.item()
iter_count += len(
smiles_batch
) # TODO check that this makes sense, but it's just for display
maml_sum_loss += loss
if i % args.maml_batch_size == args.maml_batch_size - 1:
maml_sum_loss.backward()
optimizer.step()
model.zero_grad()
maml_sum_loss = 0
else:
loss.backward()
if args.max_grad_norm is not None:
clip_grad_norm_(model.parameters(), args.max_grad_norm)
optimizer.step()
if args.adjust_weight_decay:
current_pnorm = compute_pnorm(model)
if current_pnorm < args.pnorm_target:
for i in range(len(optimizer.param_groups)):
optimizer.param_groups[i]['weight_decay'] = max(
0, optimizer.param_groups[i]['weight_decay'] -
args.adjust_weight_decay_step)
else:
for i in range(len(optimizer.param_groups)):
optimizer.param_groups[i][
'weight_decay'] += args.adjust_weight_decay_step
if isinstance(scheduler, NoamLR):
scheduler.step()
if args.adversarial:
for _ in range(args.gan_d_per_g):
train_val_smiles_batch = random.sample(train_val_smiles,
args.batch_size)
test_smiles_batch = random.sample(test_smiles, args.batch_size)
d_loss, gp_norm = model.train_D(train_val_smiles_batch,
test_smiles_batch)
train_val_smiles_batch = random.sample(train_val_smiles,
args.batch_size)
test_smiles_batch = random.sample(test_smiles, args.batch_size)
g_loss = model.train_G(train_val_smiles_batch, test_smiles_batch)
# we probably only care about the g_loss honestly
d_loss_sum += d_loss * args.batch_size
gp_norm_sum += gp_norm * args.batch_size
g_loss_sum += g_loss * args.batch_size
n_iter += len(mol_batch)
# Log and/or add to tensorboard
if (n_iter // args.batch_size) % args.log_frequency == 0:
lrs = scheduler.get_lr()
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = loss_sum / iter_count
if args.adversarial:
d_loss_avg, g_loss_avg, gp_norm_avg = d_loss_sum / iter_count, g_loss_sum / iter_count, gp_norm_sum / iter_count
d_loss_sum, g_loss_sum, gp_norm_sum = 0, 0, 0
loss_sum, iter_count = 0, 0
lrs_str = ', '.join('lr_{} = {:.4e}'.format(i, lr)
for i, lr in enumerate(lrs))
debug("Loss = {:.4e}, PNorm = {:.4f}, GNorm = {:.4f}, {}".format(
loss_avg, pnorm, gnorm, lrs_str))
if args.adversarial:
debug(
"D Loss = {:.4e}, G Loss = {:.4e}, GP Norm = {:.4}".format(
d_loss_avg, g_loss_avg, gp_norm_avg))
if writer is not None:
writer.add_scalar('train_loss', loss_avg, n_iter)
writer.add_scalar('param_norm', pnorm, n_iter)
writer.add_scalar('gradient_norm', gnorm, n_iter)
for i, lr in enumerate(lrs):
writer.add_scalar('learning_rate_{}'.format(i), lr, n_iter)
if args.parallel_featurization:
exit_queue.put(
0) # dummy var to get the subprocess to know that we're done
batch_process.join()
return n_iter
def train(model: nn.Module,
data: Union[MoleculeDataset, List[MoleculeDataset]],
loss_func: Callable,
optimizer: Optimizer,
scheduler: _LRScheduler,
args: Namespace,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None) -> int:
"""
Trains a model for an epoch.
:param model: Model.
:param data: A MoleculeDataset (or a list of MoleculeDatasets if using moe).
:param loss_func: Loss function.
:param optimizer: An Optimizer.
:param scheduler: A learning rate scheduler.
:param args: Arguments.
:param n_iter: The number of iterations (training examples) trained on so far.
:param logger: A logger for printing intermediate results.
:param writer: A tensorboardX SummaryWriter.
:return: The total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
data.shuffle()
loss_sum, iter_count = 0, 0
iter_size = args.batch_size
if args.class_balance:
# Reconstruct data so that each batch has equal number of positives and negatives
# (will leave out a different random sample of negatives each epoch)
assert len(
data[0].targets) == 1 # only works for single class classification
pos = [d for d in data if d.targets[0] == 1]
neg = [d for d in data if d.targets[0] == 0]
new_data = []
pos_size = iter_size // 2
pos_index = neg_index = 0
while True:
new_pos = pos[pos_index:pos_index + pos_size]
new_neg = neg[neg_index:neg_index + iter_size - len(new_pos)]
if len(new_pos) == 0 or len(new_neg) == 0:
break
if len(new_pos) + len(new_neg) < iter_size:
new_pos = pos[pos_index:pos_index + iter_size - len(new_neg)]
new_data += new_pos + new_neg
pos_index += len(new_pos)
neg_index += len(new_neg)
data = new_data
num_iters = len(
data
) // args.batch_size * args.batch_size # don't use the last batch if it's small, for stability
for i in trange(0, num_iters, iter_size):
# Prepare batch
if i + args.batch_size > len(data):
break
mol_batch = MoleculeDataset(data[i:i + args.batch_size])
smiles_batch, features_batch, target_batch, weight_batch = mol_batch.smiles(
), mol_batch.features(), mol_batch.targets(), mol_batch.weights()
batch = smiles_batch
mask = torch.Tensor([[x is not None for x in tb]
for tb in target_batch])
targets = torch.Tensor([[0 if x is None else x for x in tb]
for tb in target_batch])
weights = torch.Tensor([[0 if x is None else x for x in tb]
for tb in weight_batch])
# print (weight_batch)
# print (weights)
if next(model.parameters()).is_cuda:
mask, targets = mask.cuda(), targets.cuda()
if args.enable_weight:
class_weights = weights
else:
class_weights = torch.ones(targets.shape)
# print(class_weights)
if args.cuda:
class_weights = class_weights.cuda()
# Run model
model.zero_grad()
preds = model(batch, features_batch)
if args.dataset_type == 'multiclass':
targets = targets.long()
loss = torch.cat([
loss_func(preds[:, target_index, :],
targets[:, target_index]).unsqueeze(1)
for target_index in range(preds.size(1))
],
dim=1) * class_weights * mask
else:
loss = loss_func(preds, targets) * class_weights * mask
# print ("loss")
# print (loss)
# print (class_weights)
loss = loss.sum() / mask.sum()
loss_sum += loss.item()
iter_count += len(mol_batch)
loss.backward()
optimizer.step()
if isinstance(scheduler, NoamLR):
scheduler.step()
n_iter += len(mol_batch)
# Log and/or add to tensorboard
if (n_iter // args.batch_size) % args.log_frequency == 0:
lrs = scheduler.get_lr()
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = loss_sum / iter_count
loss_sum, iter_count = 0, 0
lrs_str = ', '.join(f'lr_{i} = {lr:.4e}'
for i, lr in enumerate(lrs))
debug(
f'Loss = {loss_avg:.4e}, PNorm = {pnorm:.4f}, GNorm = {gnorm:.4f}, {lrs_str}'
)
if writer is not None:
writer.add_scalar('train_loss', loss_avg, n_iter)
writer.add_scalar('param_norm', pnorm, n_iter)
writer.add_scalar('gradient_norm', gnorm, n_iter)
for i, lr in enumerate(lrs):
writer.add_scalar(f'learning_rate_{i}', lr, n_iter)
return n_iter
def train(model: nn.Module,
data: Union[MoleculeDataset, List[MoleculeDataset]],
loss_func: Callable,
optimizer: Optimizer,
scheduler: _LRScheduler,
args: Namespace,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None) -> int:
"""
Trains a model for an epoch.
:param model: Model.
:param data: A MoleculeDataset (or a list of MoleculeDatasets if using moe).
:param loss_func: Loss function.
:param optimizer: An Optimizer.
:param scheduler: A learning rate scheduler.
:param args: Arguments.
:param n_iter: The number of iterations (training examples) trained on so far.
:param logger: A logger for printing intermediate results.
:param writer: A tensorboardX SummaryWriter.
:return: The total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
data = deepcopy(data)
data.shuffle()
if args.uncertainty == 'bootstrap':
data.sample(int(4 * len(data) / args.ensemble_size))
loss_sum, iter_count = 0, 0
num_iters = len(
data
) // args.batch_size * args.batch_size # don't use the last batch if it's small, for stability
iter_size = args.batch_size
for i in trange(0, num_iters, iter_size):
# Prepare batch
if i + args.batch_size > len(data):
break
mol_batch = MoleculeDataset(data[i:i + args.batch_size])
smiles_batch, features_batch, target_batch = mol_batch.smiles(
), mol_batch.features(), mol_batch.targets()
batch = smiles_batch
mask = torch.Tensor([[x is not None for x in tb]
for tb in target_batch])
targets = torch.Tensor([[0 if x is None else x for x in tb]
for tb in target_batch])
if next(model.parameters()).is_cuda:
mask, targets = mask.cuda(), targets.cuda()
class_weights = torch.ones(targets.shape)
if args.cuda:
class_weights = class_weights.cuda()
# Run model
model.zero_grad()
preds = model(batch, features_batch)
if model.uncertainty:
pred_targets = preds[:, [
j for j in range(len(preds[0])) if j % 2 == 0
]]
pred_var = preds[:,
[j for j in range(len(preds[0])) if j % 2 == 1]]
loss = loss_func(pred_targets, pred_var, targets)
# sigma = ((pred_targets - targets) ** 2).detach()
# loss = loss_func(pred_targets, targets) * class_weights * mask
# loss += nn.MSELoss(reduction='none')(pred_sigma, sigma) * class_weights * mask
else:
loss = loss_func(preds, targets) * class_weights * mask
loss = loss.sum() / mask.sum()
loss_sum += loss.item()
iter_count += len(mol_batch)
loss.backward()
optimizer.step()
if isinstance(scheduler, NoamLR):
scheduler.step()
n_iter += len(mol_batch)
# Log and/or add to tensorboard
if (n_iter // args.batch_size) % args.log_frequency == 0:
lrs = scheduler.get_lr()
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = loss_sum / iter_count
loss_sum, iter_count = 0, 0
lrs_str = ', '.join(f'lr_{i} = {lr:.4e}'
for i, lr in enumerate(lrs))
debug(
f'Loss = {loss_avg:.4e}, PNorm = {pnorm:.4f}, GNorm = {gnorm:.4f}, {lrs_str}'
)
if writer is not None:
writer.add_scalar('train_loss', loss_avg, n_iter)
writer.add_scalar('param_norm', pnorm, n_iter)
writer.add_scalar('gradient_norm', gnorm, n_iter)
for i, lr in enumerate(lrs):
writer.add_scalar(f'learning_rate_{i}', lr, n_iter)
return n_iter
def train(model: nn.Module,
data: Union[MoleculeDataset, List[MoleculeDataset]],
loss_func: Callable,
optimizer: Optimizer,
scheduler: _LRScheduler,
args: Namespace,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None) -> int:
"""
Trains a model for an epoch.
:param model: Model.
:param data: A MoleculeDataset (or a list of MoleculeDatasets if using moe).
:param loss_func: Loss function.
:param optimizer: An Optimizer.
:param scheduler: A learning rate scheduler.
:param args: Arguments.
:param n_iter: The number of iterations (training examples) trained on so far.
:param logger: A logger for printing intermediate results.
:param writer: A tensorboardX SummaryWriter.
:return: The total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
data.shuffle()
loss_sum, iter_count = 0, 0
num_iters = len(
data
) // args.batch_size * args.batch_size # don't use the last batch if it's small, for stability
iter_size = args.batch_size
for i in trange(0, num_iters, iter_size):
# Prepare batch
if i + args.batch_size > len(data):
break
mol_batch = MoleculeDataset(data[i:i + args.batch_size])
smiles_batch, features_batch, target_batch = mol_batch.smiles(
), mol_batch.features(), mol_batch.targets()
batch = smiles_batch
mask = torch.Tensor([[x is not None for x in tb]
for tb in target_batch])
targets = torch.Tensor([[0 if x is None else x for x in tb]
for tb in target_batch])
if next(model.parameters()).is_cuda:
mask, targets = mask.cuda(), targets.cuda()
class_weights = torch.ones(targets.shape)
#print('class_weight',class_weights.size(),class_weights)
#print('mask',mask.size(),mask)
if args.cuda:
class_weights = class_weights.cuda()
# Run model
model.zero_grad()
preds = model(batch, features_batch)
if args.dataset_type == 'multiclass':
targets = targets.long()
loss = torch.cat([
loss_func(preds[:, target_index, :],
targets[:, target_index]).unsqueeze(1)
for target_index in range(preds.size(1))
],
dim=1) * class_weights * mask
else:
loss = loss_func(preds, targets) * class_weights * mask
loss = loss.sum() / mask.sum()
############ add L1 regularization ############
ffn_d0_L1_reg_loss = 0
ffn_d1_L1_reg_loss = 0
ffn_d2_L1_reg_loss = 0
ffn_final_L1_reg_loss = 0
ffn_mol_L1_reg_loss = 0
lamda_ffn_d0 = 0
lamda_ffn_d1 = 0
lamda_ffn_d2 = 0
lamda_ffn_final = 0
lamda_ffn_mol = 0
for param in model.ffn_d0.parameters():
ffn_d0_L1_reg_loss += torch.sum(torch.abs(param))
for param in model.ffn_d1.parameters():
ffn_d1_L1_reg_loss += torch.sum(torch.abs(param))
for param in model.ffn_d2.parameters():
ffn_d2_L1_reg_loss += torch.sum(torch.abs(param))
for param in model.ffn_final.parameters():
ffn_final_L1_reg_loss += torch.sum(torch.abs(param))
for param in model.ffn_mol.parameters():
ffn_mol_L1_reg_loss += torch.sum(torch.abs(param))
loss += lamda_ffn_d0 * ffn_d0_L1_reg_loss + lamda_ffn_d1 * ffn_d1_L1_reg_loss + lamda_ffn_d2 * ffn_d2_L1_reg_loss + lamda_ffn_final * ffn_final_L1_reg_loss + lamda_ffn_mol * ffn_mol_L1_reg_loss
############ add L1 regularization ############
############ add L2 regularization ############
'''
ffn_d0_L2_reg_loss = 0
ffn_d1_L2_reg_loss = 0
ffn_d2_L2_reg_loss = 0
ffn_final_L2_reg_loss = 0
ffn_mol_L2_reg_loss = 0
lamda_ffn_d0 = 1e-6
lamda_ffn_d1 = 1e-6
lamda_ffn_d2 = 1e-5
lamda_ffn_final = 1e-4
lamda_ffn_mol = 1e-3
for param in model.ffn_d0.parameters():
ffn_d0_L2_reg_loss += torch.sum(torch.square(param))
for param in model.ffn_d1.parameters():
ffn_d1_L2_reg_loss += torch.sum(torch.square(param))
for param in model.ffn_d2.parameters():
ffn_d2_L2_reg_loss += torch.sum(torch.square(param))
for param in model.ffn_final.parameters():
ffn_final_L2_reg_loss += torch.sum(torch.square(param))
for param in model.ffn_mol.parameters():
ffn_mol_L2_reg_loss += torch.sum(torch.square(param))
loss += lamda_ffn_d0 * ffn_d0_L2_reg_loss + lamda_ffn_d1 * ffn_d1_L2_reg_loss + lamda_ffn_d2 * ffn_d2_L2_reg_loss + lamda_ffn_final * ffn_final_L2_reg_loss + lamda_ffn_mol * ffn_mol_L2_reg_loss
'''
############ add L2 regularization ############
loss_sum += loss.item()
iter_count += len(mol_batch)
#loss.backward(retain_graph=True) # wei, retain_graph=True
loss.backward()
optimizer.step()
if isinstance(scheduler, NoamLR):
scheduler.step()
n_iter += len(mol_batch)
# Log and/or add to tensorboard
if (n_iter // args.batch_size) % args.log_frequency == 0:
lrs = scheduler.get_lr()
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = loss_sum / iter_count
loss_sum, iter_count = 0, 0
lrs_str = ', '.join(f'lr_{i} = {lr:.4e}'
for i, lr in enumerate(lrs))
debug(
f'Loss = {loss_avg:.4e}, PNorm = {pnorm:.4f}, GNorm = {gnorm:.4f}, {lrs_str}'
)
if writer is not None:
writer.add_scalar('train_loss', loss_avg, n_iter)
writer.add_scalar('param_norm', pnorm, n_iter)
writer.add_scalar('gradient_norm', gnorm, n_iter)
for i, lr in enumerate(lrs):
writer.add_scalar(f'learning_rate_{i}', lr, n_iter)
#print(model)
return n_iter
def train(model: nn.Module,
data: Union[MoleculeDataset, List[MoleculeDataset]],
loss_func: Callable,
metric_func: Callable,
optimizer: Optimizer,
scheduler: _LRScheduler,
args: Namespace,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None) -> int:
"""
Trains a model for an epoch.
:param model: Model.
:param data: A MoleculeDataset (or a list of MoleculeDatasets if using moe).
:param loss_func: Loss function.
:param optimizer: An Optimizer.
:param scheduler: A learning rate scheduler.
:param args: Arguments.
:param n_iter: The number of iterations (training examples) trained on so far.
:param logger: A logger for printing intermediate results.
:param writer: A tensorboardX SummaryWriter.
:return: The total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
data.shuffle()
loss_sum, metric_sum, iter_count = [0]*(len(args.atom_targets) + len(args.bond_targets)), \
[0]*(len(args.atom_targets) + len(args.bond_targets)), 0
loss_weights = args.loss_weights
num_iters = len(
data
) // args.batch_size * args.batch_size # don't use the last batch if it's small, for stability
iter_size = args.batch_size
for i in trange(0, num_iters, iter_size):
# Prepare batch
if i + args.batch_size > len(data):
break
mol_batch = MoleculeDataset(data[i:i + args.batch_size])
smiles_batch, features_batch, target_batch = mol_batch.smiles(
), mol_batch.features(), mol_batch.targets()
batch = smiles_batch
#mask = torch.Tensor([[x is not None for x in tb] for tb in target_batch])
# FIXME assign 0 to None in target
# targets = [[0 if x is None else x for x in tb] for tb in target_batch]
targets = [torch.Tensor(np.concatenate(x)) for x in zip(*target_batch)]
if next(model.parameters()).is_cuda:
# mask, targets = mask.cuda(), targets.cuda()
targets = [x.cuda() for x in targets]
# FIXME
#class_weights = torch.ones(targets.shape)
#if args.cuda:
# class_weights = class_weights.cuda()
# Run model
model.zero_grad()
preds = model(batch, features_batch)
targets = [x.reshape([-1, 1]) for x in targets]
#FIXME mutlticlass
'''
if args.dataset_type == 'multiclass':
targets = targets.long()
loss = torch.cat([loss_func(preds[:, target_index, :], targets[:, target_index]).unsqueeze(1) for target_index in range(preds.size(1))], dim=1) * class_weights * mask
else:
loss = loss_func(preds, targets) * class_weights * mask
'''
loss_multi_task = []
metric_multi_task = []
for target, pred, lw in zip(targets, preds, loss_weights):
loss = loss_func(pred, target)
loss = loss.sum() / target.shape[0]
loss_multi_task.append(loss * lw)
if args.cuda:
metric = metric_func(pred.data.cpu().numpy(),
target.data.cpu().numpy())
else:
metric = metric_func(pred.data.numpy(), target.data.numpy())
metric_multi_task.append(metric)
loss_sum = [x + y for x, y in zip(loss_sum, loss_multi_task)]
iter_count += 1
sum(loss_multi_task).backward()
optimizer.step()
metric_sum = [x + y for x, y in zip(metric_sum, metric_multi_task)]
if isinstance(scheduler, NoamLR) or isinstance(scheduler, SinexpLR):
scheduler.step()
n_iter += len(mol_batch)
# Log and/or add to tensorboard
if (n_iter // args.batch_size) % args.log_frequency == 0:
lrs = scheduler.get_lr()
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = [x / iter_count for x in loss_sum]
metric_avg = [x / iter_count for x in metric_sum]
loss_sum, iter_count, metric_sum = [0]*(len(args.atom_targets) + len(args.bond_targets)), \
0, \
[0]*(len(args.atom_targets) + len(args.bond_targets))
loss_str = ', '.join(f'lss_{i} = {lss:.4e}'
for i, lss in enumerate(loss_avg))
metric_str = ', '.join(f'mc_{i} = {mc:.4e}'
for i, mc in enumerate(metric_avg))
lrs_str = ', '.join(f'lr_{i} = {lr:.4e}'
for i, lr in enumerate(lrs))
debug(
f'{loss_str}, {metric_str}, PNorm = {pnorm:.4f}, GNorm = {gnorm:.4f}, {lrs_str}'
)
if writer is not None:
for i, lss in enumerate(loss_avg):
writer.add_scalar(f'train_loss_{i}', lss, n_iter)
writer.add_scalar('param_norm', pnorm, n_iter)
writer.add_scalar('gradient_norm', gnorm, n_iter)
for i, lr in enumerate(lrs):
writer.add_scalar(f'learning_rate_{i}', lr, n_iter)
return n_iter
def train(model: nn.Module,
data_loader: MoleculeDataLoader,
loss_func: Callable,
optimizer: Optimizer,
scheduler: _LRScheduler,
args: TrainArgs,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None,
gp_switch: bool = False,
likelihood = None,
bbp_switch = None) -> int:
"""
Trains a model for an epoch.
:param model: Model.
:param data_loader: A MoleculeDataLoader.
:param loss_func: Loss function.
:param optimizer: An Optimizer.
:param scheduler: A learning rate scheduler.
:param args: Arguments.
:param n_iter: The number of iterations (training examples) trained on so far.
:param logger: A logger for printing intermediate results.
:param writer: A tensorboardX SummaryWriter.
:return: The total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
if likelihood is not None:
likelihood.train()
loss_sum = 0
if bbp_switch is not None:
data_loss_sum = 0
kl_loss_sum = 0
kl_loss_depth_sum = 0
#for batch in tqdm(data_loader, total=len(data_loader)):
for batch in data_loader:
# Prepare batch
batch: MoleculeDataset
# .batch_graph() returns BatchMolGraph
# .features() returns None if no additional features
# .targets() returns list of lists of floats containing the targets
mol_batch, features_batch, target_batch = batch.batch_graph(), batch.features(), batch.targets()
# mask is 1 where targets are not None
mask = torch.Tensor([[x is not None for x in tb] for tb in target_batch])
# where targets are None, replace with 0
targets = torch.Tensor([[0 if x is None else x for x in tb] for tb in target_batch])
# Move tensors to correct device
mask = mask.to(args.device)
targets = targets.to(args.device)
class_weights = torch.ones(targets.shape, device=args.device)
# zero gradients
model.zero_grad()
optimizer.zero_grad()
##### FORWARD PASS AND LOSS COMPUTATION #####
if bbp_switch == None:
# forward pass
preds = model(mol_batch, features_batch)
# compute loss
if gp_switch:
loss = -loss_func(preds, targets)
else:
loss = loss_func(preds, targets, torch.exp(model.log_noise))
### bbp non sample option
if bbp_switch == 1:
preds, kl_loss = model(mol_batch, features_batch, sample = False)
data_loss = loss_func(preds, targets, torch.exp(model.log_noise))
kl_loss /= args.train_data_size
loss = data_loss + kl_loss
### bbp sample option
if bbp_switch == 2:
if args.samples_bbp == 1:
preds, kl_loss = model(mol_batch, features_batch, sample=True)
data_loss = loss_func(preds, targets, torch.exp(model.log_noise))
kl_loss /= args.train_data_size
elif args.samples_bbp > 1:
data_loss_cum = 0
kl_loss_cum = 0
for i in range(args.samples_bbp):
preds, kl_loss_i = model(mol_batch, features_batch, sample=True)
data_loss_i = loss_func(preds, targets, torch.exp(model.log_noise))
kl_loss_i /= args.train_data_size
data_loss_cum += data_loss_i
kl_loss_cum += kl_loss_i
data_loss = data_loss_cum / args.samples_bbp
kl_loss = kl_loss_cum / args.samples_bbp
loss = data_loss + kl_loss
### DUN non sample option
if bbp_switch == 3:
cat = torch.exp(model.log_cat) / torch.sum(torch.exp(model.log_cat))
_, preds_list, kl_loss, kl_loss_depth = model(mol_batch, features_batch, sample=False)
data_loss = loss_func(preds_list, targets, torch.exp(model.log_noise), cat)
kl_loss /= args.train_data_size
kl_loss_depth /= args.train_data_size
loss = data_loss + kl_loss + kl_loss_depth
#print('-----')
#print(data_loss)
#print(kl_loss)
#print(cat)
### DUN sample option
if bbp_switch == 4:
cat = torch.exp(model.log_cat) / torch.sum(torch.exp(model.log_cat))
if args.samples_dun == 1:
_, preds_list, kl_loss, kl_loss_depth = model(mol_batch, features_batch, sample=True)
data_loss = loss_func(preds_list, targets, torch.exp(model.log_noise), cat)
kl_loss /= args.train_data_size
kl_loss_depth /= args.train_data_size
elif args.samples_dun > 1:
data_loss_cum = 0
kl_loss_cum = 0
for i in range(args.samples_dun):
_, preds_list, kl_loss_i, kl_loss_depth = model(mol_batch, features_batch, sample=True)
data_loss_i = loss_func(preds_list, targets, torch.exp(model.log_noise), cat)
kl_loss_i /= args.train_data_size
kl_loss_depth /= args.train_data_size
data_loss_cum += data_loss_i
kl_loss_cum += kl_loss_i
data_loss = data_loss_cum / args.samples_dun
kl_loss = kl_loss_cum / args.samples_dun
loss = data_loss + kl_loss + kl_loss_depth
#print('-----')
#print(data_loss)
#print(kl_loss)
#print(cat)
#############################################
# backward pass; update weights
loss.backward()
optimizer.step()
#for name, parameter in model.named_parameters():
#print(name)#, parameter.grad)
#print(np.sum(np.array(parameter.grad)))
# add to loss_sum and iter_count
loss_sum += loss.item() * len(batch)
if bbp_switch is not None:
data_loss_sum += data_loss.item() * len(batch)
kl_loss_sum += kl_loss.item() * len(batch)
if bbp_switch > 2:
kl_loss_depth_sum += kl_loss_depth * len(batch)
# update learning rate by taking a step
if isinstance(scheduler, NoamLR) or isinstance(scheduler, OneCycleLR):
scheduler.step()
# increment n_iter (total number of examples across epochs)
n_iter += len(batch)
########### per epoch REPORTING
if n_iter % args.train_data_size == 0:
lrs = scheduler.get_last_lr()
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = loss_sum / args.train_data_size
lrs_str = ', '.join(f'lr_{i} = {lr:.4e}' for i, lr in enumerate(lrs))
debug(f'Loss = {loss_avg:.4e}, PNorm = {pnorm:.4f}, GNorm = {gnorm:.4f}, {lrs_str}')
if bbp_switch is not None:
data_loss_avg = data_loss_sum / args.train_data_size
kl_loss_avg = kl_loss_sum / args.train_data_size
wandb.log({"Total loss": loss_avg}, commit=False)
wandb.log({"Likelihood cost": data_loss_avg}, commit=False)
wandb.log({"KL cost": kl_loss_avg}, commit=False)
if bbp_switch > 2:
kl_loss_depth_avg = kl_loss_depth_sum / args.train_data_size
wandb.log({"KL cost DEPTH": kl_loss_depth_avg}, commit=False)
# log variational categorical distribution
wandb.log({"d_1": cat.detach().cpu().numpy()[0]}, commit=False)
wandb.log({"d_2": cat.detach().cpu().numpy()[1]}, commit=False)
wandb.log({"d_3": cat.detach().cpu().numpy()[2]}, commit=False)
wandb.log({"d_4": cat.detach().cpu().numpy()[3]}, commit=False)
wandb.log({"d_5": cat.detach().cpu().numpy()[4]}, commit=False)
else:
if gp_switch:
wandb.log({"Negative ELBO": loss_avg}, commit=False)
else:
wandb.log({"Negative log likelihood (scaled)": loss_avg}, commit=False)
if args.pdts:
wandb.log({"Learning rate": lrs[0]}, commit=True)
else:
wandb.log({"Learning rate": lrs[0]}, commit=False)
if args.pdts and args.swag:
return loss_avg, n_iter
else:
return n_iter
def train(model: nn.Module,
data: DataLoader,
loss_func: Callable,
optimizer: Optimizer,
scheduler: NoamLR,
args: Namespace,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None) -> int:
"""
Trains a model for an epoch.
:param model: Model.
:param data: A DataLoader.
:param loss_func: Loss function.
:param optimizer: Optimizer.
:param scheduler: A NoamLR learning rate scheduler.
:param args: Arguments.
:param n_iter: The number of iterations (training examples) trained on so far.
:param logger: A logger for printing intermediate results.
:param writer: A tensorboardX SummaryWriter.
:return: The total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
loss_sum, iter_count = 0, 0
for batch in tqdm(data, total=len(data)):
if args.cuda:
targets = batch.y.float().unsqueeze(1).cuda()
else:
targets = batch.y.float().unsqueeze(1)
batch = GlassBatchMolGraph(
batch) # TODO: Apply a check for connectivity of graph
# Run model
model.zero_grad()
preds = model(batch)
loss = loss_func(preds, targets)
loss = loss.sum() / loss.size(0)
loss_sum += loss.item()
iter_count += len(batch)
loss.backward()
if args.max_grad_norm is not None:
clip_grad_norm_(model.parameters(), args.max_grad_norm)
optimizer.step()
scheduler.step()
n_iter += len(batch)
# Log and/or add to tensorboard
if (n_iter // args.batch_size) % args.log_frequency == 0:
lr = scheduler.get_lr()[0]
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = loss_sum / iter_count
loss_sum, iter_count = 0, 0
debug("Loss = {:.4e}, PNorm = {:.4f}, GNorm = {:.4f}, lr = {:.4e}".
format(loss_avg, pnorm, gnorm, lr))
if writer is not None:
writer.add_scalar('train_loss', loss_avg, n_iter)
writer.add_scalar('param_norm', pnorm, n_iter)
writer.add_scalar('gradient_norm', gnorm, n_iter)
writer.add_scalar('learning_rate', lr, n_iter)
return n_iter
def train(model: MoleculeModel,
data_loader: MoleculeDataLoader,
loss_func: Callable,
optimizer: Optimizer,
scheduler: _LRScheduler,
args: TrainArgs,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None) -> int:
"""
Trains a model for an epoch.
:param model: A :class:`~chemprop.models.model.MoleculeModel`.
:param data_loader: A :class:`~chemprop.data.data.MoleculeDataLoader`.
:param loss_func: Loss function.
:param optimizer: An optimizer.
:param scheduler: A learning rate scheduler.
:param args: A :class:`~chemprop.args.TrainArgs` object containing arguments for training the model.
:param n_iter: The number of iterations (training examples) trained on so far.
:param logger: A logger for recording output.
:param writer: A tensorboardX SummaryWriter.
:return: The total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
loss_sum = iter_count = 0
for batch in tqdm(data_loader, total=len(data_loader), leave=False):
# Prepare batch
batch: MoleculeDataset
mol_batch, features_batch, target_batch, mask_batch, atom_descriptors_batch, atom_features_batch, bond_features_batch, data_weights_batch = \
batch.batch_graph(), batch.features(), batch.targets(), batch.mask(), batch.atom_descriptors(), \
batch.atom_features(), batch.bond_features(), batch.data_weights()
mask = torch.tensor(mask_batch, dtype=torch.bool) # shape(batch, tasks)
targets = torch.tensor([[0 if x is None else x for x in tb] for tb in target_batch]) # shape(batch, tasks)
if args.target_weights is not None:
target_weights = torch.tensor(args.target_weights).unsqueeze(0) # shape(1,tasks)
else:
target_weights = torch.ones(targets.shape[1]).unsqueeze(0)
data_weights = torch.tensor(data_weights_batch).unsqueeze(1) # shape(batch,1)
if args.loss_function == 'bounded_mse':
lt_target_batch = batch.lt_targets() # shape(batch, tasks)
gt_target_batch = batch.gt_targets() # shape(batch, tasks)
lt_target_batch = torch.tensor(lt_target_batch)
gt_target_batch = torch.tensor(gt_target_batch)
# Run model
model.zero_grad()
preds = model(mol_batch, features_batch, atom_descriptors_batch, atom_features_batch, bond_features_batch)
# Move tensors to correct device
torch_device = preds.device
mask = mask.to(torch_device)
targets = targets.to(torch_device)
target_weights = target_weights.to(torch_device)
data_weights = data_weights.to(torch_device)
if args.loss_function == 'bounded_mse':
lt_target_batch = lt_target_batch.to(torch_device)
gt_target_batch = gt_target_batch.to(torch_device)
# Calculate losses
if args.loss_function == 'mcc' and args.dataset_type == 'classification':
loss = loss_func(preds, targets, data_weights, mask) *target_weights.squeeze(0)
elif args.loss_function == 'mcc': # multiclass dataset type
targets = targets.long()
target_losses = []
for target_index in range(preds.size(1)):
target_loss = loss_func(preds[:, target_index, :], targets[:, target_index], data_weights, mask[:, target_index]).unsqueeze(0)
target_losses.append(target_loss)
loss = torch.cat(target_losses).to(torch_device) * target_weights.squeeze(0)
elif args.dataset_type == 'multiclass':
targets = targets.long()
if args.loss_function == 'dirichlet':
loss = loss_func(preds, targets, args.evidential_regularization) * target_weights * data_weights * mask
else:
target_losses = []
for target_index in range(preds.size(1)):
target_loss = loss_func(preds[:, target_index, :], targets[:, target_index]).unsqueeze(1)
target_losses.append(target_loss)
loss = torch.cat(target_losses, dim=1).to(torch_device) * target_weights * data_weights * mask
elif args.dataset_type == 'spectra':
loss = loss_func(preds, targets, mask) * target_weights * data_weights * mask
elif args.loss_function == 'bounded_mse':
loss = loss_func(preds, targets, lt_target_batch, gt_target_batch) * target_weights * data_weights * mask
elif args.loss_function == 'evidential':
loss = loss_func(preds, targets, args.evidential_regularization) * target_weights * data_weights * mask
elif args.loss_function == 'dirichlet': # classification
loss = loss_func(preds, targets, args.evidential_regularization) * target_weights * data_weights * mask
else:
loss = loss_func(preds, targets) * target_weights * data_weights * mask
loss = loss.sum() / mask.sum()
loss_sum += loss.item()
iter_count += 1
loss.backward()
if args.grad_clip:
nn.utils.clip_grad_norm_(model.parameters(), args.grad_clip)
optimizer.step()
if isinstance(scheduler, NoamLR):
scheduler.step()
n_iter += len(batch)
# Log and/or add to tensorboard
if (n_iter // args.batch_size) % args.log_frequency == 0:
lrs = scheduler.get_lr()
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = loss_sum / iter_count
loss_sum = iter_count = 0
lrs_str = ', '.join(f'lr_{i} = {lr:.4e}' for i, lr in enumerate(lrs))
debug(f'Loss = {loss_avg:.4e}, PNorm = {pnorm:.4f}, GNorm = {gnorm:.4f}, {lrs_str}')
if writer is not None:
writer.add_scalar('train_loss', loss_avg, n_iter)
writer.add_scalar('param_norm', pnorm, n_iter)
writer.add_scalar('gradient_norm', gnorm, n_iter)
for i, lr in enumerate(lrs):
writer.add_scalar(f'learning_rate_{i}', lr, n_iter)
return n_iter
def train(model: nn.Module,
data: MolPairDataset,
loss_func: Callable,
optimizer: Optimizer,
scheduler: _LRScheduler,
args: Namespace,
n_iter: int = 0,
logger: logging.Logger = None,
writer: SummaryWriter = None) -> int:
"""
Trains a model for an epoch.
:param model: Model.
:param data: A MolPairDataset (or a list of MolPairDatasets if using moe).
:param loss_func: Loss function.
:param optimizer: An Optimizer.
:param scheduler: A learning rate scheduler.
:param args: Arguments.
:param n_iter: The number of iterations (training examples) trained on so far.
:param logger: A logger for printing intermediate results.
:param writer: A tensorboardX SummaryWriter.
:return: The total number of iterations (training examples) trained on so far.
"""
debug = logger.debug if logger is not None else print
model.train()
data.shuffle(
) # Very important this is done before conversion to maintain randomness in contrastive dataset.
loss_sum, iter_count = 0, 0
if args.loss_func == 'contrastive':
data = convert2contrast(data)
num_iters = len(
data
) // args.batch_size * args.batch_size # don't use the last batch if it's small, for stability
iter_size = args.batch_size
for i in trange(0, num_iters, iter_size):
# Prepare batch
if i + args.batch_size > len(data):
break
mol_batch = MolPairDataset(data[i:i + args.batch_size])
smiles_batch, features_batch, target_batch = mol_batch.smiles(
), mol_batch.features(), mol_batch.targets()
batch = smiles_batch
targets = torch.Tensor([[0 if x is None else x for x in tb]
for tb in target_batch])
if args.loss_func == 'contrastive':
mask = targets
else:
mask = torch.Tensor([[x is not None for x in tb]
for tb in target_batch])
if next(model.parameters()).is_cuda:
mask, targets = mask.cuda(), targets.cuda()
if args.dataset_type == 'regression':
class_weights = torch.ones(targets.shape)
else:
class_weights = targets * (args.class_weights - 1) + 1
if args.cuda:
class_weights = class_weights.cuda()
# Run model
model.zero_grad()
preds = model(batch, features_batch)
if args.dataset_type == 'multiclass':
targets = targets.long()
loss = torch.cat([
loss_func(preds[:, target_index, :],
targets[:, target_index]).unsqueeze(1)
for target_index in range(preds.size(1))
],
dim=1) * class_weights * mask
else:
loss = loss_func(preds, targets) * class_weights * mask
loss = loss.sum() / mask.sum()
loss_sum += loss.item()
iter_count += 1
loss.backward()
if args.grad_clip:
nn.utils.clip_grad_norm_(model.parameters(), args.grad_clip)
optimizer.step()
if isinstance(scheduler, NoamLR):
scheduler.step()
n_iter += args.batch_size
# Log and/or add to tensorboard
if (n_iter // args.batch_size) % args.log_frequency == 0:
lrs = scheduler.get_lr()
pnorm = compute_pnorm(model)
gnorm = compute_gnorm(model)
loss_avg = loss_sum / iter_count
loss_sum, iter_count = 0, 0
lrs_str = ', '.join(f'lr_{i} = {lr:.4e}'
for i, lr in enumerate(lrs))
debug(
f'Loss = {loss_avg:.4e}, PNorm = {pnorm:.4f}, GNorm = {gnorm:.4f}, {lrs_str}'
)
if writer is not None:
writer.add_scalar('train_loss', loss_avg, n_iter)
writer.add_scalar('param_norm', pnorm, n_iter)
writer.add_scalar('gradient_norm', gnorm, n_iter)
for i, lr in enumerate(lrs):
writer.add_scalar(f'learning_rate_{i}', lr, n_iter)
return n_iter
