def train(
sentences_train,
labels_train,
sentences_valid,
labels_valid,
batch_size=128,
n_epochs=10,
):
train_dataset = data.TensorDataset(sentences_train, labels_train)
valid_dataset = data.TensorDataset(sentences_valid, labels_valid)
model = Network()
train_loader = data.DataLoader(
train_dataset, batch_size=batch_size, shuffle=True, pin_memory=False
)
valid_loader = data.DataLoader(
valid_dataset, batch_size=batch_size, shuffle=False, pin_memory=False
)
databunch = DataBunch(train_dl=train_loader, valid_dl=valid_loader)
learn = Learner(databunch, model, loss_func=loss)
if torch.cuda.is_available():
learn = learn.to_fp16()
learn.fit_one_cycle(n_epochs)
return learn.model
def train(train_dataset: torch.utils.data.Dataset,
test_dataset: torch.utils.data.Dataset,
training_config: dict = train_config,
global_config: dict = global_config):
"""
Template training routine. Takes a training and a test dataset wrapped
as torch.utils.data.Dataset type and two corresponding generic
configs for both gobal path settings and training settings.
Returns the fitted fastai.train.Learner object which can be
used to assess the resulting metrics and error curves etc.
"""
for path in global_config.values():
create_dirs(path)
# wrap datasets with Dataloader classes
train_loader = torch.utils.data.DataLoader(
train_dataset, **train_config["DATA_LOADER_CONFIG"])
test_loader = torch.utils.data.DataLoader(
test_dataset, **train_config["DATA_LOADER_CONFIG"])
databunch = DataBunch(train_loader, test_loader)
# instantiate model and learner
if training_config["WEIGHTS"] is None:
model = training_config["MODEL"](**training_config["MODEL_CONFIG"])
else:
model = load_model(training_config["MODEL"],
training_config["MODEL_CONFIG"],
training_config["WEIGHTS"],
training_config["DEVICE"])
learner = Learner(databunch,
model,
metrics=train_config["METRICS"],
path=global_config["ROOT_PATH"],
model_dir=global_config["WEIGHT_DIR"],
loss_func=train_config["LOSS"])
# model name & paths
name = "_".join([train_config["DATE"], train_config["SESSION_NAME"]])
modelpath = os.path.join(global_config["WEIGHT_DIR"], name)
if train_config["MIXED_PRECISION"]:
learner.to_fp16()
learner.save(modelpath)
torch.backends.cudnn.benchmark = True
cbs = [
SaveModelCallback(learner),
LearnerTensorboardWriter(
learner,
Path(os.path.join(global_config["LOG_DIR"]), "tensorboardx"),
name),
TerminateOnNaNCallback()
]
# perform training iteration
try:
if train_config["ONE_CYCLE"]:
learner.fit_one_cycle(train_config["EPOCHS"],
max_lr=train_config["LR"],
callbacks=cbs)
else:
learner.fit(train_config["EPOCHS"],
lr=train_config["LR"],
callbacks=cbs)
# save model files
except KeyboardInterrupt:
learner.save(modelpath)
raise KeyboardInterrupt
learner.save(modelpath)
val_loss = min(learner.recorder.val_losses)
val_metrics = learner.recorder.metrics
# log using the logging tool
logger = log.Log(train_config, run_name=train_config['SESSION_NAME'])
logger.log_metric('Validation Loss', val_loss)
logger.log.metrics(val_metrics)
logger.end_run()
#write csv log file
log_content = train_config.copy()
log_content["VAL_LOSS"] = val_loss
log_content["VAL_METRICS"] = val_metrics
log_path = os.path.join(global_config["LOG_DIR"], train_config["LOGFILE"])
write_log(log_path, log_content)
return learner, log_content, name
