def train():
model = resnet18(classes_num=1, in_channels=3, pretrained=True)
train_config = TrainConfig([train_stage, val_stage],
torch.nn.BCEWithLogitsLoss(),
torch.optim.Adam(model.parameters(), lr=1e-4))
file_struct_manager = FileStructManager(base_dir='data', is_continue=False)
trainer = Trainer(model, train_config, file_struct_manager,
torch.device('cuda:0')).set_epoch_num(2)
tensorboard = TensorboardMonitor(file_struct_manager,
is_continue=False,
network_name='PortraitSegmentation')
log = LogMonitor(file_struct_manager).write_final_metrics()
trainer.monitor_hub.add_monitor(tensorboard).add_monitor(log)
trainer.enable_best_states_saving(
lambda: np.mean(train_stage.get_losses()))
trainer.enable_lr_decaying(
coeff=0.5,
patience=10,
target_val_clbk=lambda: np.mean(train_stage.get_losses()))
trainer.add_on_epoch_end_callback(
lambda: tensorboard.update_scalar('params/lr',
trainer.data_processor().get_lr()))
trainer.train()
def test_savig_best_states(self):
fsm = FileStructManager(base_dir=self.base_dir, is_continue=False)
model = SimpleModel()
metrics_processor = MetricsProcessor()
stages = [TrainStage(TestDataProducer([[{'data': torch.rand(1, 3), 'target': torch.rand(1)}
for _ in list(range(20))]]), metrics_processor)]
trainer = Trainer(TrainConfig(model, stages, SimpleLoss(), torch.optim.SGD(model.parameters(), lr=0.1)),
fsm).set_epoch_num(3).enable_best_states_saving(lambda: np.mean(stages[0].get_losses()))
checkpoint_file = os.path.join(self.base_dir, 'checkpoints', 'last', 'last_checkpoint.zip')
best_checkpoint_file = os.path.join(self.base_dir, 'checkpoints', 'best', 'best_checkpoint.zip')
class Val:
def __init__(self):
self.v = None
first_val = Val()
def on_epoch_end(val):
if val.v is not None and np.mean(stages[0].get_losses()) < val.v:
self.assertTrue(os.path.exists(best_checkpoint_file))
os.remove(best_checkpoint_file)
val.v = np.mean(stages[0].get_losses())
return
val.v = np.mean(stages[0].get_losses())
self.assertTrue(os.path.exists(checkpoint_file))
self.assertFalse(os.path.exists(best_checkpoint_file))
os.remove(checkpoint_file)
trainer.add_on_epoch_end_callback(lambda: on_epoch_end(first_val))
trainer.train()
def test_lr_decaying(self):
fsm = FileStructManager(base_dir=self.base_dir, is_continue=False)
model = SimpleModel()
metrics_processor = MetricsProcessor()
stages = [
TrainStage(
TestDataProducer([[{
'data': torch.rand(1, 3),
'target': torch.rand(1)
} for _ in list(range(20))]]), metrics_processor),
ValidationStage(
TestDataProducer([[{
'data': torch.rand(1, 3),
'target': torch.rand(1)
} for _ in list(range(20))]]), metrics_processor)
]
trainer = Trainer(
model,
TrainConfig(stages, SimpleLoss(),
torch.optim.SGD(model.parameters(), lr=0.1)),
fsm).set_epoch_num(10)
def target_value_clbk() -> float:
return 1
trainer.enable_lr_decaying(0.5, 3, target_value_clbk)
trainer.train()
self.assertAlmostEqual(trainer.data_processor().get_lr(),
0.1 * (0.5**3),
delta=1e-6)
def test_savig_states(self):
fsm = FileStructManager(base_dir=self.base_dir, is_continue=False)
model = SimpleModel()
metrics_processor = MetricsProcessor()
stages = [
TrainStage(
TestDataProducer([[{
'data': torch.rand(1, 3),
'target': torch.rand(1)
} for _ in list(range(20))]]), metrics_processor)
]
trainer = Trainer(
model,
TrainConfig(stages, SimpleLoss(),
torch.optim.SGD(model.parameters(), lr=0.1)),
fsm).set_epoch_num(3)
checkpoint_file = os.path.join(self.base_dir, 'checkpoints', 'last',
'last_checkpoint.zip')
def on_epoch_end():
self.assertTrue(os.path.exists(checkpoint_file))
os.remove(checkpoint_file)
trainer.add_on_epoch_end_callback(on_epoch_end)
trainer.train()
def test_base_ops(self):
fsm = FileStructManager(base_dir=self.base_dir, is_continue=False)
model = SimpleModel()
trainer = Trainer(TrainConfig(model, [], torch.nn.L1Loss(), torch.optim.SGD(model.parameters(), lr=1)),
fsm)
with self.assertRaises(Trainer.TrainerException):
trainer.train()
def train(config_type: type(BaseSegmentationTrainConfig)):
fsm = FileStructManager(base_dir=config_type.experiment_dir, is_continue=False)
config = config_type({'train': ['train_seg.npy'], 'val': 'val_seg.npy'})
trainer = Trainer(config, fsm, device=torch.device('cuda'))
tensorboard = TensorboardMonitor(fsm, is_continue=False)
trainer.monitor_hub.add_monitor(tensorboard)
trainer.set_epoch_num(300)
trainer.enable_lr_decaying(coeff=0.5, patience=10, target_val_clbk=lambda: np.mean(config.val_stage.get_losses()))
trainer.add_on_epoch_end_callback(lambda: tensorboard.update_scalar('params/lr', trainer.data_processor().get_lr()))
trainer.enable_best_states_saving(lambda: np.mean(config.val_stage.get_losses()))
trainer.add_stop_rule(lambda: trainer.data_processor().get_lr() < 1e-6)
trainer.train()
def train():
train_config = PoseNetTrainConfig()
file_struct_manager = FileStructManager(
base_dir=PoseNetTrainConfig.experiment_dir, is_continue=False)
trainer = Trainer(train_config, file_struct_manager, torch.device('cuda'))
trainer.set_epoch_num(EPOCH_NUM)
tensorboard = TensorboardMonitor(file_struct_manager, is_continue=False)
log = LogMonitor(file_struct_manager).write_final_metrics()
trainer.monitor_hub.add_monitor(tensorboard).add_monitor(log)
trainer.enable_best_states_saving(
lambda: np.mean(train_config.val_stage.get_losses()))
trainer.enable_lr_decaying(
coeff=0.5,
patience=10,
target_val_clbk=lambda: np.mean(train_config.val_stage.get_losses()))
trainer.add_on_epoch_end_callback(
lambda: tensorboard.update_scalar('params/lr',
trainer.data_processor().get_lr()))
trainer.train()
def __len__(self):
return len(self.dataset)
def __getitem__(self, item):
data, target = self.dataset[item]
return {'data': self.transforms(data), 'target': target}
if __name__ == '__main__':
fsm = FileStructManager(base_dir='data', is_continue=False)
model = Net()
train_dataset = DataProducer([MNISTDataset('data/dataset', True)],
batch_size=4,
num_workers=2)
validation_dataset = DataProducer([MNISTDataset('data/dataset', False)],
batch_size=4,
num_workers=2)
train_config = TrainConfig(
model,
[TrainStage(train_dataset),
ValidationStage(validation_dataset)], torch.nn.NLLLoss(),
torch.optim.SGD(model.parameters(), lr=1e-4, momentum=0.5))
trainer = Trainer(train_config, fsm,
torch.device('cuda:0')).set_epoch_num(5)
trainer.monitor_hub.add_monitor(TensorboardMonitor(fsm, is_continue=False))
trainer.train()