examples/files/img_classification.py
from piepline.builtin.monitors.tensorboard import TensorboardMonitor
from piepline import DataProducer, AbstractDataset, TrainConfig, TrainStage,\
ValidationStage, Trainer, FileStructManager
import torch
from torch import nn
import torch.nn.functional as F
from torchvision import datasets, transforms
class Net(nn.Module):
def __init__(self):
super(Net, self).__init__()
self.conv1 = nn.Conv2d(1, 20, 5, 1)
self.conv2 = nn.Conv2d(20, 50, 5, 1)
self.fc1 = nn.Linear(4 * 4 * 50, 500)
self.fc2 = nn.Linear(500, 10)
def forward(self, x):
x = F.relu(self.conv1(x))
x = F.max_pool2d(x, 2, 2)
x = F.relu(self.conv2(x))
x = F.max_pool2d(x, 2, 2)
x = x.view(-1, 4 * 4 * 50)
x = F.relu(self.fc1(x))
x = self.fc2(x)
return F.log_softmax(x, dim=1)
class MNISTDataset(AbstractDataset):
transforms = transforms.Compose([transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))])
def __init__(self, data_dir: str, is_train: bool):
self.dataset = datasets.MNIST(data_dir, train=is_train, download=True)
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()