89 lines
2.5 KiB
Python
89 lines
2.5 KiB
Python
import torch
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import torch.nn as nn
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import torch.optim as optim
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from torchvision import models
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from omegaconf import DictConfig, OmegaConf
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from data.dataset import get_dataset
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from utils import get_model
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import time
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import hydra
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device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
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@hydra.main(version_base=None, config_path="./config", config_name="config")
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def main(cfg: DictConfig) -> None:
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model=get_model(cfg)
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model.train()
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train_dataloader,test_dataloader,train_dataset,test_dataset=get_dataset(cfg)
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num_epochs = cfg.classifier.num_epochs
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criterion = nn.CrossEntropyLoss()
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optimizer = optim.SGD(model.parameters(), lr=cfg.classifier.lr, momentum=cfg.classifier.momentum)
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start_time = time.time()
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for epoch in range(num_epochs):
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model.train()
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running_loss = 0
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running_corrects = 0
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for i, (inputs, labels) in enumerate(train_dataloader):
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inputs = inputs.to(device)
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labels = labels.to(device)
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optimizer.zero_grad()
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outputs = model(inputs)
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_, preds = torch.max(outputs, 1)
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loss = criterion(outputs, labels)
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loss.backward()
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optimizer.step()
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running_loss += loss.item() * inputs.size(0)
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running_corrects += torch.sum(preds == labels.data)
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epoch_loss = running_loss / len(train_dataset)
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epoch_acc = running_corrects / len(train_dataset) * 100.
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print('[Train #{}] Loss: {:.4f} Acc: {:.4f}% Time: {:.4f}s'.format(epoch, epoch_loss, epoch_acc, time.time() - start_time))
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model.eval()
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with torch.no_grad():
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running_loss = 0.
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running_corrects = 0
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for inputs, labels in test_dataloader:
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inputs = inputs.to(device)
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labels = labels.to(device)
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outputs = model(inputs)
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_, preds = torch.max(outputs, 1)
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loss = criterion(outputs, labels)
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running_loss += loss.item() * inputs.size(0)
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running_corrects += torch.sum(preds == labels.data)
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epoch_loss = running_loss / len(test_dataset)
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epoch_acc = running_corrects / len(test_dataset) * 100.
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print('[Test #{}] Loss: {:.4f} Acc: {:.4f}% Time: {:.4f}s'.format(epoch, epoch_loss, epoch_acc, time.time() - start_time))
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save_path = '{}/{}_{}.pth'.format(cfg.paths.classifier, cfg.classifier.model, cfg.dataset)
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torch.save(model.state_dict(), save_path)
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if __name__ == "__main__":
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main() |