71 lines
1.9 KiB
Python
71 lines
1.9 KiB
Python
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import torch
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from torch import nn
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from torch import optim
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from torch.utils.data import DataLoader
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from data import FashionDataset
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from tqdm import tqdm
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from utils import Stage
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class Batch:
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def __init__(
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self,
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stage: Stage,
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model: nn.Module,
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device,
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loader: DataLoader,
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optimizer: optim.Optimizer,
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criterion: nn.Module,
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):
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"""todo"""
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self.stage = stage
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self.device = device
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self.model = model.to(device)
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self.loader = loader
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self.criterion = criterion
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self.optimizer = optimizer
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self.loss = 0
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def run(self, desc):
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self.model.train()
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epoch = 0
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for epoch, (x, y) in enumerate(tqdm(self.loader, desc=desc)):
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self.optimizer.zero_grad()
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loss = self._run_batch((x, y))
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loss.backward() # Send loss backwards to accumulate gradients
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self.optimizer.step() # Perform a gradient update on the weights of the mode
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self.loss += loss.item()
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def _run_batch(self, sample):
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true_x, true_y = sample
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true_x, true_y = true_x.to(self.device), true_y.to(self.device)
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pred_y = self.model(true_x)
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loss = self.criterion(pred_y, true_y)
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return loss
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def main():
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model = nn.Conv2d(1, 64, 3)
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criterion = torch.nn.CrossEntropyLoss()
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optimizer = torch.optim.Adam(model.parameters(), lr=2e-4)
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path = "fashion-mnist_train.csv"
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dataset = FashionDataset(path)
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batch_size = 16
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num_workers = 1
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loader = torch.utils.data.DataLoader(
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dataset, batch_size=batch_size, shuffle=False, num_workers=num_workers
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)
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batch = Batch(
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Stage.TRAIN,
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device=torch.device("cpu"),
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model=model,
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criterion=criterion,
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optimizer=optimizer,
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loader=loader,
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)
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batch.run("test")
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if __name__ == "__main__":
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main()
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