Implementing the training step
In this exercise, you'll implement the training_step() method in a PyTorch Lightning module designed for an image classification task.
Your implementation should unpack a batch of images and labels, compute the model predictions via the forward pass, calculate the cross entropy loss, and log the training loss.
この演習はコースの一部です
Scalable AI Models with PyTorch Lightning
演習の手順
- Ensure that you compute predictions using the forward pass.
- Calculate the cross entropy loss.
- Log the training loss.
実践的なインタラクティブ演習
このサンプルコードを完成させて、この演習に挑戦してみましょう。
from torch.nn.functional import cross_entropy
def training_step(self, batch, batch_idx):
x, y = batch
# Ensure that you compute predictions using the forward pass
y_hat = ____
# Calculate the cross entropy loss
loss = ____
# Log the loss
self.____("train_loss", loss)
return loss