AttributeError: 'Tensor' has no attribute: 'backwards'

AttributeError: 'Tensor' has no attribute: 'backwards'

我将此问题发布给那些犯了与我相同的错误的人。我在尝试计算梯度时遇到此错误:

criterion = torch.nn.CrossEntropyLoss()
loss = criterion(y_hat, y_truth)
loss.backwards()

loss.backward(),不是loss.backwards()