How do I use multiple computing devices?

[zhang090210]

I see a parameter device
Optional[str or torch.device], default=None
However, it may be possible to specify the calculation card number by entering [1, 2, 3, 4]

[dholzmueller]

I think you can only use one device at once, but if you want to use the GPU with index 2, you can use "cuda:2". Note that indices start from zero.