.cpu().detach().numpy() vs .data.cpu().numpy()

What is the difference between .cpu().detach().numpy() and .data.cpu().numpy() ?

When should I used one of these over the other?

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.data is an old api and should not be used anymore.
So the first one is the right way to go.

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How about .cpu().detach() vs .detach().cpu() ?

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The end result is the same.
The second one is going to be imperceptibly faster because you don’t track the gradients for the cpu() op. But nothing else.

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Thank you very much. That answers my question exactly.
BTW, I don’t know if it’s allowed or forbid. May I ask you to look at another question I post?