I want to create a tensor that looks like this:
[ [0, 1, 2, 3, ...],
  [0, 1, 2, 3, ...],
  ...               ]

I know I can do this with a loop and torch.arange:
tc.stack([tc.arange(0, L) for i in range(B)])

However, this method can be inefficient because of big python loops. I’m wondering is there a way to achieve this without loops?
Thanks