Env
import torch
\( \mathsf{X} \)
  tensor
X = torch.arange(24).reshape(2, 3, 4)
tensor([[[ 0, 1, 2, 3], [ 4, 5, 6, 7], [ 8, 9, 10, 11]], [[12, 13, 14, 15], [16, 17, 18, 19], [20, 21, 22, 23]]])