Solved by LeviViana in post #4 
              
              
                You can check it by yourself  ! 
import torch
value = torch.rand(3, 4, 5, 6, 7)
a = 2
b = 1
value.select(0, a).narrow(0, 0, b).equal(value[a, :b, ...]) # True
value.narrow(1, 0, b).select(0, a).equal(value[a, :b, ...]) # True