Reverse operation of torch.cat
Suppose I have a tensor like [A,A,A,A...,A].
How can I quickly obtain [[A],[A],[A],...,[A]] as a tensor in torch?

You can use torch.chunk as the inverse of cat, but it looks like you want unsqueeze(1):
A = torch.randn(2, 3)
A_rep = (A, A, A, A, A, A, A, A)
catted = torch.cat(A_rep)

#uncatted = torch.chunk(catted, len(A_rep))
catted.unsqueeze(1)

