dsplit() and tensor_split() in PyTorch

#pytorch #dsplit #tensorsplit #split

*Memos:

My post explains split(), hsplit() and vsplit().
My post explains chunk() and unbind().

dsplit() can split a 3D or more D tensor into one or more tensors depthwise as shown below:

*Memos:

dsplit() can be used with torch or a tensor.
The tensor of zero or more integers, floating-point numbers, complex numbers or boolean values can be used.
The 2nd argument(int, tuple of int or list of int) with torch or the 1st argument(int, tuple of int or list of int) or the 1st or more arguments(int) with a tensor is indices_or_sections(Required). *Don't use indices_or_sections= with torch or a tensor.
The total number of the zero or more elements of the one or more returned tensors changes.
The one or more returned tensors keep the dimension.

import torch

my_tensor = torch.tensor([[[0, 1, 2, 3],
                           [4, 5, 6, 7],
                           [8, 9, 10, 11]]])
torch.dsplit(my_tensor, 1)
my_tensor.dsplit(1)
# (tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]),)

torch.dsplit(my_tensor, 2)
# (tensor([[[0, 1], [4, 5], [8, 9]]]),
#  tensor([[[2, 3], [6, 7], [10, 11]]]))

torch.dsplit(my_tensor, 4)
# (tensor([[[0], [4], [8]]]),
#  tensor([[[1], [5], [9]]]),
#  tensor([[[2], [6], [10]]]),
#  tensor([[[3], [7], [11]]]))

torch.dsplit(my_tensor, (0,))
torch.dsplit(my_tensor, (-4,))
# (tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]))

torch.dsplit(my_tensor, (1,))
torch.dsplit(my_tensor, (-3,))
# (tensor([[[0], [4], [8]]]),
#  tensor([[[1, 2, 3], [5, 6, 7], [9, 10, 11]]]))

torch.dsplit(my_tensor, (2,))
torch.dsplit(my_tensor, (-2,))
# (tensor([[[0, 1], [4, 5], [8, 9]]]),
#  tensor([[[2, 3], [6, 7], [10, 11]]]))

torch.dsplit(my_tensor, (3,))
torch.dsplit(my_tensor, (-1,))
# (tensor([[[0, 1, 2], [4, 5, 6], [8, 9, 10]]]),
#  tensor([[[3], [7], [11]]]))

torch.dsplit(my_tensor, (4,))
# (tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64))

torch.dsplit(my_tensor, (0, 0))
torch.dsplit(my_tensor, (0, -4))
# (tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]))

torch.dsplit(my_tensor, (0, 1))
torch.dsplit(my_tensor, (0, -3))
# (tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0], [4], [8]]]),
#  tensor([[[1, 2, 3], [5, 6, 7], [9, 10, 11]]]))

torch.dsplit(my_tensor, (0, 2))
torch.dsplit(my_tensor, (0, -2))
# (tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0, 1], [4, 5], [8, 9]]]),
#  tensor([[[2, 3], [6, 7], [10, 11]]]))

torch.dsplit(my_tensor, (0, 3))
torch.dsplit(my_tensor, (0, -1))
# (tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0, 1, 2], [4, 5, 6], [8, 9, 10]]]),
#  tensor([[[3], [7], [11]]]))

torch.dsplit(my_tensor, (0, 4))
# (tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64))

torch.dsplit(my_tensor, (1, 0))
torch.dsplit(my_tensor, (1, -4))
# (tensor([[[0], [4], [8]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]))

torch.dsplit(my_tensor, (1, 1))
torch.dsplit(my_tensor, (1, -3))
# (tensor([[[0], [4], [8]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[1, 2, 3], [5, 6, 7], [9, 10, 11]]]))

torch.dsplit(my_tensor, (1, 2))
torch.dsplit(my_tensor, (1, -2))
# (tensor([[[0], [4], [8]]]),
#  tensor([[[1], [5], [9]]]),
#  tensor([[[2, 3], [6, 7], [10, 11]]]))

torch.dsplit(my_tensor, (1, 3))
torch.dsplit(my_tensor, (1, -1))
# (tensor([[[0], [4], [8]]]),
#  tensor([[[1, 2], [5, 6], [9, 10]]]),
#  tensor([[[3], [7], [11]]]))

torch.dsplit(my_tensor, (1, 4))
# (tensor([[[0], [4], [8]]]),
#  tensor([[[1, 2, 3], [5, 6, 7], [9, 10, 11]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64))

torch.dsplit(my_tensor, (2, 0))
torch.dsplit(my_tensor, (2, -4))
# (tensor([[[0, 1], [4, 5], [8, 9]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]))

torch.dsplit(my_tensor, (2, 1))
torch.dsplit(my_tensor, (2, -3))
# (tensor([[[0, 1], [4, 5], [8, 9]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[1, 2, 3], [5, 6, 7], [9, 10, 11]]]))

torch.dsplit(my_tensor, (2, 2))
torch.dsplit(my_tensor, (2, -2))
# (tensor([[[0, 1], [4, 5], [8, 9]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[2, 3], [6, 7], [10, 11]]]))

torch.dsplit(my_tensor, (2, 3))
torch.dsplit(my_tensor, (2, -1))
# (tensor([[[0, 1], [4, 5], [8, 9]]]),
#  tensor([[[2], [6], [10]]]),
#  tensor([[[3], [7], [11]]]))

torch.dsplit(my_tensor, (2, 4))
# (tensor([[[0, 1], [4, 5], [8, 9]]]),
#  tensor([[[2, 3], [6, 7], [10, 11]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64))

torch.dsplit(my_tensor, (3, 0))
torch.dsplit(my_tensor, (3, -4))
# (tensor([[[0, 1, 2], [4, 5, 6], [8, 9, 10]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]))

torch.dsplit(my_tensor, (3, 1))
torch.dsplit(my_tensor, (3, -3))
# (tensor([[[0, 1, 2], [4, 5, 6], [8, 9, 10]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[1, 2, 3], [5, 6, 7], [9, 10, 11]]]))

torch.dsplit(my_tensor, (3, 2))
torch.dsplit(my_tensor, (3, -2))
# (tensor([[[0, 1, 2], [4, 5, 6], [8, 9, 10]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[2, 3], [6, 7], [10, 11]]]))

torch.dsplit(my_tensor, (3, 3))
torch.dsplit(my_tensor, (3, -1))
# (tensor([[[0, 1, 2], [4, 5, 6], [8, 9, 10]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[3], [7], [11]]]))

torch.dsplit(my_tensor, (3, 4))
# (tensor([[[0, 1, 2], [4, 5, 6], [8, 9, 10]]]),
#  tensor([[[3], [7], [11]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64))

torch.dsplit(my_tensor, (4, 0))
torch.dsplit(my_tensor, (4, -4))
# (tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]))

torch.dsplit(my_tensor, (4, 1))
torch.dsplit(my_tensor, (4, -3))
# (tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[1, 2, 3], [5, 6, 7], [9, 10, 11]]]))

torch.dsplit(my_tensor, (4, 2))
torch.dsplit(my_tensor, (4, -2))
# (tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[2, 3], [6, 7], [10, 11]]]))

torch.dsplit(my_tensor, (4, 3))
torch.dsplit(my_tensor, (4, -1))
# (tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[3], [7], [11]]]))

torch.dsplit(my_tensor, (4, 4))
# (tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([], size=(1, 3, 0), dtype=torch.int64))

torch.dsplit(my_tensor, (0, 0, 0))
torch.dsplit(my_tensor, (0, 0, -4))
torch.dsplit(my_tensor, (0, -4, 0))
torch.dsplit(my_tensor, (0, -4, -4))
# (tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([], size=(1, 3, 0), dtype=torch.int64),
#  tensor([[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]]))
etc.

my_tensor = torch.tensor([[[False, True, 2., 3.],
                           [4., 5., 6., 7+0j],
                           [8+0j, 9+0j, 10+0j, 11+0j]]])
torch.dsplit(my_tensor, 1)
# (tensor([[[0.+0.j, 1.+0.j, 2.+0.j, 3.+0.j],
#           [4.+0.j, 5.+0.j, 6.+0.j, 7.+0.j],
#           [8.+0.j, 9.+0.j, 10.+0.j, 11.+0.j]]]),)

tensor_split() can split a 1D or more D tensor into one or more tensors as shown below:

*Memos:

tensor_split() can be used with torch and a tensor.
The tensor of zero or more integers, floating-point numbers, complex numbers or boolean values can be used.
The 2nd argument(int, tuple of int or list of int) with torch or the 1st argument(int, tuple of int or list of int) with a tensor is indices_or_sections. *Don't use indices_or_sections= with torch or a tensor.
The 3rd argument(int) with torch or the 2nd argument(int) with a tensor is dim(Optional-Default:0) which is a dimension.
The number of the zero or more elements of a tensor changes.
The total number of the zero or more elements of the one or more returned tensors changes.
The one or more returned tensors keep the dimension.

import torch

my_tensor = torch.tensor([[0, 1, 2, 3],
                          [4, 5, 6, 7],
                          [8, 9, 10, 11]])
torch.tensor_split(my_tensor, 1)
my_tensor.tensor_split(1)
torch.tensor_split(my_tensor, 1, dim=0)
my_tensor.tensor_split(1, dim=0)
torch.tensor_split(my_tensor, 1, dim=1)
my_tensor.tensor_split(1, dim=1)
torch.tensor_split(my_tensor, 1, dim=-1)
my_tensor.tensor_split(1, dim=-1)
torch.tensor_split(my_tensor, 1, dim=-2)
my_tensor.tensor_split(1, dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),)

torch.tensor_split(my_tensor, (1,))
torch.tensor_split(my_tensor, (1,), dim=0)
torch.tensor_split(my_tensor, (1,), dim=-2)
# (tensor([[0, 1, 2, 3]]),
#  tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (1,), dim=1)
torch.tensor_split(my_tensor, (1,), dim=-1)
# (tensor([[0], [4], [8]]),
#  tensor([[1, 2, 3], [5, 6, 7], [9, 10, 11]]))

torch.tensor_split(my_tensor, 2)
torch.tensor_split(my_tensor, (2,))
torch.tensor_split(my_tensor, 2, dim=0)
torch.tensor_split(my_tensor, (2,), dim=0)
torch.tensor_split(my_tensor, 2, dim=-2)
torch.tensor_split(my_tensor, (2,), dim=-2)
torch.tensor_split(my_tensor, (-1,))
torch.tensor_split(my_tensor, (-1,), dim=0)
torch.tensor_split(my_tensor, (-1,), dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
#  tensor([[8, 9, 10, 11]]))

torch.tensor_split(my_tensor, 2, dim=1)
torch.tensor_split(my_tensor, (2,), dim=1)
torch.tensor_split(my_tensor, 2, dim=-1)
torch.tensor_split(my_tensor, (2,), dim=-1)
# (tensor([[0, 1], [4, 5], [8, 9]]),
#  tensor([[2, 3], [6, 7], [10, 11]]))

torch.tensor_split(my_tensor, 3)
torch.tensor_split(my_tensor, 3, dim=0)
torch.tensor_split(my_tensor, 3, dim=-2)
torch.tensor_split(my_tensor, (1, 2))
torch.tensor_split(my_tensor, (1, 2), dim=0)
torch.tensor_split(my_tensor, (1, 2), dim=-2)
torch.tensor_split(my_tensor, (1, -1))
torch.tensor_split(my_tensor, (1, -1), dim=0)
torch.tensor_split(my_tensor, (1, -1), dim=-2)
torch.tensor_split(my_tensor, (-2, 2))
torch.tensor_split(my_tensor, (-2, 2), dim=0)
torch.tensor_split(my_tensor, (-2, 2), dim=-2)
torch.tensor_split(my_tensor, (-2, -1))
torch.tensor_split(my_tensor, (-2, -1), dim=0)
torch.tensor_split(my_tensor, (-2, -1), dim=-2)
# (tensor([[0, 1, 2, 3]]),
#  tensor([[4, 5, 6, 7]]),
#  tensor([[8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (3,), dim=0)
torch.tensor_split(my_tensor, (3,), dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
#  tensor([], size=(0, 4), dtype=torch.int64))

torch.tensor_split(my_tensor, (3,), dim=1)
torch.tensor_split(my_tensor, (3,), dim=-1)
torch.tensor_split(my_tensor, (-1,), dim=1)
torch.tensor_split(my_tensor, (-1,), dim=-1)
# (tensor([[0, 1, 2], [4, 5, 6], [8, 9, 10]]),
#  tensor([[3], [7], [11]]))

torch.tensor_split(my_tensor, 3, dim=1)
torch.tensor_split(my_tensor, 3, dim=-1)
torch.tensor_split(my_tensor, (2, 3), dim=1)
torch.tensor_split(my_tensor, (2, 3), dim=-1)
torch.tensor_split(my_tensor, (2, -1), dim=1)
torch.tensor_split(my_tensor, (2, -1), dim=-1)
torch.tensor_split(my_tensor, (-2, -1), dim=1)
torch.tensor_split(my_tensor, (-2, -1), dim=-1)
# (tensor([[0, 1], [4, 5], [8, 9]]),
#  tensor([[2], [6], [10]]),
#  tensor([[3], [7], [11]]))

torch.tensor_split(my_tensor, (0, 0))
torch.tensor_split(my_tensor, (0, 0), dim=0)
torch.tensor_split(my_tensor, (0, 0), dim=-2)
torch.tensor_split(my_tensor, (0, -3))
torch.tensor_split(my_tensor, (0, -3), dim=0)
torch.tensor_split(my_tensor, (0, -3), dim=-2)
torch.tensor_split(my_tensor, (-3, 0))
torch.tensor_split(my_tensor, (-3, 0), dim=0)
torch.tensor_split(my_tensor, (-3, 0), dim=-2)
torch.tensor_split(my_tensor, (-3, -3))
torch.tensor_split(my_tensor, (-3, -3), dim=0)
torch.tensor_split(my_tensor, (-3, -3), dim=-2)
torch.tensor_split(my_tensor, (-4, -4))
torch.tensor_split(my_tensor, (-4, -4), dim=0)
torch.tensor_split(my_tensor, (-4, -4), dim=-2)
# (tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (0, 0), dim=1)
torch.tensor_split(my_tensor, (0, 0), dim=-1)
torch.tensor_split(my_tensor, (0, -4), dim=1)
torch.tensor_split(my_tensor, (0, -4), dim=-1)
torch.tensor_split(my_tensor, (-4, -4), dim=1)
torch.tensor_split(my_tensor, (-4, -4), dim=-1)
# (tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (0, 1))
torch.tensor_split(my_tensor, (0, 1), dim=0)
torch.tensor_split(my_tensor, (0, 1), dim=-2)
torch.tensor_split(my_tensor, (0, -2))
torch.tensor_split(my_tensor, (0, -2), dim=0)
torch.tensor_split(my_tensor, (0, -2), dim=-2)
torch.tensor_split(my_tensor, (-3, 1))
torch.tensor_split(my_tensor, (-3, 1), dim=0)
torch.tensor_split(my_tensor, (-3, 1), dim=-2)
torch.tensor_split(my_tensor, (-3, -2))
torch.tensor_split(my_tensor, (-3, -2), dim=0)
torch.tensor_split(my_tensor, (-3, -2), dim=-2)
# (tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[0, 1, 2, 3]]),
#  tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (0, 1), dim=1)
torch.tensor_split(my_tensor, (0, 1), dim=-1)
torch.tensor_split(my_tensor, (0, -3), dim=1)
torch.tensor_split(my_tensor, (0, -3), dim=-1)
# (tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[0], [4], [8]]),
#  tensor([[1, 2, 3], [5, 6, 7], [9, 10, 11]]))

torch.tensor_split(my_tensor, (0, 2))
torch.tensor_split(my_tensor, (0, 2), dim=0)
torch.tensor_split(my_tensor, (0, 2), dim=-2)
torch.tensor_split(my_tensor, (0, -1))
torch.tensor_split(my_tensor, (0, -1), dim=0)
torch.tensor_split(my_tensor, (0, -1), dim=-2)
torch.tensor_split(my_tensor, (-3, 2))
torch.tensor_split(my_tensor, (-3, 2), dim=0)
torch.tensor_split(my_tensor, (-3, 2), dim=-2)
torch.tensor_split(my_tensor, (-3, -1))
torch.tensor_split(my_tensor, (-3, -1), dim=0)
torch.tensor_split(my_tensor, (-3, -1), dim=-2)
# (tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
#  tensor([[8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (0, 2), dim=1)
torch.tensor_split(my_tensor, (0, 2), dim=-1)
torch.tensor_split(my_tensor, (0, -2), dim=1)
torch.tensor_split(my_tensor, (0, -2), dim=-1)
# (tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[0, 1], [4, 5], [8, 9]]),
#  tensor([[2, 3], [6, 7], [10, 11]]))

torch.tensor_split(my_tensor, (0, 3))
torch.tensor_split(my_tensor, (0, 3), dim=0)
torch.tensor_split(my_tensor, (0, 3), dim=-2)
torch.tensor_split(my_tensor, (-3, 3))
torch.tensor_split(my_tensor, (-3, 3), dim=0)
torch.tensor_split(my_tensor, (-3, 3), dim=-2)
# (tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
#  tensor([], size=(0, 4), dtype=torch.int64))

torch.tensor_split(my_tensor, (0, 3), dim=1)
torch.tensor_split(my_tensor, (0, 3), dim=-1)
torch.tensor_split(my_tensor, (0, -1), dim=1)
torch.tensor_split(my_tensor, (0, -1), dim=-1)
# (tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[0, 1, 2], [4, 5, 6], [8, 9, 10]]),
#  tensor([[3], [7], [11]]))

torch.tensor_split(my_tensor, (0, 4), dim=1)
torch.tensor_split(my_tensor, (0, 4), dim=-1)
torch.tensor_split(my_tensor, (-4, 4), dim=1)
torch.tensor_split(my_tensor, (-4, 4), dim=-1)
# (tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
#  tensor([], size=(3, 0), dtype=torch.int64))

torch.tensor_split(my_tensor, (1, 0))
torch.tensor_split(my_tensor, (1, 0), dim=0)
torch.tensor_split(my_tensor, (1, 0), dim=-2)
torch.tensor_split(my_tensor, (1, -3))
torch.tensor_split(my_tensor, (1, -3), dim=0)
torch.tensor_split(my_tensor, (1, -3), dim=-2)
torch.tensor_split(my_tensor, (-2, 0))
torch.tensor_split(my_tensor, (-2, 0), dim=0)
torch.tensor_split(my_tensor, (-2, 0), dim=-2)
torch.tensor_split(my_tensor, (-2, -3))
torch.tensor_split(my_tensor, (-2, -3), dim=0)
torch.tensor_split(my_tensor, (-2, -3), dim=-2)
# (tensor([[0, 1, 2, 3]]),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (1, 0), dim=1)
torch.tensor_split(my_tensor, (1, 0), dim=-1)
torch.tensor_split(my_tensor, (1, -4), dim=1)
torch.tensor_split(my_tensor, (1, -4), dim=-1)
torch.tensor_split(my_tensor, (-3, 0), dim=1)
torch.tensor_split(my_tensor, (-3, 0), dim=-1)
torch.tensor_split(my_tensor, (-3, -4), dim=1)
torch.tensor_split(my_tensor, (-3, -4), dim=-1)
# (tensor([[0], [4], [8]]),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (1, 1))
torch.tensor_split(my_tensor, (1, 1), dim=0)
torch.tensor_split(my_tensor, (1, 1), dim=-2)
torch.tensor_split(my_tensor, (1, -2))
torch.tensor_split(my_tensor, (1, -2), dim=0)
torch.tensor_split(my_tensor, (1, -2), dim=-2)
torch.tensor_split(my_tensor, (-2, 1))
torch.tensor_split(my_tensor, (-2, 1), dim=0)
torch.tensor_split(my_tensor, (-2, 1), dim=-2)
torch.tensor_split(my_tensor, (-2, -2))
torch.tensor_split(my_tensor, (-2, -2), dim=0)
torch.tensor_split(my_tensor, (-2, -2), dim=-2)
# (tensor([[0, 1, 2, 3]]),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (1, 1), dim=1)
torch.tensor_split(my_tensor, (1, 1), dim=-1)
torch.tensor_split(my_tensor, (1, -3), dim=1)
torch.tensor_split(my_tensor, (1, -3), dim=-1)
torch.tensor_split(my_tensor, (-3, 1), dim=1)
torch.tensor_split(my_tensor, (-3, 1), dim=-1)
torch.tensor_split(my_tensor, (-3, -3), dim=1)
torch.tensor_split(my_tensor, (-3, -3), dim=-1)
# (tensor([[0], [4], [8]]),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[1, 2, 3], [5, 6, 7], [9, 10, 11]]))

torch.tensor_split(my_tensor, (1, 2), dim=1)
torch.tensor_split(my_tensor, (1, 2), dim=-1)
torch.tensor_split(my_tensor, (1, -2), dim=1)
torch.tensor_split(my_tensor, (1, -2), dim=-1)
torch.tensor_split(my_tensor, (-3, 2), dim=1)
torch.tensor_split(my_tensor, (-3, 2), dim=-1)
torch.tensor_split(my_tensor, (-3, -2), dim=1)
torch.tensor_split(my_tensor, (-3, -2), dim=-1)
# (tensor([[0], [4], [8]]),
#  tensor([[1], [5], [9]]),
#  tensor([[2, 3], [6, 7], [10, 11]]))

torch.tensor_split(my_tensor, (1, 3))
torch.tensor_split(my_tensor, (1, 3), dim=0)
torch.tensor_split(my_tensor, (1, 3), dim=-2)
# (tensor([[0, 1, 2, 3]]),
#  tensor([[4, 5, 6, 7], [8, 9, 10, 11]]),
#  tensor([], size=(0, 4), dtype=torch.int64))

torch.tensor_split(my_tensor, (1, 3), dim=1)
torch.tensor_split(my_tensor, (1, 3), dim=-1)
torch.tensor_split(my_tensor, (1, -1), dim=1)
torch.tensor_split(my_tensor, (1, -1), dim=-1)
torch.tensor_split(my_tensor, (-3, 3), dim=1)
torch.tensor_split(my_tensor, (-3, 3), dim=-1)
torch.tensor_split(my_tensor, (-3, -1), dim=1)
torch.tensor_split(my_tensor, (-3, -1), dim=-1)
# (tensor([[0], [4], [8]]),
#  tensor([[1, 2], [5, 6], [9, 10]]),
#  tensor([[3], [7], [11]]))

torch.tensor_split(my_tensor, (1, 4), dim=1)
torch.tensor_split(my_tensor, (1, 4), dim=-1)
torch.tensor_split(my_tensor, (-3, 4), dim=1)
torch.tensor_split(my_tensor, (-3, 4), dim=-1)
# (tensor([[0], [4], [8]]),
#  tensor([[1, 2, 3], [5, 6, 7], [9, 10, 11]]),
#  tensor([], size=(3, 0), dtype=torch.int64))

torch.tensor_split(my_tensor, (2, 0))
torch.tensor_split(my_tensor, (2, 0), dim=0)
torch.tensor_split(my_tensor, (2, 0), dim=-2)
torch.tensor_split(my_tensor, (2, -3))
torch.tensor_split(my_tensor, (2, -3), dim=0)
torch.tensor_split(my_tensor, (2, -3), dim=-2)
torch.tensor_split(my_tensor, (-1, 0))
torch.tensor_split(my_tensor, (-1, 0), dim=0)
torch.tensor_split(my_tensor, (-1, 0), dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (2, 0), dim=1)
torch.tensor_split(my_tensor, (2, 0), dim=-1)
torch.tensor_split(my_tensor, (2, -4), dim=1)
torch.tensor_split(my_tensor, (2, -4), dim=-1)
torch.tensor_split(my_tensor, (-2, 0), dim=1)
torch.tensor_split(my_tensor, (-2, 0), dim=-1)
torch.tensor_split(my_tensor, (-2, -4), dim=1)
torch.tensor_split(my_tensor, (-2, -4), dim=-1)
# (tensor([[0, 1], [4, 5], [8, 9]]),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (2, 1))
torch.tensor_split(my_tensor, (2, 1), dim=0)
torch.tensor_split(my_tensor, (2, 1), dim=-2)
torch.tensor_split(my_tensor, (2, -2))
torch.tensor_split(my_tensor, (2, -2), dim=0)
torch.tensor_split(my_tensor, (2, -2), dim=-2)
torch.tensor_split(my_tensor, (-1, 1))
torch.tensor_split(my_tensor, (-1, 1), dim=0)
torch.tensor_split(my_tensor, (-1, 1), dim=-2)
torch.tensor_split(my_tensor, (-1, -2))
torch.tensor_split(my_tensor, (-1, -2), dim=0)
torch.tensor_split(my_tensor, (-1, -2), dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (2, 2))
torch.tensor_split(my_tensor, (2, 2), dim=0)
torch.tensor_split(my_tensor, (2, 2), dim=-2)
torch.tensor_split(my_tensor, (2, -1))
torch.tensor_split(my_tensor, (2, -1), dim=0)
torch.tensor_split(my_tensor, (2, -1), dim=-2)
torch.tensor_split(my_tensor, (-1, 2))
torch.tensor_split(my_tensor, (-1, 2), dim=0)
torch.tensor_split(my_tensor, (-1, 2), dim=-2)
torch.tensor_split(my_tensor, (-1, -1))
torch.tensor_split(my_tensor, (-1, -1), dim=0)
torch.tensor_split(my_tensor, (-1, -1), dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (2, 2), dim=1)
torch.tensor_split(my_tensor, (2, 2), dim=-1)
torch.tensor_split(my_tensor, (2, -2), dim=1)
torch.tensor_split(my_tensor, (2, -2), dim=-1)
torch.tensor_split(my_tensor, (-2, 2), dim=1)
torch.tensor_split(my_tensor, (-2, 2), dim=-1)
torch.tensor_split(my_tensor, (-2, -2), dim=1)
torch.tensor_split(my_tensor, (-2, -2), dim=-1)
# (tensor([[0, 1], [4, 5], [8, 9]]),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[2, 3], [6, 7], [10, 11]]))

torch.tensor_split(my_tensor, (2, 3))
torch.tensor_split(my_tensor, (2, 3), dim=0)
torch.tensor_split(my_tensor, (2, 3), dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
#  tensor([[8, 9, 10, 11]]),
#  tensor([], size=(0, 4), dtype=torch.int64))

torch.tensor_split(my_tensor, (2, 4), dim=1)
torch.tensor_split(my_tensor, (2, 4), dim=-1)
torch.tensor_split(my_tensor, (-2, 4), dim=1)
torch.tensor_split(my_tensor, (-2, 4), dim=-1)
# (tensor([[0, 1], [4, 5], [8, 9]]),
#  tensor([[2, 3], [6, 7], [10, 11]]),
#  tensor([], size=(3, 0), dtype=torch.int64))

torch.tensor_split(my_tensor, (3, 0))
torch.tensor_split(my_tensor, (3, 0), dim=0)
torch.tensor_split(my_tensor, (3, 0), dim=-2)
torch.tensor_split(my_tensor, (3, -3))
torch.tensor_split(my_tensor, (3, -3), dim=0)
torch.tensor_split(my_tensor, (3, -3), dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (3, 0), dim=1)
torch.tensor_split(my_tensor, (3, 0), dim=-1)
torch.tensor_split(my_tensor, (3, -4), dim=1)
torch.tensor_split(my_tensor, (3, -4), dim=-1)
torch.tensor_split(my_tensor, (-1, 0), dim=1)
torch.tensor_split(my_tensor, (-1, 0), dim=-1)
torch.tensor_split(my_tensor, (-1, -4), dim=1)
torch.tensor_split(my_tensor, (-1, -4), dim=-1)
# (tensor([[0, 1, 2], [4, 5, 6], [8, 9, 10]]),
# tensor([], size=(3, 0), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (3, 1))
torch.tensor_split(my_tensor, (3, 1), dim=0)
torch.tensor_split(my_tensor, (3, 1), dim=-2)
torch.tensor_split(my_tensor, (3, -2))
torch.tensor_split(my_tensor, (3, -2), dim=0)
torch.tensor_split(my_tensor, (3, -2), dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (3, 1), dim=1)
torch.tensor_split(my_tensor, (3, 1), dim=-1)
torch.tensor_split(my_tensor, (3, -3), dim=1)
torch.tensor_split(my_tensor, (3, -3), dim=-1)
torch.tensor_split(my_tensor, (-1, 1), dim=1)
torch.tensor_split(my_tensor, (-1, 1), dim=-1)
# (tensor([[0, 1, 2], [4, 5, 6], [8, 9, 10]]),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[1, 2, 3], [5, 6, 7], [9, 10, 11]]))

torch.tensor_split(my_tensor, (3, 2))
torch.tensor_split(my_tensor, (3, 2), dim=0)
torch.tensor_split(my_tensor, (3, 2), dim=-2)
torch.tensor_split(my_tensor, (3, -1))
torch.tensor_split(my_tensor, (3, -1), dim=0)
torch.tensor_split(my_tensor, (3, -1), dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (3, 2), dim=1)
torch.tensor_split(my_tensor, (3, 2), dim=-1)
torch.tensor_split(my_tensor, (3, -2), dim=1)
torch.tensor_split(my_tensor, (3, -2), dim=-1)
torch.tensor_split(my_tensor, (-1, 2), dim=1)
torch.tensor_split(my_tensor, (-1, 2), dim=-1)
torch.tensor_split(my_tensor, (-1, -2), dim=1)
torch.tensor_split(my_tensor, (-1, -2), dim=-1)
# (tensor([[0, 1, 2], [4, 5, 6], [8, 9, 10]]),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[2, 3], [6, 7], [10, 11]]))

torch.tensor_split(my_tensor, (3, 3))
torch.tensor_split(my_tensor, (3, 3), dim=0)
torch.tensor_split(my_tensor, (3, 3), dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([], size=(0, 4), dtype=torch.int64))

torch.tensor_split(my_tensor, (3, 3), dim=1)
torch.tensor_split(my_tensor, (3, 3), dim=-1)
torch.tensor_split(my_tensor, (3, -1), dim=1)
torch.tensor_split(my_tensor, (3, -1), dim=-1)
torch.tensor_split(my_tensor, (-1, -1), dim=1)
torch.tensor_split(my_tensor, (-1, -1), dim=-1)
# (tensor([[0, 1, 2], [4, 5, 6], [8, 9, 10]]),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[3], [7], [11]]))

torch.tensor_split(my_tensor, (3, 4), dim=1)
torch.tensor_split(my_tensor, (3, 4), dim=-1)
torch.tensor_split(my_tensor, (-1, 4), dim=1)
torch.tensor_split(my_tensor, (-1, 4), dim=-1)
# (tensor([[0, 1, 2], [4, 5, 6], [8, 9, 10]]),
#  tensor([[3], [7], [11]]),
#  tensor([], size=(3, 0), dtype=torch.int64))

torch.tensor_split(my_tensor, (4, 4), dim=1)
torch.tensor_split(my_tensor, (4, 4), dim=-1)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([], size=(3, 0), dtype=torch.int64))

torch.tensor_split(my_tensor, (4, -4), dim=1)
torch.tensor_split(my_tensor, (4, -4), dim=-1)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))

torch.tensor_split(my_tensor, (2, -3), dim=1)
torch.tensor_split(my_tensor, (2, -3), dim=-1)
torch.tensor_split(my_tensor, (-2, 1), dim=1)
torch.tensor_split(my_tensor, (-2, 1), dim=-1)
torch.tensor_split(my_tensor, (-2, -3), dim=1)
torch.tensor_split(my_tensor, (-2, -3), dim=-1)
# (tensor([[0, 1], [4, 5], [8, 9]]),
#  tensor([], size=(3, 0), dtype=torch.int64),
#  tensor([[1, 2, 3], [5, 6, 7], [9, 10, 11]]))

torch.tensor_split(my_tensor, (0, 0, 0))
torch.tensor_split(my_tensor, (0, 0, 0), dim=0)
torch.tensor_split(my_tensor, (0, 0, 0), dim=-2)
# (tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([], size=(0, 4), dtype=torch.int64),
#  tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))
etc.

my_tensor = torch.tensor([[False, True, 2., 3.],
                          [4., 5., 6., 7+0j], 
                          [8+0j, 9+0j, 10+0j, 11+0j]])
torch.tensor_split(my_tensor, 1)
torch.tensor_split(my_tensor, 1, dim=0)
torch.tensor_split(my_tensor, 1, dim=1)
torch.tensor_split(my_tensor, 1, dim=-1)
torch.tensor_split(my_tensor, 1, dim=-2)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),)

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dsplit() and tensor_split() in PyTorch

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