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import numpy as np
import torch 
torch.tensor(([1,2,3,4],[5,6,7,8]))
tensor([[1, 2, 3, 4],
        [5, 6, 7, 8]])
torch.zeros(3,3)
tensor([[0., 0., 0.],
        [0., 0., 0.],
        [0., 0., 0.]])
torch.ones(4,4)
tensor([[1., 1., 1., 1.],
        [1., 1., 1., 1.],
        [1., 1., 1., 1.],
        [1., 1., 1., 1.]])
torch.eye(4)
tensor([[1., 0., 0., 0.],
        [0., 1., 0., 0.],
        [0., 0., 1., 0.],
        [0., 0., 0., 1.]])