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Python Pytorch eye() method
• Last Updated : 22 Apr, 2020

PyTorch is an open-source machine learning library developed by Facebook. It is used for deep neural network and natural language processing purposes.

The function `torch.eye()` returns a returns a 2-D tensor of size n*m with ones on the diagonal and zeros elsewhere.

Syntax: torch.eye(n, m, out=None)

Parameters:
n: the number of rows
m: the number of columns. Default – n
out (Tensor, optional): the output tensor

Return type: A 2-D tensor

Code #1:

 `# Importing the PyTorch library``import` `torch`` ` ` ` `# Applying the eye function and``# storing the resulting tensor in 'a'``a ``=` `torch.eye(``3``, ``4``)``print``(``"a = "``, a)`` ` `b ``=` `torch.eye(``3``, ``3``)``print``(``"b = "``, b)`` ` `c ``=` `torch.eye(``5``, ``1``)``print``(``"c = "``, c)`

Output:

```a =  tensor([[1., 0., 0., 0.],
[0., 1., 0., 0.],
[0., 0., 1., 0.]])
b =  tensor([[1., 0., 0.],
[0., 1., 0.],
[0., 0., 1.]])
c =  tensor([[1.],
[0.],
[0.],
[0.],
[0.]])

```

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