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Python | numpy.fill_diagonal() method
• Last Updated : 27 Sep, 2019

With the help of `numpy.fill_diagonal()` method, we can get filled the diagonals of numpy array with the value passed as the parameter in `numpy.fill_diagonal()` method.

Syntax : `numpy.fill_diagonal(array, value)`
Return : Return the filled value in the diagonal of an array.

Example #1 :
In this example we can see that by using `numpy.fill_diagonal()` method, we are able to get the diagonals filled with the values passed as parameter.

 `# import numpy``import` `numpy as np`` ` `# using numpy.fill_diagonal() method``array ``=` `np.array([[``1``, ``2``], [``2``, ``1``]])``np.fill_diagonal(array, ``5``)`` ` `print``(array)`

Output :

[[5 2]
[2 5]]

Example #2 :

 `# import numpy``import` `numpy as np`` ` `# using numpy.fill_diagonal() method``array ``=` `np.zeros((``3``, ``3``), ``int``)``np.fill_diagonal(array, ``1``)`` ` `print``(array)`

Output :

[[1 0 0]
[0 1 0]
[0 0 1]]

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