`scipy.signal._arraytools:zero_ext`

Signature

def zero_ext(x, n, axis = -1)

Zero padding at the boundaries of an array

Generate a new ndarray that is a zero-padded extension of x along an axis.

x : ndarray: The array to be extended.
n : int: The number of elements by which to extend x at each end of the axis.
axis : int, optional: The axis along which to extend x. Default is -1.

import numpy as np
from scipy.signal._arraytools import zero_ext
a = np.array([[1, 2, 3, 4, 5], [0, 1, 4, 9, 16]])
zero_ext(a, 2)

✓

array([[ 0,  0,  1,  2,  3,  4,  5,  0,  0],
       [ 0,  0,  0,  1,  4,  9, 16,  0,  0]])