How to repeat each list element n times in Python

Let’s say that we have the following list [1,2,3,4,5] and we want to repeat each element 3 times. Let’s see how we can do it in Python and numpy.

import numpy as np

x = [1,2,3,4,5]

# repeat each element 3 times
np.repeat(x,3)

And we get:

array([1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5])