How to make a checkerboard in numpy?

Question

I\'m using numpy to initialize a pixel array to a gray checkerboard (the classic representation for \"no pixels\", or transparent). It seems like there ought to be a whizzy

Answer 1

Numpy's Tile function to get checkerboard array of size n*n

import numpy

n = 4

list_0_1 = [ [ 0, 1], [ 1, 0] ]

checkerboard = numpy.tile( list_0_1, ( n//2, n//2) ) 

print( checkerboard)

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