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

n = int(input())
import numpy as np
m=int(n/2)
a=np.array(([0,1]*m+[1,0]*m)*m).reshape((n,n))

print (a)

So if input is n = 4 then output would be like:

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