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

I'd use the Kronecker product kron:

np.kron([[1, 0] * 4, [0, 1] * 4] * 4, np.ones((10, 10)))

The checkerboard in this example has 2*4=8 fields of size 10x10 in each direction.