Make a checkerboard

Python
1

I am making a checkerboard pattern of zeroes and ones. It would be an 8x8 array.
So far, the loop adds lists of 0,1,0,1,0,1,0,1 and 1,0,1,0,1,0,1,0 into an empty list.

z_first = np.tile([0,1], 4)
o_first = np.tile([1,0], 4)

row_number = 0
board = []
while row_number < 8:
    if row_number % 2 == 0:
        board.append(list(z_first))
    else:
        board.append(list(o_first))
    row_number += 1
    np.array(board)
print(board)

The output:

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

board.shape throws the error “'List 'object has no attribute ‘shape.’” The checkerboard is a list despite using np.array on it. How would I make this a 2D array?

2

np.array() returns an array. You are discarding the return value by calling np.array(board) only.

3

Adding the line board = np.array(board) made it an array.