直接外包比較快.

去google啊

from cv2 import cv2 as cv 
import numpy as np 

chess_size = 512
unit = int(chess_size / 8)
chess_shape = (chess_size,chess_size)

chess = np.ones((chess_shape),dtype=np.uint8)
print(chess.shape)

for i in range(8):
    for j in range(8):
        #判斷第幾行第一格為黑或白
        if i % 2 == 0:
            #判斷是否為第一格
            if j % 2 == 0:
                chess[i*unit:(i+1)*unit,j*unit:(j+1)*unit] = 0
            elif j % 2 == 1:
                chess[i*unit:(i+1)*unit,j*unit:(j+1)*unit] = 255
        elif i % 2 == 1:
            #判斷是否為第一格
            if j % 2 == 0:
                chess[i*unit:(i+1)*unit,j*unit:(j+1)*unit] = 255
            elif j % 2 == 1:
                chess[i*unit:(i+1)*unit,j*unit:(j+1)*unit] = 0

#cv.imshow('chess',chess)
#cv.waitKey()
#cv.destroyAllWindows()
cv.imwrite('chess.png',chess)