我正在使用numpy将像素阵列初始化为灰色棋盘("无像素"或透明的经典表示).看起来应该有一种奇怪的方式来做numpy的惊人的阵列分配/切片/切割操作,但这是我提出的最好的:
w, h = 600, 800
sq = 15 # width of each checker-square
self.pix = numpy.zeros((w, h, 3), dtype=numpy.uint8)
# Make a checkerboard
row = [[(0x99,0x99,0x99),(0xAA,0xAA,0xAA)][(i//sq)%2] for i in range(w)]
self.pix[[i for i in range(h) if (i//sq)%2 == 0]] = row
row = [[(0xAA,0xAA,0xAA),(0x99,0x99,0x99)][(i//sq)%2] for i in range(w)]
self.pix[[i for i in range(h) if (i//sq)%2 == 1]] = row
它有效,但我希望更简单.