Python PIL bitmap/png from array with mode=1

Question

Playing with PIL (and numpy) for the first time ever. I was trying to generate a black and white checkerboard image through mode=\'1\', but it doesn\'t work.

Answer 1

Just use PyPNG:

import numpy as np

if __name__ == '__main__':
    g = np.asarray(dtype=np.dtype('uint8'), a=[
        [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, ],
    ])
    print(g)

    import png
    i = png.from_array(g, mode='L;1')
    i.save('checker.png')