PIL将像素设置为透明/空白

Question

我有一个规则集，如果此单元格的列表中有颜色，则删除单元格

image = PILImage.open('revamp'+img_url)
img = image
random_name = random_filename(path="revamp/media/colorfest/")
img.save(random_name, "PNG")

pixels = image.load()   
for pos in area_id:
    pixel = pixels[pos[0], pos[1]]
    pixel = [pixel[0], pixel[1], pixel[2]]

    if pixel in colors:
        img.putpixel([pos[0], pos[1]], (0, 0, 0, 0))

img.save(random_name, "PNG")
response['status'] = 'ok'

这是我得到的，黑掉了细胞

原始图片