如何使用PIL将透明图像的背景设置为白色？

from PIL import Image

image = Image.open("image.png")

if image.mode in ("RGBA", "LA") or (image.mode == "P" and "transparency" in image.info):
    transparent = True
else:
    transparent = False

background = Image.new("RGB", image.size, (255, 255, 255))

if transparent:
    background.paste(image, mask=image.split()[3])
else:
    background.paste(image)

background.save("new_image.png")