10. ImageChops invert

See: https://pillow.readthedocs.io/en/stable/reference/ImageChops.html#PIL.ImageChops.invert

10.1. Invert

Use the ImageChops.invert(image) method to invert an image.
out = MAX - image
ImageChops.invert(image)
returns an inverted image
image is the image to invert.
The code below inverts an image.
The original png is in RGBA mode so when inverted unexpected results are seen.
After converting to RGB mode, the colours are inverted as expected.
from PIL import Image, ImageChops

with Image.open("test_images/circles.png") as im:
    im_inv = ImageChops.invert(im)
    im_inv.save("chops/invert.png")
../_images/compare_invert.png