2. Image getbands

See: https://pillow.readthedocs.io/en/stable/reference/Image.html#PIL.Image.Image.getbands

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2.1. Getbands

Use the Image.getbands() method to return a tuple containing the name of each band in the image. For example, getbands on an RGB image returns (‘R’, ‘G’, ‘B’).

from PIL import Image

with Image.open("shapes/box.png") as im:
    print(im.getbands())
    # ('R', 'G', 'B', 'A')