[Tkinter] LANCZOS

[Gribouillis]

why refer to a release that is a year away?

Really I don't know why. You could define

def resize(img, *args, **kwargs):
    with warnings.catch_warnings():
        img.resize(*args, **kwargs)
...
resized_img = resize(img, Image.LANCZOS)

Aso perhaps a better solution in Warnings Control