Resize Error #8220

from io import BytesIO
from PIL import Image
import matplotlib.pyplot as plt
import numpy as np
from PIL.Image import Resampling


def create_test_image():
    file = BytesIO()
    image = Image.new('RGBA', size=(50, 50), color=(155, 0, 0))
    image.save(file, 'png')
    file.name = 'test.png'
    file.seek(0)
    return file


source_file = create_test_image()

fig, ax = plt.subplots()
wm = Image.open(source_file)
wm_size = np.array(wm.size)
max_size = fig.get_size_inches() * fig.dpi * 0.6  # NOQA
scaling_factor = min(max_size / wm_size)

img_size = (wm_size * scaling_factor).astype(int)
wmr = wm.resize(img_size, Resampling.LANCZOS)