from PIL import Image, ImageDraw, ImageOps
def convert_image_to_circle(image_path):
my_image = Image.open(image_path)
# create mask
mask = Image.new('L', my_image.size)
draw = ImageDraw.Draw(mask)
# draw white circle
draw.ellipse((0, 0) + mask.size, fill = 255)
# create output image
output = ImageOps.fit(my_image, mask.size, centering=(0.5, 0.5))
output.putalpha(mask)
output.save('out.png')
convert_image_to_circle('test.png')