avatar = Image.open(avatarpath)
avatar = avatar.resize((150, 150), Image.ANTIALIAS)
bigsize = (avatar.size[0] * 3, avatar.size[1] * 3)
mask = Image.new('L', bigsize, 0)
draw = ImageDraw.Draw(mask)
draw.ellipse((0, 0) + bigsize, fill = 255)
mask = mask.resize(avatar.size, Image.ANTIALIAS)
avatar.putalpha(mask)
avatar = ImageOps.fit(avatar, mask.size, centering=(0.5, 0.5))
avatar.putalpha(mask)
avatar.save(avatarpathPng, format = 'png')