To generate random pixel avatars with Pillow
1 Initialization
a = Avatar()
2 Generate a avatar with 256(default) px width and height
avatar = a.generate_avatar(fp=r'D:\test', fn='avatar.jpg')
3 Generate two thumbnails from the generated avatar, 40x40 and 100x100 respectively
a.generate_thumb(avatar, size=100, fn='avatar_thumb_100x100.jpg')
a.generate_thumb(avatar, size=40, fn='avatar_thumb_40x40.jpg')