憋再 @官方了，头像加国旗，10 行代码给你安排！

# -*- coding:utf-8 -*-
from PIL import Image
# 依次打开头像文件和国旗文件
flag_img = Image.open('flag.png')
selfie_img = Image.open('original_selfie.png')
# 根据头像大小调整国旗大小和位置
ratio = 5
flag_scaling = flag_img.size[1] / (selfie_img.size[1] / ratio)
flag_new_size = int(flag_img.size[0] / flag_scaling), int(flag_img.size[1] / flag_scaling)
flag_location = selfie_img.size[0] - flag_new_size[0], selfie_img.size[1] - flag_new_size[1]
# 构造新图像文件 
selfie_with_flag = Image.new(selfie_img.mode, selfie_img.size)
selfie_with_flag.paste(selfie_img)
selfie_with_flag.paste(flag_img.resize(flag_new_size), box=flag_location)
# 保存添加了国旗的图像文件
selfie_with_flag.save('new_selfie.png')