对博客中所有图片进行统一缩放

import os
import re

file = r'1.md'            # 将博客内容保存至文件
new_file = 'new_'+file    
pattern = re.compile(r"(\s*)!\[\]\((https://.*png)\)")

with open(file, 'r', encoding='utf-8') as f, open(new_file, 'w+', encoding='utf-8') as w:
    for line in f.readlines():
        res = pattern.search(line)
        if res:
            print(line)
            # print(res.group(2))
            line = res.group(1) + r'<img src="'+res.group(2)+r'" width="50%" height="50%" />' + '\n'  #设置缩放比例
            print(line)
        w.write(line)

print('完成')

缩放前：

缩放后：