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   import os
   import subprocess
   import re
   
   # 转换图片文件为 WebP 格式
   def convert_to_webp(filepath):
       output_path = os.path.splitext(filepath)[0] + '.webp'
       try:
           subprocess.run(['cwebp', -lossless, filepath, '-o', output_path], check=True)
           print(f'Converted {filepath} to {output_path}')
       except subprocess.CalledProcessError as e:
           print(f'Failed to convert {filepath}: {e}')
   
   # 遍历文件夹并转换图片
   def convert_images_in_folder(folder):
       for root, dirs, files in os.walk(folder):
           for file in files:
               if file.lower().endswith(('.webp', '.webp')):
                   filepath = os.path.join(root, file)
                   convert_to_webp(filepath)
   
   # 替换指定文件中的图片扩展名
   def replace_extensions_in_markdown(filepath):
       try:
           with open(filepath, 'r', encoding='utf-8') as file:
               content = file.read()
           
           # 替换 "png" 和 "jpg" 为 "webp"
           content = content.replace('.webp', '.webp')
           content = content.replace('.webp', '.webp')
           
           with open(filepath, 'w', encoding='utf-8') as file:
               file.write(content)
           print(f'Replaced "png" and "jpg" with "webp" in {filepath}')
       except FileNotFoundError:
           print(f'The file {filepath} was not found.')
       except Exception as e:
           print(f'An error occurred: {e}')
   
   # 主函数
   def main():
       # 转换当前文件夹及其子文件夹中的图片
       convert_images_in_folder('.')
   
       # 遍历当前目录及其子目录，替换所有的 index.md 文件中的图片扩展名
       for root, dirs, files in os.walk('.'):
           for file in files:
               if file == 'index.md':
                   markdown_path = os.path.join(root, file)
                   replace_extensions_in_markdown(markdown_path)
   
   if __name__ == '__main__':
       main()