Python--批量修改指定文件夹下的文件后缀

import os

def batch_rename(work_dir, old_ext, new_ext):
    """
    This function batch renames a specific set of files within a directory
    """
    for filename in os.listdir(work_dir):
        # Get the file extension
        split_file = os.path.splitext(filename)
        file_ext = split_file[1]
        # Start of the logic to check the file extensions, if old_ext = file_ext
        if old_ext == file_ext:
            # Returns changed name of the file with new extension
            newfile = split_file[0] + new_ext

            # Write the files
            os.rename(
                os.path.join(work_dir, filename),
                os.path.join(work_dir, newfile)
            )

work_dir = r'C:\tmp'
old_ext = '.webp'
new_ext = '.png'
batch_rename(work_dir, old_ext, new_ext)

将work_dir替换为要修改的文件夹的路径，.webp替换为要更改的旧文件扩展名，.png替换为要更改的新文件扩展名。