这段Python脚本的目的是递归地重命名位于指定目录及其子目录下的文件

# -*- coding: utf-8 -*-
import os

def rename_files_in_dir(directory):
    for root, dirs, files in os.walk(directory):
        for file in files:
            old_file_path = os.path.join(root, file)
            
            # 获取最后一层目录名作为新文件的前缀
            new_prefix = os.path.basename(os.path.dirname(old_file_path)).strip()
            
            # 拼接新文件名
            base_name, ext = os.path.splitext(file)
            new_file_name = f"{new_prefix}_{base_name}{ext}"
            new_file_path = os.path.join(root, new_file_name)

            # 旧文件前缀
            old_prefix = base_name.split('_')[0] if '_' in base_name else ''

            # 跳过新旧文件前缀一致的数据
            if old_prefix == new_prefix:
                continue

            # 执行重命名操作
            os.rename(old_file_path, new_file_path)

# 使用函数
file_path = r'D:\20211215\little_fAile'
rename_files_in_dir(file_path)