How to Batch Rename Files in Python Using Regex – A Step-by-Step Guide

1. Introduction

Hello, I am a Python enthusiast. Recently a member asked how to batch rename files in a directory using Python.

Below is the original problem screenshot:

The following script implements the required functionality:

import os
import re
import time

"""对指定目录下的所有文件进行有选择的修改名称"""
def ReFileName(dirPath, pattern):
    """ 
    :param dirPath: 文件夹路径
    :param pattern: 正则匹配模式
    :return:
    """
    # 对目录下的文件进行遍历
    for file in os.listdir(dirPath):
        # 判断是否是文件
        if os.path.isfile(os.path.join(dirPath, file)):
            # 用正则匹配，去掉不需要的词
            newName = re.sub(pattern, "", file)
            # 设置新文件名
            newFilename = file.replace(file, newName)
            # 重命名
            os.rename(os.path.join(dirPath, file), os.path.join(dirPath, newFilename))
    print("文件名已统一修改成功")

if __name__ == '__main__':
    timeStart = time.time()
    dirPath = r"X:\\文件"
    pattern = re.compile(r'\0：-(.+)3')
    ReFileName(dirPath, pattern)
    timeEnd = time.time()
    print("程序运行了%d秒" % (timeEnd - timeStart))

2. Solution Process

A community member later suggested an alternative approach, illustrated in the following image:

The provided code successfully resolved the file‑renaming issue.

3. Summary

This article presented a Python file‑processing problem, explained the required logic, and supplied a complete script that batch‑renames files according to a regular‑expression pattern.