如何使用Python或c#替换文件夹中所有文件中的camelCasing？

import os
import re

def replace_camelcase(folder_path):
    for root, dirs, files in os.walk(folder_path):
        for file in files:
            file_path = os.path.join(root, file)
            file_name, file_ext = os.path.splitext(file)
            new_file_name = re.sub(r'([a-z])([A-Z])', r'\1_\2', file_name).lower()
            new_file_path = os.path.join(root, new_file_name + file_ext)
            os.rename(file_path, new_file_path)

# 调用示例
replace_camelcase('/path/to/folder')

using System;
using System.IO;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
        string folderPath = "/path/to/folder";
        ReplaceCamelCase(folderPath);
    }
    
    public static void ReplaceCamelCase(string folderPath)
    {
        string[] files = Directory.GetFiles(folderPath, "*", SearchOption.AllDirectories);
        
        foreach (string file in files)
        {
            string fileName = Path.GetFileNameWithoutExtension(file);
            string fileExt = Path.GetExtension(file);
            string newFileName = Regex.Replace(fileName, @"([a-z])([A-Z])", "$1_$2").ToLower();
            string newFilePath = Path.Combine(Path.GetDirectoryName(file), newFileName + fileExt);
            File.Move(file, newFilePath);
        }
    }
}