重命名多个子文件夹中的txt文件

import os

def rename_txt_files(folder_path, new_name):
    for root, dirs, files in os.walk(folder_path):
        for file in files:
            if file.endswith(".txt"):
                old_file_path = os.path.join(root, file)
                new_file_path = os.path.join(root, new_name + ".txt")
                os.rename(old_file_path, new_file_path)

# 使用示例
folder_path = "/path/to/main/folder"
new_name = "new_file_name"
rename_txt_files(folder_path, new_name)