使用tkinter更改文件夹中所有图像的扩展名

import os
from tkinter import Tk, filedialog

def select_folder():
    root = Tk()
    root.withdraw()
    folder_path = filedialog.askdirectory()
    return folder_path

def change_extension(folder_path, old_extension, new_extension):
    for filename in os.listdir(folder_path):
        if filename.endswith(old_extension):
            new_filename = os.path.splitext(filename)[0] + new_extension
            old_file_path = os.path.join(folder_path, filename)
            new_file_path = os.path.join(folder_path, new_filename)
            os.rename(old_file_path, new_file_path)

folder_path = select_folder()
old_extension = ".jpg"
new_extension = ".png"
change_extension(folder_path, old_extension, new_extension)