如何在tkinter中循环浏览文件夹中的图像？

from tkinter import *
from PIL import ImageTk, Image

root = Tk()

canvas = Canvas(root, width=500, height=500)
canvas.pack()

def browse_images(folder_path):
    images = []  # 存储图像对象的列表
    image_paths = []  # 存储图像路径的列表

    # 遍历文件夹中的图像文件
    for filename in os.listdir(folder_path):
        if filename.endswith(".jpg") or filename.endswith(".png"):
            image_path = os.path.join(folder_path, filename)
            image_paths.append(image_path)
            image = Image.open(image_path)
            images.append(image)

    # 显示第一张图像
    canvas.image = ImageTk.PhotoImage(images[0])
    canvas.create_image(0, 0, anchor=NW, image=canvas.image)

    # 定义一个变量用于记录当前显示的图像索引
    current_image_index = 0

    # 定义一个函数用于切换到下一张图像
    def next_image():
        nonlocal current_image_index
        current_image_index = (current_image_index + 1) % len(images)
        canvas.image = ImageTk.PhotoImage(images[current_image_index])
        canvas.create_image(0, 0, anchor=NW, image=canvas.image)

    # 创建一个按钮用于切换到下一张图像
    next_button = Button(root, text="Next", command=next_image)
    next_button.pack()

    root.mainloop()

folder_path = "路径/到/文件夹"
browse_images(folder_path)