如何在tkinter中居中我的滚动条内容？

import tkinter as tk
from tkinter import ttk

def center_content(event):
    canvas.update_idletasks()
    width = canvas.winfo_width()
    height = canvas.winfo_height()
    x = (canvas.winfo_width() - width) / 2
    y = (canvas.winfo_height() - height) / 2
    canvas.coords(content_frame, x, y)

root = tk.Tk()
root.title("Centered Scrollable Content")

# 创建一个Canvas和一个Scrollbar
canvas = tk.Canvas(root)
scrollbar = ttk.Scrollbar(root, orient="vertical", command=canvas.yview)
canvas.configure(yscrollcommand=scrollbar.set)

# 将Canvas和Scrollbar放置在Frame中
frame = ttk.Frame(root)
frame.pack(fill="both", expand=True, padx=10, pady=10)
canvas.pack(side="left", fill="both", expand=True)
scrollbar.pack(side="right", fill="y")

# 创建一个Frame用于放置内容，并将其放置在Canvas上
content_frame = ttk.Frame(canvas)
canvas.create_window((0, 0), window=content_frame, anchor="nw")

# 添加一些示例内容
for i in range(50):
    ttk.Label(content_frame, text=f"Label {i}").pack()

# 绑定窗口大小改变事件以重新居中内容
root.bind("<Configure>", center_content)

root.mainloop()