如何让tkinter frame填充整个画布并与之一起扩展？

import tkinter as tk

root = tk.Tk()

# 创建画布
canvas = tk.Canvas(root)
canvas.pack(fill=tk.BOTH, expand=True)

# 创建Frame并设置背景色
frame = tk.Frame(canvas, bg='red')
frame.pack(fill=tk.BOTH, expand=True)

# 使用Grid布局管理器将Frame放置在画布上
frame.grid(row=0, column=0, sticky='nsew')

# 设置画布的行和列的权重，使Frame可以随着画布的扩展而扩展
canvas.grid_rowconfigure(0, weight=1)
canvas.grid_columnconfigure(0, weight=1)

root.mainloop()