如何使用Python在tkinter画布上绘制两个标签之间的直线？

from tkinter import Tk, Canvas, Label

root = Tk()

canvas = Canvas(root, width=400, height=300)

label1 = Label(root, text="标签1")
label2 = Label(root, text="标签2")
label1.place(x=50, y=100)
label2.place(x=250, y=100)

x1 = label1.winfo_rootx() + label1.winfo_width() / 2
y1 = label1.winfo_rooty() + label1.winfo_height() / 2
x2 = label2.winfo_rootx() + label2.winfo_width() / 2
y2 = label2.winfo_rooty() + label2.winfo_height() / 2

canvas.create_line(x1, y1, x2, y2)

canvas.pack()
root.mainloop()