下面是一个如何将单选按钮转换为按钮框的示例

import tkinter as tk
root = tk.Tk()

rbvar = StringVar()
rbvar.set(" ")

rb1 = tk.Radiobutton(root, text="Option 1", variable=rbvar, value='a', indicatoron=0)
rb1.pack()

rb2 = tk.Radiobutton(root, text="Option 2", variable=rbvar, value='b', indicatoron=0)
rb2.pack()