The radiobutton lets you select from a variety of items. They are part of the default tk module. Unlike a checkbox, a tkinter lets you select only one option.

You can achive that by adding the same variable as parameter for the radiobuttons. If a radiobutton is clicked you can call a callback function.

Related course:
Python Desktop Apps with Tkinter
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radiobutton

tkinter radiobutton

The program below creates 3 radiobuttons with the method Radiobutton. It adds a window as parameter, the text, the variable to connect it with and a callback function.

For it to work, all radiobuttons need to be linked to the same variable, in this example var.

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#!/usr/bin/env python
# -*- coding: utf-8 -*-

import tkinter as tk

window = tk.Tk()
window.title('My Window')
window.geometry('500x300')

var = tk.StringVar()
l = tk.Label(window, bg='white', width=20, text='empty')
l.pack()

def print_selection():
l.config(text='you have selected ' + var.get())

r1 = tk.Radiobutton(window, text='Option A', variable=var, value='A', command=print_selection)
r1.pack()
r2 = tk.Radiobutton(window, text='Option B', variable=var, value='B', command=print_selection)
r2.pack()
r3 = tk.Radiobutton(window, text='Option C', variable=var, value='C', command=print_selection)
r3.pack()

window.mainloop()

tkinter radiobutton