The Tkinter Radiobutton widget

Syntax#

radiobutton = tk.Radiobutton(parent, **kwargs)

Parameters#

Parameter	Description
parent	tkinter widgets exist in a hierarchy. Except for the root window, all widgets have a parent. Some online tutorials call this “master”. When the widget is added to the screen with pack, place or grid, it will appear inside this parent widget.

command	function called each time the user changes the state of the radiobutton

indicatoron	1 or True for radio buttons, 0 or False for button boxes

text	Text to display next to the radiobutton.

value	When the radiobutton is selected, the associated control variable is set to value.

variable	Control variable the radiobutton shares with the other radiobutton of the group.
## Remarks#
These examples assume that tkinter has been imported with either `import tkinter as tk` (python 3) or `import Tkinter as tk` (python 2).

Reference:

To turn the above example into a “button box” rather than a set of radio buttons, set the indicatoron option to 0. In this case, there’s no separate radio button indicator, and the selected button is drawn as SUNKEN instead of RAISED:

-effbot

Here’s an example of how to turn radio buttons to button boxes:

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()

Create a group of radiobuttons

Such a group is made of radiobuttons that share a control variable so that no more than one can be selected.

# control variable
var = tk.IntVar(parent, 0)

# group of radiobuttons
for i in range(1,4):
    tk.Radiobutton(parent, text='Choice %i' % i, value=i, variable=var).pack()

tk.Button(parent, text='Print choice', command=lambda: print(var.get())).pack()