Python Tkinter Radiobutton Widget

In this tutorial, we will cover the Tkinter Radiobutton widget in Python, which is used when we want to add a radio button to the GUI of our application.

Tkinter radiobutton widget is used to implement multiple-choice options that are mainly created in user input forms.

• This widget offers multiple selections to the user and allows the user to select only one option from the given ones. Thus it is also known as implementing one-of-many selection in a Python Application.

• Also, different methods can also be associated with radiobutton.

• You can also display multiple line text and images on the radiobutton.

• Each radiobutton displays a single value for a particular variable.

• You can also keep a track of the user's selection of the radiobutton because it is associated with a single variable

Tkinter Radiobutton Widget

The syntax of the Radiobutton widget is given below:

W = Radiobutton(master, options)   

In the above syntax, the master parameter denotes the parent window. You can use many options to change the look of the radiobutton and these options are written as comma-separated key-value pairs.

Tkinter Radiobutton Widget Options:

Following are the options used with Tkinter Radiobutton widgets:

Tkinter Radiobutton Widget Methods:

Following are the various methods used with the Tkinter Radiobutton widgets:

Tkinter Radiobutton Widget Example

Below we have a basic example for the radio button widget. let us see the code snippet for the Radiobutton widget:

#firstly ImportTkinter module 
from tkinter import * 
from tkinter.ttk import *

# Creating parent Tkinter window 
win = Tk() 
win.geometry("200x200") 

# let us create a Tkinter string variable 
# that is able to store any string value 
v = StringVar(win, "1") 

# here is a Dictionary to create multiple buttons 
options = {" Option A" : "1", 
		"Option B" : "2", 
		"Option C" : "3", 
		"Option D" : "4" 
		} 

# We will use a Loop just to create multiple 
# Radiobuttons instaed of creating each button separately
for (txt, val) in options.items(): 
	Radiobutton(win, text=txt, variable=v, value=val).pack(side = TOP, ipady = 4) 

mainloop() 

The above code will give the following output:

Note: If you will try above code snippet by yourself then you will see that in the output you can select only one button at a time.

Tkinter Radiobutton Widget Another Example

Below we have another example of this widget where we will add styling to radiobutton using style class:

from tkinter import * 
from tkinter.ttk import *

win= Tk() 
win.geometry('200x200') 
v = StringVar(win, "1") 

# we will add Style class to add style to Radiobutton  
style = Style(win) 
style.configure("TRadiobutton", background = "light blue", 
				foreground = "orange", font = ("arial", 14, "bold")) 

# Dictionary to create multiple buttons 
values = {"RadioButton 1" : "1", 
		"RadioButton 2" : "2", 
		"RadioButton 3" : "3" 
		} 

for (text, value) in values.items(): 
	Radiobutton(win, text = text, variable = v, 
				value = value).pack(side = TOP, ipady = 3) 
mainloop() 

The above code will change the font style as well as background and foreground colors. In the above TRadiobutton is used in style class, which automatically applies styling to all the available Radiobuttons.

Summary:

In this tutorial, we learned about the Radiobutton widget which is used to create multiple options out of which a single can be selected. This is mainly used when we create a user form, like registration form.