Radiobutton Tkinter

Radiobutton in Tkinter module is used as an option button. Radiobutton allows the user to choose one in many options. Each group of Radiobutton has to be associated with the same variable and value of a variable can change after a mouse click on the Radio button. You need to set the value for every radio button with a different value. Below example shows you how to create a radio button in the Tkinter python application.

from tkinter import *
win=Tk()
win.title("CoderMantra Tutorial")
win.geometry('200x200')

var=IntVar()
l1=Label(win,text="How do you want to pay")
l1.grid(row=0,column=0)
r1=Radiobutton(win,text="Cash",value=1,variable=var)
r1.grid(row=1,column=0)
r2=Radiobutton(win,text="Card",value=2,variable=var)
r2.grid(row=2,column=0)

win.mainloop()

intvar() – It is known as control variable, it keep the value and updated when changes reflect during programming. The get() and set() method is used to retrieve and set the value.

Get Radio Button Value (get selected radio)

To get the value of the selected radio button, we will use the intvar() method to create a variable and get() method to access the value.

from tkinter import *
def func():
	if var.get()==1:
		lbl.configure(text="Pay By Cash")
	elif var.get()==2:
		lbl.configure(text="Pay By Card")
	else:
		lbl.configure(text="Select your Option")

win=Tk()
win.title("CoderMantra Tutorial")
win.geometry('200x200')

var=IntVar()
l1=Label(win,text="How do you want to pay")
l1.grid(row=0,column=0)
r1=Radiobutton(win,text="Cash",value=1,variable=var)
r1.grid(row=1,column=0)
r2=Radiobutton(win,text="Card",value=2,variable=var)
r2.grid(row=2,column=0)

b=Button(win,text="Click Here",command=func)
b.grid(row=3,column=0)
lbl=Label(win,text="")
lbl.grid(row=4,column=0)
win.mainloop() 

We can create different small App like quiz application, restaurant billing system and many more using radio button widget.

Mini Quiz

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Tkinter - Quiz 5

1 / 5

Q1. What is the primary purpose of the Radiobutton widget in Tkinter?

To enter text

To allow the user to select one option from multiple choices

To display images

To create a window

2 / 5

Q2. Which control variable is commonly used with Radiobutton in Tkinter?

StringVar()

BooleanVar()

IntVar()

DoubleVar()

3 / 5

Q3. Why do multiple Radiobutton widgets share the same variable?

To allow multiple selections

To group them so only one option can be selected at a time

To change their color

To increase their size

4 / 5

Q4. Which method is used to retrieve the selected value of a Radiobutton?

set()

read()

insert()

get()

5 / 5

Q5. Which property gives each Radiobutton a unique selection value?

value

text

command

state

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Written by Shubhranshu Shekhar, who has trained 20000+ students in coding.

Shubhranshu Shekhar

Shubhranshu Shekhar is a coding instructor, mentor, and founder of VSIT Delhi with 20+ years of teaching experience (since 2004). He has guided many students who are now working in multinational companies and specializes in Full Stack Development, Python, Digital Marketing, and Data Analytics.