Tkinter Checkbutton – Set value

To programmatically set the value of a Tkinter Checkbutton widget, you can use the set() method of the associated IntVar variable.

For example, consider that we have a Checkbutton checkbutton_1 created with the variable option set to the IntVar checkbutton_1_var.

checkbutton_1 = tk.Checkbutton(window, text="Option 1", variable=checkbutton_1_var)

To set the value of this Checkbutton to 1 (selected), use the set() method as shown below.

checkbutton_1_var.set(1)

Or you can set the value of the Checkbutton to 0 (deselected) as shown below.

checkbutton_1_var.set(0)

In this tutorial, you shall learn how to set the value of a Checkbutton in Tkinter, with examples.

Example

In this example, we shall create three Checkbutton, and a button Set values. When user clicks on the Set values button, we set the first Checkbutton to deselected by setting its value to 0, and set the second and third Checkbuttons to selected by setting their values to 1.

Python Program

import tkinter as tk

def set_values():
    checkbutton_1_var.set(0)
    checkbutton_2_var.set(1)
    checkbutton_3_var.set(1)

# Create the main window
window = tk.Tk()
window.geometry("300x200")
window.title("PythonExamples.org")

# Variables for Checkbuttons
checkbutton_1_var = tk.IntVar()
checkbutton_2_var = tk.IntVar()
checkbutton_3_var = tk.IntVar()

# Create Checkbuttons in a loop
checkbutton_1 = tk.Checkbutton(window, text="Option 1", variable=checkbutton_1_var)
checkbutton_2 = tk.Checkbutton(window, text="Option 2", variable=checkbutton_2_var)
checkbutton_3 = tk.Checkbutton(window, text="Option 3", variable=checkbutton_3_var)

checkbutton_1.pack()
checkbutton_2.pack()
checkbutton_3.pack()

button = tk.Button(window, text="Set values", command=set_values)
button.pack()

# Start the Tkinter event loop
window.mainloop()

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