python ttk选中的checkbutton

Question

i'm trying to start a program with the checkbutton selected but I don't know how to do it.

import tkinter as tk
from tkinter import ttk
root = tk.Tk()
v = tk.IntVar()
cb = ttk.Checkbutton(root,text='Remember user',onvalue=1,offvalue=0, variable = v);cb.pack()

Answer 1

Use the select() method:

from tkinter import *

root = Tk()
cb = Checkbutton(root,text='Remember user',onvalue=1,offvalue=0)
cb.pack()
cb.select()

Answer 2

One can simply instantiate the variable with a desired value, such as 1 :

v = tk.IntVar(value=1)

which is the same onvalue represented by cb . Since its value and v is the very same, and since v is the attached variable , it will be selected from the very beginning.