Tkinter, Python, CheckBox, help solve how to check true or false?

[Kadir]

I can't figure out how to check, that's the code:

def show():
    print('флажок 18', setonstart_value.get())
    if (setonstart_value.get()):
        print('No')
window = tk.Tk()

setonstart_value = tk.StringVar()

setonstart = tk.Checkbutton(window, text='SetOnStart',

variable=setonstart_value,

offvalue='No',

onvalue='yes'

)

setonstart.pack()

tk.Button(window, text='show', command=show).pack()

window.mainloop()

[derk]

You have a flank value - a line.'yes' or 'No') The empty line is considered to be the truth, so the condition is if (setonstart_value.get()): Always done.

Make the variable. setonstart_value logical variableBooleanVar()) instead of string (StringVar()and clean up. onvalue and offvalue, then there'll be a black box. Falseon . True:

import tkinter as tk
def show():

print('флажок 18', setonstart_value.get())

if (setonstart_value.get()):

print('Yes')

else:

print('No')
window = tk.Tk()

setonstart_value = tk.BooleanVar()

setonstart = tk.Checkbutton(window, text='SetOnStart', variable=setonstart_value)

setonstart.pack()

tk.Button(window, text='show', command=show).pack()

window.mainloop()

Or leave. StringVarbut then you have to compare the specific value of the line, for example:

if (setonstart_value.get() == 'yes'):

print('Yes')

else:

print('No')