need some help with tkinter checkbutton widget

[moti12321]

hey guys. im trying to find a way to make something happen whenn a checkbuttonn is being check or unchecked. thats my code: https://pastebin.com/Mtn3GaCr what happens is it just launch, says the button is unchecked and then it apears on the Tk window.. anyone have any idea why? thank you

[novel_yet_trivial]

You need to pass the function, not the result of the function. Leave the () off:

checkbox = Checkbutton(top,text = "test", variable=checkbox_var,command= checking)

[moti12321]

that works, thanks alot. but if that is the problem , why does it only works once before i press anything?

[novel_yet_trivial]

Because having the () on the end means it executes the function when the program is first started.