[Tkinter] Radiobutton in Tkinter not Updating Variable from Value

[Aidan54321]

Hello. So I am trying to create a radiobutton that changes the value of another variable when clicked on. Obviously I'm missing something, because no values are changing. Here's the code:

from tkinter import *

root = Tk()

iv1 = IntVar()
iv1.set(1)
var = IntVar()
var.set(0)
rb1 = Radiobutton(master=root, value=iv1, variable=var)
rb1.pack()

num = var.get()

print(var.get())

root.mainloop()

print(num)

In my project, I will want to have four radiobuttons instead of one, but this is just a simple code that shows you the error I'm having. At the end, print(num) should give 1, but instead it equals 0. Any idea why? Thanks in advance.

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EDIT:

Here is my output:

0
0

[Larz60+]

use textvariable, not variable