Why Does My Tkinter Window Background Not Change?

I've a small program with a feature to change the background color of a different window than the frame I use to ask for the background color. (I hope you understand this.) The pro

Solution 1:

The problem is this code:

c = wert.get()

if c == 1:
        fenster.config(background="red")
elif c == 2:
        fenster.config(background="blue")
else:
        fenster.config(background="yellow")

The .get() method is returning a str, because you declared wert to be a StringVar() but you're comparing to an int. Either convert via int(c) or compare strings:

ifc== '1':

or perhaps declare wert to be an IntVar(). Also, reread how the Python global statement works -- use it where you want to modify a global within a function, not where the global is defined.

Solution 2:

Instead of declaring wert as a StringVar, you should declare it as IntVar because in your function OptionButton you're making the comparaison between a string and an int so it always entering in the else part so your background is always yellow.