How old am I? (first gui script)

[Nwb]

Normally you would display the result in a widget, e.g. label, not messagebox. Also, get rid of using global variables

I want a secondary window to display errors (the result is just temporarily using the msgbox in the future it will pop a window with a picture in it), so messagebox from tkinter seemed very convenient. But this malfunction seems to occur to me with both my GUI scripts so I have to use another function instead of messagebox.