[Tkinter] Trying to display a changing variable

[AnonymousNobody]

I have been trying to create a tkinter display of a variable that changes semi-regularly, but I cannot seem to get it to update regardless of what I try.
I have tried config(), StringVar(), and global.

#removed code and comments

from tkinter import ttk
root = Tk()
L = Label(root, justify = LEFT)
L.pack()
V = StringVar()
L['textvariable'] = V
V.set('Test')

#more removed code used for defining Lvar

def function():
    if condition True:

        #code for defining Lvar and X (wait time) removed to not have over 200 lines listed

        V.set(Lvar)
        #L.config(text = '{}'.format(Vortoj))
        root.after(X, function)

function()
root.mainloop()