Tkinter Destroying Label with Button doesn't work Python

Question

I have been trying to make a tk button which locates a file and prints the filename on the tk window as a Label. What I also want it to do is to update the Label with the new filename if the button would be pressed again . However, all it does now is print a new Label with the new filename under the previous Label, so I suppose that the only thing that isn't working in my code is .destroy() . Here is the function which is the command for the button as it is now:

from tkinter import *
from tkinter import filedialog
import os
import getpass

user = getpass.getuser()
cntr5 = 0

def open1():
    global cntr5
    global file1
    file1 = filedialog.askopenfilename(initialdir = "C:/Users/%s" % user, title = "Select a file", filetypes = ((".dbc files", "*.dbc"),))
    p1 = Label(screen, text = "File 1:")
    pa1 = Label(screen, text = os.path.split(str(file1)[2:])[1], fg = "dark green")
    if file1 != "" and cntr5 == 0:
        p1.pack()
        pa1.pack()
        cntr5 += 1
    elif file1 != "" and cntr5 != 0:
        pa1.destroy()
        pa1 = Label(screen, text = os.path.split(str(file1)[2:])[1], fg = "dark green")
        pa1.pack()
    else:
        pass

I've also tried to use pa1.configure() within elif: but that won't do the trick either. Please help with this.

Answer 1

I solved it! This is how:

from tkinter import filedialog
import os
import getpass

user = getpass.getuser()
cntr5 = 0

def open1():
    global cntr5
    global file1
    global p1
    global pa1
    file1 = filedialog.askopenfilename(initialdir = "C:/Users/%s" % user, title = "Select a file", filetypes = ((".dbc files", "*.dbc"),))
    if file1 != "" and cntr5 == 0:
        p1.pack()
        pa1.configure(text = os.path.split(str(file1)[2:])[1])
        pa1.pack()
        cntr5 += 1
    elif file1 != "" and cntr5 != 0:
        p1.destroy()
        pa1.destroy()
        p1 = Label(screen, text = "File 1:")
        pa1 = Label(screen, text = os.path.split(str(file1)[2:])[1], fg = "dark green")
        p1.pack()
        pa1.pack()
    else:
        pass

p1 = Label(screen, text = "File 1:")
pa1 = Label(screen, text = "hi", fg = "dark green")

Thank you to @acw1668