Tkinter Tutorial- Listbox

main.py

from tkinter import *
from tkinter.ttk import Button
from tkinter.messagebox import showinfo
root = Tk()
root.title("Window")
def sub_value():
    value = str(inp.get())
    li.insert(END,value)
def get_value():
    showinfo(title="Information",message=f"You Click The: {li.get(li.curselection())}")
def clear_list():
    li.delete(0,END)
l = Label(root,text="Enter Value: ").pack()
inp = Entry(root)
inp.pack(padx=5,pady=5)
li = Listbox(root)
li.pack(side='right',expand=True)

sub_btn = Button(root,text="Submit Value",command=sub_value).pack()
btn = Button(root,text="Get Value",command=get_value).pack()
clear_btn = Button(root,text="Clear List",command=clear_list).pack()
exit_btn = Button(root,text="Exit",command=root.quit).pack()

root.geometry("500x400+500+80")
root.resizable(0,0)
root.mainloop()