Python Tkinter multiple selection Listbox

Question

I tried a search on here but not come across the correct answer.
I have a listbox which is setup with selection=\'multiple\'. I then try to obtain a list

Answer 1

It seems the correct way to get a list of selected items in a Tkinter listbox is to use self.rightBT3.curselection(), which returns a tuple containing the zero-based index of the selected lines. You can then get() each line using those indices.

(I haven't actually tested this though)

Answer 2

I find the above solution a little bit "obscure". Specially when we are dealing here with programers that are learning the craft or learning python/tkinter.

I came out with, what I think, a more explanatory solution, which is the following. I hope that this works out better for you.

#-*- coding: utf-8 -*-
# Python version 3.4
# The use of the ttk module is optional, you can use regular tkinter widgets

from tkinter import *
from tkinter import ttk

main = Tk()
main.title("Multiple Choice Listbox")
main.geometry("+50+150")
frame = ttk.Frame(main, padding=(3, 3, 12, 12))
frame.grid(column=0, row=0, sticky=(N, S, E, W))

valores = StringVar()
valores.set("Carro Coche Moto Bici Triciclo Patineta Patin Patines Lancha Patrullas")

lstbox = Listbox(frame, listvariable=valores, selectmode=MULTIPLE, width=20, height=10)
lstbox.grid(column=0, row=0, columnspan=2)

def select():
    reslist = list()
    seleccion = lstbox.curselection()
    for i in seleccion:
        entrada = lstbox.get(i)
        reslist.append(entrada)
    for val in reslist:
        print(val)

btn = ttk.Button(frame, text="Choices", command=select)
btn.grid(column=1, row=1)

main.mainloop()

Please note that the use ot the ttk themed widgets is completely optional. You can use normal tkinter's widgets.

Answer 3

To get a list of text items selected in a listbox, I find the below solution to be the most elegant:

selected_text_list = [listbox.get(i) for i in listbox.curselection()]