在 Python Tkinter 中将项目添加到列表框

Question

I would like my Listbox widget to be updated upon clicking of a button. However I encountered a logic error. When I click on the button, nothing happens. No errors at all.

listOfCompanies: [[1, ''], [2, '-'], [3, '@ASK TRAINING PTE. LTD.'], [4, 'AAIS'], [5, 'Ademco'], [6, 'Anacle']

def populatebox():
            listBox.insert("end", listOfCompanies)

btn = Button(self, text="Update list", command = lambda: populatebox())
btn.pack()

Answer 1

If you're looking to just insert every tuple into the Listbox from the list as they are without separating out the tuple then there are two major changes.

First you cannot declare a list as list: [1, 2, 3, ...] , it must be list = [1, 2, 3, ...] .

Secondly, you are currently attempting to insert the entire list onto one entry in the Listbox . You should instead iterate over them, see below for an example:

from tkinter import *

root = Tk()

listBox = Listbox(root)
listBox.pack()

listOfCompanies = [[1, ''], [2, '-'], [3, '@ASK TRAINING PTE. LTD.'], [4, 'AAIS'], [5, 'Ademco'], [6, 'Anacle']]

def populatebox():
    for i in listOfCompanies:
        listBox.insert("end", i)

btn = Button(root, text="Update list", command = lambda: populatebox())
btn.pack()