Tkinter lesson 12 – listbox part. 2: how to delete selected item

Insert items in the code

import tkinter as tk

win = tk.Tk()

lb = tk.Listbox(win)
lb.pack()

lb.insert(0, "First item")
lb.insert(0, "Second item")

win.mainloop()

Delete Items

import tkinter as tk

win = tk.Tk()

lb = tk.Listbox(win)
lb.pack()

lb.insert(0, "First item")
lb.insert(0, "Second item")

lb.delete(tk.ACTIVE)  # delete the on on top
lb.delete(0)  # delete the one on top

win.mainloop()

Select more items at once

You may be wanting to select more items at once. You must add the selectmode argument to do that, like in the code below.

import tkinter as tk

win = tk.Tk()

lb = tk.Listbox(win, selectmode=tk.EXTENDED)
lb.pack()

lb.insert(0, "First item")
lb.insert(0, "Second item")


win.mainloop()

 

Listbox: insert an item with a widget

listbox.insert(tk.END, content.get())

To insert the value in a listbox the first argument is where to start (from the last character in the listbox) and the second is the string with the item. In this case the string was taken from the content of the entry widget.

Tkinter 11 – Listbox

Delete all the items

listbox.delete(0, tk.END)

Delete selected item

listbox.delete(tk.ANCHOR)

Whole code

import tkinter as tk

win = tk.Tk()


def additem():
    listbox.insert(tk.END, content.get())


def deleteAll():
    listbox.delete(0, tk.END)


def deleteselected():
    listbox.delete(tk.ANCHOR)


content = tk.StringVar()
entry = tk.Entry(win, textvariable=content)
entry.pack()

button = tk.Button(win, text="Add Item", command=additem)
button.pack()

button2 = tk.Button(win, text="Delete list", command=deleteAll)
button2.pack()

button3 = tk.Button(win, text="Delete selected", command=deleteselected)
button3.pack()

listbox = tk.Listbox(win)
listbox.pack()

win.mainloop()

Get the selected item

import tkinter as tk

# WINDOW CREATION
win = tk.Tk()
geo = win.geometry
geo("400x400+400+400")

# ACTION TO PERFORM WHEN SELECTED
def go():
    cs = lb.curselection()[0]
    label['text'] = lb.get(cs)


# THE LISTBOX AND THE BINDING
lb = tk.Listbox(win)
lb.bind("<<ListboxSelect>>", lambda x: go())
lb.pack()

# THE ITEMS INSERTED WITH A LOOP
items = ["first", "second", "third"]
for item in items:
    lb.insert(tk.END, item)

# THE LABEL WHERE APPEARS THE SELECTED ITEM NAME
label = tk.Label(win)
label.pack()

win.mainloop()

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