Let us consider a situation for a particular system to keep selecting multiple files from a directory and, once copied in the clipboard, paste them into another directory. The idea of making multiple selections in ListBoxes can be implemented by using the exportselection property. The property prevents the selected options from losing while choosing an item from another ListBox. Thus, we can select multiple options from the ListBoxes. To configure a Listbox to behave like keep selection steady, we can make exportselection = False.
Example
#Import Tkinter library
from tkinter import *
#Create an instance of Tkinter frame or window
win= Tk()
#Set the geometry of tkinter frame
win.geometry("750x350")
#Create ListBoxes
listboxA=Listbox(win, exportselection=False) #Create listboxA
listboxA.pack(padx=10,pady=10,fill=BOTH,expand=True)
listboxB=Listbox(win,exportselection=False) #Create ListboxB
listboxB.pack(padx=10,pady=10,fill=BOTH,expand=True)
listboxA.insert(1, "1.Python")
listboxA.insert(2, "2.Java")
listboxA.insert(3, "3.C++")
listboxA.insert(4, "4.Rust")
listboxA.insert(5, "5.GoLang")
listboxB.insert(1, "a.C#")
listboxB.insert(2, "b.JavaScript")
listboxB.insert(3, "c.R")
listboxB.insert(4, "d.Php")
listboxB.insert(5, "e.CoffeeScript")
listboxB.insert(6, "f.Curl")
win.mainloop()Output
Running the above code will display a window that contains two listboxes. While making a selection, we can select multiple items from both listboxes.
