# Tk_toggle_selection.py

# Tk_toggle_selection.py

from Tkinter import *

root = Tk()
lb = Label(text="Tk Select Toggle Demo")
lb.pack()

mylist='abc def ghi jkl mno pqr stu vwx 123 456 789'.split()

def select_chk():
    vsel=lb.curselection()
    if len(vsel) == 0:
        lb.select_set(0, END)
    elif len(vsel) == 1:
        print "You can select more than one in this demo"
        print lb.get(int(vsel[0]))
        print
    else:
        lb.select_clear(0, END)
def pr_chk():
    vsel=lb.curselection()
    for z in vsel:
        z=int(z)
        print lb.get(z)
    print
#
lsb_f = Frame(root)
lsb_f.pack(side="top", padx=10)
lb = Listbox(lsb_f, width=20, height=7, selectmode=MULTIPLE)
scr = Scrollbar(lsb_f)
scr["command"] = lb.yview
lb["yscrollcommand"] = scr.set
lb.pack(side="left", pady=5)
scr.pack(side="right", pady=5, fill="y")
for z in mylist: lb.insert(END, z)
lb.pack()
Button(root, text='Toggle Selection', command=select_chk).pack(side=LEFT)
Button(root, text='Screen Print Selection', command=pr_chk).pack(side=LEFT)

root.mainloop()