import tkinter as tk

window = tk.Tk()
window.title('my window')
window.geometry('200x200')

var1 = tk.StringVar()
l = tk.Label(window, bg='yellow', width=4, textvariable=var1)
l.pack()

def print_selection():
    value = lb.get(lb.curselection())
    var1.set(value)



b1 = tk.Button(window, text='print selection', width=15, height=2,
    command=print_selection)
b1.pack()

var2 = tk.StringVar()
var2.set((11,22,33,44))
lb = tk.Listbox(window,listvariable=var2)
list_items = [1,2,3,4]
for item in list_items:
    lb.insert('end',item)   #在最后插入item
lb.insert(1,'first')        #在第一行插入
lb.insert(2,'second')       #在第二行插入
lb.delete(2)                #删除第二行
lb.pack()

window.mainloop()