from Tkinter import * #This interface allow us to draw windows
def DrawList():
plist = ['Liz','Tom','Chi']
for item in plist:
listbox.insert(END,item);
root = Tk() #This creates a window, but it won't show up
listbox = Listbox(root)
button = Button(root,text = "press me",command = DrawList)
button.pack()
listbox.pack() #this tells the listbox to come out
root.mainloop() #This command will tell the window come out