#! /usr/bin/python

#-*-code: utf8 -*-

From Tkinter import *

Category Selection (Framework):

def __init__(self，master=None):

Frame. __init__ (self, master)

Self.label = Label(self，text= "select item ")

self.listBox = Listbox(self，height= 1)

self.button = Button(self，text='V '，command=self.triggle)

self.hideList = True

For I in xrange( 10):

self.listBox.insert(i，' Item%d'%i '

self.label.grid(row=0，column=0，sticky=N)

self.listBox.grid(row=0，column= 1，sticky=N)

self.button.grid(row=0，column=2，sticky=N)

self.grid()

Define a trigger (itself):

^= 1

self . listbox . config(height =[self . listbox . size()， 1][self.hideList])

app = Select()

App.mainloop () is for reference only.