python核心编程-GUI程序之标签，按钮，进度条

#!/usr/bin/env python# -*- coding: UTF-8 -*- from Tkinter import *def resize(ev=None):    label.config(font='Helvetica -%d bold' % scale.get())top = Tk()top.geometry()label = Label(top, text = 'hello world!', font = 'Helvetica -12 bold')label.pack(fill=Y,expand=1)scale = Scale(top, from_=10, to=40, orient=HORIZONTAL, command=resize)scale.set(12)scale.pack(fill=X, expand=1)quit = Button(top, text="QUIT", command=top.quit, activeforeground='white', activebackground='red')quit.pack()mainloop()

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