深入淺出程式設計

354 第十章

心中有物件

下面程式碼來自於上一章。仔細研究一下，接著，在下一頁空白處寫下你的新函式

（根據下列程式碼）。

from tkinter import *

import pygame.mixer

app = Tk()

app.title("Head First Mix")

sound_file = "50459_M_RED_Nephlimizer.wav"

mixer = pygame.mixer

mixer.init()

def track_toggle():

if track_playing.get() == 1:

track.play(loops = -1)

else:

track.stop()

def change_volume(v):

track.set_volume(volume.get())

track = mixer.Sound(sound_file)

track_playing = IntVar()

track_button = Checkbutton(app, variable = track_playing,

command = track_toggle, text = sound_file)

track_button.pack(side = LEFT)

volume = DoubleVar()

volume.set(track.get_volume())

volume_scale = Scale(variable = volume, from_ = 0.0, ...