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function created

Here is the code from the end of the previous chapter. You were to study it carefully, and then,
in the space on the next page, write the code for your new function (based on the code below).

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, to = 1.0, resolution = 0.1,
command = change_volume, label = "Volume", orient = HORIZONTAL)
volume_scale.pack(side = RIGHT)

def shutdown():
track.stop()
app.destroy()

app.protocol("WM_DELETE_WINDOW", shutdown)
app.mainloop()

354 Chapter 10