audio_player = Tk()
audio_player.title('Audio Player v1.0')
audio_player.geometry('100x100+570+200')
audio_player.maxsize(height=110, width=220)
audio_player.minsize(height=110, width=220)

def selectFile():
? ? file = filedialog.askopenfile(mode='r', filetypes=[('AudioFile', '*.mp3')])
? ? global filePath
? ? filePath = str(file).split("'")[1]
? ? try:
? ? ? ? playAudio()
? ? except:
? ? ? ? pass

def changeText(text):
? ? if text == 'play':
? ? ? ? return 'pause'
? ? if text == 'pause':
? ? ? ? return 'play'


def playStop():
? ? playBtn.config(text=changeText(playBtn.config('text')[4]))
? ? if playBtn.config('text')[4] == 'pause':
? ? ? ? mixer.music.unpause()
? ? else:
? ? ? ? if playBtn.config('text')[4] == 'play':
? ? ? ? ? ? mixer.music.pause()

def audioINC(y):
? ? mixer.music.set_volume(y + 0.1)
? ? global x
? ? x += 0.1


def audioDEC(y):
? ? mixer.music.set_volume(y - 0.1)
? ? global x
? ? x -= 0.1

def playAudio():
? ? try:
? ? ? ? mixer.init()
? ? ? ? mixer.music.load(filePath)
? ? ? ? mixer.music.set_volume(x)
? ? ? ? playBtn.config(text='pause')
? ? ? ? mixer.music.play()
? ? except:
? ? ? ? pass

frame = Frame(app)
frame.place(x=35, y=20)

openBtn = Button(frame, text='OpenFile', command=selectFile, width=8).grid(row=0, column=1)

audioDec = Button(frame, text='?', command=lambda: audioDEC(x)).grid(row=1, column=0)
playBtn = Button(frame, text='...', command=playStop, width=8)
playBtn.grid(row=1, column=1)
audioInc = Button(frame, text='?', command=lambda: audioINC(x)).grid(row=1, column=2)
restartBtn = Button(frame, text='Restart', command=playAudio, width=8).grid(row=2, column=1)

app.mainloop()