Python Pi Reboot

from gpiozero import Button as realButton#import button from the Pi GPIO library
import time # import time functions
import os #imports OS library for Shutdown control
import RPi.GPIO as GPIO
import alsaaudio
from time import perf_counter, sleep
from tkinter import *
from tkinter.ttk import *
import queue

def button_callback(channel):
    print("Button was pushed!")
def pushedPower():
    time.sleep(0.1) # wait for the hold time we want.
    if stopButton.is_pressed: #check if the user let go of the button
        time.sleep(0.5)
        if stopButton.is_pressed:
            GPIO.output(18,GPIO.LOW)
            os.system("shutdown now -h") #shut down the Pi -h is or -r will reset
            #print("shutdown")
        else:
            #print("restart")
            GPIO.output(18,GPIO.LOW)
            os.system("shutdown now -r") #shut down the Pi -h is or -r will reset
    #else:
        #print("cancel")

def pushedVolumeUp():
    print("VolUp")
    change = 0
    start = perf_counter()
    while alsaaudio.Mixer().getvolume()[0] < 100 and upButton.is_pressed:
        change = round(((perf_counter() - start)*4)/3 + 1)
        newVolume = alsaaudio.Mixer().getvolume()[0] + change
        if (newVolume > 100):
            newVolume = 100
        alsaaudio.Mixer().setvolume(newVolume)
        window.after(0, updateBar(newVolume))
def pushedVolumeDown():
    print("VolDown")
    change = 0
    start = perf_counter()
    while alsaaudio.Mixer().getvolume()[0] > 0 and downButton.is_pressed:
        change = round(((perf_counter() - start)*4)/3 + 1)
        newVolume = alsaaudio.Mixer().getvolume()[0] - change
        if (newVolume < 0):
            newVolume = 0
        alsaaudio.Mixer().setvolume(newVolume)
        window.after(0, updateBar(newVolume))
def updateBar(change):
    if not window.winfo_viewable():
        window.deiconify()
    progress['value'] = change

def hideBar():
    if not upButton.is_pressed and not downButton.is_pressed:
        window.withdraw()

def releasedVolume():
        window.after(1000, hideBar)

stopButton = realButton(3) # defines the button as an object and chooses GPIO 26
stopButton.when_pressed = pushedPower

upButton = realButton(6)
downButton = realButton(5)
upButton.when_pressed = pushedVolumeUp
downButton.when_pressed = pushedVolumeDown
upButton.when_released = releasedVolume
downButton.when_released = releasedVolume

GPIO.setup(18,GPIO.OUT)
print("LED on")
GPIO.output(18,GPIO.HIGH)


window = Tk()
window.overrideredirect(1)
height = window.winfo_screenheight()

# getting screen's width in pixels
width = window.winfo_screenwidth()

barWidth = width/3

barXpos = (int)((width/2)-barWidth/2)

barYpos = (int)(height-100)

window.geometry("+"+str(barXpos)+"+"+str(barYpos))
progress = Progressbar(window, orient = HORIZONTAL,
              length = barWidth, mode = 'determinate')

progress.pack(pady = 0)

#window.wait_visibility(window)

#window.wm_attributes('-alpha', 0.8)

progress['value'] = alsaaudio.Mixer().getvolume()[0]
window.update_idletasks()
window.withdraw()
progress.pack(pady = 0)

window.mainloop()

GPIO.setup(10, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
while True:
    GPIO.wait_for_edge(10,GPIO.RISING)

#pause()