Retroflag/NESPi Shutdown Script - Reset = Game Exit

#!/usr/bin/python
import RPi.GPIO as GPIO
import os, time

GPIO.setmode(GPIO.BCM)
GPIO.setup(23, GPIO.IN, pull_up_down=GPIO.PUD_UP) #Reset switch
GPIO.setup(24, GPIO.IN, pull_up_down=GPIO.PUD_UP) #Power switch
GPIO.setup(25, GPIO.OUT) #ON control
GPIO.output(25, GPIO.HIGH)

def exitEmulator(channel):
    print('exitEmulator')
    pids = [pid for pid in os.listdir('/proc') if pid.isdigit()]

    for pid in pids:
        try:
            commandpath = open(os.path.join('/proc', pid, 'cmdline'), 'rb').read()
            if commandpath[0:24] == '/opt/retropie/emulators/':
                os.system('kill -QUIT %s' % pid)
                print('kill -QUIT %s' % pid)
        except IOError:
            continue
GPIO.add_event_detect(23, GPIO.FALLING, callback=exitEmulator, bouncetime=500)

while True:
  if (GPIO.input(24)):
    time.sleep(0.25)
  else:
    print ("Shutting down...")
    os.system("sudo shutdown -h now")
    break