QR Code Reader For the Raspberry Pi

QR_Code_read.py

import os
import subprocess
from PIL import Image
import zbarlight
import pygame, sys
from pygame.locals import *
global DISPLAYSURF, FPSCLOCK
pygame.init()
DISPLAYSURF = pygame.display.set_mode((400, 300))
pygame.display.set_caption("QR code reader")
FPSCLOCK = pygame.time.Clock()
def read_QR():
    print('Read QR')
    subprocess.call("raspistill -w %s -h %s -o test.png" % (640, 480), shell = True)

    file_path = '/home/pi/Edmond/test.png'
    with open(file_path, 'rb') as image_file:
        image = Image.open(image_file)
        image.load()

    codes = zbarlight.scan_codes('qrcode', image)
    try:
        for item in codes:
            QR_codes = item
            print(str(QR_codes))
            print(QR_codes.decode('UTF-8'))
    except:
        print("Could not read QR")
while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == KEYDOWN:
            print('Button Pressed Down')
            if event.type == KEYDOWN:
                print("read QR")
                read_QR()
    pygame.display.update()
    FPSCLOCK.tick(60)