use Python to display a bitmap when it is modifed (saved)

watch_show_image.py

import os
import time
from PIL import Image
import psutil

filename = './rectangle.png'
modifiedTime = os.stat(filename).st_mtime
while True:
	time.sleep(0.1)
	checkTime = os.stat(filename).st_mtime
	if (checkTime != modifiedTime):
		modifiedTime = checkTime
		print(time.strftime('%Y %m %d %H%M%S', time.localtime()))
		for proc in psutil.process_iter():
			if proc.name() == "display":
				proc.kill()
		im = Image.open(filename)
		im.show()