from PIL import ImageChops # $ pip install pillow
from pyscreenshot import grab # $ pip install pyscreenshot
from datetime import datetime
import time,sys,re
im = grab(bbox=(160,180,1760,1080))
a=0
while True: # http://effbot.org/zone/pil-comparing-images.htm
diff = ImageChops.difference(grab(bbox=(160,180,1760,1080)), im)
bbox = diff.getbbox()
print(bbox)
if bbox is not None: # exact comparison
img = grab(bbox=(160,180,1760,1080))
now = datetime.now()
date_time = now.strftime("%Y%m%d%H%M%S")
te2=r"e:/te/tu/"+date_time+".jpg"
img.save(te2)
time.sleep(2)
a=a+1
print(a)
im = grab(bbox=(160,180,1760,1080))
else:
time.sleep(2)