iterator.py

#aDir is a directory path
names = glob.glob(aDir + "/*.png") #file type of the packable images

#append to the list of image objects
if names:
	images.extend(names);

# then sort later: 
sortedImages = sorted([(i.size[1], name, i) for name,i in ((x,Image.open(x)) for x in images)], reverse=True)