Generator for random JPEG images

dummyimage.py

#!/usr/bin/env python2
# -*- coding: utf-8 -*-
from itertools import izip
from datetime import datetime

from PIL import Image
from numpy.random import randint

x, y = 2560, 1920

def grouper(n, iterable):
    args = [iter(iterable)] * n
    return izip(*args)

def rndnumpy(pixels):
    rand = randint(0, 255, pixels*3)
    return grouper(3, rand)

img = Image.new('RGB', (x, y))
img.putdata(list(rndnumpy(x*y)))
img.save(datetime.now().strftime('IMG_%Y%m%d_%H%M%S.jpg'))