def _check_docker_image(args):
    for image in subprocess.check_output(["docker", "images"]).split("\n"):
        parts = image.split()
        if len(parts) > 1 and parts[0] == args.image:
            return
    raise ValueError("Could not find docker image %s in local repository" % args.image)
Set cron_times, reset time & step.
dataset/ETHPy150Open chapmanb/bcbio-nextgen-vm/bcbiovm/docker/install.py/_check_docker_image--crossover with--dataset/ETHPy150Open lyda/chkcrontab/chkcrontab_lib.py/action_star_step_comma