def retrieve_section_placements(section):
    cache_key = PLACEMENTS_KEY_FORMAT.format(section.pk)
    placements = cache.get(cache_key, None)
    if placements is None:
        placements = Placement.objects.filter(sections=section).select_related('size')
        if CACHE_TIMEOUT:
            placements = list(placements)
            cache.set(cache_key, placements, CACHE_TIMEOUT)
    return placements
Update device settings for the network's DHCP on this host.
dataset/ETHPy150Open mlavin/django-ad-code/adcode/models.py/retrieve_section_placements--crossover with--dataset/ETHPy150Open openstack/neutron/neutron/agent/linux/dhcp.py/DeviceManager.update