def message_fetch_objects():
    try:
        max_id = Message.objects.only('id').order_by("-id")[0].id
    except IndexError:
        return []
    return Message.objects.select_related().filter(~Q(sender__email='tabbott/extra@mit.edu'),
                                                    id__gt=MESSAGE_CACHE_SIZE - max_id)
dataset/ETHPy150Open zulip/zulip/zerver/lib/cache_helpers.py/message_fetch_objects/swapped operands of `-`