def purge_network(network_id, purge_data,**kwargs):
    """
        Remove a network from DB completely
        Use purge_data to try to delete the data associated with only this network.
        If no other resources link to this data, it will be deleted.

    """
    user_id = kwargs.get('user_id')
    try:
        net_i = db.DBSession.query(Network).filter(Network.id == network_id).one()
    except NoResultFound:
        raise ResourceNotFoundError("Network %s not found"%(network_id))

    log.info("Deleting network %s, id=%s", net_i.name, network_id)

    net_i.check_write_permission(user_id)
    db.DBSession.delete(net_i)
    db.DBSession.flush()
    return 'OK'
Remove a network from DB completely
        Use purge_data to try to delete the data associated with only this network.
        If no other resources link to this data, it will be deleted.