def del_unn(d):
    for s in ['updatedAt', 'createdAt', 'id', 'project_id', 'group_id', 'class_id', 'count']:
        if (s in d):
            del d[s]
def del_unn(d):
    for s in ['updatedAt', 'createdAt', 'id', 'project_id', 'group_id', 'class_id', 'count']:
        if (s in d):
            del d[s]