def METHOD_NAME(self, iam_ns_ids: List[str]) -> Dict[str, Dict]:
    """
    计算出 iam_ns_id 和命名空间信息的映射表
    :param iam_ns_ids: iam_ns_id 列表。iam_ns_id 的计算规则查看 calc_iam_ns_id 函数的实现
    :return 映射表. 如 {'40000:70815bb9te': {'name': 'test-default', 'creator': 'admin', ...}
    """
    iam_cluster_ns = {}
    cluster_set = {f"BCS-K8S-{iam_ns_id.split(':')[0]}" for iam_ns_id in iam_ns_ids}
    shared_cluster_ids = [cluster['cluster_id'] for cluster in get_shared_clusters()]
    for cluster_id in cluster_set:
        for ns in self._list_namespaces_by_cluster(cluster_id, shared_cluster_ids):
            iam_cluster_ns[calc_iam_ns_id(cluster_id, ns['name'])] = ns
    return iam_cluster_ns