@synchronized('daemon-client-lock')
    def _get_client(cls, rootwrap_config):
        try:
            return cls._clients[rootwrap_config]
        except __HOLE__:
            from oslo_rootwrap import client
            new_client = client.Client([
                "sudo", "nova-rootwrap-daemon", rootwrap_config])
            cls._clients[rootwrap_config] = new_client
            return new_client
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/utils.py/RootwrapDaemonHelper._get_client