def command_error_fmt(cmd_name, exception):
    return "pyleus {0}: error: {1}".format(cmd_name, str(exception))
Assumes that the value for a given key is going to be a list
dataset/ETHPy150Open Yelp/pyleus/pyleus/exception.py/command_error_fmt--crossover with--dataset/ETHPy150Open ceph/ceph-deploy/ceph_deploy/conf/cephdeploy.py/Conf.get_list