def retention_policy_alter(database, name, duration, replication, default=False, user=None, password=None, host=None, port=None):
 client = _client(user=user, password=password, host=host, port=port)
 client.alter_retention_policy(name, database, duration, replication, default)
 return True

def retention_policy_alter ( database , name , duration , replication , default = False , user = None , password = None , host = None , port = None ) : client = _client ( user = user , password = password , host = host , port = port ) client . alter_retention_policy ( name , database , duration , replication , default ) return True
modify an existing retention policy .