Connect pyorient to multi-master cluster

I have a multi-master cluster of OrientDB 2.2.37, when I am trying to connect using pyorient, machine got out of memory on db_open. Also, I have not found any way to specify list of nodes of cluster.
So I have 2 questions:

  1. How can I connect to a cluster of nodes?
  2. Does pyorient has any kind of load balancing for cluster?