code: def test_create_hostlist_arg() -> None:
      assert "localhost:8,128.140.2.4:8" == horovod.create_hostlist_arg(
          ip_addresses=["localhost", "128.140.2.4"],
          host_slot_counts=[8, 8],
      )
  
label_desc: Use image node_id 2 for calling a global function with example usage: test_create_hostlist_arg() without return types