code: def __init__(self, mpi_comm):
      super(NaiveCommunicator, self).__init__(mpi_comm)
  
imports: from chainermn.communicators import _memory_utility
  from chainermn.communicators import mpi_communicator_base
label_desc: Use image node_id 1 to create a new NaiveCommunicator object from inherited base classes: mpi_communicator_base with example: obj = NaiveCommunicator(mpi_comm)