code: def next(self):
      #
      incr = 1
      self.child.send(incr, 0, 0)
      ival = self.child.recv(None, 0, 0)
      nxtval = ival
      #
      return nxtval
  
imports: from mpi4py import MPI
  import sys, os
label_desc: Use image node_id 3 for calling the Counter obj's underlying member method code with example usage: obj.next() and returns: nxtval