old_contents: from mpi4py import MPI
  
  
  def print_rank0(comm, str):
      if comm.Get_rank() == 0:
          lines = str.split('\n')
          prefix = '{:02d}: '.format(MPI.COMM_WORLD.Get_rank())
          str = ('\n'+prefix).join(lines)
          str = prefix+str
          print str
  
  
  def print_all_ranks(comm, str):
      print "Rank {}({}): ".format(comm.Get_rank(), MPI.COMM_WORLD.Get_rank())+str
  
new_contents: from mpi4py import MPI
  
  
  def print_rank0(comm, str):
      if comm.Get_rank() == 0:
          lines = str.split('\n')
          prefix = '{:02d}: '.format(MPI.COMM_WORLD.Get_rank())
          str = ('\n'+prefix).join(lines)
          str = prefix+str
          print(str)
  
  
  def print_all_ranks(comm, str):
      print "Rank {}({}): ".format(comm.Get_rank(), MPI.COMM_WORLD.Get_rank())+str
  
subject: Update printutil.py