code: def maketemp(prefix):
      fd, name = tempfile.mkstemp(prefix=prefix)
      os.close(fd)
      return name
  
imports: from mpi4py import MPI
  import mpiunittest
  import os, tempfile, pathlib
label_desc: Use image node_id 1 for calling a global function with example usage: maketemp(prefix) and returns: name