code: def prepare_run(run_id, run_data):
      
      idf, kwargs = run_data
      epw = idf.epw
      idf_dir = os.path.join('multi_runs', 'idf_%i' % run_id)
      os.mkdir(idf_dir)
      idf_path = os.path.join(idf_dir, 'in.idf')
      idf.saveas(idf_path)
      return (idf_path, epw), kwargs
docs: Prepare run inputs for one of multiple EnergyPlus runs.
  
      :param run_id: An ID number for naming the IDF.
      :param run_data: Tuple of the IDF and keyword args to pass to EnergyPlus executable.
      :return: Tuple of the IDF path and EPW, and the keyword args.