code: def modis_l3_file(tmpdir_factory, f_prefix, var_name, f_short):
      """Create a MODIS L3 file of the desired type."""
      filename = generate_nasa_l3_filename(f_prefix)
      full_path = str(tmpdir_factory.mktemp("modis_l3").join(filename))
      variable_infos = _get_l3_refl_variable_info(var_name)
      create_hdfeos_test_file(
          full_path,
          variable_infos,
          _create_struct_metadata_cmg(f_short),
          _create_core_metadata(f_short),
          _create_header_metadata(),
      )
      return [full_path]
  
imports: from __future__ import annotations
  from datetime import datetime, timedelta
  from typing import Optional
  import numpy
  import pytest
  from pyhdf.SD import SD, SDC
label_desc: Use image node_id 33 for calling a global function with example usage: modis_l3_file(tmpdir_factory, f_prefix, var_name, f_short) and returns: list