code: def import_folder():
      tol_time = 200  # comparing in ms or ns for timestamp columns
      tol_numeric = 1e-5  # tolerance for comparing other numeric fields
      numElements2Compare = 0  # choose number of elements per column to compare.  Save test time.
  
      multi_file_gzip_comp = h2o.import_file(
          path=pyunit_utils.locate(
              "smalldata/parser/hexdev_497/airlines_small_csv.zip"
          )
      )
      multi_file_csv = h2o.import_file(
          path=pyunit_utils.locate(
              "smalldata/parser/hexdev_497/airlines_small_csv/all_airlines.csv"
          )
      )
  
      # make sure H2O frames built from a zip file of a directory and the original files are the same.
      assert pyunit_utils.compare_frames(
          multi_file_csv,
          multi_file_gzip_comp,
          numElements2Compare,
          tol_time,
          tol_numeric,
          True,
      ), "H2O frame parsed from zip directory and unzipped directory are different!"
  
label_desc: Use image node_id 1 for calling a global function with example usage: import_folder() without return types