code: def import_folder():
      """
      This test will build a H2O frame from importing the bigdata/laptop/parser/orc/airlines_05p_orc_csv
      from and build another H2O frame from the multi-file orc parser using multiple orc files that are
      saved in the directory bigdata/laptop/parser/orc/airlines_05p_orc.  It will compare the two frames
      to make sure they are equal.
      :return: None if passed.  Otherwise, an exception will be thrown.
      """
      csv = h2o.import_file(
          path=pyunit_utils.locate(
              "smalldata/parser/csv2orc/prostate_NA.csv"
          ),
          na_strings=["\\N"],
      )
      multi_file_orc1 = h2o.import_file(
          path=pyunit_utils.locate(
              "smalldata/parser/orc/prostate_NA.orc"
          )
      )
      pyunit_utils.compare_frames_local(
          csv, multi_file_orc1, prob=0.01
      )  # should be the same here.
  
      path = pyunit_utils.locate("smalldata/parser/orc/prostate_NA.orc")
      skip_all = list(range(csv.ncol))
      skip_even = list(range(0, csv.ncol, 2))
      skip_odd = list(range(1, csv.ncol, 2))
      skip_start_end = [0, csv.ncol - 1]
      skip_except_last = list(range(0, csv.ncol - 2))
      skip_except_first = list(range(1, csv.ncol))
      temp = list(range(0, csv.ncol))
      random.shuffle(temp)
      skip_random = []
      for index in range(0, csv.ncol // 2):
          skip_random.append(temp[index])
      skip_random.sort()
  
      try:
          loadFileSkipAll = h2o.upload_file(
              path, skipped_columns=skip_all
          )
          sys.exit(1)  # should have failed here
      except Exception as ex:
          print(ex)
          pass
  
      try:
          importFileSkipAll = h2o.import_file(
              path, skipped_columns=skip_all
          )
          sys.exit(1)  # should have failed here
      except Exception as ex:
          print(ex)
          pass
  
      # skip even columns
      pyunit_utils.checkCorrectSkips(csv, path, skip_even)
  
      # skip odd columns
      pyunit_utils.checkCorrectSkips(csv, path, skip_odd)
  
      # skip the very beginning and the very end.
      pyunit_utils.checkCorrectSkips(csv, path, skip_start_end)
  
      # skip all except the last column
      pyunit_utils.checkCorrectSkips(csv, path, skip_except_last)
  
      # skip all except the very first column
      pyunit_utils.checkCorrectSkips(csv, path, skip_except_first)
  
      # randomly skipped half the columns
      pyunit_utils.checkCorrectSkips(csv, path, skip_random)
  
imports: import sys
  import h2o
  from tests import pyunit_utils
  import random
label_desc: Use image node_id 1 for calling a global function with example usage: import_folder() without return types