code: def pubdev_6283():
      data = h2o.import_file(
          pyunit_utils.locate("smalldata/covtype/covtype.20k.data")
      )
      data["C3"] = data["C3"].asfactor()
      stratified = data[54].stratified_split()
      train = data[stratified == "train"]
      test = data[stratified == "test"]
      assert train.nrows + test.nrows == data.nrows
  
      split = data["C3"].stratified_split(test_frac=0.3)
      train = data[split == "train"]
      test = data[split == "test"]
      assert train.nrows + test.nrows == data.nrows
  
      split = train["C3"].stratified_split(test_frac=0.1)
      split.show()
  
label_desc: Use image node_id 1 for calling a global function with example usage: pubdev_6283() without return types