code: def test_nodata(self):
      # The file nodata.arff has no data in the @DATA section.
      # Reading it should result in an array with length 0.
      nodata_filename = os.path.join(data_path, "nodata.arff")
      data, meta = loadarff(nodata_filename)
      if sys.byteorder == "big":
          end = ">"
      else:
          end = "<"
      expected_dtype = np.dtype(
          [
              ("sepallength", f"{end}f8"),
              ("sepalwidth", f"{end}f8"),
              ("petallength", f"{end}f8"),
              ("petalwidth", f"{end}f8"),
              ("class", "S15"),
          ]
      )
      assert_equal(data.dtype, expected_dtype)
      assert_equal(data.size, 0)
  
imports: import datetime
  import os
  import sys
  from os.path import join
  from io import StringIO
  import numpy
  from numpy.testing import assert_array_almost_equal, assert_array_equal, assert_equal, assert_
  from pytest import raises
  from scipy.io.arff import loadarff
  from scipy.io.arff._arffread import read_header, ParseArffError
label_desc: Use image node_id 1 for calling the TestNoData obj's underlying member method code with example usage: obj.test_nodata() without return types