code: def test_dateheader(self):
      with open(test7) as ofile:
          rel, attrs = read_header(ofile)
  
      assert_(rel == "test7")
  
      assert_(len(attrs) == 5)
  
      assert_(attrs[0].name == "attr_year")
      assert_(attrs[0].date_format == "%Y")
  
      assert_(attrs[1].name == "attr_month")
      assert_(attrs[1].date_format == "%Y-%m")
  
      assert_(attrs[2].name == "attr_date")
      assert_(attrs[2].date_format == "%Y-%m-%d")
  
      assert_(attrs[3].name == "attr_datetime_local")
      assert_(attrs[3].date_format == "%Y-%m-%d %H:%M")
  
      assert_(attrs[4].name == "attr_datetime_missing")
      assert_(attrs[4].date_format == "%Y-%m-%d %H:%M")
  
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 4 for calling the TestHeader obj's underlying member method code with example usage: obj.test_dateheader() without return types