code: def test_special(self):
      # TODO: add attributes to other cases and move to superclass
      assert_almost_equal(
          self.res1.tconfint_diff, self.res2.ci_diff, decimal=13
      )
      assert_almost_equal(
          self.res1.mean_diff, self.res2.mean_diff, decimal=13
      )
      assert_almost_equal(
          self.res1.std_mean_diff, self.res2.se_diff, decimal=13
      )
      # compare with ttest
      assert_almost_equal(
          self.res1.confint_05, self.res2b.conf_int, decimal=13
      )
  
imports: import numpy
  from numpy.testing import assert_almost_equal, assert_equal, assert_
  import pytest
  import statsmodels.stats.weightstats
  from statsmodels.tools.testing import Holder
label_desc: Use image node_id 2 for calling the TestTostp1 obj's underlying member method code with example usage: obj.test_special() without return types