code: def test_special_stats(df, stat):
      all_stats = [st for st in Description.default_statistics]
      all_stats.remove(stat[0])
      res = Description(df, stats=all_stats)
      for val in stat[1]:
          assert val not in res.frame.index
  
file_path: statsmodels/statsmodels/stats/tests/test_descriptivestats.py
imports: import numpy
  from numpy.testing import assert_almost_equal, assert_equal
  import pandas
  import scipy.stats
  import pytest
  from statsmodels.iolib.table import SimpleTable
  from statsmodels.stats.descriptivestats import Description, describe, sign_test
label_desc: Use image node_id 8 for calling a global function with example usage: test_special_stats(df, stat) without return types