code: def test_v_equal_one(self):
      assert_almost_equal(0.1, psturng(0.2, 5, 1), 5)
  
imports: from statsmodels.compat.python import lzip, lmap
  from numpy.testing import assert_equal, assert_almost_equal, assert_array_almost_equal, assert_raises
  import numpy
  import pytest
  from statsmodels.stats.libqsturng import qsturng, psturng
label_desc: Use image node_id 3 for calling the TestPsturng obj's underlying member method code with example usage: obj.test_v_equal_one() without return types