code: def test_stdtridf(self):
      _assert_inverts(
          sp.stdtridf, _student_t_cdf, 0, [ProbArg(), Arg()], rtol=1e-7
      )
  
imports: import itertools
  import numpy
  from numpy.testing import assert_equal, assert_allclose
  import pytest
  import scipy.special
  from scipy.special._testutils import MissingModule, check_version, FuncData
  from scipy.special._mptestutils import Arg, IntArg, get_args, mpf2float, assert_mpmath_equal
label_desc: Use image node_id 10 for calling the TestCDFlib obj's underlying member method code with example usage: obj.test_stdtridf() without return types