code: def test_nan_inputs(self, a, b, x):
      assert np.isnan(sc.hyperu(a, b, x)) == np.any(np.isnan([a, b, x]))
  
file_path: scipy/scipy/special/tests/test_hypergeometric.py
imports: import pytest
  import numpy
  from numpy.testing import assert_allclose, assert_equal
  import scipy.special
label_desc: Use image node_id 3 for calling the TestHyperu obj's underlying member method code with example usage: obj.test_nan_inputs(a, b, x) without return types