code: def test_null_to_p_float_error(null):
      with pytest.raises(ValueError):
          _utils.null_to_p(9, null, alternative="raise")
  
imports: import math
  import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal
  from scipy.ndimage import generate_binary_structure
  from nilearn.mass_univariate import _utils
  from nilearn.mass_univariate.tests._testing import get_tvalue_with_alternative_library
label_desc: Use image node_id 7 for calling a global function with example usage: test_null_to_p_float_error(null) without return types