code: def test_studentization_error():
      def f(x):
          return np.array([x.mean(), 3])
  
      x = np.random.standard_normal(100)
      bs = IIDBootstrap(x)
      with pytest.raises(StudentizationError):
          bs.conf_int(f, 100, method="studentized")
  
imports: from __future__ import annotations
  import copy
  from typing import Callable, NamedTuple
  import warnings
  import numpy
  from numpy.random import RandomState
  from numpy.testing import assert_allclose, assert_equal
  import pandas
  from pandas.testing import assert_frame_equal, assert_series_equal
  import pytest
  import scipy.stats
  from arch.bootstrap import CircularBlockBootstrap, IIDBootstrap, IndependentSamplesBootstrap, MovingBlockBootstrap, StationaryBootstrap
  from arch.bootstrap._samplers_python import stationary_bootstrap_sample
  from arch.bootstrap._samplers_python import stationary_bootstrap_sample_python
  from arch.bootstrap.base import _loo_jackknife
  from arch.utility.exceptions import StudentizationError
label_desc: Use image node_id 33 for calling a global function with example usage: test_studentization_error() and returns: np