text: import os, sys
  import pytest
  import warnings
  import shutil
  import subprocess
  
  try:
      import cffi
  except ImportError:
      cffi = None
  
  if sys.flags.optimize > 1:
      # no docstrings present to inspect when PYTHONOPTIMIZE/Py_OptimizeFlag > 1
      # cffi cannot succeed
      cffi = None
  
  try:
      with warnings.catch_warnings(record=True) as w:
          # numba issue gh-4733
          warnings.filterwarnings('always', '', DeprecationWarning)
          import numba
  except ImportError:
      numba = None
  
  try:
      import cython
      from Cython.Compiler.Version import version as cython_version
  except ImportError:
      cython = None
  else:
      from distutils.version import LooseVersion
      # Cython 0.29.14 is required for Python 3.8 and there are
      # other fixes in the 0.29 series that are needed even for earlier
      # Python versions.
      # Note: keep in sync with the one in pyproject.toml
      required_version = LooseVersion('0.29.14')
      if LooseVersion(cython_version) < required_version:
          # too old or wrong cython, skip the test
          cython = None
  
  @pytest.mark.skipif(cython is None, reason="requires cython")
  @pytest.mark.slow
  def test_cython(tmp_path):
      examples = os.path.join(os.path.dirname(__file__), '..', '_examples')
      # CPython 3.5 and below does not handle __fspath__ well: see bpo-26027
      shutil.copytree(examples, str(tmp_path / '_examples'))
      subprocess.check_call([sys.executable, 'setup.py', 'build'],
                            cwd=str(tmp_path / '_examples' / 'cython'))
  
  @pytest.mark.skipif(numba is None or cffi is None,
                      reason="requires numba and cffi")
  def test_numba():
      from numpy.random._examples.numba import extending
  
  @pytest.mark.skipif(cffi is None, reason="requires cffi")
  def test_cffi():
      from numpy.random._examples.cffi import extending
  