name : test_extending.py import os import pytest import shutil import subprocess import sys import warnings import numpy as np from numpy.distutils.misc_util import exec_mod_from_location from numpy.testing import IS_WASM 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, SystemError): # Certain numpy/numba versions trigger a SystemError due to a numba bug numba = None try: import cython from Cython.Compiler.Version import version as cython_version except ImportError: cython = None else: from numpy._utils import _pep440 # Cython 0.29.30 is required for Python 3.11 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 = '0.29.30' if _pep440.parse(cython_version) < _pep440.Version(required_version): # too old or wrong cython, skip the test cython = None @pytest.mark.skipif(IS_WASM, reason="Can't start subprocess") @pytest.mark.skipif(cython is None, reason="requires cython") @pytest.mark.slow def test_cython(tmp_path): srcdir = os.path.join(os.path.dirname(__file__), '..') shutil.copytree(srcdir, tmp_path / 'random') # build the examples and "install" them into a temporary directory build_dir = tmp_path / 'random' / '_examples' / 'cython' subprocess.check_call([sys.executable, 'setup.py', 'build', 'install', '--prefix', str(tmp_path / 'installdir'), '--single-version-externally-managed', '--record', str(tmp_path/ 'tmp_install_log.txt'), ], cwd=str(build_dir), ) # gh-16162: make sure numpy's __init__.pxd was used for cython # not really part of this test, but it is a convenient place to check with open(build_dir / 'extending.c') as fid: txt_to_find = 'NumPy API declarations from "numpy/__init__' for i, line in enumerate(fid): if txt_to_find in line: break else: assert False, ("Could not find '{}' in C file, " "wrong pxd used".format(txt_to_find)) # get the path to the so's so1 = so2 = None with open(tmp_path /'tmp_install_log.txt') as fid: for line in fid: if 'extending.' in line: so1 = line.strip() if 'extending_distributions' in line: so2 = line.strip() assert so1 is not None assert so2 is not None # import the so's without adding the directory to sys.path exec_mod_from_location('extending', so1) extending_distributions = exec_mod_from_location( 'extending_distributions', so2) # actually test the cython c-extension from numpy.random import PCG64 values = extending_distributions.uniforms_ex(PCG64(0), 10, 'd') assert values.shape == (10,) assert values.dtype == np.float64 @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 # noqa: F401 @pytest.mark.skipif(cffi is None, reason="requires cffi") def test_cffi(): from numpy.random._examples.cffi import extending # noqa: F401