numpy.distutils is deprecated.

[matusvalo]

Describe your issue

When running test suite, I have discovered following warning:

[-1] compiling (c/cy2) and running numpy_cimport ...
=== C/C++ compiler error output: ===
/Users/ness-skmac3/dev/cython/runtests.py:250: DeprecationWarning:

  `numpy.distutils` is deprecated since NumPy 1.23.0, as a result
  of the deprecation of `distutils` itself. It will be removed for
  Python >= 3.12. For older Python versions it will remain present.
  It is recommended to use `setuptools < 60.0` for those Python versions.
  For more details, see:
    https://numpy.org/devdocs/reference/distutils_status_migration.html


  from numpy.distutils.misc_util import get_info
====================================

Moreover, numpy.distutils is also used here:

cython/Demos/setup.py

Line 15 in 6ad6ca0

from numpy.distutils.misc_util import get_numpy_include_dirs

I suppose it should be fix before python 3.12. Ref. numpy/numpy#18588

[matusvalo]

@mattip is there any preferred way how to replace mentioned functions? I was not able to figure out from the documentation (but I did not go deep to be honest).

[da-woods]

Does numpy.get_include() work for the directories? (I haven't looked to see if there's anything else we use)

[mattip]

I only see those two

$ git grep "numpy.distutils"
Demos/setup.py:    from numpy.distutils.misc_util import get_numpy_include_dirs
runtests.py:    from numpy.distutils.misc_util import get_info

The first has been moved, as you said, to numpy.get_include()
The second is a little more involved. We prefer people move away from setup.py to meson. There is still an example setup.py in the 1.25 docs. The recommended pattern is to use

defs = [('NPY_NO_DEPRECATED_API', 0)]
inc_path = np.get_include()
# Add paths for npyrandom and npymath libraries:
lib_path = [
    abspath(join(np.get_include(), '..', '..', 'random', 'lib')),
    abspath(join(np.get_include(), '..', 'lib'))
]
ext = Extension("extending_distributions",
                          sources=[join('.', 'extending_distributions.pyx')],
                          include_dirs=[inc_path],
                          library_dirs=lib_path,
                          libraries=['npyrandom', 'npymath'],
                          define_macros=defs,
                          )