Installation error with setuptools==60.1.0

[nzw0301]

The latest setuptools has removed get_versions method according to this PR. But mpi4py uses this method for installation as follows:

mpi4py/conf/mpidistutils.py

Lines 32 to 33 in 499468c

	from distutils import cygwinccompiler as cygcc
	cygcc_get_versions = cygcc.get_versions

As a result, I saw the following error when I tries installing mpi4py

#9 49.81   Traceback (most recent call last):
#9 49.81     File "/usr/local/lib/python3.7/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 363, in <module>
#9 49.81       main()
#9 49.81     File "/usr/local/lib/python3.7/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 345, in main
#9 49.81       json_out['return_val'] = hook(**hook_input['kwargs'])
#9 49.81     File "/usr/local/lib/python3.7/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 130, in get_requires_for_build_wheel
#9 49.81       return hook(config_settings)
#9 49.81     File "/tmp/pip-build-env-24728uki/overlay/lib/python3.7/site-packages/setuptools/build_meta.py", line 163, in get_requires_for_build_wheel
#9 49.81       config_settings, requirements=['wheel'])
#9 49.81     File "/tmp/pip-build-env-24728uki/overlay/lib/python3.7/site-packages/setuptools/build_meta.py", line 143, in _get_build_requires
#9 49.81       self.run_setup()
#9 49.81     File "/tmp/pip-build-env-24728uki/overlay/lib/python3.7/site-packages/setuptools/build_meta.py", line 158, in run_setup
#9 49.81       exec(compile(code, __file__, 'exec'), locals())
#9 49.81     File "setup.py", line 462, in <module>
#9 49.81       from mpidistutils import setup
#9 49.81     File "/tmp/pip-install-e88xwuui/mpi4py_a99d99dc8e2b489fbd0a8152611b34c3/conf/mpidistutils.py", line 29, in <module>
#9 49.81       cygcc_get_versions = cygcc.get_versions
#9 49.81   AttributeError: module 'setuptools._distutils.cygwinccompiler' has no attribute 'get_versions'

More detailed installation procedure is found in https:/optuna/optuna/runs/4625423583?check_suite_focus=true.

[dalcinl]

If setuptools will keep breaking APIs, I'll have a hard time keeping things up to date.

[dalcinl]

Closed via #159.

@nzw0301 Thanks for the report!

[nzw0301]

My pleasure! Thank you so much for your quick fix!

[dalcinl]

Workaround

Set the environment variable SETUPTOOLS_USE_DISTUTILS to stdlib, next install mpi4py.

For example, in a bash or zsh shell:

export SETUPTOOLS_USE_DISTUTILS=stdlib
pip install mpi4py

or

SETUPTOOLS_USE_DISTUTILS=stdlib pip install mpi4py

or using the env command

env SETUPTOOLS_USE_DISTUTILS=stdlib pip install mpi4py

[nzw0301]

I tried installing mpi4py using the workaround:

SETUPTOOLS_USE_DISTUTILS=stdlib pip install -r requirements.txt

where requirements.txt contains mpi4py. The installation was completed successfully with the latest setuptools==60.1.0. Thank you for sharing it!

[aced125]

can we have a release for this please?

[dalcinl]

Resolution

• [BUG] 60.1.0: Installing mpi4py fails with latest setuptools pypa/setuptools#2969
• Merge changes from distutils 2def21c5d74fdd pypa/setuptools#2987