Error "No module named pip" when building with pip install --use-pep517

[ForceBru]

Cyipopt fails to build when --use-pip517 is passed to pip install cyipopt:

~ $ pip cache purge
Files removed: 6
~ $ /Users/forcebru/mambaforge/bin/python3.10 -m pip install --use-pep517 cyipopt
Collecting cyipopt
  Downloading cyipopt-1.2.0.tar.gz (46 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 46.4/46.4 kB 336.6 kB/s eta 0:00:00
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [43 lines of output]
      /private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/setuptools/installer.py:27: SetuptoolsDeprecationWarning: setuptools.installer is deprecated. Requirements should be satisfied by a PEP 517 installer.
        warnings.warn(
      /Users/forcebru/mambaforge/bin/python3.10: No module named pip
      Traceback (most recent call last):
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/setuptools/installer.py", line 82, in fetch_build_egg
          subprocess.check_call(cmd)
        File "/Users/forcebru/mambaforge/lib/python3.10/subprocess.py", line 369, in check_call
          raise CalledProcessError(retcode, cmd)
      subprocess.CalledProcessError: Command '['/Users/forcebru/mambaforge/bin/python3.10', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/tmpdae3ub3e', '--quiet', 'numpy>=1.15']' returned non-zero exit status 1.
      
      The above exception was the direct cause of the following exception:
      
      Traceback (most recent call last):
        File "/Users/forcebru/mambaforge/lib/python3.10/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 351, in <module>
          main()
        File "/Users/forcebru/mambaforge/lib/python3.10/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 333, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "/Users/forcebru/mambaforge/lib/python3.10/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 118, in get_requires_for_build_wheel
          return hook(config_settings)
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 338, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=['wheel'])
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 320, in _get_build_requires
          self.run_setup()
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 484, in run_setup
          super(_BuildMetaLegacyBackend,
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 335, in run_setup
          exec(code, locals())
        File "<string>", line 26, in <module>
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/setuptools/dist.py", line 874, in fetch_build_eggs
          resolved_dists = pkg_resources.working_set.resolve(
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/pkg_resources/__init__.py", line 815, in resolve
          dist = self._resolve_dist(
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/pkg_resources/__init__.py", line 851, in _resolve_dist
          dist = best[req.key] = env.best_match(
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/pkg_resources/__init__.py", line 1123, in best_match
          return self.obtain(req, installer)
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/pkg_resources/__init__.py", line 1135, in obtain
          return installer(requirement)
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/setuptools/dist.py", line 944, in fetch_build_egg
          return fetch_build_egg(self, req)
        File "/private/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/pip-build-env-sz40fl69/overlay/lib/python3.10/site-packages/setuptools/installer.py", line 84, in fetch_build_egg
          raise DistutilsError(str(e)) from e
      distutils.errors.DistutilsError: Command '['/Users/forcebru/mambaforge/bin/python3.10', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/var/folders/ys/3h0gnqns4b98zb66_vl_m35m0000gn/T/tmpdae3ub3e', '--quiet', 'numpy>=1.15']' returned non-zero exit status 1.
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.
~ [1] $ 

However, /Users/forcebru/mambaforge/bin/python3.10: No module named pip is not true because I'm literally using this exact interpreter to run pip above and it works:

/Users/forcebru/mambaforge/bin/python3.10 -m pip install --use-pep517 cyipopt

This prevents me from installing cyipopt with Poetry: python-poetry/poetry#7368.

Installing without the --use-pep517 option works fine.

[moorepants]

We do not yet support pep517. See #167. I'm closing this since we already have an open issue. Thanks for the report.

[moorepants]

One workaround is to install from the git repository instead of pypi. We have a project.toml file in the git repo now.