PyNEC installation via pip fails

[dl2sen]

Hallo,

trying to install PyNEC via pip on a Ubuntu 24.04 within a venv yields following outcome. The message confuses me, since numpy is definetely installed.

Any help from you would be appreciated.

Oli

Collecting pynec Using cached PyNEC-1.7.3.6.tar.gz (24 kB) 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 ╰─> [20 lines of output] Traceback (most recent call last): File "/home/oliver/workspace/venv/rf/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in main() File "/home/oliver/workspace/venv/rf/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main json_out['return_val'] = hook(**hook_input['kwargs']) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/oliver/workspace/venv/rf/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 118, in get_requires_for_build_wheel return hook(config_settings) ^^^^^^^^^^^^^^^^^^^^^ File "/tmp/pip-build-env-ldmo24kb/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 334, in get_requires_for_build_wheel return self._get_build_requires(config_settings, requirements=[]) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/tmp/pip-build-env-ldmo24kb/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 304, in _get_build_requires self.run_setup() File "/tmp/pip-build-env-ldmo24kb/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 522, in run_setup super().run_setup(setup_script=setup_script) File "/tmp/pip-build-env-ldmo24kb/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 320, in run_setup exec(code, locals()) File "", line 12, in ModuleNotFoundError: No module named 'numpy' [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.

[myzinsky]

Same issue here, also with uv

❯ uv pip install pyNEC
  × Failed to download and build `pynec==1.7.3.6`
  ╰─▶ Build backend failed to determine requirements with `build_wheel()` (exit status: 1)

      [stderr]
      Traceback (most recent call last):
        File "<string>", line 14, in <module>
          requires = get_requires_for_build({})
        File "/Users/myzinsky/.cache/uv/builds-v0/.tmpqKEMMt/lib/python3.13/site-packages/setuptools/build_meta.py", line 334, in
      get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/Users/myzinsky/.cache/uv/builds-v0/.tmpqKEMMt/lib/python3.13/site-packages/setuptools/build_meta.py", line 304, in
      _get_build_requires
          self.run_setup()
          ~~~~~~~~~~~~~~^^
        File "/Users/myzinsky/.cache/uv/builds-v0/.tmpqKEMMt/lib/python3.13/site-packages/setuptools/build_meta.py", line 522, in run_setup
          super().run_setup(setup_script=setup_script)
          ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/Users/myzinsky/.cache/uv/builds-v0/.tmpqKEMMt/lib/python3.13/site-packages/setuptools/build_meta.py", line 320, in run_setup
          exec(code, locals())
          ~~~~^^^^^^^^^^^^^^^^
        File "<string>", line 12, in <module>
          get_requires_for_build = getattr(backend, "get_requires_for_build_wheel", None)
          ^^^^^^^^^^^^^^^^^^
      ModuleNotFoundError: No module named 'numpy'

[konstantgr]

Hi! I've recently got the same problem.

The updating wheel package via

pip install --upgrade wheel

solved my problem for PyNEC==1.7.3.4 version. I've tried it on Python 3.11.