It says numpy not installed even though it is installed. I thought may be the venv is not accessible to pip (which it should be, because numpy is installed inside the venv) and I installed it system wide using sudo apt install python3-numpy as you can see in the very last of the following snippet.
vanangamudi@kaithadi:~/code/bec-gp/BEC_GP
$ workon gpinn
(gpinn) vanangamudi@kaithadi:~/code/bec-gp/BEC_GP
$ pip install trottersuzuki
Collecting trottersuzuki
Using cached trottersuzuki-1.6.2.tar.gz (218 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/vanangamudi/.virtualenvs/gpinn/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
main()
File "/home/vanangamudi/.virtualenvs/gpinn/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/vanangamudi/.virtualenvs/gpinn/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-d6cdwe1m/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 332, in get_requires_for_build_wheel
return self._get_build_requires(config_settings, requirements=[])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/tmp/pip-build-env-d6cdwe1m/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 302, in _get_build_requires
self.run_setup()
File "/tmp/pip-build-env-d6cdwe1m/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 503, in run_setup
super().run_setup(setup_script=setup_script)
File "/tmp/pip-build-env-d6cdwe1m/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 318, in run_setup
exec(code, locals())
File "<string>", line 6, in <module>
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.
(gpinn) vanangamudi@kaithadi:~/code/bec-gp/BEC_GP
$ python -c 'import numpy'
(gpinn) vanangamudi@kaithadi:~/code/bec-gp/BEC_GP
$ python -c 'import matplotlib'
Traceback (most recent call last):
File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'matplotlib'
(gpinn) vanangamudi@kaithadi:~/code/bec-gp/BEC_GP
$
trottersuzuki doesn't provide binary wheels, only sdist. When installing from a source distribution modern pip first build a wheel in a new isolated virtual environment. In this isolated venv there is no numpy. For pip to install numpy during build phase there must be a file pyproject.toml in the package that lists numpy as a build dependency. But there is no such file. I advice to report it… oh, I see you've already reported the bug; you should told this in the question.
Until the bug is fixed there is workaround: disable build isolation:
$ pip install numpy setuptools
$ pip install --no-build-isolation trottersuzuki