Installation fails: numpy/arrayobject.h not found

[larryluer]

This happens on both ubuntu 18.04 and Windows 10, using both numpy 1.13.1 and 1.17.
In a Python 3.6.8 virtual environment, calling pip install phoenics fails with the following error:

phoenics/BayesianNeuralNetwork/dist evaluations.c:611:10 fatal error: numpy/arrayobject.h: no such file or directory.

On Win 10, the requested header file is in the folder
C:\Users\Larry\Documents\vscodeprojs\people.venv36\Lib\site-packages\numpy\core\include\numpy

Why is it not found by the include command?
Thanks for help, Larry

[FlorianHase]

Hi Larry,
thank you for reaching out and for reporting this issue. It seems as if the paths to your numpy installation are not set as expected. Running

sudo apt-get install python-dev

should set /usr/include/numpy to the correct path.
Hope this helps, but please let me know of the problem persists.
Cheers

[larryluer]

Dear Florian, thanks for your fast response; I will try this out on my ubuntu machine at home tonight. How would I solve it on Windows? I could create symbolic links if I knew where the compiler expects the headers to be. Would that work? Thanks again, best regards Larry

…

________________________________ Von: Florian Häse <notifications@github.com> Gesendet: Mittwoch, 23. Oktober 2019 00:29:47 An: aspuru-guzik-group/phoenics Cc: Lüer, Larry; Author Betreff: Re: [aspuru-guzik-group/phoenics] Installation fails: numpy/arrayobject.h not found (#4) Hi Larry, thank you for reaching out and for reporting this issue. It seems as if the paths to your numpy installation are not set as expected. Running sudo apt-get install python-dev should set /usr/include/numpy to the correct path. Hope this helps, but please let me know of the problem persists. Cheers — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#4?email_source=notifications&email_token=ANSCUSZZHQ6H77VIG4LWMNTQP55FXA5CNFSM4JDXEIPKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEB7NOPI#issuecomment-545183549>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ANSCUS6EZFHJFE3O4JTK3TDQP55FXANCNFSM4JDXEIPA>.

[TBlackmore]

Hi Florian and Larry,

I've had the same problem today on my Windows10 machine. I eventually got it to install by editing setup.py.

Changed
ext_modules = ext_modules
to
ext_modules = ext_modules, include_dirs=[numpy.get_include()]

after following advice from this stack overflow

I have yet to test if it works beyond installation but I thought I would share my small success.

Cheers,
Tim

[dking072]

I had the problem on mac when I tried pip install. Followed the instructions here and it worked:

http://notesbyanerd.com/2018/11/02/pip-install-cant-find-numpy-header/