Installation issues: cmake failing on FindNumpy about ccl HOT 5 CLOSED

Under certain conditions (if I run setup.py explicitly) I get the following:

...
Scanning dependencies of target ccllib_swig_compilation
[ 93%] Swig compile ccl.i for python
:3: Error: Unable to find 'python.swg
...

from ccl.

The quick solution, unless you absolutely need to use the system or macports python, is to use conda.

from ccl.

Check if you can import numpy in your python interpreters. cmake obtains include path using python -c "import numpy as n; print(n.__version__); print(n.get_include());", with python replaced by the path to the python interpreter found previously.

from ccl.

Thanks @tilmantroester, I can install with Conda, but the script requires use of namaster (which is not currently hosted on Conda in arm form as far as I can tell, but also is another project I'm struggling to install anyway...) and glass (which is only hosted on PyPi). I'm not very familiar with Conda, and I think it can be set up to mix Conda forge with PyPi so I'm willing to try, but ideally could rely on PyPi entirely.

@hsinfan1996 thanks for the suggestion: the python interpreters can all see numpy. Even running your suggestion outputs:

1.26.3
/Users/Shared/env/py3.11/lib/python3.11/site-packages/numpy/core/include

as expected

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Aha, I got it. I can install directly using python setup.py install. There were only two issues:

1. I had installed swig using macports, but had not pip installed swig
2. I had to force a completely clean install.

Thanks to all who responded. One step forward...

I'd note that I still cannot install via PyPi, but at least I have a working version now :)

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