No module named 'numpy'

[mmdrahmani]

Hi. When I run this command from within pafprocess directory: swig -python -c++ pafprocess.i && python3 setup.py build_ext --inplace

I get this error: in setup.py", line 2, in import numpy ModuleNotFoundError: No module named 'numpy'

There is a file called numpy.i in this directory, and I also have numpy installed in my environment. So I am wondering what causes this error.

Thanks for your support. Mohammad