ARCHIVED: How to get NumPy and SciPy working in a virtualenv under Mac OS X

README.md

ARCHIVED: How to get NumPy and SciPy working in a virtualenv under Mac OS X

Please don't use this method any more, this is ages old (2014, Python 2.7).

Assuming you use virtualenv for Python library hygiene. Now you want Numpy and Scipy in your project.

NumPy and SciPy can not be easily installed under Mac OS X with a simple

pip install scipy

due to heavy dependencies.

However, homebrew-python provides them as recipes. Therefore you can

1. install numpy and scipy from homebrew-python
2. symlink them into a virtualenv

Try it:

brew install homebrew/python/scipy
python -m virtualenv venv-playground
ln -s /usr/local/lib/python2.7/site-packages/{numpy,scipy}* venv-playground/lib/python2.7/site-packages/
source venv-playground/bin/activate
pip freeze

You should see something like this:

numpy==1.9.0
scipy==0.14.0
wsgiref==0.1.2

So I installed scipy using MacPorts, and linked it to lib/python3.10/site-packages, which is where the virtualenv installed by MacPorts installs packages (I installed numpy using pip to test). Then I activated the virtual environment and did pip freeze. It only shows numpy==1.22.2 but not scipy. Is there an additional step needed to let pip know that scipy is available? It keeps trying to rebuild it when installing other packages!

Sorry, this gist is ages old and I don't recommend this method any more.

Probably why it doesn't work! Oh well.