I'd recommend just installing the package via `pacman -Syu python-scipy` – running `pip` (or especially `sudo pip`) is not recommended on Arch-based systems.
If you really need to install it with pip, you'll need the dependencies and makedependencies from python-numpy, preferably with `openblas` instead of `cblas`.
If using `virtualenv`, you'll probably need to initialize it with `virtualenv --system-site-packages`.
If you really need to install it with pip, you'll need the dependencies and makedependencies from python-numpy, preferably with `openblas` instead of `cblas`.
If using `virtualenv`, you'll probably need to initialize it with `virtualenv --system-site-packages`.
