install numpy on python 3.5 Mac OS High sierra
First, you need to activate the virtual environment for the version of python you wish to run. After you have done that then just run "pip install numpy" or "pip3 install numpy".
If you used Anaconda to install python then, after activating your environment, type conda install numpy.
I wanted to install the numpy package for python 3.5 on my Mac OS High Sierra, but I can't seem to make it work.
I have it on python2.7, but I would also like to install it for the next versions. 
Currently, I have installed python 2.7, python 3.5, and python 3.7.
I tried to install numpy using:

brew install numpy --with-python3 (no error)
sudo port install py35-numpy@1.15.4 (no error)
sudo port install py37-numpy@1.15.4 (no error)
pip3.5  install numpy (gives "Could not find a version that satisfies the requirement numpy (from versions: )
No matching distribution found for numpy" )

I can tell that it is not installed because when I type python3 and then import numpy as np gives "ModuleNotFoundError: No module named 'numpy'"
Any ideas on how to make it work?
Thanks in advance.