Using pip to install packages for vim's python 3 on Mac

vim-pip-macos.md

1. Determine vim's python 3 location. From vim:

:py3 import os; print(os.__file__)

It will print something like: /usr/local/opt/python/Frameworks/Python.framework/Versions/3.7/lib/python3.7/os.py

2. From a shell, set a convenience variable based on the above path (note the change from lib/python3.7/os.py to bin/python3):

export VIMPY="/usr/local/opt/python/Frameworks/Python.framework/Versions/3.7/bin/python3"
$VIMPY -m ensurepip

# Install e.g. package1 and package2
$VIMPY -m pip install package1 package2

Best one.