pipenv / pip download / pip vendor example notepad

[Aaron Gershman]

just writing this down for scratchpad purposes

% pipenv lock -r > foo.txt
% pip download -d vendor -r foo.txt

$ pipenv lock -r > /somewhere-temporary/requirements.txt   # Use -d if you want dev-packages as well.
$ pipenv run pip install -t -r /somewhere-temporary/requirements.txt

etc.