On 15 November 2017 at 16:13, Steve Barnes <gadgetsteve@live.co.uk> wrote:

  - "pip -X[.Y][-32|-64] operation ..." tries to find a python matching
-X[.Y][-32|-64] and if it succeeds executes "python -m pip operation
..." with that python, (if it doesn't find a matching python is should
fail with a sensible error message and possibly list the valid python
specifiers).

This is a genuinely interesting option, especially as `pipenv` has already implemented a feature somewhat akin to this: https://docs.pipenv.org/basics.html#specifying-versions-of-python

`pipenv` also allows `pipenv --two` and `pipenv --three` when setting up your initial virtual environment.

Cheers,

Nick.