I agree. Third party support for Python3 is pretty good now. But if you have any dependencies you know you're going to need it's a good idea to check beforehand.

There's also the six module if you want to be able to say you support 2 and 3, and want a nice way of papering over the differences.

    http://six.readthedocs.io/

//Ed

> On Mar 7, 2018, at 3:31 PM, Tod Olson <[log in to unmask]> wrote:
> 
> I'd suggest Python 3.
> 
> There are mechanisms for managing virtual environments for Python, like penv, which make it easy to install and switch between versions without confusing the system.
> 
> -Tod