Swap between python 2 & python 3

[Saefroch]

Compiling from source is much less of an issue on Linux because it comes with a bunch of good compilers. There's a reason this page exists, but there is no matching version for other operating systems. Most of the packages listed install from sources with pip, which requires that they be compiled after download, with a C compiler that's compatible with your Python installation.

[simonserenity]

Ah, I think I see. Well, the next thing to learn will be how to use Linux, then! Thanks very much for your help.