You can have both Python 2 and 3 on your system at the same time.
Depending on if you are running Windows or linux the method is a bit different, but both are easy to do.
If you want it in it's own bubble, just spin up a VM and put the other version there.

This is programming 101. All of our programmers have to setup their PCs with PHP versions 7.3.x, 7.4.x and 8.0.x so they can bounce code off of any of them.
If you can't figure out how to do it, you probably should not be working with code.

-Dave