[Tutor] how can i use python 2 alongside 3?

[Matthew Ngaha]

>
> Python 3.3 for Windows comes with a "launcher", which will approximate (for
> Python only) what Unix and Linux users have had for years for any scripting
> language.  You can get it separately, as Mark Lawrence has said, but maybe
> it's time to bring your 3.x current.
>
there was a lot of reading in the previous links, i got a bit lost as
i didnt recognize a lot of the words they were using. If i install
Pyhon 3.3 do i need to uninstall my current python 3.1 and reinstall
all the downloaded modules/packages i installed?