Upgrading from 2.7 to 3.x

[deuteros]

I'm fairly new to Python I have version 2.7 installed on my computer. However 
my professor wants us all to use the latest version of Python. How do I go 
about upgrading? Do I just install the new version? Do I have to do anything 
with the old version already installed?
-- 
http://mail.python.org/mailman/listinfo/python-list