I don't even have Python 3 interpreter currently, and was surprised by this Wikipedia article: link while I searched for 12.04 release date.
It mentiones Python 3.2 as default Python interpreter in Ubuntu 12.04, while IMHO I wouldn't have expected Python 3 so soon.
Is Wikipedia information correct?
I found also this: link but it's not clear as which would be default
12.04 will probably have both 3.2 and 2.7 on the CD - the plan is to port Update Manager to Python 3. Typing
python
at a command prompt will still get you Python 2.7, though.I think the Wikipedia article is giving the most recent version which is installed by default, rather than the 'default Python interpreter'.
To see what version of packages are in use in the different releases of Ubuntu, use http://packages.ubuntu.com.
It shows that Python 3 is not the default in Precise. This site currently isn't suitable for questions of that kind, because this may change tomorrow. It's very difficult for us to manage when a correct answer becomes incorrect.