I have just installed ubuntu 3.10 and, although this version is still reliant on python 2 as the default, the python 3.3 interpreter is listed as installed in the software centre. Does this mean that python 3.3 is already here somewhere, and if so how do I access it to run my code?

I know there are many questions about installing python 3.3 alongside 2.7.x in Ubuntu (and definitely not replacing it!), but it seems to be already installed. However, in terminal I get 2.7.5 when I type 'python' and the online documentation says that it was not possible to break the reliance on python 2 for this ubuntu release. I was expecting to have to install it in a different directory, but if this has already been done then I could avoid messing with a critical bit of ubuntu.

Thanks for your help!