First of all, you have to install python3.3 on your platform. In Ubuntu 12.10, I use apt-get to install python3.3. (By default it comes with python3.2, which does not have built-in virtual env support)

Then you’ll need to create a virtualenv and activate it. For details see

the python doc

Since I want to install packages using pip, I proceed to install distribute.

http://python-distribute.org/distribute_setup.py