Unknown:~ jake$ which python
/opt/local/bin/python
Unknown:~ jake$ whereis python

$ port select python
Available versions for python:
    none
    python25-apple
    python26-apple
    python27 (active)
    python27-apple
$ port select python27-apple
Warning: Unable to get active selected version: The specified group 'python27-apple' does not exist.
Error: The 'list' command failed: The specified group 'python27-apple' does not exist.

sudo port select python python27-apple