Selecting macports python as default in non-admin account

Selecting macports python as default in non-admin account

I have two accounts on my system, an admin account and a user account.
I use the admin account to install macport and have set the default python
using
sudo port select --set python python27
On the user account I can run all the python I need using
/opt/local/bin/python
but how do I select that to be default?
port select --list python
reports
python27 (active)
but
which python returns
/usr/bin/python