Is there a python library to make calls to a postgres db in a startup script?

I found some documentation for import psycopg2 but when I try to include this in a startup python script on FME workbench 2014 sp2 it says that there is no module named psycopg2.  I am trying to read/write to a postgres db, more specifically i want to set a value based on a previous feature.  I believe that you cannot iterate features in a python caller.