Python module import failed error

[matt.doolittle33 at gmail.com]

Hello all; I am using Ubuntu 12.10 and Python v2.7.3.  I am trying to add a directory to the PYTHONPATH.  All of the commands I have found on the web have failed.  Please help me to add a directory to the PYHONPATH.  The file path is Home/home/bin.  Thanks in advance.