gistfile1.txt

$ export PYTHONPATH=/this/is/a/fake/directory
$ ipython
iPython 2.7.6 (default, Jan 23 2014, 21:14:10)
Type "copyright", "credits" or "license" for more information.

IPython 2.0.0-dev -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: import sys; sys.path
Out[1]:
['',
 '/usr/local/bin',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip-1.4.1-py2.7.egg',
 '/Users/goldbaum/Documents/ipython',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mock-1.0.1-py2.7.egg',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/readline-6.2.4.1-py2.7-macosx-10.9-x86_64.egg',
 '/Users/goldbaum/Documents/xdress',
 '/Users/goldbaum/Documents/galaxy_analysis',
 '/Users/goldbaum/Documents/runipy',
 '/Users/goldbaum/Documents/astropy',
 '/Users/goldbaum/Documents/yt-hg',
----> '/this/is/a/fake/directory',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',
 '/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages',
 '/Library/Python/2.7/site-packages',
 '/Users/goldbaum/Documents/ipython/IPython/extensions',
 '/Users/goldbaum/.ipython']