['', '/usr/local/bin', '/home/keith/src/pytabix',
    '/home/keith/devel/onpythonpath', '/usr/lib/python2.7',
    '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk',
    '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload',
    '/usr/local/lib/python2.7/dist-packages']
How can I keep python from loading the 'wrong' package?