export PYTHONPATH="/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/"
if it ask for the Foundation module.also check that your bluetooth is on and that you have replaced the last line (number 66) in setup.py like this:
os.system("xcodebuild install -arch 'x86_64' -target LightAquaBlue -configuration Release DSTROOT=/ INSTALL_PATH=/Library/Frameworks DEPLOYMENT_LOCATION=YES")
and last but not least check in _initblue.py (inside lightblue-0.4-master/src/mac) line 468 > replace with this one 'signature="v@:@iZ"' (double check it on goog)
you then run: 'sudo python setup.py install'
I have tried all these in 10.9 after many fails, but it then imported the module and found the bluetooth around me.good luck