If you're using the natively included python, pyobjc comes free.
As soon as I saw that mentioned in the documentation, I knew this project was going to have issues.
OS X has shipped with python for quite some time.
In addition, OS X python started including a build of pyobjc since OS X 10.5
You literally can fire up python from the terminal on OS X 10.5 and later and type: import Foundation and it will "just work".
No additional installs required.
If you're using the natively included python, pyobjc comes free.
As soon as I saw that mentioned in the documentation, I knew this project was going to have issues.