I am one of the maintainers of Boto. A few weeks ago we began to merge backward-compatible Python 3.3 and 3.4 support into our develop branch. Most modules now support Python 3 with passing unit and integration tests, and I am hoping to do a release soon. I am reaching out to you to ask if you would test our develop branch with StarCluster.
Testing against Python 2.x will help to ensure that we don't accidentally break third party modules like StarCluster. If you would like, you may also try out the Python 3 support and let us know any feedback. More information about the Python 3 support can be found in this boto-users post:
I appreciate any time that you can put into helping the Boto project with this.
This request is part of boto/boto#2437
Support for Python 3 is now released in boto-2.32.0. Closing this issue.