Scribe, which is another project open sourced by Facebook, depends on fb303 which is hidden away in the contrib directory of Thrift. If the fb303 library could be uploaded to PyPI along with the thrift library, it would be a lot easier to build and install Scribe. This might also be relevant to do for all languages that distribute libraries used by generated code, not just Python.
As far as I understand it, the fb303 library defines a useful API for long running services in general, so if it was distributed better, it might get a decent user base over time.
Yes, it seems silly that the Thrift project should maintain and distribute a library mostly (only?) used by a different, completely independent, project, but that's how Facebook decided to do it when they open sourced these things...