It's been quite a lot time by now that I have developed a tiny library to read files from the CMU MoCap lib. In case you are working with the .amc files you may find it useful.
I was inspired by the Matlab version of the interface, however, I have not implemented the writing back to .amc file functionality. At this version, you can only read the motion files. The examples should be self-declarative and comprehensive.
You can find or clone the library at:
http://bitbucket.org/gpierris/pycmu_mocap or git clone This email address is being protected from spambots. You need JavaScript enabled to view it.:gpierris/pycmu_mocap.git