I'm surprised no one has asked for this before. But 3D Equalizer seems to support Python as of release 3DE4 R3b4. It's very popular as a high end tracking solution and personally I work with a matchmover who uses it. And I'd like to integrate his workflow, just like the rest of the packages. I know it runs as an X11 application, so I can image that that might pose some problems, or not. It would be great if you could look into this.
3D Equalizer Engine