Playing a take in realtime and then doing something on every frame with python?

[brian1_nc]

Ok, so I'm streaming some data into MB in realtime from a mocap system. There is an animation file already loaded in MB. I would like to hit play and then record the streaming data. But for starters, I just want to play the file and then print each frame number as it goes through the time bar in realtime. Framerate is 30 fps. So I know how to start play with python:

lPlayerControl = FBPlayerControl()
lPlayerControl.Play()

and I know how to get the current frame:

print FBSystem().LocalTime.GetTimeString()

but I'm not sure what to do next. I have tried a loop with no success. I know how to get the start and end frame in the timebar, but how do I print current frame numbers in realtime as the take is playing?

thanks,
Brian