there is a way - i don’t have a kinect here to test it and you have to use tscript instead of python:
kinecttilt -d degrees nodes
Controls the tilt of the Kinect sensor selected by the specified nodes. The tilt is expressed in degrees and is relative to gravity. That means that a tilt of 0 is horizontal to the ground, not horizontal to the surface the sensor is sitting on (which may not be flat). The Kinect sensor tilt motor is not intended to be used for continuous motion and will start ignoring commands for a while if asked to move too much (more than 15 times in 20 seconds usually).
- -d The degrees of tilt to set to the sensor(s) to. A negative number will aim it downwards.