Want to display anatomical angles on screen

I want Python code to display angles on each screen. Means I want the change in angles while rotating the 3D view should be displayed on screen itself.

We will soon release a full-blown cathlab simulator (not just angle display but DRR generation, etc). Until then you can find a script that prints anatomical angles (RAO/LAO, CRA/CAU) in the corner of a 3D view in this post. There is also an ongoing discussion related to this here.