APSG defines several new python classes to easily manage, analyze and visualize orientational structural geology data.
You can see APSG in action in accompanied Jupyter notebook http://nbviewer.jupyter.org/github/ondrolexa/apsg/blob/master/apsg_tutorial.ipynb
And for fun check how simply you can animate stereonets http://nbviewer.jupyter.org/github/ondrolexa/apsg/blob/master/animation_example.ipynb