I've written a mid-level library of functions I always use to quickly get and plot data from nds2 in python 3.  It's called nds2utils.  

If you'd like to use it and provide feedback, I'd welcome it at https://git.ligo.org/craig-cahillane/nds2utils.  There are 11 examples.

It's on PyPi, so you can pip install it in your favorite virtual environment.

pip install nds2utils