If you don't already have a reliable Python installation, and know how to wield it, I recommend downloading and installing Anaconda.

Get this repo with git or by downloading the ZIP file, and enter that directory.

Make and enter a virtual environment:

conda create -n seisplot python=3.4
source activate seisplot

Install some more dependencies:

conda install -c obspy obspy
conda install nose
conda install pyyaml

Edit config.yaml to meet your requirements.

Run the script from the command line, for example:

python seisplot.py </path/to/infile.segy> --config config.yaml --out /path/to/result.pdf