You have to download all python-files and install all modules from requirements.txt. Then you are ready to go.
signal-processing.py contains the functionality discussed in my thesis: Wilson's algorithm to sample spanning forests and thus representative vertices. It also provides the functionality of the signal processing and visualisation.
main.py provides you with some examples how you can use the implemented functions.
non_reversible_graphs.py, square_graph.py and as well example_graphs.py provide graphs on which you can apply the implemented functions.