/models:

song_as_sea_urchin.py and song_as_spider_web: output one song feature giving track_id (test version using data/spotify2019.csv and output fig in same folder)

cluster_visualize.py: output 2D cluster plot and 3D interactive cluster plot (fig saved in data folder)

knn.py: containing kmean base model and kNearestNeighbor model. Training test data are derived from data/spotify2019.csv dataset