Python3. Created to observe cross pollinating tracks across public Spotify playlists, for my own posterity. Shameless plug to my Spotify profile
Use a package manager such as pip to install spotipy, matplotlib, and numpy. For spotipy docs go to https://spotipy.readthedocs.io/en/latest/
Tracks show up on n playlists, with a score of 1 / n
Playlist individuality is sum of track score divided by number of tracks in the playlist. A score of 50 means avg of 2 playlists per track