[x] Add some documentation and explanation to the notebooks.
[x] Compute the ranking metrics, maybe compare your algo with other algos.
[x] In the interactions, you go from purchase 1, wish list 3, view 2, add to cart 0. Change the order so purchase is the strongest signal. From less to more: view, wish list, add to cart, purchase. Do not start with 0, start from 1, and if you want to can try different weights, for example, purchase 4 or 10.