Now it's time for your homework assignment. Your mission, should you choose to accept it, is to dive into this code and try to make the quality of our similarities better. It's really a subjective task; the objective here is to get you to roll up your sleeves, dive in, and start messing with this code to make sure that you understand it. You can modify it and get some tangible results out of your changes. Let me give you some pointers and some tips on what you might want to try here and we'll set you loose.

We used a very naive algorithm to find similar movies in the previous section with a cosine similarity metric. The results, as we saw, weren't that bad, but maybe they could be better. There are ways to actually measure the quality of a recommendation or similarity, but without getting it into that, just dive in there, try some different ideas and see what effect it has, and maybe they qualitatively will look better to you. At the end...