Python Language Problem:

Use Python

You will also provide other methods as described below to provide the recommendations of books to read for a given user a. (10 Points) Write a method calc similarity(user1, user2) which takes 2 user ids to find and return the similarity between all of the ratings of the two given users. This method is similar to the method used in the DNA assignment, as it compares the individual ratings from the two users to determine the overall similarity between two users. The similarity between two users is calculated by treating each of their ratings as a mathematical vector and calculating the dot product of these two vectors. (Remember that the dot product is just the sum of the products of each of the corresponding elements. See the example below.) For example, suppose we had 3 books and ratings as follo ws: Terry 5 3 1 Bob 5 1 5 The calculation for similarity between Terry and Bob will be: Terry and Bob: (5 x5) (3 x 1)+(1x 5) 25 35 33