Test Failed:
Testing  RecommenderEngine.averages() with input:
items = ['Tiger', 'Dog', 'Snake', 'Fireball']
ratings = {'Liam': [0, 0, 0, 0], 'Man-Lin': [0, 0, 0, 0], 'Jose': [0, 0, 0, 0]}


Second item of tuple {} in the list returned by RecommenderEngine.averages() is not a float. Found Item of type ('Tiger', 0)