def test_rmse_from_dictionary_3 (self) :
list1 = {}
list2 = {}
self.assertEqual(0, netflix_rmse_from_dictionary(list1, list2))
def test_rmse_from_dictionary_2 (self) :
list1 = {1 : (2, 3, 4), 2 : (2, 3, 4)}
list2 = {1 : (2, 3, 4), 2 : (2, 3, 4)}
self.assertEqual(0, netflix_rmse_from_dictionary(list1, list2))
