SVD++

Result

$ python main.py
    iid  rating  uid
0     1       0    1
1     2       4    1
2     3       0    1
3     4       3    1
4     5       0    1
5     1       4    2
6     2       0    2
7     3       4    2
8     4       0    2
9     5       1    2
10    1       5    3
11    2       2    3
12    3       0    3
13    4       3    3
14    5       0    3

Pred-Score:
    iid    rating  uid
0     1  2.090715    1
1     2  4.000000    1
2     3  1.280850    1
3     4  3.000000    1
4     5  1.000000    1
5     1  4.000000    2
6     2  1.723971    2
7     3  4.000000    2
8     4  1.814075    2
9     5  1.000000    2
10    1  5.000000    3
11    2  2.000000    3
12    3  1.678504    3
13    4  3.000000    3
14    5  1.078177    3
Top item for user[3] => 3 with predicted rating 3