Possible bug in ComputeDCG(sorted_ranks)

[linzhu1967]

Hi~
Thanks for sharing the code and the documentation.
When I used your code to test the Duet model, I found that the function ComputeDCG(sorted_ranks) may have a bug on the computation of DCG ( this code: dcg += ((2^rating - 1)/math.log2(pos + 2)) ).
In python, ^ means XOR symbol instead of exponent symbol.

Kind Regards,
Linzhu