error #1
Description
ubgpu@ubgpu:~/github/recommender$ python EvaluateCFList.py cosign_weighted_sum data/TestSet01.csv
Reading and parsing the data into memory...
Technique: cosign_weighted_sum
userID, itemID, Actual_Rating, Predicted_rating, Delta_Rating
Method not supported... Exiting.
cosign_weighted_sum
MAE:
Traceback (most recent call last):
File "EvaluateCFList.py", line 32, in
print_evaluation(f, method, results)
File "/home/ubgpu/github/recommender/utils.py", line 51, in print_evaluation
print " MAE: ",f.mean_absolute_error(results)
File "/home/ubgpu/github/recommender/techniques.py", line 51, in mean_absolute_error
return sum([abs(x['predicted'] - x['actual']) for x in results])/len(results)
TypeError: 'NoneType' object is not iterable