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fairness-in-cold-start-recommendation's Issues

Unable to run either model due to SciPy sparse matrix errors

Hello, I was trying to run the Gen and Scale variants of the model, but I kept getting the following error due to the evaluation portion of the code:

  File "main.py", line 239, in <module>
    main()
  File "main.py", line 126, in main
    recall_k=recall_at, eval_data=cold_test_eval, R=R)
  File "/<path>/Fairness-in-Cold-Start-Recommendation/Scale/utils.py", line 98, in batch_eval_recall
    z = y.multiply(x)
  File "/<path>/anaconda2/envs/fairness_recs_tf1/lib/python3.6/site-packages/scipy/sparse/base.py", line 336, in multiply
    return self.tocsr().multiply(other)
  File "/home/athtrch/anaconda2/envs/fairness_recs_tf1/lib/python3.6/site-packages/scipy/sparse/compressed.py", line 373, in multiply
    other = self.__class__(other)
  File "/<path>/anaconda2/envs/fairness_recs_tf1/lib/python3.6/site-packages/scipy/sparse/compressed.py", line 34, in __init__
    arg1 = arg1.asformat(self.format)
  File "/<path>/anaconda2/envs/fairness_recs_tf1/lib/python3.6/site-packages/scipy/sparse/base.py", line 322, in asformat
    return convert_method(copy=copy)
  File "/<path>/anaconda2/envs/fairness_recs_tf1/lib/python3.6/site-packages/scipy/sparse/lil.py", line 462, in tocsr
    _csparsetools.lil_get_lengths(self.rows, indptr[1:])
  File "_csparsetools.pyx", line 109, in scipy.sparse._csparsetools.lil_get_lengths

I presume the error occurs due to the following lines (90-96) in utils.py under batch_eval_recall:

preds_k = preds_all[:, :at_k]
at_k = preds_k.shape[1]
y = eval_data.R_test_inf

x = scipy.sparse.lil_matrix(y.shape)
x.rows = preds_k
x.data = np.ones_like(preds_k)

Where data from a smaller matrix is assigned to a bigger one. This causes the multiply to fail since perhaps the data is stored in a different layout under LIL matrices. Would you be able to provide the SciPy version for your code since I'm having trouble getting it to work?

Thank you.

paper files

find no paper searching by google, any link to the paper

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