Indexing scipy.csr_matrix with numpy.ndarray not supported in scipy==1.3.1

[mski-iksm]

matrix[user_indices, item_indices] in graph_convolutional_matrix_completion.py L.404 returns error in scipy==1.3.1, since indexing with numpy.ndarray is not possible.

Possible Solution

• matrix[len(user_indices), len(item_indices)]
  or
• specific scipy version as scipy==1.2.1 at redshells/setup.py