suitesparse

grblas tests raise this warning from scipy.sparse:

grblas/tests/test_io.py::test_matrix_to_from_networkx
  /home/erik/git/grblas/grblas/io.py:38: DeprecationWarning:

  The scipy.sparse array containers will be used instead of matrices
  in Networkx 3.0. Use `to_scipy_sparse_array` instead.
    ss = nx.convert_matrix.to_scipy_sparse_matrix(g)

This would be useful if you do not want to store the matrices in your home directory.