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this question was already asked here. However, that was 10 years ago; I'd like to bring it back, to see if there are new ways to store/retrieve/work with a 3D sparse matrix.

I know scipy.sparse still doesn't support 3D matrices, but maybe some other library/tool does it.

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  • That question may be 10 years old, but some of the answers are much newer. Commented Feb 13, 2021 at 1:42
  • you're correct. Sorry for not checking carefully. Commented Feb 13, 2021 at 5:40
  • 1
    sparse.pydata.org/en/stable Commented Feb 14, 2021 at 23:00
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