You may already be aware that the Python sparse ndarray implementation is being developed over at https://github.com/pydata/sparse.
It was a project started by Matthew Rocklin and now continued by Hameer Abbasi so they may have some valuable insights to add here. [ Full content available at: https://github.com/apache/arrow/pull/2546 ] This message was relayed via gitbox.apache.org for [email protected]
