Hi all, We have a pull request to add np.nancumsum and np.nancumprod: https://github.com/numpy/numpy/pull/7421 Seems pretty straightforward and uncontroversial to me, but our policy is to run new API by the mailing list, so speak up if you have some objection, or take a look at the PR if you have an interest in the detailed semantics. -n -- Nathaniel J. Smith -- https://vorpus.org