[Numpy-discussion] Re: API: make numpy.lib._arraysetops.intersect1d work on multiple arrays #25688

For my own work, I required the intersect1d function to work on multiple arrays while returning the indices (using `return_indizes=True`). Consequently I changed the function in numpy and now I am seeking feedback from the community.

This is the corresponding PR: https://github.com/numpy/numpy/pull/25688

<snip> To me this looks like a very sensible generalization. In terms of numpy API, the only real change is that, effectively, the assume_unique and return_indices arguments become keyword-only, i.e., in the unlikely case that someone passed those as positional, a trivial backward-compatible change will fix it. -- Marten