Hi, I have had a PR <https://github.com/numpy/numpy/pull/7177> open (first draft can be found here <https://github.com/numpy/numpy/pull/7138>) for quite some time now that adds an 'axis' parameter to *count_nonzero*. While the functionality is fully in-place, very robust, and actually higher-performing than the original *count_nonzero* function, the obstacle at this point is the implementation, as most of the functionality is now surfaced at the Python level instead of at the C level.
I have made several attempts to move the code into C to no avail and have not received much feedback from maintainers unfortunately to move this forward, so I'm opening this up to the mailing list to see what you guys think of the changes and whether or not it should be merged in as is or be tabled until a more C-friendly solution can be found. Thanks!
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