8000 ENH: Adds an out argument to bincount. by jaimefrio · Pull Request #9424 · numpy/numpy · GitHub
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ENH: Adds an out argument to bincount. #9424

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ENH: Adds an out argument to bincount. #9424

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jaimefrio
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Fixes #9397.

@jaimefrio
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It's missing all the necessary extra tests and additional documentation, and it uses out=, which doesn't seem to be a crowd favorite. But the implementation is all done and seems to be working fine on some informal testing.

@jaimefrio jaimefrio mentioned this pull request Jul 14, 2017
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eric-wieser
eric-wieser reviewed Jul 14, 2017
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numpy/core/src/multiarray/compiled_base.c
}

lst = (PyArrayObject *)PyArray_ContiguousFromAny(list, NPY_INTP, 1, 1);
if (lst == NULL) {
list_arr = _array_from_object(list_obj, NPY_INTP, 0);
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Why is the output type intp? That seems somewhat arbitrary, and it would seem more sensible to respect the type of the out argument

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Hmm... Perhaps we could mix in here some of the ideas in #7464, which I apparently abandoned for no good reason. Will give it some thought.

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I expect the biggest problem was what do about backcompat.

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For this PR, isn't it fine to keep the list integer?

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charris commented Jul 15, 2017

Test failure looks legitimate.

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charris commented Jul 18, 2017

Couple of compiler warnings to deal with.

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mhvk commented Dec 22, 2018

This is still a nice idea. I'm not quite sure what got it stuck...

To get around the weirdness of not initializing out, one could also introduce an initial argument (and, then, if initial is out, one has no initialization).

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Please fix this PR as it would be a useful addition.

Base automatically changed from master to main March 4, 2021 02:04
@InessaPawson InessaPawson added the 52 - Inactive Pending author response label Jun 8, 2022
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mattip commented Aug 10, 2022

Closing since it has not been touched for quite a while. This may be useful, if someone else wants to pick it up.

@mattip mattip closed this Aug 10, 2022
@mhvk mhvk mentioned this pull request Oct 23, 2022
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@arthurfeeney arthurfeeney mentioned this pull request Dec 31, 2022
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Feature request: Incremental bincount and axis argument
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@jaimefrio @charris @mhvk @GregoryMorse @mattip @seberg @eric-wieser @InessaPawson
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