Mailman 3 June 2023 - NumPy-Discussion

next NumPy triage meeting - now starting at 5 pm UTC
by Inessa Pawson March 17, 2024

March 17, 2024

The next NumPy triage meeting will be held this Wednesday, January 11th at 5 pm UTC. (Please note the new time!) This is a meeting where we synchronously triage prioritized PRs and issues. Join us via Zoom: https://numfocus-org.zoom.us/j/82096749952?pwd=MW9oUmtKQ1c3a2gydGk1RTdYUUVX… Everyone is welcome to attend and contribute to a conversation. Please notify us of issues or PRs that you’d like to have reviewed by adding a GitHub link to them in the meeting agenda: https://hackmd.io/68i_JvOYQfy9ERiHgXMPvg. -- Cheers, Inessa Inessa Pawson Contributor Experience Lead | NumPy https://numpy.org/ GitHub: inessapawson

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next NumPy Newcomers' Hour - 12 pm UTC
by Inessa Pawson Oct. 31, 2023

Oct. 31, 2023

Our next Newcomers' Hour will be held tomorrow, December 1st, at 12 pm UTC. Stop by to ask questions or just to say hi. To add to the meeting agenda the topics you’d like to discuss, follow the link: https://hackmd.io/3f3otyyuTte3FU9y3QzsLg?both Join the meeting via Zoom: https://us06web.zoom.us/j/82563808729?pwd=ZFU3Z2dMcXBGb05YemRsaGE1OW5nQT09 -- Cheers, Inessa Inessa Pawson Contributor Experience Lead | NumPy https://numpy.org/ GitHub: inessapawson

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next NumPy community meeting
by Inessa Pawson Oct. 22, 2023

Oct. 22, 2023

The next NumPy community meeting will be held this Wednesday, August 17th at 18:00 (6 pm) UTC. Join us via Zoom: https://us06web.zoom.us/j/83278611437?pwd=ekhoLzlHRjdWc0NOY2FQM0NPemdkZz09 Everyone is welcome and encouraged to attend. To add to the meeting agenda the topics you’d like to discuss, follow the link: https://hackmd.io/76o-IxCjQX2mOXO_wwkcpg?both For the notes from the previous meeting, visit: https://github.com/numpy/archive/blob/main/community_meetings/community-202… Cheers, Inessa Inessa Pawson Contributor Experience Lead | NumPy https://numpy.org/ Twitter: @inessapawson

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Next Documentation team meeting
by Mukulika Pahari Sept. 11, 2023

Sept. 11, 2023

Hi all! Our next Documentation Team meeting will happen on *Monday, June 5* at ***4PM UTC***. We now alternate the meeting times to be a bit more inclusive. This means that we'll have a meeting at 12pm UTC every 28 days, and a meeting at 4pm UTC every 28 days. All are welcome - you don't need to already be a contributor to join. If you have questions or are curious about what we're doing, we'll be happy to meet you! If you wish to join on Zoom, use this (updated) link: https://numfocus-org.zoom.us/j/85016474448?pwd=TWEvaWJ1SklyVEpwNXUrcHV1YmFJQ... Here's the permanent hackmd document with the meeting notes (still being updated): https://hackmd.io/oB_boakvRqKR-_2jRV-Qjg Hope to see you around! * You can also visit https://scientific-python.org/calendars to add the NumPy community calendar as an .ics file to your preferred calendar manager. * Best wishes, Mukulika

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reminder: put an upper bound on setuptools if you use numpy.distutils!
by Ralf Gommers Aug. 31, 2023

Aug. 31, 2023

Hi all, After setuptools 65.0 was released a few days ago, all users of numpy.distutils had their builds broken. This is already fixed in setuptools 65.0.2 because the breakage was particularly bad. However, the next breakage may not be fixed anymore (and more breakages *are* expected). So this is a good time to remind you all that you should put an upper bound on the setuptools version you allow in the releases of your package - to the last version that is known to work with your package. Our official stance here is that setuptools versions >=60 are not supported - see the "deprecating numpy.distutils" thread: https://mail.python.org/archives/list/numpy-discussion@python.org/message/P…. Newer versions may work for you, depending on what features you use. They don't for NumPy and for SciPy; both projects pin to 59.X to avoid problems. For the recent issue with setuptools 65.0.0, see https://github.com/numpy/numpy/issues/22135. We have also made the warnings about this topic in our docs more explicit, see https://github.com/numpy/numpy/pull/22154. Cheers, Ralf

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Adding bit_count ufunc
by Doug Turnbull Aug. 13, 2023

Aug. 13, 2023

👋Long time numpy user, and big fan of all your work TL; DR - there's a `bit_count` method on numpy scalars, and Python ints, I'm advocating for a `ufunc` `bit_count` as has been implemented in this PR: https://github.com/numpy/numpy/pull/21429 A number of people have requested this as a numpy feature and there's a lot of great discussion at this issue https://github.com/numpy/numpy/issues/16325 A bit count comes up in certain similarity situations (like hamming distance). This involves an xor with numpy arrays and a bit count, where the bit count is currently the bottleneck by a few orders of magnitude in my local benchmarking. Currently there's a number of not particularly fast, workarounds for doing this with numpy arrays, like the bit-twiddling solutions here https://stackoverflow.com/a/68943135/8123 https://stackoverflow.com/a/109025/8123 So I'd love to be able to continue the work of bit_count -> numpy array ufunc to get performance gains at the array level 🙏

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mixed mode arithmetic
by Neal Becker July 11, 2023

July 11, 2023

I've been browsing the numpy source. I'm wondering about mixed-mode arithmetic on arrays. I believe the way numpy handles this is that it never does mixed arithmetic, but instead converts arrays to a common type. Arguably, that might be efficient for a mix of say, double and float. Maybe not. But for a mix of complex and a scalar type (say, CDouble * Double), it's clearly suboptimal in efficiency. So, do I understand this correctly? If so, is that something we should improve?

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mean_std function returning both mean and std
by Ronald van Elburg July 6, 2023

July 6, 2023

I created a solution for ENH: Computing std/var and mean at the same time, issue #23741. The solution can be found here: https://github.com/soundappraisal/numpy/tree/stdmean-dev-001 I still need to add tests and the solution does touch the implementation of var. But before starting a pull request I like to check whether mean_std is a welcome addition. Also I was struggling with the internally needed format of the arrays containing mean and std and the format produced as a result. Which makes me uncertain whether the chosen solution is correct for all cases.

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ANN: SciPy 1.11.1
by Tyler Reddy June 28, 2023

June 28, 2023

Hi all, On behalf of the SciPy development team, I'm pleased to announce the release of SciPy 1.11.1, which addresses a few bugs and in particular a licensing issue discovered shortly after the release of 1.11.0, which has now been yanked from PyPI. Sources and binary wheels can be found at: https://pypi.org/project/scipy/ and at: https://github.com/scipy/scipy/releases/tag/v1.11.1 One of a few ways to install this release with pip: pip install scipy==1.11.1 ====================== SciPy 1.11.1 Release Notes ====================== SciPy 1.11.1 is a bug-fix release with no new features compared to 1.11.0. In particular, a licensing issue discovered after the release of 1.11.0 has been addressed. Authors ======= * Name (commits) * h-vetinari (1) * Robert Kern (1) * Ilhan Polat (4) * Tyler Reddy (8) A total of 4 people contributed to this release. People with a "+" by their names contributed a patch for the first time. This list of names is automatically generated, and may not be fully complete. Issues closed for 1.11.1 -------------------------------- * `#18739 <https://github.com/scipy/scipy/issues/18739>`__: BUG: run method of scipy.odr.ODR class fails when delta0 parameter... * `#18751 <https://github.com/scipy/scipy/issues/18751>`__: BUG: segfault in \`scipy.linalg.lu\` on x86_64 windows and macos... * `#18753 <https://github.com/scipy/scipy/issues/18753>`__: BUG: factorial return type inconsistent for 0-dim arrays * `#18759 <https://github.com/scipy/scipy/issues/18759>`__: determinant of a 1x1 matrix returns an array, not a scalar * `#18765 <https://github.com/scipy/scipy/issues/18765>`__: Licensing concern Pull requests for 1.11.1 -------------------------------- * `#18741 <https://github.com/scipy/scipy/pull/18741>`__: BUG: Fix work array construction for various weight shapes. * `#18747 <https://github.com/scipy/scipy/pull/18747>`__: REL, MAINT: prep for 1.11.1 * `#18754 <https://github.com/scipy/scipy/pull/18754>`__: BUG: fix handling for \`factorial(..., 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Example gufuncs
by Stefan van der Walt June 28, 2023

June 28, 2023

Hi all, To teach gufuncs, we used to rely on the example implementations in `numpy.core.umath_tests`. That module has since been deprecated. Is there another, more suitable location for such examples? I know it's been on SciPy's roadmap to convert some of `sp.linalg` to gufuncs, but that hasn't yet happened. Stéfan

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