Mailman 3 July 2019 - NumPy-Discussion

Developer Meeting @SciPy Conference, Friday 1pm
by Sebastian Berg July 12, 2019

July 12, 2019

Hi all, we have reserved a room for a Developer meeting at SciPy. The meeting is planned for Friday at 1pm in room 108. I have created a tentative Agenda with some broad discussion points at: https://hackmd.io/rg0DI0JASKeZ_G5bTJ3YSA Please feel free to edit or add the Agenda. All the Best, Sebastian

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float16 but no complex32?
by Neal Becker July 11, 2019

July 11, 2019

I see a float16 dtype but not complex32. Is this an oversight? Thanks, Neal -- Those who don't understand recursion are doomed to repeat it

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Adding a "suffle=True" kwarg to numpy.random.Generator.choice
by Matti Picus July 10, 2019

July 10, 2019

In PR https://github.com/numpy/numpy/pull/13812, Thrasibule rewrote the algorithm used with a faster alternative branch for some cases. The faster algorithm does not necessarily shuffle the results, so for instance gen.choice(2000, 2000, replace=False) may simply return arange(2000). In the old code the result is always shuffled. We propose adding a new kwarg "shuffle" that defaults to True. Users looking for maximum performance may choose to use shuffle=False. Since this is a behavioral change (although only in the new Generator class, the new code will not be used in RandomState), we are proposing it to the mailing list Any thoughts? Matti

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No Community Meeting this Week
by Sebastian Berg July 8, 2019

July 8, 2019

Hi all, due to the SciPy conference we will _not_ have a Community meeting this week. We will have a developer meeting at the SciPy conference on Friday at 1pm in room 108 and take part in the Sprints. I will send a tentative Agenda/things to discuss in a separate email. Best, Sebastian

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Regarding adding new function in Numpy
by ANURAG ANURAG July 8, 2019

July 8, 2019

Sir, I was recently converting some Matlab codes into python, where I recently stumble upon bitget(n,x) function of Matlab, b = bitget(A,bit) returns the bit value at the position bit in integer array A. I was unable to find any Numpy equivalent of this, so should I create a pull request in Numpy for the same! Regards, Anurag

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Shippable builds are broken - I filed an issue with them
by Matti Picus July 4, 2019

July 4, 2019

For the past few days shippable (arm builds) CI has been failing. I opened an issue with them https://github.com/Shippable/support/issues/4882

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uarray update: API changes, overhead and comparison to __array_function__
by Hameer Abbasi July 3, 2019

July 3, 2019

Hello all, I just wrote a blog post on uarray and how it compares against NumPy’s __array_function__ protocol. Give it a read here: https://labs.quansight.org/blog/2019/07/uarray-update-api-changes-overhead-… Best Regards, Hameer Abbasi

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Problem with absolute value
by Nicolas Rougier July 3, 2019

July 3, 2019

Hi, I’m a bit surprised with the following code: >>> import numpy as np >>> np.seterr(all='warn') >>> Z = np.array([-128], dtype=np.byte) >>> print(np.abs(Z)) [-128] Obviously, it does not return the absolute value and I get no warning. Is it something expected ? (numpy 1.16.4, python 3.7.3) Nicolas

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Top level release index page
by Matti Picus July 3, 2019

July 3, 2019

In PR 13886 I reworked the way the link to the release notes is generated. The current page is http://www.numpy.org/devdocs/release.html and the new page is https://8001-908607-gh.circle-artifacts.com/0/home/circleci/repo/doc/build/… I don't like the "wall of text" in the current page. On the other hand, it is nice to use CTRL-F to search the page itself for answers to questions like "what release deprecated indexing by float", which is why I left the level-of-detail at 3 (1 - release, 2 - sections, 3 - item header). Should the level-of-detail be reduced to only single links to the release document? An alternative would be to render the contents as a collapsible list, which would require some javascript. Matti

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NumPy Community Meeting Wednesday, July 3
by Sebastian Berg July 2, 2019

July 2, 2019

Hi all, There will be a NumPy Community meeting Wednesday July 3 at 11 am Pacific Time. Everyone is invited to join in and edit the work-in- progress meeting notes: https://hackmd.io/76o-IxCjQX2mOXO_wwkcpg Best wishes Sebastian _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion(a)python.org https://mail.python.org/mailman/listinfo/numpy-discussion

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ANN: SfePy 2019.2
by Robert Cimrman July 2, 2019

July 2, 2019

I am pleased to announce release 2019.2 of SfePy. Description ----------- SfePy (simple finite elements in Python) is a software for solving systems of coupled partial differential equations by the finite element method or by the isogeometric analysis (limited support). It is distributed under the new BSD license. Home page: http://sfepy.org Mailing list: https://mail.python.org/mm3/mailman3/lists/sfepy.python.org/ Git (source) repository, issue tracker: https://github.com/sfepy/sfepy Highlights of this release -------------------------- - improved support for time-dependent homogenization problems, - Python 3.7 compatibility For full release notes see [1]. Cheers, Robert Cimrman [1] http://docs.sfepy.org/doc/release_notes.html#id1 --- Contributors to this release in alphabetical order: Robert Cimrman Jan Heczko Lubos Kejzlar Vladimir Lukes

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PyPI NumPy account changes
by Ralf Gommers July 1, 2019

July 1, 2019

Hi all, PyPI now has taken 2FA (two-factor authentication) in production, which is a useful security measure I think. Also, Tidelift is able to measure which accounts have 2FA enabled. I had a look at our PyPI account, and there were many owners of it. This isn't great from a security perspective. There are two roles on PyPI: maintainer, and owner. Maintainers can upload, owners can add other people and delete the whole account. The old PyPI added anyone as owner by default, that's why we had so many. I already did some cleanup, removing people who having uploaded a release in 8+ years and/or were never a NumPy maintainer. I propose to clean this up a little further. We don't need more than 3-4 owners (for enough redundancy), converting the rest to maintainer or removing them would be better. Ideally everyone would also enable 2FA. Given who now has access, I propose as owners Charles Harris, Matthew Brett and myself. The other people who have access are fairly unlikely to do another release in the near to medium future (or ever), except probably Matti. So I propose that I make them maintainers now, and then send them an email whether they want to keep access or not. Does that sound okay? Cheers, Ralf

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