Mailman 3 January 2021 - Python-announce-list

ANN: Image Processing with Python Kickstarter
by Mike Driscoll Jan. 5, 2021

Jan. 5, 2021

Hi! I've been busily working on a new book on image processing with Python that uses the Pillow package. Pillow is the friendly fork of the Python Imaging Library and is one of the most popular Python image processing tools. If you'd like to learn more, you can check out my Kickstarter: https://www.kickstarter.com/projects/driscollis/image-processing-with-python Here are some of the topics that the book will cover: - Accessing image metadata - Working with image colors - Opening / viewing images with Python - Applying filters to images - Cropping, rotating, and resizing photos - Enhancing photos with Python - Combining images - and more! Thanks, Mike

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[RELEASE] Python 3.10.0a4 is now available
by Pablo Galindo Salgado Jan. 4, 2021

Jan. 4, 2021

Happy new year to all of you. I hope you all have a great start of the year! And how to best celebrate that we have left 2020 behind that with a new Python alpha release? :) Go get it here: https://www.python.org/downloads/release/python-3100a4/ *Major new features of the 3.10 series, compared to 3.9* Python 3.10 is still in development. This releasee, 3.10.0a4 is the second of six planned alpha releases. Alpha releases are intended to make it easier to test the current state of new features and bug fixes and to test the release process. During the alpha phase, features may be added up until the start of the beta phase (2021-05-03) and, if necessary, may be modified or deleted up until the release candidate phase (2021-10-04). Please keep in mind that this is a preview release and its use is not recommended for production environments. Many new features for Python 3.10 are still being planned and written. Among the new major new features and changes so far: * PEP 623 – Remove wstr from Unicode * PEP 604 – Allow writing union types as X | Y * PEP 612 – Parameter Specification Variables * PEP 626 – Precise line numbers for debugging and other tools. * bpo-38605: from __future__ import annotations (PEP 563) is now the default. * PEP 618 – Add Optional Length-Checking To zip. (Hey, fellow core developer, if a feature you find important is missing from this list, let me know.) The next pre-release of Python 3.10 will be 3.10.0a5, currently scheduled for 2021-02-01. *And now for something completely different* The Majumdar–Papapetrou spacetime <https://en.wikipedia.org/wiki/Sudhansu_Datta_Majumdar#Majumdar%E2%80%93Papa…> is one surprising solution of the coupled Einstein-Maxwell equations that describe a cluster of static charged black holes with the gravitational and the electrostatic forces cancelling each other out. Each one of these many black holes of the multi-black holes system has a spherical topology and follows the Reissner–Nordström metric <https://en.wikipedia.org/wiki/Reissner%E2%80%93Nordstr%C3%B6m_metric>. Unsurprisingly, the movement of a test particle in such spacetime is not only a very chaotic system but also has some fractals <https://arxiv.org/abs/gr-qc/9502014> hiding the complexity of its movement. Regards from cold London, Pablo Galindo Salgado

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[ANN] Datatest 0.11.1 Released
by Shawn Brown Jan. 4, 2021

Jan. 4, 2021

I'm pleased to announce version 0.11.1 of Datatest: Test driven data-wrangling and data validation. Test driven data-wrangling is a process for taking data from a source of unverified quality or format and producing a verified, well-formatted dataset. It repurposes software testing practices for data preparation and quality assurance projects. * GitHub: https://github.com/shawnbrown/datatest * PyPI: https://pypi.org/project/datatest/ * Docs: https://datatest.readthedocs.io/en/stable/ This is a bug-fix release and should be a drop-in replacement for 0.11.0. Changes include: * Fixed validation, predicate, and difference handling of non-comparable objects. * Fixed bug in normalization of queries from `squint` package. * Changed failure output to improve error reporting with `pandas` accessors. * Changed predicate failure message to quote code objects using backticks.

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