Mailman 3 July 2018 - Matplotlib-devel

devel list membership
by Thomas Caswell July 26, 2018

July 26, 2018

Folks, This is cross-posted with (private) github channels. We need a reliable channel to communicate with every one who has a commit bit. Using github likely works (and has the advantage of keeping it's self in sync!), however there does not seem to be a way to have it be public to the world. To that end I propose that if you have commit rights you must also be a member of matplotlib-devel(a)python.org. Thoughts? Tom -- Thomas Caswell tcaswell(a)gmail.com

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Weekly dev meeting
by Thomas Caswell July 26, 2018

July 26, 2018

Folks, Semi-regular reminder than we have weekly ~hour long dev calls Mondays at 3PM EDT (1900 UTC), all are welcome. The weekly agenda and notes are at https://paper.dropbox.com/doc/Matplotlib-meeting-agenda--AIjYEukjsgPCLSQaxQ… We are going to try moving the call from where it is currently hosted to a meeting on NumFOCUS's gsuite. I have invited the current invitation list (filtered by recent attendance) to the new meeting. The link to join the meeting is: https://meet.google.com/rfx-hein-psp I am 50/50 on the new link working as expected / hitch free. If you plan to join, keep an eye on this mailing list / gitter for if we are moving back to the current meeting location for the call. Tom -- Thomas Caswell tcaswell(a)gmail.com

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mplcairo 0.1 release
by Antony Lee July 23, 2018

July 23, 2018

Dear all, I am pleased to announce the release of mplcairo 0.1 # Description mplcairo is a Matplotlib backend based on the well-known cairo library, supporting output to both raster (including interactively) and vector formats. In other words, it provides the functionality of Matplotlib's {,qt5,gtk3,wx,tk,macos}{agg,cairo}, pdf, ps, and svg backends. Per Matplotlib's standard API, the backend can be selected by calling matplotlib.use("module://mplcairo.qt") or setting your MPLBACKEND environment variable to `module://mplcairo.qt` for Qt5, and similarly for other toolkits. The source tarball, and Py3.6 manylinux and Windows wheels, are available on PyPI (I am looking for help to generate the OSX wheels). See the README for more details. # Why a new backend? Compared to Matplotlib's builtin Agg and cairo backends, mplcairo presents the following features: - Improved accuracy (e.g., with marker positioning, quad meshes, and text kerning). - Support for a wider variety of font formats, such as otf and pfb, for vector (PDF, PS, SVG) backends (Matplotlib's Agg backend also supports such fonts). - Optional support for complex text layout (right-to-left languages, etc.) using Raqm. **Note** that Raqm depends on Fribidi, which is licensed under the LGPLv2.1+. - Support for embedding URLs in PDF (but not SVG) output (requires cairo≥1.15.4). - Support for multi-page output both for PDF and PS (Matplotlib only supports multi-page PDF). - Support for custom blend modes (see `examples/operators.py`). See the README for more details. # Changelog from mplcairo 0.1a1 to mplcairo 0.1 - Integration with libraqm now occurs via dlopen() rather than being selected at compile-time. - Various rendering and performance improvements. - On Travis, we now run Matplotlib's test suite with mplcairo patching the default Agg renderer. Enjoy, Antony Lee

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Officially passing the baton to Thomas Caswell
by Michael Droettboom July 13, 2018

July 13, 2018

All, This e-mail is just to announce and make explicit what has already been the case in reality for quite some time (since at least summer of 2016): that the leadership of the matplotlib project is in the very capable hands of Thomas Caswell. His ability to manage such a high velocity of issues and pull requests is beyond astonishing, and he's brought the project forward in ways that seemed remote when my involvement tapered off. Thomas remains a pleasure and inspiration to work with and I know John would be proud of how is creation is being shepherded. As part of formalizing this, there is a pull request to bring the matplotlib governance document draft into effect here: https://github.com/matplotlib/governance/pull/3 Best of luck, and keep up the good work, everyone! Michael Droettboom

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Travis is hosed?
by Eric Firing July 10, 2018

July 10, 2018

I'm getting a flood of "glyph" warnings, and an odd failure at the bottom of the log. What's going on? Example, from a PR that is passing on Appveyer: https://travis-ci.org/matplotlib/matplotlib/jobs/402005933 Eric

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Windows wheels for Python 3.7?
by Matthew Brett July 9, 2018

July 9, 2018

Hi, What is the current procedure for generating Windows wheels? As y'all probably know, Python 3.7 came out a few days ago, and we really need to get a 3.7 wheel out ASAP to help other projects that depend on Matplotlib. I have done / am doing this for Linux / macOS - but what should happen next to get wheels for Windows? Cheers, Matthew

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moving tutorial to matplotlib org
by Thomas Caswell July 9, 2018

July 9, 2018

Folks, Any protests to moving https://github.com/tacaswell/interactive_mpl_tutorial into the Matplotlib org (and renaming 'interactive_tutorial')? I have now presented a version of this 3 times and it seems well received. Another option would be to move all of that content directly into the docs (but is obviously a lot more work!). Tom

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MPL 3.0 feature freeze
by Thomas Caswell July 8, 2018

July 8, 2018

Folks, I propose a feature-freeze for Matplotlib for tomorrow (sorry for the poor planning / communication). Open PRs which are not bug fixes and not marked as critical will be moved to the 3.1 milestone tomorrow (Sunday July 8, 2018). Goal is to finish up the RC in time for the scipy sprints next week. Any protests? Tom

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Cairo backends and OpenGL use
by Francesco Faccenda July 6, 2018

July 6, 2018

Dear all, I am writing to you because of an issue regarding the use of OpenGL in cairo backends from matplotlib. As I set a cairo backend with the instruction matplotlib.Use(“WXCairo”), there is evidence that the graphic computation is not being carried out by the graphic card. Since the significative amount of plotted data, the chart are heavy and slow when the user is interacting with them, so a graphic acceleration would be really appreciated. As a side note, I am embedding matplotlib canvas on wxPython stages, that’s why I choose WXCairo as backend, at first. However, setting other backends (GTKCario, TKCairo, Qt4Cairo, Qt5Cairo etc) while still using wx, still provides a working code without any errors, even if the graphic card is still not exploited. Is this an actual malfunction or am I missing something? What should I do to run matplotlib graphic computation on a graphic card? Thank you in advance. Best regards, Francesco Faccenda

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Travis failure related to qt
by Eric Firing July 2, 2018

July 2, 2018

Does anyone understand why Travis is failing? https://github.com/matplotlib/matplotlib/pull/11412 Thanks. Eric

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