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Matplotlib Weekly Meeting

A regular sync meeting for the project's maintainers, which is open to the community. Everyone is welcome to attend and contribute to conversations.

February 22 2024 - Jan 09 2025

tags: 2024 dev call

Call co-ordinates: Thursdays @ 21:00 Berlin time (20:00 UTC during winter, 19:00 UTC during summer) https://zoom.us/j/384435716?pwd=WFpxVWxoYXArTDFzN1lWaHNoOE8xZz09

Previous notes: Meeting Agendas Archive: matplotlib/ProjectManagement

Needs discussion at some point

Medium sized projects

RSE worklog

2023-04-20 19:00:00+00:00
Europe/Berlin        2023-04-06 21:00:00+02:00
UTC                  2023-04-06 19:00:00+00:00
America/New_York     2023-04-06 15:00:00-04:00
America/Vancouver    2023-04-06 12:00:00-07:00
US/Hawaii            2023-04-06 09:00:00-10:00

Jan 9

attending: @greglucas, @efiring, @story645, @tacaswell, @rcomer, @ksunden, @efiring

Agenda

old business

  • 3.10 doc tweaks
  • NASA updates
  • RSE updates

new business

Notes

RSE updates

what big stuff is in the pipe?

  • bivariate colormap (has PR, needs review)
  • bezier work (from Bruno)
  • PR to vectorize 3D code
    • some have been resurected by Scott
  • font work! (raq)
  • groupbar chart
  • what artists get a label attribute
  • start to look at ticks

labels

  • to ideas:
    • want to have a unique id so you can select artist by name 2
      • sometimes people (ab)used the label API for this
    • label is top-level artist property to be used in legends even on things that should never be in the legend (like the Legend itself or the whole figure)

Dec 26

attending: @efiring, @tacaswell, @story645

old business

notes

  • request to prioritize Remote Frame Buffer

Dec 19

attending: @story645, @ksunden, @QuLogic

Old business

  • RSE updates

New business

Notes

  • Kyle : 3.10 release
  • Elliott : font internationalization

edge/hatch color

  • is edge intended as a color spec? 'inherit' can be passed in through color or rcParam
  • should transparent edgecolor be special cased when hatch is set and no hatchcolor is set

Dec 12

attending: @story645, @greglucas, @ksunden, @tacaswell, @QuLogic

Agenda

Old business

  • RSE updates

New business

  • 3.10
  • Data symlinks in wheels not working (Issue)

Notes

missing files

  • determined that the missing files is due to a change in meson-python between 0.16.0 and 0.17.0
  • will pin back and quickly cut a 3.9.4
  • will tag 3.10.0 as soon as this is done

RSE updates

  • Tom
    • not much, busy with other resonsibilities
  • Kyle
    • trying to sort out a series of "one more thing…" for 3.10
  • Elliott
    • trying to get back on top of reviews
    • work on font stuff
      • couple of nice-to-have before pulling bulk of raqm work in
      • type3 fonts in pdf can be nicer
        • characters out of ascii plane are rendered in the right place but as "xobject" not as text so highlighting is super broken
        • may be able to use a very custom code page that supports the first 256 glyphs as proper text
      • do we care about type3
        • its complicated
        • publishers may still care
      • maybe able to get ghostscript to do type1 -> type3 conversion

Dec 5

attending: @QuLogic, @ksunden, @story645, @NGWi

Agenda

Old business

  • RSE updates

New business

  • 3.10

Notes

  • xkcd
    • probably just an error on local fonts
  • transparent animation
  • Was reported as not a functioning fix in a comment on the PR
  • can't reproduce

November 21

attending: @tacaswell @efiring @ksunden @qulogic @story645

Agenda

Old business

  • RSE updates

New business

  • 3.10

Notes

RSE updates

  • Kyle
    • 3.10 finalizing PRs had more back-and-forth than expected
      • vert deprecation #29155
        • switch deprecation to "pending"
        • this will still fail pandas (because they have opted it to more warnings)
        • we will PR to fix pandas
      • converter relaxation #29154
        • merged to main
        • PR to 3.10.x pending
  • Elliott
  • Tom
    • some review, work on LLM rules

test determinism test

  • ghostscript does not promise determinism of output, so we can not test for it!
  • consider removing test (or atleast ps part)
  • stalled PR from @oscargus to remove distillation may be related

LLM chat

November 14

attending: @tacaswell @greglucas @ksunden @QWhXj01mSwmTjk5kN1H_qQ

Agenda

Old business

  • RSE updates

New business

  • 3.10.0rc1 fallout?

Notes

RSE updates

  • Kyle
    • data prototype work
      • thinking about collections
    • incompatibility with tcl9, working on finishing PR
  • Elliott
  • Thomas
    • behind the scenes NASA grant
    • bit of review and discussion with Kyle

3.10.0 final

Target this Friday

Timers

  • PR: https://github.com/matplotlib/matplotlib/pull/29062
  • What do we want to do for accuracy of timers on CI systems?
    • CI systems are troublesome with their timers. All tests pass locally.
    • Keep the current PR as-is and target 3.11, nothing urgent for 3.10.
    • Try to make longer tests with longer iterations to avoid issues with slow CI systems. (long running tests are currently ~25s)
      • Make sure to change time based on local vs CI

November 7

attending: @tacaswell, @efiring, @ksunden, @story645, @QuLogic

Agenda

Old business

  • RSE updates

New business

  • 3.10rc1 fallout?
  • sprint report

Notes

RSE updates

  • Kyle
    • rc 3.10 out (technically in October)
    • trying to focus on data-prototype work
  • Tom
    • grant work
    • pydata NYC sprints
    • bits of review/contributions
  • Elliott
    • 3.10rc1 testing (fedora build to futher build down stream)
    • Work on wasm build
      • need to skip subprocess / thread tests
      • they have a canvas backend that we might adopt
      • how does this intersect with jupyterlite?
        • we think they are using the canvas backend, need to talk to them
      • need to look into how to get nightly wheels for pyodide available if we want to use jupyterlite for our docs
      • we do have some cut-outs because we fully control our own server and can host what ever we need to
      • might need to tune "how to clean old wheels" script (shared problem)

rc1 fallout

  • none yet!

sprint report

  • got a few first-time contributors through

October 31

attending: @tacaswell, @QWhXj01mSwmTjk5kN1H_qQ, @QuLogic ,@ksunden, @story645 , @timhoffm

Agenda

Old business

  • RSE updates
  • 3.10 status update

New business

  • NF CoC

Notes

CoC

Conetxt

Email from NF

Dear Projects,

We are happy to announce that the NumFOCUS Board of Directors approved the new NumFOCUS Code of Conduct on Sept. 4, 2024. Before the Code of Conduct can be implemented, the NumFOCUS Code of Conduct Working Group must be established and receive training. We plan to complete this process by the end of January 2025.

Current: NumFOCUS Sponsored and Affiliated projects can opt-in to use the new Code of Conduct. Starting Feb. 1, 2025, all new NumFOCUS projects will be asked to opt-out of using the NumFOCUS CoC. NumFOCUS events, including PyData, will continue under the NumFOCUS Code of Conduct in place.

NumFOCUS Code of Conduct Working Group Election

We are looking for individuals willing to serve in the Working Group that will be tasked with reviewing, investigating, responding to, and advising on potential conduct violations and advising a broad NumFOCUS ecosystem member on the NumFOCUS Code of Conduct. The term is one year. Please find more information, as well as the nomination form, in this blog post.

Your Decision Process

For your project currently with NumFOCUS, the new CoC is opt-in. To support your project in making an informed decision, as well as help in the potential implementation, we are planning the following actions:

  1. Jan. 2025: Walk-through video + email + meetings for the Projects and PyData chapters
  2. Feb. 2025: Current Projects’ decisions to opt-in are captured via a Typeform submission
  3. Mar. 2025: Meeting with Project adopters to provide materials:
    • Welcome pack:
      • pre-drafted text that you can put on your website / GitHub README file
      • a link to our CoC information, which will include the reporting button infographic of the reporting procedures
    • Education:
      • online materials covering CoC-related best practice

Please let us know if you have any questions. Feel free to contact Kamila Stepniowska (Project DEI Lead) by email (kamila@numfocus.org) or via Slack.

Thank you,

Arliss

NF CoC: https://numfocus.org/2025-code-of-conduct Our current CoC: https://matplotlib.org/stable/project/code_of_conduct.html

Currently we use Contributor Covenent 2.0 verbatim, NF CoC is new text synthesised from a number of existing CoC including Contributor Covenent 1.4

Looks like we can not make a decision until Feb 25 and there will be more information / materials available to us in Jan 25

Discussion

Consensus is we are still interested.

RSE updates

  • Kyle
    • work on 3.10
    • rc1 TODAY
  • Elliott
    • sick this week
    • got thourgh animation work
      • all codecs could find work
    • polar PR position in layouts
    • starting to look at alt-text
    • CI audit
      • mostly done, still in progress sorting out where we skip which tests
        • mostly GUI toolkits
      • appveyor is the only one that runs with conda
      • azure is a multidue of windows
      • azure vs GHA have slightly different osx runners
      • freethreading only on GHA
  • Tom
    • 3.10 work
    • grant prep work

3.10

sprint prep

October 24

Agenda

Old business

  • RSE updates
  • 3.10 progress

New business

notes

RSE updates

  • Tom
    • behind the scenes paperwork for NASA grant
    • some review
  • Kyle:
    • macos input hook issues
    • 3.10 work
  • Elliott
    • 3.10 things
    • finished polar work (needs to be commited and PRd)
    • looking at transparent animation
      • ham-fisted compositing to white not great (Caswell added that)
      • adding cut-out for more formats that support it
    • need website reviewed to turn of pluto
      • Done!

3.10

October 17

attending:@efiring, @ksunden, @QuLogic,

agenda

old business

  • RSE

Notes

3.10

  • MacOS CI problem solved, but needs a backport.
  • Color pipeline: needs another rebase (Kyle).
  • Nothing else is blocking; a few more might get in.
  • goal: branch tomorrow or Monday
  • merge reference cycle fix? https://github.com/matplotlib/matplotlib/pull/28861

3.9.3

October 10

attending:@efiring, @ksunden, @QuLogic, @greglucas, @tacaswell, @story645

agenda

old business

Notes

COC

  • NF has released text, discuss in 3 weeks

3.10

RSE update

  • Elliott:
    • progress on website redirects
    • yesterday looked like we were getting hammered by AI bot
      • turned on cloudflare cdn for discourse
      • followed guide on how to do this, but report issues
    • enable bot-protection on CF, this broke inventory downloading for inter-sphinx, turned off

October 3

attending: @ksunden, @QuLogic, @efiring

Informal meeting with some discussion of PRs for 3.10.

3-D rotation PR: needs a decision, or delay to 3.11.

3.8 deprecation removals

https://github.com/matplotlib/matplotlib/pull/28658: Tim?

September 26th

attending: @ksunden, @QuLogic, @efiring, @story645, @timhoffm

Agenda

old buisness

  • RSE

new business

  • hannah hacktoberfest?

Notes

hacktoberfest

  • Evaluation is neutral; hard to evaluate long-term value. There is some willingness, but no enthusiasm.
    • we're too under-resourced at the moment
  • take out topic
  • they can request a hacktoberfest-accepeted tag

removal of cbook.Stack

  • this was deprecated in 3.8, and the linked PR removes it for 3.10
  • however, there exists a usage of it in the type stubs for lib/matplotlib/backend_tools.pyi:ToolViewsPositions (but is not otherwise documented)
  • for now, we will fix mypy by keeping the private cbook._Stack in the type stubs
  • can open a followup issue or PR to deprecate the ToolViewsPositions internals if wanted

fixed aspect overwrites explicitly set data limits

  • accept the pr

fontproperities init

  • distinguishing if string is family or pattern
  • alternative proposal/concern is that someone may have passed in a pattern as a family kwarg arg - undocumented but supported use case
    • we can let that work for the time being and worry about it later
      • can't warn b/c of lack of distinction between names and patterns
        • we can check if a string is a pattern b.c we can run it through the machine
        • can't determine if it's a family name
    • we want to ask not family but we can't get the full set of families
  • merged
  • follow up: either leave it or figure out pattern|family or restrict names

3.10 queue

  • colorizer
  • pybind11

September 19th

Agenda

attending: @tacaswell, @ksunden, @QuLogic, @efiring, @story645

old business

  • RSE

new business

  • @story645 github teams for non-code work:
    • survey: Jerome (@jeromefv-former GSOD) and Tammy (@tgmiller5)
      • survey repository (also backup old survey here)
    • social: Pawel (@pawjast) -> social media projects board
  • 3.10 status / burndown
  • greglucas Potential funding through OpenTeams REPOS project
    • Propose bugs to squash or improvements to make and companies can pay developers to work on those specific items because it may be blocking them

issues and PRs

Notes

RSE updates

  • Tom
    • issue triage and review
    • meeting with Kyle/Elliott
  • Kyle
    • issue / PR triage
    • aiming for 3.10 rc next week
    • implementing a setter for converters on axis objects for 3.10
    • data prototype work
  • Elliott
    • triage work
    • pybind11 and ft2font work
    • close to PR to remove our numpy wrapper (and only use pybind11's)
    • working on sizing polar plots correctly

REPOS project

  • we propose specific projects with budgets
  • companies fund said projects
  • run through openteams
  • follow up again when Greg is on the call

github teams/ recognition of non-code contributions

  • create a repo for the survey
  • add teams for survey and social media
  • Numpy web page "teams" example https://numpy.org/teams/ (generated from Github teams)

September 12th

Agenda

attending : @tacaswell @timhoffm @story645 @IGuKs80UTJCig4yt6Zos7w (greglucas) @ksunden @trygve @QWhXj01mSwmTjk5kN1H_qQ (efiring) @rcomer

old business

New business

  • @greglucas NumFOCUS Summit updates
    • NetworkX requests
      • Bezier path improvements and distance along curve
      • Arrow to the edge of a marker (Greg: Is there a way to update this with the transform stack and get_tightbbox()? I'd be worried about interactively moving a marker and getting the arrow to follow)
  • @greglucas Squash merging rather than asking new contributors to squash themselves
  • pybind11 updates
  • mpl 3.10 updates
  • arrows are hard
  • opt into NF CoC scheme

Notes

NF summit

  • news: Leah is stepping down
  • discussions about
  • CoC updates
    • Opt-in for current projects
    • Opt-out for new projects coming in
    • NumFOCUS Code of Conduct Working Group (coming soon)
    • Code of Conduct Event Response Teams (organizers create for a particular event)
    • coming soon
  • cross-project development
    • discussion with networkX
    • revival of some old PRs from Bruno about Bezier curves
    • enhancements around pointing arrows to edges of other paths
    • (discussion of arrows and why they are)

CoC opt-in

  • high level discussion sound good
  • early drafts had same pro/con as our current process
  • Caswell in in favor to get benifit of a bigger pool
  • wait for actual details before committing

RSE updates

  • Kyle
    • summit most of last week
    • data prototype work on patches
    • issue / PR review
  • Elliott
    • mostly pybind11 work
    • rebased ttfconf PR that switches to using fonttools
      • also fixes a bug we only just discovered with font subsetting
  • Tom
    • project management
    • little bit of review

user survey

  • please contact NF for getting access to a form
  • there exists a rough draft of questions
    • justification of questions still in process
  • aiming for early to mid fall to be ready

squash merge

  • do we want to just squash-merge?
  • vote to (socially) prefer squash merge

pybind11

  • just needs review effort
  • still left after these:
    • macosx (not c++ so leave)
    • some internal stuff that is waiting on these PRs

mpl 3.10

  • can we just cut from main now?
    • colorbar stuff
    • colorizer can be merged
      • what is left on colorizer?
        • currently doing last round of review
        • @timhoffm hoffm should take another look
        • consider if there is a better way to fix isinstance
  • have a proposal for group bar charts from @timhoffm
    • everything is marked as provisional #28560
  • @ksunden will be release manager, we need to update the goverance docs
  • pybind11 in for 3.10 (yes)
  • freethreading?
    • qhull is probably ok
    • contourpy claims in is safe
    • kiwi is a question
    • freetype in theoritically safe
      • ft2font has no locks
      • agg may lock the font cache
    • plan
      • build 313t wheels
      • option 1: do not mark as safe
        • document that we need users to test with the force free-thread env
        • this may be closer to what CPython does
      • option 2: mark as safe
        • numpy has marked them selves safe
        • using a freethreading build is opting into segfaults
      • fliping on/off in a mirco seems ok

September 5th

attending : @efiring, @story645, @QuLogic

Agenda

Old business

  • RSE

Notes

RSE

  • Kyle @ summit
  • Elliot still needs SDG paperwork, has been working primarily on FT2Font work
  • Question about license in font test -no specific license file for Dejavu

pydata nyc

Aug 29th

attending : @greglucas, @efiring, @ksunden, @QuLogic, @story645,

Agenda

Old business

  • RSE
  • GSOC
    • how to manage documentation of colorizer

New business

Notes

RSE

  • Kyle
    • some time on getting NF summit travel sorted
    • wrapped up GSOC evalution
    • working on data prototype Patches
    • PR review
  • Tom
    • Review
    • fixing the docs on the colorizer PR
  • Elliott
    • mostly ft2font, many test cases
    • found a few bugs
    • useful to validate the planned pybind11 work
    • paper work for SDG, plan to start work next week

GSOC

  • have sphinx document private methods by default -> sphinx allows manual over ride
    • make these public abstract methods
  • to handle methods on subclasses
  • can curate which methods are included/excluded by excluding specifc parent classes
  • with collection: document private with sizes for now

Aug 22nd

attending: @greglucas, @efiring, @ksunden, @QuLogic, @story645, @trygvrad, @tacaswell, @litchi

Old business

New business

Notes

GSOC

dev docs not building/updating

  • known bug with a unit example
  • quick fix is to ban numpy2.1.0

new pipeline

  • has PR to @trygve's branch to adjust inheretance so to avoid breaking user code
    • will merge + add some more comment
  • when ScalarMappable is removed, methods can move down to ColorizingArtist

color map PR

Current state of things

RSE updates

  • kyle: data prototype stuff
    • working on patches
    • looking at numpy problems with docs build
    • gsoc
  • Elliott:
    • pybind11 work
    • working on ft2font
    • work on brochure site
  • Tom:
    • mostly review
    • trying to test with cp313t
      • the borrowed c++ refs may go away with pybind11
      • dragons may be in macos backend

analytics

  • now public

survey

  • need to see the questions + pre-design of analysis before it goes out

summit

sending and

  • question about GDPR + discourse
    • can we move our users + history to another instance
  • status of NF CoC for projects

small development grant

  • not this cycle

hatchcolor/edgecolor

  • hatchcolor + pcolor needs to be optional
  • need to make backends forgiving for backends that don't implement hatch

Aug 15th

attending: @efiring, @ksunden, @QuLogic, @story645, @trygvrad, @tgmiller5

Old business

New business

  • story645 docs meeting:
    • access to analytics
    • new user survey ran by Jerome (@jeromefv-former GSOD) and Tammy (@tgmiller5)
  • NF Project summit
    • Cambridge Mass, Sep 5-7
  • Small dev grant CFP - due Sep 30, 2024
    • possibly survey + doc reorg

Pull requests

Notes

user surve + analytics

  • follow-up email sent to steering council

GSOC

  • multivariate/bivariate needs approval
  • pipeline: address reviews then changes
  • potential tracking issue for rest of transition

RSE

  • fixing CI + getting 3.9.2 + pybind

Aug 8

attending: @IGuKs80UTJCig4yt6Zos7w (greglucas), @story645, @tacaswell, @ksunden, @QuLogic, @QWhXj01mSwmTjk5kN1H_qQ(efiring), @trygvrad

Agenda

Old business

  • RSE
  • GSOC
    • ScalarMappable|shim|Colorizer boundaries/ seperation of concerns

New business

  • story645 docs meeting:
    • access to analytics
    • new user survey
  • windows wheel issue

Pull requests:

  • Build for musllinux on ARM - feedback requested (@oscargus: I know that we may not want to build for every combination of platforms, but not how it is determined. Also, currently it takes 97 minutes. If I join the call, will try to remember that, I can provide feedback. If not, I'd appreciate if someone can.)

Notes

Windows wheel issue

  • think we understand the issue and have a draft PR to fix it
  • think we understand:
    • GHA runners have a bunch of different dlls
    • the one that came up first in the PATH found the wrong dll
    • by specifying a path to delvewheel we should be able to fix it
  • bad timing on a devlewheel problem where things changed between when we tested and when we released
    • delevwheel did a release between .post0 and .post1
  • Ian has a draft PR in that needs to be tested
  • Reached out to Steve Dower
    • reccomended that we statically link msvc40.dll
    • should only be done for wheels (not CF)
  • may be wider issue as and it may come back later in other places, may want a shared wheel for this dll?
  • issue with not finding dll
    • one way to fix is set --vsenv but it assumes that msvc is installed and what you want to use
    • meson tries to find any complier, falls back to looking for msvc (which is how it works for most dev machines)
    • if something happens to be on the path, meson uses that BUT those dlls are not on path at run time

TODO:

  • get static linking set up on CI
  • get those wheels tested
  • do 3.9.2 or 3.9.1.post2
    • enable py3.13 if 3.9.2 route, not if 3.9.1.post2 release
  • target close of business Friday

musl arm

  • OP followed up
  • Kyle posted summary, inculding asking for volunteer
    • OP agreed to take role
    • please add comment to yaml
  • delaying speed up until follow up PR
    • if it is a problem, we can evaluate how to fix it
  • do we want to pay for native arm?
    • currently no, but maybe if we find a sponsor for it

GSOC/colorizer

  • has implemented new colorizer class
  • need to agree on some names
  • need typing
  • need tests for new functionality
  • put new class in new file
  • do we want to move norms to norms.py
    • pro: better names
    • con: either deal with deprecation dance (and cost to other) or accept it lives in 2 places (forever?)
    • consenus is to do the move and keep the forwarding forever, but we need to get buy-in from Tim
    • de-document, do not type hint, maybe drop from __all__
    • [EDIT]: An issue has been opened here https://github.com/matplotlib/matplotlib/issues/28690

color

  • put property forwarders on ColorizingArtist

colorizingartist + forwarding functions class (scalarmappbleshim?colorizershim/interface)

moving norm and cmap attributes from an artist to a colorizer

  • if you set a norm/cmap on artist, then sets it on colorizer
    • when we deprecate scalarmappble,
    • will either remove the ability to set or
  • silently overwrite setting properties -> only happens if you explicitly opt into colorizer

-> set_norm: add arg for new colorizer, or use set_colorizer

Aug 1

attending: @efiring, @tacaswell, @ksunden, @QuLogic, @trygve, @timhoffm, @ianthomas23, @story645

Agenda

Old business

New business

Notes

Windows 3.9.1 + nightly (contourpy)

  • try windows 3.9.0 w/ nightly wheels

GSOC: colormapping pipeline

  • proposal is transition from
    scalermappable:norm∘cmap∘data     model to
    mappable:data−>color     model
  • questions on how do we roll this out:
    • vector_* methods: changes are mostly at the backing artist layer (AxesImage, PatchCollection, etc…) so would require writing/maintaining shadow API of Axes.* methods and scalarmappable aware artists
    • putting in a scalarmappable shim so that layer of public API is still available
    • pulling out an initial interface layer PR w/ minimal implementation + shims
      • POC that shows that the new pipeline slots into the existing workflow cleanly
      • shepherded by @tacaswell and @timhoffm
      • fold in colorbar in a later PR
  • colorbar pointing to artist? adding cbar to ScalerMappable

July 25

attending: @trygve @efiring @ksunden @story645 @tacaswell, @QuLogic

Agenda

Old business

  • RSE
  • GSOC

New business

Issues

Notes

GSOC

  • waiting on review
  • second PR, introduces VectorMappable to replace ScalarMappbale
  • suggestion to have a higher-level wrapper that holds both the mappable and the colormap so that we can do coordinated updates
    • also gives an escape hatch to do direct data -> color (without being forced through our norm concept)
  • if we are going to go this route, doing it now seems good
    • conflicts between availabilty vs GSOC timeline
  • needs to do some review

RSE

  • Caswell
    • starting to do review again
  • Kyle
    • start of text in the new system
      • text has a lot of options, most are missing
    • starting to think about documentation
    • reviews
  • Elliott
    • working through open PRs
    • 3.13 wheel PR is mostly ready
    • working on Agg pybind11
    • reviews

SDG + CZI

  • got it, will start work soon
  • given no-cost extension from CZI

mplplaybook

  • down to adding 4 minutes to docs build
  • mpl-playback
  • needs to not add to much time (less than 10 minutes)
    • docs CI should not become the bottle neck
  • needs to not add too much weight to output
  • should hook into the "release mode" machinery
  • hold off on waiting for SG to release with their fix

doc building

  • discussion of why we build docs with the oldest version of Python we support
  • will move to newest and see if we get speed ups

tag protection rules

  • restirct push tags to (to-be-created release manager team)
  • have already added a manual review step before wheels are uploaded to pypi

July 18

attending: @efiring, @ksunden, @QuLogic, @trygvrad, @story645, @rcomer

Agenda

old business

  • RSE
  • GSOC

New business

  • scipy

Issues

Notes

GSOC

  • is at 2/4 PRs for mvp
  • if NormAndColor mappable encapsulating color goes in (waiting on chat w/ @timhoffm) then can potentially hook in data and rgb interpolations
    • find better names

Scipy

June 27

attending: @efiring, @tacaswell, @ksunden, @story645, @QuLogic

Agenda

Old business

New business

  • 3.9.1 schedule
  • 3.10 priorities

Notes

GSOC

  • PRs have been opened
    • discusions about the API
    • do we want to keep ScalarMappable around as anything other than a back-compat shim?
    • keeping vector and scalar versions independent leads to duplicated / parallel classes (like old Qt4/Qt5 classes)
    • some things that are currently ScalarMappable do not have sensible VectorMappable counter parts (e.g. contour)
  • Try to get 's review of VectorMappable, otherwise normal PR rules

RSE

  • Kyle:
    • data prototype stuff, mostly fixed the units example
    • GSOC work
    • PR review
  • Elliott:
    • mostly 3.9.1 things
    • moved some things from 3.9.2 to 3.9-doc
    • review 3.9.1 PRs, looking at axvspan autolimit regression
    • looked at CF build issues
  • Tom
    • on vacation last week, catching up this week
    • some review, need to finish writing a grant report

3.10

3.9.1 target

  • tomorrow (June 28) target date

June 20

attending: @trygve, @QuLogic, @ksunden, @story645

Old business

  • RSE
  • GSOC

Notes

GSOC

  • can add testing by introducing colorbar/norm first
  • package
    n×m×l     array as a
    n×m     array with dtype tuple of length l
    • pro: reduces input to 2D arrays for purpose of manipulation
    • con: may require extra copies
    • check: how data space interpolation is handled

translation:

cheatsheets:

  • translating in a way where layout is respected
  • how do I? construction not universal
  • possibly examples or plot type gallery instead (for tooling)

brochure:

  • refactor into translation friendly version

contribute:

brochure site

June 13

attending:

Agenda

Old business

new business

  • report from dev summit
  • plan for 3.9.1

Notes

dev summit

  • about 40 people in Seattle
  • lots of discussion about SPECs
  • talked with Thomas Fan about WASM builds
    • pyodide has updated build system so that projects can build
    • have it working again, but font loading is broken
      • our optimaztion settings make debugging hard (no symbols names)
    • cibuldwheel can build wasm "wheels" without patches (but does not work)
      • may need to be aware of filesystem sandbox

RSE

  • SDG went
  • data prototype

GSOC

  • have a plan for how to organize PR in to work
  • ongoing discussions of code organizations

3.9.1

  • a TK bug which has been fixed
  • sticky edges on bar bug (PR soon)
  • add back cm.get_cmap
    • some users did not see warning
    • Tim has a PR to put it back
    • Greg and Tom say to put back temporarily
    • question about why users didn't see
      • Tom: is this due to the warning class we use that users never saw it
      • Greg: is this users jumping a bunch of versions
  • other color related questions (behavior of color maps with int intputs) https://github.com/matplotlib/matplotlib/issues/28198
  • should we also add lut= to the mapping registry version?

June 6 CANCELED

May 30

attending: @efiring, @oceanwolf @QuLogic @tacaswell @story645 @IGuKs80UTJCig4yt6Zos7w (gregluca) @rcomer @ksunden

Agenda

Old business

  • RSE
  • GSOC
  • SDG - due tomorrow 31st

New Business

Issues & PRs

Notes

RSE

  • Elliott
    • SDG writing
    • reveiwing stalled new contributor PRs
    • finish some high-dpi fixes for cairo
  • Kyle
    • thinking about grant stuff
    • some review
    • GSOC has started
  • Tom
    • grant stuff
    • some issue review
    • work on grant reports

GSOC

  • breaking up current big PR into smaller chunks
  • looking at git + rebasing tools to help with breaking up into parts

SDG

  • has draft
  • adobe is adding support to add alttext to images
    • do what they do!
  • discussion of details of raqm / freetype interaction

issues / PR

  • translating the brochure page
  • questions about how the tooling works
  • how do the translations get maintained going forward?
  • what is exit strategy?
  • is this actually of value to anyone?
  • @story645 will take point on sorting it out

CF

  • work still needs to be done for 3.9

May 23

attending: @efiring, @ksunden @tacaswell @story645 @QuLogic

Agenda

Old business

  • RSE updates
  • SDG state
  • ROSES state

New business

  • 3.9 release fallout?

Notes

RSE updates

  • Tom
    • avoid writing grants by responding to issues on GH
  • Kyle
    • also working on grant
    • issues on github

May 16

attending: @efiring, @QuLogic, @tacaswell, @ksunden, @story645

Agenda

Old business

  • RSE updates
  • GSOC update

new business

  • 3.9 is out!
  • SDG followup

Notes

3.9

  • we added an import that seems to break, but we think that is a local install issue.
  • promote :mpltype: to be public (otherwise downstream packages that inherit our docstrings will break)
    • what else do we need to make public?
    • The set of thing that look like roles the show up in our source (generated via set($(ack ':[^:]*:`' -o -h --python).split()) )
{'::`',
 ':align:`',
 ':alt:`',
 ':attr:`',
 ':caption:`',
 ':class:`',
 ':context:`',
 ':data:`',
 ':doc:`',
 ':download:`',
 ':envvar:`',
 ':file:`',
 ':format:`',
 ':func:`',
 ':height:`',
 ':include-source:`',
 ':math:`',
 ':mathmpl:`',
 ':meth:`',
 ':mod:`',
 ':mpltype:`',
 ':nofigs:`',
 ':program:`',
 ':rc:`',
 ':ref:`',
 ':scale:`',
 ':show-source-link:`',
 ':sup:`',
 ':target:`',
 ':width:`'}

We think only rc, or mpltype need to be moved up. (@qulogic will do).

GSOC

  • Had kickoff meeting before start of main coding period (starts week after next)
  • need plan for how to get in
  • maybe do not do auto inference at all
  • how to handle complex data?
  • sequencing
    • first PR: 1 norm, 1 colormap
    • follow on PR: additional colormaps
    • follow on PR: complex support
    • follow on PR: add more norms
    • follow on PR: how to combine VectorMappable and ScalarMappable?
  • open questions
    • don't have "over" and "under" but still need "in bounds" vs "bad"
      • to handle out of bounds:
        • fixed color
        • pick "closest" point and use that
    • cartesian or polar coordinates in color space?
    • how to handle categorical
    • legend/colorbar

SDG

  • still being drafted
  • focus on accessibility
    • embedding alt text into output meta-data (as discussed last week)
    • font overhaul work

RSE update

  • Tom
    • grant work + avoiding grantwork by doing issue review
  • Kyle
    • some grant work, data prototype stuff
  • Elliott
    • Jury duty selectiono
    • 3.9 release

May 9

attending: @tacaswell, @greglucas, @QuLogic, @ksunden, @story645, @trygve

Agenda

Old Business

  • RSE
  • 3.9
  • 3.10

New Business

Notes

old business

  • Kyle
    • planning meeting for developer summit
    • meet with a NASA project on Monday
    • working on data prototype
    • helping with on 3.9 wrapup
  • Elliott
    • developer summit meeting
      • array protocol, supply chain validation work
    • 3.9 doc wrapup
    • mpl-sphinx-theme tagging
    • waiting for backports
    • maybe bug with old (>1yr) IPythons
    • tag today or tomorrow
  • Tom
    • mostly off

small development grants

  • Hannah will talk to Jni about feasibility of visual search
  • hatches
  • RFB work
  • pull small/medium projects from CZI grant
    • saving alt text in image metadata
    • needs a plan for figuring out how screen readers read images
    • Elliot is drafting proposal

May 2

attending: @tacaswell @story645 Ian Thomas @ksunden @QuLogic

Agenda

Old Business

  • RSE
  • 3.9
  • 3.10

New Business

Notes

old business

RSE

  • Kyle
    • writing new NASA grant work
    • continuing interacitvity and contains in dataprototype
    • GSOC has been annouced, got 1 slot, need to reach out to start work
  • Elliott
    • reviewing Ian's PR
    • went through all the 3.9rc failures and opened issues or PRs for everything
    • working on getting api changes / whats new rolled up
    • do we want rc3?
      • IPython is happy without one
      • so no RC
    • planning meeting for scientific python developers summit tomorrwo
  • Tom
    • some issue/PR review
    • work on NASA grant.

New business

anyone going to pycon

  • Pavel (social media) and Chahak

IPython integration

  • almost done
  • last thing for 3.9 final
  • due to upstream changes in sphinx/sphinx-gallery
  • only see on appveyor because other CI systems do not install sphinx+sphinx-gallery
    • install from conda environment file
  • PR existing to fix it (#28103)

April 25

attending: @tacaswell @QWhXj01mSwmTjk5kN1H_qQ (Eric) @QuLogic @ksunden @story645

Agenda

Old Business

  • RSE updates
  • GSOC updates

New Business

  • NASA propsoal
  • 3.9 status
  • 3.10 piorities

Notes

RSE updates

GSOC

  • have submited our ranking
  • not heard anything back

NASA

3.10 priorities

  • colormapping work

April 18

attending: @tacaswell @ksunden @QWhXj01mSwmTjk5kN1H_qQ (Efiring) @story645

Agenda

Old business

  • RSE

New Business

Notes

RSE

  • Tom:
    • grant work
    • issues review
  • Kyle
    • little bit of issues review
    • data prototype work

attendance

Please remember to take attendance at meetings

hatch validation

Data prototype

Just in time data + encoding and transform graph = visualizing large high dimensional multivariate datasets more consistently in less lines of code.

just in time computation:

  1. computational graph w/ delayed evaluation
  2. querying and subsampling such that:
    1. computational datasets can be shown at various resolutions
    2. only subset needs to be loaded in memory/visualized

dynamic encoding:

  1. more consistent way to give mappings in multiple artists (Hullman & Qu)
  2. treats the data fields more consistently with respect to encodings

property syncing on artist:

  1. artists can be reused
  2. don't need to be manually updated individually

why graph:

  1. doing transformations, need to maintain/keep track of order for consistency
  2. its inspectable in a way current isn't
  3. can be broken down into smaller chunks, can add custom mapping
  4. moves current implementation graph to data structure

tradeoff:

  1. lots of encodings across different axes and artists - easier to reuse/share be
    • it's currently named different things in different artists
    • attaching the encoding function/mapping/
      ν       to the artist
    • ex: color coding by category in line and scatter plot

Draw time querying + reducing the amount of info artists need to know about themselves facilitates real time data and reusing parts of the visualization.

April 11

attending: @tacaswell @jklymak @pXw4hSgTQF2--OciPYwa1w @QWhXj01mSwmTjk5kN1H_qQ (Anntzer), @IGuKs80UTJCig4yt6Zos7w (Efiring) @ksunden @QWhXj01mSwmTjk5kN1H_qQ

Agenda

Old business

  • RSE updates
  • GSOC/GSOD

New business

Notes

grant recap

RSE updates

  • Kyle
    • data prototype
      • clipping and images in new system
    • some 3.9
    • GSOC
  • Tom
    • grant stuff
    • review

GSOC updates

  • reviews mostly done

RGBA interpolation

  • should remove clipping anyway
  • should look Antony's suggestion of how to filter AA's data to clean up "fuzz" on constant data
  • look into making the deault interplotaion stage depend on ratio between data pixels and screen pixels
  • conclusion:
    • we will look at how to add an 'antialiased' interpolation stage
      • use same criteria as current antilaised flip
      • data space when upsampling
      • RGBA spacing when down sampling

April 04

attending: @efiring, @ksunden, @tacaswell, @rcomer, @story645, @timhoffm, @QuLogic

Agenda

Old business

  • RSE updates
  • GSOC / GSOD updates

New business

Notes

old

RSE updates

Kyle:

  • got 3.8.4 out
  • general review
  • data-prototype work
  • thinking about next NASA grant

Tom:

  • NASA grant
  • issue / bug review

Elliott:

  • prep for 3.9

GSOC / GSOD

  • missed GSOD deadline
  • GSOC
    • have 6 propsoals, look good
    • (not including detailed notes as these are public and do not want to break GSOC rules)
  • need more mentors

new

3.9.0rc status

  • was waiting on 3.8.x mergeup
  • should branch and tag today

NASA funding

  • trying to make formal friends
  • looking for citations from all SMD
  • looking for reviewers
  • cartopy may also may be putting one in

singular colorbars

March 28

attending: @efiring, @ksunden, @story645, @trygvard, @QuLogic,

Agenda

old business

  • RSE updates
  • hannah GSOC apps due April 2nd, 1800UTC (next Tuesday)

new business

  • ksunden Last item I'd like for 3.8.4 #27955

Notes

RSE

  • qulogic: working on Mac bugs; other PR reviews to finish off 3.9
  • ksunden: also working on Mac bugs; tracking numpy 2; pybind11 fix for np2 released; all of blockers are gone for np2 micro-release; Ian released contourpy for np2; work on data prototype (lines, clipping, images); thinking about next NASA grant.

New business

March 21st

attending: @efiring, @ksunden, @QuLogic, @trygvard, @story645

Agenda

old business

  • RSE updates

new business

Notes

RSE

  • qulogic: m1, pybind11, wrapping up 3.9, bouncing tasks to 3.10
  • ksunden:
    • pybind11, numpy 2.0, m1 (ksunden has it locally),
    • dataprototype - dijkstra's algorithm & visualizing graph
  • 3.9 : beta/rc soft deadline is next week
  • 3.8.4: numpy2.0 compliance, is on numpy timeline

singular colorbars

multivariate colorbars

  • gsoc proposal draft, scope of project & components

3.9 followups

  • follow up about sphinx-tags multiline

March 14th

attending: @tacaswell, @efiring, @timhoffm, @QuLogic, @ksunden, @rcomer, @story645, @artemkislovskiy

Agenda

old business

  • RSE updates
  • hannah steering council deadlines/turnaround
    • discuss at end of call

new business

Notes

Intros

RSE updates

  • Elliott
    • mostly getting ready for 3.9
    • macos M1 CI jobs (lots of low tolerance image failures)
    • big triage push of 3.9 issues/PRs
      • took out 1/3, lots of docs left so not blockers for branching
    • pushed updates / rebases to existing PRs
  • Kyle
    • 3.9 wrap up work
    • continuing work on data prototype work
    • numpy 2.0 fallout
      • mostly via pybind11, but may need to add a #define
      • some waiting on dependencies
      • in trianuglation and non-default contouring modes
  • Tom
    • 3.9 help
    • issue/PR review

numpy 2.0 status

  • holding pattern for now

3.8.4 release

  • main reason is for numpy
  • waiting for pybind11 to sort some stuff out for 3.8.4rc

PR review

  • twinned axes cursors

  • internals of autodatelocator logic

    • issue is if one of the levels is empty skip
    • API wise it makes sense to be able to skip levels
    • take propsoed patch, look into fallout in this particualr case off call

  • two cyclers

    • we re-export cycler from cycler and we have a custom wrapper of cycler that does extra validation
    • also have a PR that cleans up imports and removes aliases
    • questions
      1. should we still have both?
      2. should we expose either
    • we do not use plt.cycler internally
      • is in a whats-new
    • our trend is to simplify so don't import
    • but pyplot should be mostly self-contained and a cycler is useful for setting rcparams
      • set_propcycle will make the cycler for you
      • on net, deprecate
    • consensus
      • deprecate, but be willing to back off if disruptive

  • return value of toolbar.save_fig

    • nice way to do this (matches most dialog implementations):
      • None -> No file saved
      • SENTENIL -> can't tell if a file was saved
      • happy-path -> string to path
    • implementation (backwards compatible paranoid safe)
      • None -> don't know if a file was savef
      • SENTINEL -> actively did not save
      • happy-path -> string to path
    • currently return None everywhere
      • proposed implemenatio n
    • one usecase
    • consenus
      • go with the "nice way"
      • make sure API change note is clear that thrid-party backends will have to implement this
      • open an issue with Kivy backend when merged

  • branch label rules

    • consenus
      • try it out
      • previously talked about on call and we agreed to do it
      • no user facing impact, low risk and we can always turn it off if we hate it

  • bxp tick label revert

    • https://github.com/matplotlib/matplotlib/pull/27916
    • the parameter name and then key in the returned dict no longer match
    • attempt was made to replace dict with DataClass, but gets messy in this case
    • propsoal:
      • leave bxp_stats alone
      • migrate to something more static in the future
    • consenus
      • go with this
      • also change the docstring to be clearer what it is

SC timeline

  • one week response window then ping once a week

March 7th

attending: @tacaswell, @QWhXj01mSwmTjk5kN1H_qQ (efiring), @rcomer, @ksunden, @story645, @QuLogic, @timhoffm

Agenda

old business

  • RSE
  • 3.9

new business

  • tacaswell grant updates
  • hannah triage team

Issues and PRs

Notes

RSE updates

Kyle:

  • putting is scipy talk propsoal (on dataproto type)
  • data prototype work, thinking about Artist class tree
  • QoL improvements in repo to make less verbose
  • issue and PR review
  • pushing on yet more mac OSX segfaults / objectiveC level exceptions
    • new or pre-existing? Hard to go back to old versions of OSX so very hard to debug
    • behavior is as documented, but did not notice this behavior before
      • only see when running as a subprocess, test was marked xfail because flaky, lightly tested / under used feature (singleshot timers), test sometimes passes before object crashes
      • subtle interaction with Python GC to produce an invalid pointer Elliott:
  • Catching up from forced vacation
  • bit more pybind11 work (waiting for cgywin test to pass (just merged!))
  • started to work on performance benchmarks
    • working on windows + arm box

Tom:

  • some issue review + scipy talk discussions

3.9 updates

  • worked on clearing out milestone yesterday
  • no major items that should get a madrush to get in
  • RC in 2 weeks
    • how does this interact with numpy 2.0
    • do not hold our RC for numpy beta
    • do another RC as soon as they have an RC
    • hold our 3.9 final for numpy2.0 rc
  • david got new pydata sphinx theme working, please look at devdocs due to big changes in upstream themes
    • use social to drive eyeballs at this

numpy 2.0

https://github.com/numpy/numpy/issues/25918#issuecomment-1980214917

  • asking for sequence of:
    • numpy beta
    • mpl/scipy/… rc (of something)
    • numpy rc
    • mpl/scipy/… finals (of something)

grant updates

triage team

SC needs to be prompt or delegate authority

repo to hold API automation from social

  • good idea, start in @story645 's account and migrate when working

DST is coming

Remember we follow the German schedule.

rgba nan handling + extra copies

https://github.com/matplotlib/matplotlib/pull/27848

Conclusion: only copy if we have to mutate the user input

29 Feb 2024

attending: @ksunden, @QuLogic, @tacaswell, @story645

Agenda

old business

  • RSE reports
  • 3.9 progress

new business

Notes

RSE report

  • Tom: swamped with other work
  • Kyle:
    • preparing for scipy submissions
    • getting examples in data-prototype working again
    • issue triage / PR review
  • Elliott:
    • on vacation
    • made progress on pybind11 work, no PR yet

3.9

  • Still looking on target for RC in March
  • currently 73 open things in milestone

numpy 2.0

  • things are going slowly
  • do micro release when rc to drop upper pin

22 Feb 2024

attending: @efiring, @ksunden, @QuLogic, @greglucas, @story645

Agenda

Old business

  • RSE reports
  • 3.9 progress
  • scipy tutorial planning

new business

notes

PRs

notes

RSE reports

  • ksunden: macOS, data prototype, general issue & PR review
  • qulogic: pr review, finished animation->vid in docs (needs sphinx gallery reviews)

separate edge + hatch

  • setting hatch.color to 'inherit' from edgecolor
    • needs an API behavior note probably
  • use facecolor tracking edgecolor as model
  • on set alpha adjust hatch color?
    • needs an API behavior note probably
  • setting alpha after setting edgecolor will overwrite current, preserve with users hatchcolor
  • Check for parallel behavior, if possible, between Patch and Collection.

side convo on hatch api

pybind11 review

  • can we go through w/ one proficient in pybind11 reviewer?
    • can we just get through with "is this ported correctly?"
  • benchmarking?
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