Mailman 3 July 2017 - Matplotlib-devel

step-by-step to installling from source using conda?
by Jody Klymak Aug. 7, 2017

Aug. 7, 2017

Hi all, I’m somewhat stymied trying to understand how to install matplotlib in a development environment using conda. I have MacOS, and I have brew gcc etc. I know how to set up a env in conda. I eventually want to be able to run the tests, so that I can stop uploading things with PEP8 errors etc. Sorry if this is too vague. I can start over again and send specific errors if that is easier, but I would bet someone has a step-by-step. Thanks, Jody

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Matplotlib Finance Maintenance
by dmcnick150＠frontier.com Aug. 5, 2017

Aug. 5, 2017

Hello! What is involved in maintaining the matplotlib.finance module? I am a daily user of the module and consider myself to be an okay Python script writer, but I wonder if maintaining the module is beyond my skill. Thanks for your consideration, David McNickle dmcnick150(a)frontier.com Sent from myMail for iOS

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mpl 2.1 + subprocess32
by Thomas Caswell Aug. 1, 2017

Aug. 1, 2017

Folks, With 2.0 we picked up subprocess32 ( https://pypi.python.org/pypi/subprocess32/) to be able to use the improved subprocess module, however this has caused several problem with [1, 2] due to a bug in the release version and wheels not being published on pypi. The bug is reportedly fixed on master [4] and Mathew Brett has provided them with wheel-building machinery [3], but there has been no motion on that sense May. I think our options are: - document the known issues (meaning wheel-installing mac users have to install xcode and people on very old linux need to install from the subprocess32 master branch, and general linux users need to have a gcc installed) - hope subprocess32 does a release and adopt Matthew's wheels in the next month - vendor the master branch (is there a way we can do this _just_ for the wheels without actually vendoring it in the source tree?) - change dependencies After 2.1 we won't have the last option until 2.2 so if we want to do that, it needs to be done this month. If anyone is motivated to work on changing the dependency, please do so otherwise I am inclined to go with the first option. Tom [1] https://github.com/matplotlib/matplotlib/issues/8361 [2] https://github.com/matplotlib/matplotlib/issues/8433 [3] https://github.com/google/python-subprocess32/issues/14 [4] https://github.com/google/python-subprocess32/issues/12

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Matplotlib 2.1 plans
by Thomas Caswell July 31, 2017

July 31, 2017

Folks, This is a follow up to this weeks phone call notes (but with a better subject line). We currently have about 2 years worth of new feature development on the master branch waiting to be released! We need to get 2.1 tagged and out the door which means we need to triage what will go in the release. The goal is an RC by the end of August [1]. One of the hard decisions is to delay the MEP 22/27 work to the next release [2]. There are currently 651 issues and PRs tagged as 2.1 (and 162 as 2.0.3) so obviously not all of them are going to be fixed / merged for 2.1. To that end, the current blockers for the release are tagged 'release critical' https://github.com/matplotlib/matplotlib/labels/Release%20critical and I am going to: - rename the 2.0.3 milestone to 2.1.1 - start moving things from the 2.1 -> 2.2 milestones Until we tag the RC anything is still fair game to be merged. If you know of any issues that you think are blockers please label them as such (or leave a comment). Tom [1] This is driven because I will be off the internet for the first 2 weeks of Sept and very busy with day-job the last two weeks of Sept so missing this deadline means pushing the release back at least another month. [2] Despite my best intentions, I have not been able to devote enough time to review this, sorry oceanwolf

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documentation error at https://matplotlib.org/api/colorbar_api.html
by keith.briggs＠bt.com July 31, 2017

July 31, 2017

"shrink 1.0; fraction by which to shrink the colorbar" should be something like "shrink 1.0; fraction by which to scale the size size of the colorbar" since the original wording implies that a bigger shrink causes a smaller size. Keith

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2017-07-25 notes
by Thomas Caswell July 30, 2017

July 30, 2017

Folks, My self, anntzer and efiring. We discussed a plans for 2.1 (another email is coming), details of several PRs, and anntzer's recent work on implementing qt5cairo. Tom

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Re: [Matplotlib-devel] IndexError: invalid index to scalar variable. in /matplotlib/ticker.py
by Mike Lee July 24, 2017

July 24, 2017

Dear Sir or Madam, I recently posted a bug report on the GitHub discussion page. https://github.com/matplotlib/matplotlib/issues/8881 I am recently working on updating auto07p to work with matplotlib 2.0. auto07p is software written for ordinary differential equations. I encountered the 'IndexError: invalid index to scalar variable.' in '/matplotlib/ticker.py' It appeared that the istep = np.nonzero(steps >= raw_step)[0][0] was trying to access a 1D array without checking its array dimension. I replaced the line in ticker.py: istep = np.nonzero(steps >= raw_step)[0][0] With the following: arr_dim = np.nonzero(steps >= raw_step).ndim if arr_dim == 1: istep = np.nonzero(steps >= raw_step)[0] elif arr_dim == 2: istep = np.nonzero(steps >= raw_step)[0][0] It worked after the above changes. However, I am not absolutely sure correctness of this fix. May I suggest the developers look further into this issue and resolve this in the future release? Kind regards, Mike Lee

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new committer
by Thomas Caswell July 23, 2017

July 23, 2017

Folks, At scipy we gave commit rights to Chris Holdgraf (@choldgraf). Welcome to the dev team! Tom PS I should be better about sending out announcements when people get commit rights. To those of you who got them recently I apologize for being bad about it in the past.

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GEOS installation for Basemap package
by Ahlam Al Qasim July 17, 2017

July 17, 2017

To whom it may concern, I hope this email finds you well. I am trying to get the Basemap package on my mac, and have been following the instructions based on this webpage: https://matplotlib.org/basemap/users/installing.html. I don't have GEOS already installed so I tried following steps on the website to download it with Basemap: cd geos-3.3.3 export GEOS_DIR=<where you want the libs and headers to go> # A reasonable choice on a Unix-like system is /usr/local, or # if you don't have permission to write there, your home directory. ./configure --prefix=$GEOS_DIR make; make install However, I am getting errors at the third step (make; make install). Attached is a copy of what I get on my python console, if it helps. I think the error occurs when trying to create the /include directory, but I'm not sure how to fix it. I'm still new to python so any help would be much appreciated! Best regards, Ahlam Al Qasim

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documentation / example review
by Thomas Caswell July 16, 2017

July 16, 2017

Folks, We have recently been getting a lot of contributions around the prose documentation and examples (which is great!) however our review process can be very frustrating, particularly for new contributors. I propose that we use the review threshold for documentation and examples of "Is it better than it was before?". https://github.com/matplotlib/matplotlib/pull/8889 Please remember to be kind and patient with new contributors! Tom

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