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The eleventh release of the qlcal package arrivied at CRAN today.

qlcal delivers the calendaring parts of QuantLib. It is provided (for the R package) as a set of included files, so the package is self-contained and does not depend on an external QuantLib library (which can be demanding to build). qlcal covers over sixty country / market calendars and can compute holiday lists, its complement (i.e. business day lists) and much more. Examples are in the README at the repository, the package page, and course at the CRAN package page.

This releases synchronizes qlcal with the QuantLib release 1.34 and contains more updates to 2024 calendars.

Changes in version 0.0.11 (2024-04-27)

• Synchronized with QuantLib 1.34

• Calendar updates for Brazil, India, Singapore, South Africa, Thailand, United States

• Minor continuous integration update

Courtesy of my CRANberries, there is a diffstat report for this release. See the project page and package documentation for more details, and more examples. If you like this or other open-source work I do, you can sponsor me at GitHub.

This post by Dirk Eddelbuettel originated on his Thinking inside the box blog. Please report excessive re-aggregation in third-party for-profit settings.

10 years and 10 days ago I flew home from my very first Python conference.

I left a few days into the PyCon US 2014 sprints and I remember feeling a bit like summer camp was ending. I’d played board games, contributed to an open source project, seen tons of talks, and met a ton of people.

My first Python conference: PyCon US 2014

PyCon 2014 was the first Python conference I attended.

At the start of the conference I only knew a handful of San Diegans. I left having met many more folks. Some of the folks I met I knew from online forums, GitHub repos, or videos I met Kenneth Love, Baptiste Mispelon, Carl Meyer, Eric Holscher in-person, among many others. Most folks I met I had never encountered online, but I was glad to have met in person.

For the most part, I had no idea who anyone was, what they did with Python, or what they might be interested in talking about. I also had no idea what most of the various non-talk activities were. I found out about the Education Summit and hadn’t realized that it required pre-registration. The open spaces are one of my favorite parts of PyCon and I didn’t even they existed until PyCon 2015.

I did stay for a couple days of the sprints and I was grateful for that. Most of the memorable human connections I had were during the sprints. I helped PyVideo upgrade their code base from Python 2 to Python 3 (this was before Will and Sheila stepped down as maintainers). Will guided me through the code base and seemed grateful for the help.

I also got the idea to write front-end JavaScript tests for Django during the sprints and eventually started that process after PyCon thanks to Carl Meyer’s guidance.

Attending regional conferences and DjangoCon

In fall 2014, I attended Django BarCamp at the Eventbrite office. That was my first exposure to the idea of an “unconference”… which I kept in mind when I spotted the open spaces board at PyCon 2015.

Before coming back to Montreal for PyCon 2015, I emailed Harry Percival to ask if he could use a teaching assistant during his tutorial on writing tests. His reply was much more enthusiastic than I expected: “YES YES OH GOD YES THANK YOU THANK YOU THANK YOU TREY”. I was very honored to be able to help Harry, as my testing workflow was heavily inspired by many blog posts he’d written about testing best practices in Django.

I coached at my first Django Girls event in 2015 in Ensenada and then my second at DjangoCon 2015 in Austin. I gave my first lightning talk at DjangoCon 2015, comparing modern JavaScript to Python. It was a lightning talk I had given at the San Diego JavaScript and San Diego Python meetups.

In 2016, I attended PyTennessee in Nashville. I remember attending a dinner of of about a dozen folks who spoke at the conference. I was grateful to get to chat with so many folks whose talks I’d attended.

Presenting talks and tutorials

I presented my first conference tutorial at PyCon 2016 in Portland and my first talk at DjangoCon US 2016 in Philadelphia. I had been presenting lightning talks every few months at my local Python and JavaScript meetups for a few years by then and I had hosted free workshops at my local meetup and paid workshops for training clients.

Having presented locally helped, but presenting on a big stage is always scary.

Volunteering

I volunteered at some of my first few conferences and found that I really enjoyed it. I especially enjoyed running the registration desk, as you’re often the first helpful face that people see coming into the conference.

During PyCon 2016, 2017, and 2018, I co-chaired the open spaces thanks to Anna Ossowski inviting me to help. I had first attended open spaces during PyCon 2015 and I loved them. Talks are great, but so are discussions!

I also ran for the PSF board of directors in 2016 and ended up serving on the board for a few years before stepping down. After my board terms, I volunteered for the PSF Code of Conduct working group for about 6 years. I didn’t even know what the PSF was until PyCon 2015!

A lot of travel… maybe too much

After DjangoCon 2016, I went a bit conference-wild. I attended PyTennessee 2017, PyCaribbean 2017 in Puerto Rico, PyCon US 2017 in Portland, PyCon Australia 2017 in Melbourne, DjangoCon 2017 in Spokane, PyGotham 2017 in NYC, and North Bay Python 2017 in Petaluma.

In 2018 I sponsored PyTennessee and PyOhio and spoke at both. I passed out chocolate chip cookies at PyTennessee as a way to announce the launch of Python Morsels. I also attended PyCon 2018 in Cleveland, DjangoCon 2018 in San Diego, PyGotham 2018, and North Bay Python 2018.

I slowed down a bit in 2019, with just PyCascades (Seattle), PyCon US (Cleveland), PyCon Australia (Sydney), and DjangoCon US (San Diego, which is home for me).

Since the pandemic

Since the start of the pandemic, I’ve attended PyCon US 2022, DjangoCon 2022 in San Diego (in my city for the third time!) and PyCon US 2023. Traveling is more challenging for me than it used to be, but I hope to attend more regional conferences again soon.

Between client work, I’ve been focusing less on conferences and more on blog posts (over here), screencasts, my weekly Python tips emails, and (of course) on Python Morsels.

My journey started locally

I became part of the Python community before I knew I was part of it.

I started using Python professionally in December 2009 and I attended my first San Diego Python meetup in March 2012. I met the organizers, gave some lightning talks, attended Saturday study group sessions (thanks Carol Willing, Alain Domissy, and others for running these), and volunteered to help organize meetups, study groups, and workshops.

By 2014, I had learned from folks online and in-person and I had helped out at my local Python meetup. I had even made a few contributions to some small Django packages I relied on heavily.

I was encouraged to attend PyCon 2014 by others who were attending (thanks Carol, Micah, and Paul among others). The conference was well-worth the occasional feeling of overwhelm.

We’re all just people

The biggest thing I’ve repeatedly learned over the past decade of Python conferences is that we’re all just people.

Carol Willing keynoted PyCon US 2023. But I met Carol as a kind Python user in San Diego who started the first Python study group meetings in Pangea Bakery on Convoy Street.

Jay Miller will be keynoting PyCon US 2024. But I met Jay as an attendee of the Python study group, who was enthusiastic about both learning and teaching others.

My partner, Melanie Arbor, keynoted DjangoCon 2022 along with Jay Miller. When I met Melanie, she was new to Python and was very eager to both learn and help others.

David Lord has made a huge impact on the maintenance of Flask and other Pallets projects. I met David as a Python study group attendee who was an enthusiastic StackOverflow contributor.

I learned a ton from Brandon Rhodes, Ned Batchelder, Russell Keith-Magee, and many others from online videos, forums, and open source projects before I ever met them. But each of them are also just Python-loving people like the rest of us. Russell gives good hugs, Ned is an organizer of his local Python meetup, and Brandon wears the same brand of shoes as me.

We all have people we’ve learned from, we suffer from feelings of inadequacy, we get grumpy sometimes, and we care about the Python language and community in big and small ways.

What’s next for you?

Will you attend a local meetup? Or will you attend an online social event?

If so, consider asking the organize if you can present a 5 minute lightning talk at a future event. As I noted in a DjangoCon 2016 lightning talk, lightning talks are a great way to connect with folks.

Will you attend a Python conference one day? See having a great first PyCon when/if you do.

Remember that we’re all just people though. Some may have a bit more experience (whether at speaking, contributing to open source, or something else), but we’re just people.

This year’s foss-north was the tenth incarnation. I’ve been organizing foss-gbg since 2013, and foss-north since 2016 (two events in 2020 makes it ten in total). It’s been quite a journey – moving between three venues, working with amazing speakers and sponsors, finding a way through the pandemic, while getting to know so many people.

The conference continued when fscons moved from town. Henrik, who helped start fscons has been invaluable during the foss-north years.

Over the years, there has been multiple people helping out with things like announcing speakers, manning the registration booth, finding speakers and creating a program. One of the people who has been around the whole time is Tobias, who is ran a large portion of the show this year and is taking over the lead organizer role.

Private life has been rough over the past two years, so the decision to step back from foss-north has been more or less inevitable. So it’s a great feeling to be able to sit down and enjoy the show and know that the event is in good hands with Tobias.

Thank you all for speaking, visiting, helping out at, and sponsoring foss-north. See you at next year’s event. I’ll have more time to mingle than ever before! ;-)

Last week I attended KDE’s joint sprint on accessibility, sustainability and automation hosted at MBition in Berlin. Having had little opportunity to sit down and discuss things since Akademy 2023 and the KF6 release the scope grew even wider in the end, my notes below only cover a small subset of topics.

Sustainability

I was mainly involved regarding the energy measurement CI tooling here:

• Resolved some problems with measurement runs getting stuck while running standard usage scenarios.
• Set up VNC remote access to debug and resolve similar issues more easily in the future.
• Identified issues in the measurement data processing and reporting pipeline.

There was also some discussion around “sustainable” or “ethical” “AI”. While its pretty clear that open source implementations are strictly preferable over proprietary ones and that locally runnable systems are strictly preferable to hosted ones things get a lot more muddy when it comes to the licensing of the input data.

This boils down to the question to what extend we consider the output data derivative work of the input data. Besides the current legal interpretation (which I’d expect to be subject to change), this is also about how we see this regarding the spirit of share-alike licenses (xGPL, CC-BY-SA, etc).

Accessibility

Overall the most effort here probably went into learning and understanding the internals of the accessibility infrastructure in Qt, and exploring ways how we could make non-trivial things possible with that, something that should pay off going forward.

But there were also some immediate results:

• Submitted a patch to Qt that should make interactive ItemDelegate instance in lists or combo boxes accessible by default. Those inherit from AbstractButton but have their accessibility role changed which makes them lose the default interaction handling at the moment.
• Made the time picker actually accessible and match how similar controls are represented e.g. by Firefox (MR).
• The date picker (while seemingly a very similar control conceptually) proved much harder, but David eventually found a solution for this as well (MR).

Automation

With the AT-SPI accessibility interface also being used for our test automation tooling all of the above also helps here.

• Implemented the missing plural version of finding elements of sub-elements in the AT-SPI Selenium driver (MR).
• Integrated Selenium tests for Itinerary, which then also already found the first bug (MR).

Improvements to monitoring the overall CI status also had some immediate effects:

• K3b, KImageMapEditor and Kirigami Gallery were switched to Qt 6 exclusively, having been identified as already ported.
• poxml (an essential part of the documentation localization toolchain) was identified as not having been ported to Qt 6 yet, which meanwhile has been corrected.
• Unit test failures in kcalutils and messagelib were fixed, allowing to enforce passing unit tests in those repositories.
• Global CI monitoring also helped to identify gaps in CI seed jobs and pointed us to a Qt 6.7 regression affecting ECM, all of which was subsequently fixed.

Other topics

I also got the chance to look at details of the Akademy 2024 venue with David and Tobias (who are familiar with the building), to improve the existing OSM indoor mapping. Having that data for a venue opens new possibilities for conference companion apps, let’s see what we can get implemented in Kongress until September.

Indoor map of the Akademy 2024 venue with routing and event-specific MapCSS stylesheet.

As Nate has reported already we didn’t stay strictly on topic. More discussions I was involved in included:

• Sharing code and components between Itinerary, KTrip and NeoChat. Some initial changes in that general direction have meanwhile been integrated.
• The implications of sunsetting QCA.
• Changes to the release process, product groupings and release frequencies.

You can help!

Getting a bunch of contributors into the same room for a few days is immensely valuable and productive. Being able to do that depends on people or organizations offering suitable venues and organizing such events, as well as on donations to cover the costs of travel and accommodation.

We all know that tools like ChatGPT have really empowered developers to tackle bigger problems. Are you using TailwindCSS and need a login page? Try asking Chat "What is the HTML for a login page with the login username, password, and button in its own section in the center of the page?" It will literally give you a first pass version of it. But how far can you push this? Fred Tubiermont may have taken it farther than most. He built a functioning SaaS product with paying customers by only using ChatGPT and Python. It's fascinating to hear his story.<br/> <br/> <strong>Episode sponsors</strong><br/> <br/> <a href='https://talkpython.fm/mailtrap'>Mailtrap</a><br> <a href='https://talkpython.fm/training'>Talk Python Courses</a><br/> <br/> <strong>Links from the show</strong><br/> <br/> <div><b>Frederick Tubiermont</b>: <a href="https://www.linkedin.com/in/fredericktubiermont/" target="_blank" rel="noopener">linkedin.com</a><br/> <b>The #1 AI Jingle Generator</b>: <a href="https://www.aijinglemaker.com" target="_blank" rel="noopener">aijinglemaker.com</a><br/> <b>Fred's YouTube Channel</b>: <a href="https://www.youtube.com/@callmefred" target="_blank" rel="noopener">youtube.com</a><br/> <b>AI Coding Club</b>: <a href="https://aicodingclub.com" target="_blank" rel="noopener">aicodingclub.com</a><br/> <b>No Code</b>: <a href="https://www.saashub.com/best-no-code-software" target="_blank" rel="noopener">saashub.com</a><br/> <b>Prompt Engineering 101 - Crash Course & Tips</b>: <a href="https://www.youtube.com/watch?v=aOm75o2Z5-o" target="_blank" rel="noopener">youtube.com</a><br/> <b>gpt-engineer</b>: <a href="https://github.com/gpt-engineer-org/gpt-engineer" target="_blank" rel="noopener">github.com</a><br/> <b>Instant Deployments, Effortless Scale</b>: <a href="https://railway.app" target="_blank" rel="noopener">railway.app</a><br/> <b>Self-hosting with superpowers.</b>: <a href="https://coolify.io" target="_blank" rel="noopener">coolify.io</a><br/> <b>The newsletter platform built for growth.</b>: <a href="https://www.beehiiv.com" target="_blank" rel="noopener">beehiiv.com</a><br/> <b>Watch this episode on YouTube</b>: <a href="https://www.youtube.com/watch?v=lbX3B04sS1s" target="_blank" rel="noopener">youtube.com</a><br/> <b>Episode transcripts</b>: <a href="https://talkpython.fm/episodes/transcript/459/i-built-a-python-saas-with-ai" target="_blank" rel="noopener">talkpython.fm</a><br/> <br/> <b>--- Stay in touch with us ---</b><br/> <b>Subscribe to us on YouTube</b>: <a href="https://talkpython.fm/youtube" target="_blank" rel="noopener">youtube.com</a><br/> <b>Follow Talk Python on Mastodon</b>: <a href="https://fosstodon.org/web/@talkpython" target="_blank" rel="noopener"><i class="fa-brands fa-mastodon"></i>talkpython</a><br/> <b>Follow Michael on Mastodon</b>: <a href="https://fosstodon.org/web/@mkennedy" target="_blank" rel="noopener"><i class="fa-brands fa-mastodon"></i>mkennedy</a><br/></div>

New Features

On System Settings’ Region & Language page, you can now choose how you’d like storage sizes to be displayed. This means you can change them to the more common MB and GB style, instead of MiB and GiB, for example. Note that the default value has not changed, but you have the option to change it yourself (Méven Car, Plasma 6.1. Link):

The popular Kirigami.ContextualHelpButton component now has a QtWidgets counterpart: KContextualHelpButton! (Felix Ernst, Frameworks 6.2. Link)

UI Improvements

On X11, Spectacle now makes it obvious that screen recording isn’t supported when you try to run it in recording mode using a global shortcut (Noah Davis, Spectacle 24.05. Link)

Plasma’s Vaults widget now appears visible in the active part of the system tray only when a Vault is actually open, bringing the System Tray closer to its platonic ideal of only showing things that are contextually relevant (me: Nate Graham, Plasma 6.1. Link)

Apps inhibiting sleep and screen locking are now shown by their pretty names, not their technical names (Natalie Clarius, Plasma 6.1. Link):

Adopted the new frameless message header style in Discover, as seen when there’s a distro upgrade available (me: Nate Graham, Plasma 6.1. Link):

Bug Fixes

Kate once again works as expected with multiple virtual desktops, opening files in a new window in the current virtual desktop rather than attaching it to an existing instance in a different virtual desktop (Christoph Cullmann, Kate 24.05. Link)

Fixed Spectacle’s multi-monitor screenshots on X11 not working either at all, or well (Vlad Zahorodnii, and Noah Davis, Plasma 6.0.5. and Spectacle 24.05. Link 1 and link 2)

Fixed a semi-common crash in System Monitor when switching to the Applications page (Arjen Hiemstra, Plasma 6.0.5. Link)

When updating the system using Discover, there are no longer gaps in the updates list as items complete and disappear (Ivan Tkachenko, Plasma 6.0.5. Link)

Plasma’s feature to remember whether Bluetooth was on or off last time now works more reliably (Someone going by the pseudonym “Arctic Lampyrid”, Plasma 6.0.5. Link)

Fixed an issue in Plasma that would cause flickering and stuttering with adaptive sync turned on (Xaver Hugl, Plasma 6.0.5. Link)

Floating panels now de-float when a window reaches the correct distance away from them, as opposed to de-floating too early (Yifan Zhu, Plasma 6.0.5. Link)

Fixed multiple issues involved with LPD printer discovery and queue management (Mike Noe, Plasma 6.1. Link)

When you have multiple Brightness and Color widgets (for example, because you have multiple panels each with a System Tray on it), the Night Light portions of the widgets no longer interfere with one another and interact in strange ways (Natalie Clarius, Plasma 6.1. Link)

Other bug information of note:

• 3 Very high priority Plasma bugs (same as last week). Current list of bugs
• 39 15-minute Plasma bugs (up from 38 last week). Current list of bugs
• 116 KDE bugs of all kinds fixed over the last week Full list of bugs

Performance & Technical

Improved Spectacle-s startup speed on Wayland (Noah Davis, Spectacle 24.05. Link)

Improved the scrolling performance of long scrollable views in Discover. This is an area of focus, so expect more to come soon (Aleix Pol Gonzalez, Plasma 6.0.5. Link)

Reduced visual glitchiness when the GPU does a reset, which can happen due to driver bugs, or, with NVIDIA, when the system goes to sleep (Xaver Hugl, Plasma 6.1. Link)

Implemented support for the org.freedesktop.impl.portal.Secret portal for KWallet, which lets Flatpak apps use it (Nicolas Fella, Frameworks 6.2. Link)

Automation & Systematization

Added some basic GUI tests for Dolphin (Méven Car, link)

Added basic GUI tests for opening Plasma’s Alternate Calendar config page (Fushan Wen, link)

…And Everything Else

This blog only covers the tip of the iceberg! If you’re hungry for more, check out https://planet.kde.org, where you can find more news from other KDE contributors.

How You Can Help

The KDE organization has become important in the world, and your time and labor have helped to bring it there! But as we grow, it’s going to be equally important that this stream of labor be made sustainable, which primarily means paying for it. Right now the vast majority of KDE runs on labor not paid for by KDE e.V. (the nonprofit foundation behind KDE, of which I am a board member), and that’s a problem. We’ve taken steps to change this with paid technical contractors—but those steps are small due to growing but still limited financial resources. If you’d like to help change that, consider donating today!

Otherwise, visit https://community.kde.org/Get_Involved to discover other ways to be part of a project that really matters. Each contributor makes a huge difference in KDE; you are not a number or a cog in a machine! You don’t have to already be a programmer, either. I wasn’t when I got started. Try it, you’ll like it! We don’t bite!