Seth Larson

@sethmlarson

Python core developer, Security & Fellow of Python Software Foundation (@python.org) 🐍 Minnesoootan, he/him, #Python, #opensource, #security #retrogaming 🌐

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Seth Larson@sethmlarson· 21d

While I was in Kraków, Poland during #EuroPython 2026 I was able to sneak away from sprints and buy a few PAL region #GameCube games. This was on Sunday, which means that many stores are closed until Monday... except for one! 🎮️ Read more: sethmlarson.dev/pal-gamecube... #retrogaming #gaming

Video game store shelves full of retro and new video games.

Seth Larson@sethmlarson· Jul 9

You’d think that the King of Red Lions being on the disk would be a dead giveaway… but the Japanese revision of FSA includes Tetra’s Trackers and characters from Wind Waker! 😵‍💫

Tetra from Wind Waker on the back of the Four Swords Adventures manual

Seth Larson@sethmlarson· Jul 9

This project took longer because I had to reorder my Japanese revision on eBay, the seller for the first attempt had made a mistake that I also missed… see if you can tell the difference at a glance? 🙈 #gamecube #nintendo #retrogaming

Two boxes, manuals and GameCube disks for supposedly Legend of Zelda Four Swords Adventures +…. But the right disk is blue green and the left disk is green… the right disk is for LOZ Wind Waker not Four Swords Adventures!

Seth Larson@sethmlarson· Jun 29

Last week I attended and managed a session for UN Open Source Week 2026. I've published my notes and a few thoughts following the event. Thanks to @sovereign.tech and Alpha-Omega for sponsoring my attendance at the event. 👉 sethmlarson.dev/un-open-sour... #opensource #oss #security #supplychain

Seth Larson and Mirko Swillus leading a session during the UN Open Source Week "Maintain-a-thon" on LLMs and vulnerability handling for Open Source projects.

Seth Larson@sethmlarson· Jun 11

Is that a semicolon in a Python pull request diff? Linting is important: screen included. sethmlarson.dev/linting-scre...

A Python pull request with a semicolon unexpectedly...

Seth Larson@sethmlarson· Jun 5

Is the donut in Super Smash Bros. Brawl from Mister Donut? You decide! 🍩🍩 sethmlarson.dev/is-the-donut...

Seth Larson@sethmlarson· Jun 5

Wait a second… is the donut in Super Smash Bros Brawl… a Mister Donut?? 🤯🍩 Mister Donut museum: www.misterdonut.jp/enjoy/zukan/... Food JPEGs in Smash Bros and Kirby Air Riders: sethmlarson.dev/food-jpegs-i...

Seth Larson@sethmlarson· May 16

#urllib3 is now available on flopPyPI! 💾 #pycon #pyconus #pyconus2026

Floppy disk with “urllib3==2.7.0” and a urllib3 sticker on the label.

Seth Larson@sethmlarson· May 5

Not one but two of my blog posts are on the HN front page simultaneously... that's a new one! 🤯

HackerNews front page showing "Hand Drawn QR Codes" and "The Frog for Whom the Bell Tolls" at positions 14 and 25.

Seth Larson@sethmlarson· Apr 30

The game was only released in Japanese, despite multiple re-releases to the 3DS eShop and Nintendo Classics. I detailed how I played by applying the fan-created English translation patch. sethmlarson.dev/the-frog-for...

On the left, the original Japanese title screen. On the right, the title screen with the English translation patch applied: "For the Frog the Bell Tolls". The official title translation referenced by Nintendo is "The Frog for Whom the Bell Tolls".

Seth Larson@sethmlarson· Apr 30

🐸🔔 Kaeru no Tame ni Kane wa Naru or “The Frog for Whom the Bell Tolls” is a quick and funny puzzle “RPG” with many references and shared DNA with some of my favorite games. Recommended as a snack between games in your backlog 💜 sethmlarson.dev/the-frog-for... #gameboy #gb #retrogaming #nintendo

Picture of my “Kaeru no Tame ni Kane wa Naru” Game Boy cartridge.

Seth Larson@sethmlarson· Apr 29

The #PyConUS 2026 app is available and you can see the NEW “Trailblazing Python Security” talk track in the app! ⭐ Smash that “Favorite all Trailblazing Python Security” talks button and I'll see you in Long Beach soon 🤩

Trailblazing Python Security talk track in app with a button that says "Favorite all Trailblazing Python Security" talks.

Seth Larson@sethmlarson· Apr 20

Nintendo e-Reader in 2026 👀

Dizzy Sheep Distaster EX, Retro Dot Cards Series One, e-xtender for the Analogue Pocket, original Retro Dot Cards Solitaire pre-release card, and an e-Reader oeripheral.

Seth Larson@sethmlarson· Mar 28

Received the #Lego #Gameboy as a gift! My chances of doing buildaboy.co by @nataliethenerd.com have suddenly increased astronomically.

Seth Larson@sethmlarson· Mar 27

@thewulffden.com @bob.thewulffden.com Got the GameSir Pocket Taco from your review. Love it so far!

Phone with two Pocket Tacos on either end completely obscuring the emulator on screen.

Seth Larson@sethmlarson· Mar 7

TIL about the <optgroup> #HTML element. I feel like I learn so much about HTML and JS whenever I create an interactive piece for the blog 🤩 developer.mozilla.org/en-US/docs/W...

List of Nintendo racing games like Mario Kart, F-Zero, and Kirby Air Ride grouped by console.

Seth Larson@sethmlarson· Mar 6

Preview for an upcoming article 👀 #mariokart #nintendo #gaming

A table showing different Mario Kart titles along with the columns "Platform", "Year", "Portable?", "Local?", "LAN?", "Wireless?", and "Game Sharing?". The columns contain true or false boolean values, and the "true" values are highlighted in green.

Seth Larson@sethmlarson· Jan 26

A fridge magnet of the Peanuts character "Snoopy" in a giant red puffer coat

Seth Larson@sethmlarson· Jan 1

Also I was very tempted to publish my #blogroll with the original title of "Drawing with zero-width characters" by Benjamin Swerdlow... it definitely crowds out the other recent entries 🤣 sethmlarson.dev/blogroll

Blogroll featuring many other blogs, but a single blog title appears heavily corrupted, covering all the other parts of the screen with garbled demon-text.

Seth Larson@sethmlarson· Dec 29

I created a “Wrapped”-style summary of gaming in 2025 on the Nintendo #GameCube, #Switch, and #Switch2 with my favorite games, a public dataset, and a bunch of SQL queries. This is my last post in 2025, thanks for reading! 💜 👉 sethmlarson.dev/nintendo-gam... #gaming #nintendoswitch #nintendo

GitHub contributor graph style boxes of blue and red showing days playing particular consoles.

Seth Larson@sethmlarson· Dec 26

I published my notes on how I quickly setup a development environment for @play.date on Ubuntu, a hello-world app, and testing with the simulator and actual hardware: sethmlarson.dev/getting-star... #playdate #gamedev #gamedevelopment #lua #ubuntu

Playdate console running a simple game with the text "Hello from sethmlarson.dev" and a QR code to https://sethmlarson.dev/getting-started-with-playdate-on-ubuntu

Seth Larson@sethmlarson· Dec 18

The @deltaemulator.com added beta support for #SEGA #Genesis and #MasterSystem games and I'm excited about it :) sethmlarson.dev/delta-emulat...

Playing Sonic the Hedgehog 3 & Knuckles on iOS using the Delta emulator

Seth Larson@sethmlarson· Dec 11

Upcoming project for the blog... 👀 🍎🍞🍔🍰 #kirbyairriders #smashbros

Table showing food sprites for Kirby Air Ride, Smash Bros Melee, Brawl, 3DS, Wii U, and Ultimate. The rows shown are apples, bananas, bread, burgers, and cake.

Seth Larson@sethmlarson· Nov 29

Got my first #RSS notification for my “Nintendo Classics” tracker! 🤩 sethmlarson.dev/rss-feed-for... #nintendo #nintendoswitch #nintendoclassics

RSS feed reader item titled "Battletoads, Ninja Gaiden II, Bionic Commando, and Kid Icarus: Of Myths and Monsters" are now available on Nintendo Classics.

Seth Larson@sethmlarson· Nov 25

Mobile browsers see telephone numbers everywhere! Just like Excel and dates, mobile browsers replace text with clickable <a> elements for dialing a telephone number in HTML. Read more: sethmlarson.dev/mobile-brows... #html #css #browser #mobile #phone

Numbers either highlighted or not in a list. Numbers are highlighted inconsistently, based on whether the browser is automatically detecting a phone number or not.

Seth Larson@sethmlarson· Nov 8

I've only been waiting for this moment for... 22 years? 🥲

Kirby Air Ride for the GameCube released in 2003.

Seth Larson@sethmlarson· Nov 6

Any #PikminBloom players out there? The arrival of Ice Pikmin means that collecting complete sets of decor within an event just got more difficult... 😬 I created a #Python script to simulate the number of seedlings required before and after the change. Read more: sethmlarson.dev/ice-pikmin-a...

Table showing the before and after Ice Pikmin percentage chances of completing a decor set for a number of seedlings collected. For example, if you collect 20 seedlings before Ice Pikmin you'd have a 70.4% chance of completing the set versus only 53.1% chance of completing the set with Ice Pikmin. This represents a 17.3% chance drop in likelihood of completing the set with this amount of seedlings.

Seth Larson@sethmlarson· Oct 22

This is a funny short story about contributing to internet standards in unexpected ways, like drawing ASCII art. Thanks to @filippo.abyssdomain.expert firstly for the work you do in cryptography and the opportunity to uniquely contribute to PQC :) Read more: sethmlarson.dev/drawing-an-a...

ASCII art of an X-Wing, TIE fighter, and imperial lambda shuttle

Seth Larson@sethmlarson· Oct 16

🔁 Re(blog, tweet, toot, skoot, skeet) sethmlarson.dev/reblog-tweet...

Railroad diagram showing the words "reblog", "retweet", "retoot", "reskoot", "reskeet", "repost".

Seth Larson@sethmlarson· Oct 7

The “Nintendo Classics” collection has hundreds of retro games from Nintendo and Sega consoles from NES to GameCube. I created a dataset about these games and mapped them to real-life physical prices, with graphs and tables. Read more: sethmlarson.dev/nintendo-cla...