Want to try Pyrefly on your own project? Our tutorial shows how to catch type errors and measure type coverage.
realpython.com/pyrefly-pyth...
realpython.com/pyrefly-pyth...
November 8, 2026 at 4:00 AM
Want to try Pyrefly on your own project? Our tutorial shows how to catch type errors and measure type coverage.
realpython.com/pyrefly-pyth...
realpython.com/pyrefly-pyth...
someone hated dict[str, Any] so much they built a whole linter. gawain wants type hints on every variable, param, return and class attr, then runs ty / pyrefly. 0.46s across cpython's whole stdlib. annotations all-in, or 'it runs, ship it'? github.com/matheuzgomes...
November 15, 2026 at 7:59 AM
someone hated dict[str, Any] so much they built a whole linter. gawain wants type hints on every variable, param, return and class attr, then runs ty / pyrefly. 0.46s across cpython's whole stdlib. annotations all-in, or 'it runs, ship it'? github.com/matheuzgomes...
I've rolled with regular pyright for ages out of meaningless protest, ty and pyrefly are now better than either so good riddance
November 7, 2026 at 8:04 PM
I've rolled with regular pyright for ages out of meaningless protest, ty and pyrefly are now better than either so good riddance
just made a biiiig post on my profile about the game I've been working on!
pyreflies.itch.io/pantacosm
pyreflies.itch.io/pantacosm
Pantacosm by Pyrefly Studio
Astrologers wield their magic against creatures from another dimension who have come here to consume our universe.
pyreflies.itch.io
November 7, 2026 at 9:36 PM
just made a biiiig post on my profile about the game I've been working on!
pyreflies.itch.io/pantacosm
pyreflies.itch.io/pantacosm
So at the beginning of August (when I was desperate for a project to get my mind off of waiting to hear back from a job I applied for) I participated in a game jam for writing a 5k word ttrpg in a week. I squeaked in just over the word count, but I find what I came up with for it SUPER compelling-
Pantacosm by Pyrefly Studio
Astrologers wield their magic against creatures from another dimension who have come here to consume our universe.
pyreflies.itch.io
November 7, 2026 at 9:12 PM
So at the beginning of August (when I was desperate for a project to get my mind off of waiting to hear back from a job I applied for) I participated in a game jam for writing a 5k word ttrpg in a week. I squeaked in just over the word count, but I find what I came up with for it SUPER compelling-
This week, we are going to discuss Pillow and OpenSSH vulnerabilities, Django, Flet 1.1 & chadcn/ui support, Polars 2.1, Jev, Pyxel Python game engine, Pyrefly, Fly.io skills & MCP, ECMAScript 2026, C++, and more! 🤓
#pythonprogramming #security #web
lewoudar.substack.com/p/whats-up-i...
#pythonprogramming #security #web
lewoudar.substack.com/p/whats-up-i...
What's up in the python and tech environment? - Issue 236
Welcome to issue #236 of What’s up in the Python and tech environment?
lewoudar.substack.com
November 9, 2026 at 1:44 PM
This week, we are going to discuss Pillow and OpenSSH vulnerabilities, Django, Flet 1.1 & chadcn/ui support, Polars 2.1, Jev, Pyxel Python game engine, Pyrefly, Fly.io skills & MCP, ECMAScript 2026, C++, and more! 🤓
#pythonprogramming #security #web
lewoudar.substack.com/p/whats-up-i...
#pythonprogramming #security #web
lewoudar.substack.com/p/whats-up-i...
Google switched its Python monorepo from Pytype to Pyrefly and cut peak compute for type checking by more than 80%.
Incremental rebuilds got up to 98% faster.
Why Pytype had to go, on Google's open source blog:
opensource.googleblog.com/2026/10/adop...
Incremental rebuilds got up to 98% faster.
Why Pytype had to go, on Google's open source blog:
opensource.googleblog.com/2026/10/adop...
November 8, 2026 at 4:00 AM
Google switched its Python monorepo from Pytype to Pyrefly and cut peak compute for type checking by more than 80%.
Incremental rebuilds got up to 98% faster.
Why Pytype had to go, on Google's open source blog:
opensource.googleblog.com/2026/10/adop...
Incremental rebuilds got up to 98% faster.
Why Pytype had to go, on Google's open source blog:
opensource.googleblog.com/2026/10/adop...
Adopting Pyrefly as the Python type checker at Google
opensource.googleblog.com/2026/10/adop...
opensource.googleblog.com/2026/10/adop...
Adopting Pyrefly as the Python type checker at Google
Learn why Google adopted Meta's open source Pyrefly type checker, reducing Python incremental rebuild latencies by up to 98% in our monorepo.
opensource.googleblog.com
November 4, 2026 at 2:09 AM
Adopting Pyrefly as the Python type checker at Google
opensource.googleblog.com/2026/10/adop...
opensource.googleblog.com/2026/10/adop...
The second thing is a playbook called "Pumpkid," obviously inspired by OtGW's Pottsfield. The art for this one came from vintage postcards.
pyreflies.itch.io/pumpkid-bitw
Absolutely no AI was used in either of these, or anything else I make.
pyreflies.itch.io/pumpkid-bitw
Absolutely no AI was used in either of these, or anything else I make.
Pumpkid — a BitW Playbook by Pyrefly Studio
A Babes in the Wood 2e Playbook, inspired by the pumpkin-headed people of Pottsfield from Over The Garden Wall.
pyreflies.itch.io
October 30, 2026 at 3:39 AM
The second thing is a playbook called "Pumpkid," obviously inspired by OtGW's Pottsfield. The art for this one came from vintage postcards.
pyreflies.itch.io/pumpkid-bitw
Absolutely no AI was used in either of these, or anything else I make.
pyreflies.itch.io/pumpkid-bitw
Absolutely no AI was used in either of these, or anything else I make.
The first is a Hollow called "Charlton Freeman's Traveling Circus" which is, as you might guess, an old-timey travelling circus. All the art I used for it came from genuine antique circus advertisements.
pyreflies.itch.io/traveling-ci...
pyreflies.itch.io/traveling-ci...
Charlton Freeman's Traveling Circus (BitW) by Pyrefly Studio
An old-timey circus Hollow for Babes in the Wood
pyreflies.itch.io
October 30, 2026 at 3:39 AM
The first is a Hollow called "Charlton Freeman's Traveling Circus" which is, as you might guess, an old-timey travelling circus. All the art I used for it came from genuine antique circus advertisements.
pyreflies.itch.io/traveling-ci...
pyreflies.itch.io/traveling-ci...
Good style guides mean less debating commas and more understanding code.
Google's Python guide is a practical reference for readable, maintainable Python. We're glad to see Pyrefly recommended for type-checking at build time. 👋
google.github.io/styleguide/p...
Google's Python guide is a practical reference for readable, maintainable Python. We're glad to see Pyrefly recommended for type-checking at build time. 👋
google.github.io/styleguide/p...
Google Style Guides
Style guides for Google-originated open-source projects
google.github.io
October 28, 2026 at 4:00 PM
Good style guides mean less debating commas and more understanding code.
Google's Python guide is a practical reference for readable, maintainable Python. We're glad to see Pyrefly recommended for type-checking at build time. 👋
google.github.io/styleguide/p...
Google's Python guide is a practical reference for readable, maintainable Python. We're glad to see Pyrefly recommended for type-checking at build time. 👋
google.github.io/styleguide/p...
Only had to accept amd64 keyword for pixi because it's still in testing on Gentoo. Installation worked, "pixi run python main.py" worked, "pixi run ng" worked, "pixi run test" worked. "pixi run lint" threw one error in the pyrefly check. "pixi run docs-serve" worked and serving verified.
October 28, 2026 at 3:53 PM
Only had to accept amd64 keyword for pixi because it's still in testing on Gentoo. Installation worked, "pixi run python main.py" worked, "pixi run ng" worked, "pixi run test" worked. "pixi run lint" threw one error in the pyrefly check. "pixi run docs-serve" worked and serving verified.
🐍📰 Pyrefly: A Fast Static Type Checker for Python Projects
realpython.com
October 27, 2026 at 2:11 PM
🐍📰 Pyrefly: A Fast Static Type Checker for Python Projects
❓🐍 Quiz: Pyrefly: A Fast Static Type Checker for Python Projects Quiz
realpython.com
October 27, 2026 at 12:07 PM
❓🐍 Quiz: Pyrefly: A Fast Static Type Checker for Python Projects Quiz
Microsoft introduces the Type Server Protocol and brings Pyrefly support to Pylance.
devblogs.microsoft.com/python/annou...
devblogs.microsoft.com/python/annou...
Pylance + Pyrefly: bring your preferred type checker to Visual Studio Code - Microsoft for Python Developers Blog
Announcing the Type Server Protocol and our partnership with Meta
devblogs.microsoft.com
October 26, 2026 at 6:19 PM
Microsoft introduces the Type Server Protocol and brings Pyrefly support to Pylance.
devblogs.microsoft.com/python/annou...
devblogs.microsoft.com/python/annou...
Microsoft and Meta just split Pylance from Pyright: a new open Type Server Protocol lets Pylance keep its Copilot smarts while Pyrefly handles type checking underneath. Pyright stays default — switching is now a status-bar choice, not a tradeoff. Which checker would you pick?
October 27, 2026 at 4:31 AM
Microsoft and Meta just split Pylance from Pyright: a new open Type Server Protocol lets Pylance keep its Copilot smarts while Pyrefly handles type checking underneath. Pyright stays default — switching is now a status-bar choice, not a tradeoff. Which checker would you pick?
probably not the case, but be wary of LLMs taking shortcuts. there's a Python example: www.christianfindlay.com/blog/basilis... ... (I assume that this could be avoided simply by pointing the LLM at a set of typechecker test cases)
Basilisk Lands in the Python Typing Repo With a 100% Score
How an independent, Rust-based type checker landed in Python's official conformance results at 100% — ahead of Microsoft's Pyright, Meta's Pyrefly, and Astral's ty.
www.christianfindlay.com
October 24, 2026 at 6:01 PM
probably not the case, but be wary of LLMs taking shortcuts. there's a Python example: www.christianfindlay.com/blog/basilis... ... (I assume that this could be avoided simply by pointing the LLM at a set of typechecker test cases)
#Pyrefly has their post about this at pyrefly.org/blog/pyrefly...
Pyrefly + Pylance Integration in VS Code | Pyrefly
You can now use Pyrefly as the type checking backend for Pylance in VS Code.
pyrefly.org
October 22, 2026 at 5:53 AM
#Pyrefly has their post about this at pyrefly.org/blog/pyrefly...
No because there wouldn't be a way to resolve disagreements between type checkers. Pyrefly has a post about running multiple type checkers over your test suite: pyrefly.org/blog/too-man...
Are you really expected to run five type-checkers now? | Pyrefly
Library maintainers may feel overwhelmed by the plurality of type checkers that exist. We offer some guidance on how to focus their efforts where they matter most.
pyrefly.org
October 23, 2026 at 2:34 AM
No because there wouldn't be a way to resolve disagreements between type checkers. Pyrefly has a post about running multiple type checkers over your test suite: pyrefly.org/blog/too-man...
We announced the Type Server Protocol ( #TSP ) today so you can choose your type checker to power things like #Pylance in #vscode . We are launching with support for #Pyrefly so that if it's your preferred type checker in CI it can also be used with Pylance.
devblogs.microsoft.com/python/annou...
devblogs.microsoft.com/python/annou...
Pylance + Pyrefly: bring your preferred type checker to Visual Studio Code - Microsoft for Python Developers Blog
Announcing the Type Server Protocol and our partnership with Meta
devblogs.microsoft.com
October 22, 2026 at 5:53 AM
We announced the Type Server Protocol ( #TSP ) today so you can choose your type checker to power things like #Pylance in #vscode . We are launching with support for #Pyrefly so that if it's your preferred type checker in CI it can also be used with Pylance.
devblogs.microsoft.com/python/annou...
devblogs.microsoft.com/python/annou...
Pyrefly now works with Pylance in VS Code!
The new Type Server Protocol (TSP) allows users to keep using Pylance in VS Code while powering type checking and other diagnostics with Pyrefly
read the blog: pyrefly.org/blog/pyrefly...
The new Type Server Protocol (TSP) allows users to keep using Pylance in VS Code while powering type checking and other diagnostics with Pyrefly
read the blog: pyrefly.org/blog/pyrefly...
Pyrefly + Pylance Integration in VS Code | Pyrefly
You can now use Pyrefly as the type checking backend for Pylance in VS Code.
pyrefly.org
October 21, 2026 at 6:36 PM
Pyrefly now works with Pylance in VS Code!
The new Type Server Protocol (TSP) allows users to keep using Pylance in VS Code while powering type checking and other diagnostics with Pyrefly
read the blog: pyrefly.org/blog/pyrefly...
The new Type Server Protocol (TSP) allows users to keep using Pylance in VS Code while powering type checking and other diagnostics with Pyrefly
read the blog: pyrefly.org/blog/pyrefly...
Google is replacing its long-standing Python type checker, Pytype, with Meta’s open-source Pyrefly.
Why the switch❓
⇨ Up to 10x faster clean builds
⇨ 80%+ reduction in compute costs
⇨ 97% spec conformance
Read more on #InfoQ ⇨ buff.ly/GSv9lyQ
#Python #OpenSource #SoftwareEngineering #DevOps
Why the switch❓
⇨ Up to 10x faster clean builds
⇨ 80%+ reduction in compute costs
⇨ 97% spec conformance
Read more on #InfoQ ⇨ buff.ly/GSv9lyQ
#Python #OpenSource #SoftwareEngineering #DevOps
October 21, 2026 at 4:02 PM
Google is replacing its long-standing Python type checker, Pytype, with Meta’s open-source Pyrefly.
Why the switch❓
⇨ Up to 10x faster clean builds
⇨ 80%+ reduction in compute costs
⇨ 97% spec conformance
Read more on #InfoQ ⇨ buff.ly/GSv9lyQ
#Python #OpenSource #SoftwareEngineering #DevOps
Why the switch❓
⇨ Up to 10x faster clean builds
⇨ 80%+ reduction in compute costs
⇨ 97% spec conformance
Read more on #InfoQ ⇨ buff.ly/GSv9lyQ
#Python #OpenSource #SoftwareEngineering #DevOps