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Show HN: Reaktiv – I built Excel-like reactive programming for Python

https://bui.app/when-frontend-reactivity-meets-backend-python-the-story-of-my-first-1-000-download-library/
2•buibuibui•1y ago
Hi HN! I created Reaktiv, a Python library bringing reactive programming to the backend world that recently hit 1,000+ monthly downloads.

I'm actively promoting it because I believe signal-based reactivity (a concept that spread rapidly in frontend development) has huge untapped potential in Python. My breakthrough came when I stopped describing it as "Angular signals for Python" and started calling it "Excel-like computation graphs" - suddenly Python developers understood the value.

The library automatically tracks dependencies between computations, only recalculating values when dependencies change. This eliminates manual dependency tracking, prevents synchronization bugs, and reduces cognitive load when managing complex state.

Interestingly, I've noticed some initial interest from data scientists, though I'm still exploring what specific problems it might solve for them. I also believe the Home Assistant/IoT communities could benefit greatly from this approach.

Would love your thoughts on bringing frontend patterns to backend development!

Show HN: A lunisolar calendar with equinox-decided leap months, in one .js file

https://carpocratian.org/en/church/calendar/
1•flammafex•1m ago•0 comments

Don't expect supersize profits from Anthropic any time soon

https://www.economist.com/business/2026/10/26/dont-expect-supersize-profits-from-anthropic-any-ti...
1•Anon84•1m ago•0 comments

Things to Think About Post-Election (US)

https://movementvoterproject.substack.com/p/top-10-things-to-think-about-postelection
1•verdverm•5m ago•0 comments

Shanghai SME subsidies: free English checklist of 9 official sites

https://shituapp.com/dot/en/checklist.html
1•subsidyradar•6m ago•0 comments

(VCF Midwest 2026) Building a Living 90s Internet for Vintage Computers [video]

https://www.youtube.com/watch?v=mZfJ-sulqQs
1•CursedSilicon•6m ago•0 comments

Show HN: Sping – A modern, multi-target network diagnostic tool written in Rust

https://github.com/LambdaBytes/sping
1•lambdabytes•9m ago•0 comments

James Pond 2: Codename RoboCod – Recompiled

https://github.com/griches/JamesPond2RobocodRecomp
1•doener•11m ago•0 comments

Star Trek actor Walter Koenig, who played Pavel Chekov, dies aged 90

https://www.bbc.com/news/articles/cv0ldjzg9xppo
3•Archelaos•12m ago•0 comments

Pilcrow's Auth Book

https://auth.pilcrowonpaper.com
1•thunderbong•13m ago•0 comments

Show HN: Live speech-to-text on an ESP32-P4 microcontroller, no cloud

https://github.com/BoumedineBillal/esp32-pie-asr
1•boumedinebillal•15m ago•0 comments

How does this even work

2•nexisshop•15m ago•0 comments

JWST and ALMA reveal a dusty, rapidly growing black hole in the early universe

https://phys.org/news/2026-10-jwst-alma-reveal-dusty-rapidly.html
1•wglb•20m ago•0 comments

Southern Africa's first known stenciled rock art found hiding in plain sight

https://phys.org/news/2026-10-southern-africa-stenciled-art-plain.html
2•wglb•21m ago•0 comments

Show HN: Better Design – alternative to Claude Design, for any coding agents

https://better-design.com
1•marvinkr•23m ago•0 comments

About the compromised eMudhra intermediate CAs (Published Date: 2026-10-23)

https://support.apple.com/en-us/149555
1•DASD•25m ago•0 comments

Evolving a Live Game Engine: Introducing ECS Without a Full Rewrite [video]

https://www.youtube.com/watch?v=Q4490CzX_ag
1•zhorov10000•28m ago•1 comments

Cooks – open-source sales engagement (sequences, parallel dialer, MCP)

https://cooks-sales.vercel.app
1•beargrizzzy•33m ago•0 comments

Show HN: Shittyscreenshares.com

https://shittyscreenshare.com/
2•Sean-Der•37m ago•0 comments

Some cybersecurity x AI dichotomies

https://cje.io/2026/10/26/some-cyber-ai-dichotomies/
1•caseyjohnellis•38m ago•0 comments

AI talk has nearly doubled outside tech. Proof of payoff is still rare

https://equibles.com/research/ai-talk-has-nearly-doubled-outside-tech-proof-of-payoff-is-still-rare
2•daniel3303•39m ago•0 comments

Show HN: Rethink, a prisoner's dilemma tournament you can enter in plain English

https://rethink.asilentpond.com/
1•ducklin404•42m ago•0 comments

Flint is an open-weight mixture-of-experts model from Recursive

https://openrouter.ai/recursive/flint-v1.0:free
1•doener•45m ago•0 comments

The $2k php2shell Challenge Was Unexploitable [video]

https://www.youtube.com/watch?v=VhNiMWtOutw
1•marvinborner•45m ago•0 comments

NDCG Is Overrated (2023)

https://softwaredoug.com/blog/2023/05/06/ndcg-is-overrated
1•softwaredoug•47m ago•0 comments

Heavenly delights of hashing numbers under EQUALP

https://turtleware.eu/posts/Heavenly-delights-of-hashing-numbers-under-EQUALP.html
1•ibobev•47m ago•0 comments

Software stack is an abstraction made for humans. AI can skip it

https://vithushansylvester.com/writing/what-is-left-when-the-programmer-is-not-human
2•hacker_v_s•48m ago•0 comments

Pharo – A pure object-oriented programming language and a powerful environment

https://pharo.org/
1•ibobev•48m ago•0 comments

Tinfoil – Less Is More: From 1M Lines of Firmware to 300 of Assembly

https://tinfoil.sh/blog/2026-10-25-less-is-more
1•ibobev•49m ago•0 comments

Therightaimodel

https://www.therightaimodel.com/
1•ayaan-ipa•56m ago•1 comments

Caveats of iPad Mini

https://www.brachkow.com/notes/caveats-of-ipad-mini/
1•brachkow•59m ago•0 comments