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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!

Hedra is a 3D open world game I wrote from scratch while in highschool

https://github.com/maxilevi/project-hedra/tree/pre-ai
1•maxilevi•2m ago•0 comments

Hacker Language

https://wiki.c2.com/?HackerLanguage
3•so-cal-schemer•4m ago•2 comments

Show HN: Build a world on your phone, then explore it in mixed reality on Quest

https://3d.camilleworld.com/play/
2•suejunghuh0•7m ago•0 comments

Biggest pet peeve of FPGA toolchains

2•vWijdaan•9m ago•0 comments

Show HN: Zof API Contract Check

https://github.com/Zof-AI/zof-api-contract-check/tree/e9d45f612e75406b1f943c7bab76fab600fa950f
2•kevinkissi•9m ago•0 comments

Most Improbable Agent of You

https://kevinkelly.substack.com/p/most-improbable-agent-of-you
2•cl42•9m ago•0 comments

Pgrust v0.4-Beta

https://pgrust.com/blog/pgrust-v0-4-beta/
2•gourneau•10m ago•0 comments

Show HN: UI micro interactions prompts for AI

https://www.typeui.sh/micro-interactions
2•elwingo1•13m ago•0 comments

Mark Zuckerberg Threatened to Leave California. Meta's Board Cut Him a Deal

https://www.wsj.com/business/mark-zuckerberg-discussed-leaving-california-over-wealth-tax-21b0b522
4•otterley•14m ago•2 comments

Agents write most of our code now, and we should stopped planning sprints

https://usecaddie.app/blog/agents
2•monkeypilot•14m ago•0 comments

United Airlines CEO Calls for National Wealth Tax

https://firstformoney.com/united-airlines-ceo-calls-for-national-wealth-tax-inheritance-tax-i-wou...
4•measurablefunc•15m ago•0 comments

Radio Days

https://oldster.substack.com/p/radio-days
2•NaOH•15m ago•0 comments

Site, Now Registered with an International Standard Serial Number

https://justinribeiro.com/chronicle/2026/10/22/this-site-now-registered-with-an-international-sta...
2•speckx•16m ago•0 comments

Show HN: Defcon like browser game with slower pace and growth

https://sct.tushynski.me/
2•larry-the-agent•16m ago•0 comments

What Reel You Will Get Next

https://heyyviv.github.io/blog/what-reel-you-will-get-next/
2•heyviv•18m ago•0 comments

Award-Winning AI Literature

https://jamesyu.org/award-winning-ai-literature/
3•jamesjyu•18m ago•0 comments

AI and the Enclosure of the Scientific Commons

https://arxiv.org/abs/2610.27251
4•jrepinc•18m ago•0 comments

Utah Woman Speaks Out After Cop Body Slammed Her at Data Center Protest

https://www.commondreams.org/news/utah-data-center-protest
6•DeepLogin•18m ago•1 comments

Pearl Sandbox

https://stardance.hackclub.com/projects/69491
1•philippbuda•19m ago•0 comments

Let's Fly

https://craigmod.com/essays/lets_fly/
1•Tomte•19m ago•0 comments

Show HN: Buildnotes – Turn pull requests in "how it's made" posts

https://buildnotes.releases.sh/
2•zachdunn•19m ago•0 comments

Vulnerability Discovery and Exploitation Trends in the AI Era

https://cloud.google.com/blog/topics/threat-intelligence/vulnerability-discovery-and-exploitation...
2•wslh•20m ago•0 comments

Why governments pulled websites offline over the decades-old PHP language

https://www.cnbc.com/2026/10/22/php2shell-vulnerability-what-is-it-and-is-your-data-at-risk.html
1•smurda•21m ago•0 comments

Retired decorator's Pokémon cards sell for £1.5M

https://www.bbc.co.uk/news/articles/cvp8gy1zwxxwo
3•HelloUsername•21m ago•0 comments

Elon Musk invests about $1B in Skydance

https://www.cnbc.com/2026/10/22/elon-musk-skydance-investment.html
7•mfiguiere•21m ago•2 comments

Delivery robots have moved to the street

https://brandondonnelly.com/delivery-robots-have-moved-to-the-street/
1•speckx•24m ago•0 comments

Hornet: Building Durable Workflows for Local LLMs

https://github.com/matrixswarm/hornet
2•matrixswarm•24m ago•0 comments

It's Time to Take Starlink Away from Elon Musk

https://paulkrugman.substack.com/p/its-time-to-take-starlink-away-from
5•martythemaniak•24m ago•1 comments

Making Startups Powerful

https://www.paulgraham.com/powerful.html
1•shadow28•25m ago•0 comments

Trump Called Musk and Asked Him to Lift Ukraine Starlink Restrictions

https://www.wsj.com/world/trump-called-musk-and-asked-him-to-lift-ukraine-starlink-restrictions-5...
6•JumpCrisscross•25m ago•1 comments