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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!

A Large Database Does Not Mean Large Shared_buffers

https://www.keithf4.com/a-large-database-does-not-mean-large-shared_buffers/
1•b-man•3m ago•0 comments

Size-Specialized Memory Allocation

https://go.dev/blog/size-specialized-allocations
1•spacey•5m ago•0 comments

What's Scarier Than Agents Taking over Internet? CEO Cartel Trying Take over AI

https://fractalsofchange.substack.com/p/q-whats-scarier-than-a-swarm-of-ai
2•gz5•6m ago•0 comments

AI Cheating Is on the Rise

https://www.vals.ai/blogs/cheating-on-the-rise
3•sanxiyn•8m ago•0 comments

Unplug America

https://engageq.notion.site/unplug-full
4•jethronethro•8m ago•0 comments

Suzanne Ciani's Buchla Cookbook

https://echo.orpheusinstituut.be/article/suzannes-buchla-cookbook
1•stuart78•11m ago•0 comments

OpenAI discloses six new AI safety incidents

https://www.axios.com/2026/09/16/openai-testing-safety-incidents-disclosure
4•toomuchtodo•18m ago•1 comments

The Return of Sail Power: Cargo Ships Are Turning Back to the Wind

https://gcaptain.com/the-return-of-sail-power-cargo-ships-are-turning-back-to-the-wind/
4•gumby•22m ago•0 comments

How the Strategic Petroleum Reserve Works

https://www.construction-physics.com/p/how-the-strategic-petroleum-reserve
3•sklargh•25m ago•0 comments

What Would Canada's Associate Membership of the EU Look Like?

https://www.wsj.com/world/europe/what-would-canadas-associate-membership-of-the-eu-look-like-2f65...
1•toomanyrichies•26m ago•0 comments

Cert/CC covers up Google's data retention fraud

https://medium.com/@istokovicsgyorgy79/how-cert-cc-and-googles-bots-dismissed-a-critical-data-per...
1•Bitu79•27m ago•0 comments

A dead man's switch with client-side crypto and an offline decryptor

https://etergis.com/
1•dannybcarrjr•29m ago•0 comments

Show HN: Hacker News, a little more focused

https://hn-tags.beehivesoftware.xyz/?tags=programming
1•ashish01•31m ago•0 comments

Recursive Meta-Intelligence

https://twitter.com/ProfBuehlerMIT/status/2099834306046664792
1•gmays•31m ago•0 comments

Unlocking the Brain's Potential, with Gül Dölen [video]

https://www.youtube.com/watch?v=Z1Tc64BN3Ac
1•binyu•33m ago•0 comments

Where Yesterday's Decisions Run Today

https://medium.com/@gurvinder372/article-19-where-yesterdays-decisions-quietly-run-today-2412842a...
1•gps372•34m ago•0 comments

AgentLane: Git-native coordination for coding agents

https://github.com/thetrueshags/AgentLane
2•shirag•35m ago•1 comments

Ask HN: How long before we will have a major AI driven cyberincident?

1•jacquesm•37m ago•0 comments

Bringing Correctly Rounded Math to Production with LLVM-Libc

https://devblogs.microsoft.com/cppblog/bringing-correctly-rounded-math-to-production-with-llvm-libc/
1•mmozeiko•40m ago•0 comments

When the fractional part of a float fixes your shader

https://crocidb.com/post/when-the-fractional-part-of-a-float-fixes-your-shader/
1•pavel_lishin•40m ago•0 comments

Otis – a minimal AI agent that runs local models out of the box

https://triangllabs.ai/otis
2•petrenk0n•43m ago•1 comments

Researchers have created a mouse with a partly human brain

https://www.economist.com/science-and-technology/2026/09/16/researchers-have-created-a-mouse-with...
1•sbulaev•43m ago•0 comments

Duotone icon library with 1k icons and 250 flags for React with RTL support

https://github.com/andrsrxn/icons
1•andrsrxn•45m ago•0 comments

Show HN: Nullsec – server-blind encrypted paste

https://nullsec.pntr.dev
3•NevskyNull•47m ago•0 comments

Future of computing is here – OmaVision on Omarchy [video]

https://www.youtube.com/watch?v=shNPZSCICJE
3•shellkr•48m ago•1 comments

Paramount 'Leaks' Study Saying California Will Suffer If Its Merger Is Blocked

https://www.techdirt.com/2026/09/16/paramount-funds-leaks-dodgy-study-saying-california-will-suff...
9•hn_acker•49m ago•1 comments

Mockfreeli – paste a YouTube link, get 5 license-free songs that sound like it

https://mockfreeli.org/
1•ianhil•56m ago•0 comments

The US Gov Graph – a complete map of the federal government

https://graph.civlab.org/us
3•m_adams•57m ago•3 comments

What If You Could Do It All Over?

https://www.newyorker.com/magazine/2020/12/21/what-if-you-could-do-it-all-over
1•samclemens•1h ago•1 comments

Permission to Live (In Japan)

https://buttondown.com/whatever_jamie/archive/finally-permission-to-live-in-japan/
1•LinguaBrowse•1h ago•1 comments