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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!

One Startup Built a (Mostly) China-Free Robot

https://www.wired.com/story/how-one-startup-built-a-mostly-china-free-robot/
1•dwa3592•1m ago•0 comments

Show HN: Whisper transcribes 70-year-olds more accurately than 20-year-olds

https://github.com/Kayvan-Zahiri/asr-age-gap
2•kzahiri•2m ago•0 comments

A Polynomial-Time Quantum Algorithm for the Dihedral Coset Problem

https://eprint.iacr.org/2026/1591
1•csmantle•2m ago•0 comments

Meta Ordered to Pay $942M to Address Harm to Kids from Social Media

https://www.wsj.com/tech/meta-ordered-to-pay-942-million-to-address-harm-to-kids-from-social-medi...
4•boplicity•6m ago•0 comments

Official: Ford's $29,945 Small EV Truck Is Called Fathom

https://www.motortrend.com/news/2028-ford-fathom-ev-pickup-name-price-official
1•thehoff•8m ago•0 comments

Show HN: AI Tutoring with Visual Grounding

https://useknowable.ai/
2•samuelzxu•8m ago•0 comments

McDonald's Cheeseburgers Dunked in Coca‑Cola? The Internet Is Deeply Divided

https://netbajura.blogspot.com/2026/08/reset-et-design-epure-type-medium.html
1•AllForAll•9m ago•0 comments

The Three Types of Creative Thought

https://twitter.com/dioscuri/status/2068625521567519179
1•rzk•9m ago•0 comments

How the U.S. Squandered Its Strategic Advantage

https://www.theatlantic.com/national-security/2026/08/shortage-weapons-shaping-war-iran/688201/
1•petethomas•10m ago•0 comments

OpenAI Response to Apple [pdf]

https://storage.courtlistener.com/recap/gov.uscourts.cand.474095/gov.uscourts.cand.474095.59.0.pdf
1•sanj•11m ago•0 comments

Why America Won't Copy Sweden's Cheap Highway Fix That Saves Lives [video]

https://www.youtube.com/watch?v=jyNEnYaBszk
1•oatmeal1•14m ago•0 comments

Quake 4: The Awakening has been released

https://github.com/jmarshall23/Quake_4_Alpha
1•klaussilveira•14m ago•0 comments

See inside your agents to fix them

https://lexifina.com/blog/see-inside-your-agents-to-fix-them
2•alansaber•17m ago•0 comments

What an Improv Stage Can Teach You About Leading Cross-Cultural Teams in Tokyo

https://www.tokyodev.com/articles/yes-and-what-an-improv-stage-can-teach-you-about-leading-cross-...
2•pwim•22m ago•0 comments

A path tracer through the translation stack

https://ark.marianposaceanu.com/quake-ii-rtx-m4-crossover
2•marianposaceanu•22m ago•0 comments

Google Shakes Up A.I. Leadership

https://www.nytimes.com/2026/08/05/technology/google-ai-leadership.html
2•karakoram•23m ago•1 comments

Objects That Explain America

https://www.nytimes.com/interactive/2026/08/04/opinion/museum-of-america.html
2•mooreds•25m ago•0 comments

Google Shifts AI Power Back to Brin as DeepMind's Hassabis Steps Aside

https://www.ft.com/content/1453e9c2-4922-482f-8720-0bafd7e07df7
2•karakoram•25m ago•1 comments

Arbitrage Exists Between Kalshi and Polymarket but You Can't Exploit It

https://www.zhinit.dev/blog/kalshi-polymarket-arbitrage
3•zhinit•25m ago•0 comments

What I'm Watching So You Don't Have To

https://roninsana.substack.com/p/what-im-watching-so-you-dont-have-a4b
2•petethomas•26m ago•0 comments

Diana Pfeil: Building Confidence in Probabilistic Systems [audio]

https://maintainable.fm/episodes/diana-pfeil-building-confidence-in-probabilistic-systems
1•mooreds•27m ago•0 comments

Draupnir

https://en.wikipedia.org/wiki/Draupnir
2•petethomas•28m ago•0 comments

Louisiana AG Liz Murrill Keeps Opposing Compensation for Wrongfully Convicted

https://www.propublica.org/article/louisiana-wrongful-conviction-compensation-liz-murrill-elvis-b...
2•baddash•29m ago•0 comments

ArenaAllocators don't play nicely with ArrayLists

https://www.openmymind.net/Arena-Allocators-and-ArrayLists/
1•ibobev•29m ago•0 comments

Show HN: Draw.How – Learn to Draw Anything

https://draw.how/
2•nadermx•29m ago•0 comments

Zig's Io.Threaded Is Neat

https://matklad.github.io/2026/08/06/neat-io-threaded.html
1•ibobev•31m ago•0 comments

Equal-Area and Quasi-Conformal Mappings

https://jcgt.org/published/0015/02/02/
1•ibobev•31m ago•0 comments

Invisible Problems

https://idiallo.com/blog/invisible-problems
2•foxfired•34m ago•0 comments

The Monkey Supply Chain

https://www.chinatalk.media/p/the-monkey-supply-chain
2•chirau•35m ago•0 comments

Automatically Retrofitting JIT Compilers

https://www.infoq.com/presentations/yk-meta-tracing-jit-compiler/
1•matt_d•35m ago•0 comments