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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•10mo 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!

AutoKernel: Autoresearch for GPU Kernels

https://github.com/RightNow-AI/autokernel
2•frozenseven•1m ago•0 comments

Passkeys were supposed to replace passwords, but they're failing

https://www.howtogeek.com/passkeys-were-supposed-to-replace-passwords-but-theyre-failing-for-the-...
1•vdelitz•2m ago•1 comments

Zen Fascists Will Control You

https://www.ianbetteridge.com/zen-fascist-wi/
1•brunohaid•4m ago•0 comments

Compact-dict – a cache-local, linear probing hash map in Rust

https://github.com/gustawdaniel/compact-dict
1•gustawdaniel•5m ago•1 comments

Prisoner's Dilemma in World Baseball Classic for Mexico and Italy Threatens USA

1•travisjungroth•6m ago•0 comments

I'm going to build my own OpenClaw, with blackjack and bun

https://github.com/rcarmo/piclaw
1•rcarmo•7m ago•0 comments

I Reduced 5 hours of Testing my Agentic AI applcaition to 10 mins

https://github.com/onepaneai/mantis
1•ashmil•8m ago•1 comments

SpacetimeDB: A Short Technical Review

https://strn.cat/w/articles/spacetime/
1•quantumwoke•10m ago•0 comments

Show HN: Lightsecond Video Surveys

https://lightsecond.io/
2•dmonn•11m ago•0 comments

SpaceX launches 15K-pound TV satellite to orbit on its 30th mission of the year

https://www.space.com/space-exploration/launches-spacecraft/spacex-launches-15-000-pound-tv-satel...
2•Brajeshwar•11m ago•0 comments

Story of Weda Bay: How nature is being sacrificed for mining

https://www.theguardian.com/environment/ng-interactive/2026/mar/11/how-mining-threatens-the-world...
2•defrost•14m ago•0 comments

Download Xiaohongshu Video

https://downloadxiaohongshuvideo.com/
2•Evan233•15m ago•0 comments

C++26: The Oxford Variadic Comma

https://www.sandordargo.com/blog/2026/03/11/cpp26-oxford-variadic-comma
3•ingve•16m ago•0 comments

Axllm: DSPy for TypeScript

https://axllm.dev/
2•handfuloflight•18m ago•0 comments

Mathematics is undergoing the biggest change in its history

https://www.newscientist.com/article/2518526-mathematics-is-undergoing-the-biggest-change-in-its-...
4•jonbaer•18m ago•1 comments

Coding agents for production iOS: a senior engineer's setup for 2x the output

https://ignatovv.me/blog/coding-agents-for-production-ios/
3•tosh•18m ago•0 comments

Microsoft patents system for AI helpers to finish games for you

https://www.dexerto.com/gaming/microsoft-patents-system-for-ai-helpers-to-finish-games-for-you-33...
3•JeanKage•20m ago•0 comments

Millennium Challenge 2002

https://en.wikipedia.org/wiki/Millennium_Challenge_2002
1•vrganj•22m ago•0 comments

PromptVault free tool for multi agentic development

2•bohdokas•23m ago•0 comments

Ask HN: How to Plan for a Better GTM for a Digital SaaS Product B2B

1•sriramgonella•26m ago•0 comments

The 'number station' sending mystery messages to Iran

https://www.ft.com/content/86c4a4ca-ca06-4fc8-90fe-4f46357b804f
3•thm•27m ago•0 comments

White-Box Attacks on PhotoDNA Perceptual Hash Function

https://eprint.iacr.org/2026/486
1•_____k•28m ago•0 comments

Michael Faraday: Scientist and Nonconformist (1996)

http://silas.psfc.mit.edu/Faraday/
3•o4c•34m ago•0 comments

An open letter to Grammarly and other plagiarists, thieves and slop merchants

https://www.moryan.com/an-open-letter-to-grammarly-and-other-plagiarists-thieves-and-slop-merchants/
3•october8140•38m ago•0 comments

Reaching net zero by 2050 'cheaper for UK than one fossil fuel crisis'

https://www.theguardian.com/environment/2026/mar/11/reaching-net-zero-by-2050-cheaper-for-uk-than...
3•ljf•41m ago•0 comments

4n6Img Project

1•Hoxed•45m ago•0 comments

Capital Isn't Destiny

https://writing.nikunjk.com/p/capital-isnt-destiny
2•tosh•46m ago•0 comments

Show HN: CLI and TUI for Elasticsearch and OpenSearch

https://github.com/jillesvangurp/kt-search/tree/master/ktsearch-cli
2•jillesvangurp•46m ago•1 comments

FreeBSDKit: Swift Package to Write Capability-Aware FreeBSD Apps

https://christiantietze.de/posts/2026/03/freebsdkit-swift-package-write-capability-aware-freebsd-...
2•frizlab•48m ago•0 comments

At the Boundary of Self-Reference

https://changkun.substack.com/p/at-the-boundary-of-self-reference
3•changkun•49m ago•0 comments