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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!

State of the Fin 2026-05-24

https://jellyfin.org/posts/state-of-the-fin-2026-05-24/
1•salmon•6m ago•0 comments

Crypto code commits fall 75% as developers move to AI projects

https://www.coindesk.com/tech/2026/03/12/crypto-developer-activity-sinks-to-multi-year-low-as-ai-...
1•wslh•7m ago•0 comments

Cited AI Workspace: No More Re-Uploading Files

https://uumuse.ai/en
1•owjdie•7m ago•0 comments

LLM proactively bypassed pnpm's anti-supply-chain-attack config

https://twitter.com/encrypted/status/2058658244328124562
1•EFLKumo•12m ago•0 comments

Show HN: Embed Notion Pages into Your Website

https://embednotion.com/
1•qwikhost•29m ago•0 comments

Stop paying twice Looking for testers for self hosted+Android app cloud drive

https://play.google.com/apps/testing/com.freecloud.android
1•WWIII_Historian•30m ago•0 comments

Does Anybody Actually Like React?

https://jsx.lol
39•brazukadev•31m ago•29 comments

Mondegreen

https://en.wikipedia.org/wiki/Mondegreen
3•bear_with_me•33m ago•0 comments

If you're asked to confirm that you're an adult

https://support.apple.com/en-us/125662
2•mikhael•35m ago•0 comments

The Social Contract of Writing

https://jola.dev/posts/the-social-contract-of-writing
2•zdw•35m ago•0 comments

AI SEO: compare with your competitor

https://usefox.co/competitor-analyzer
2•Creator-io•36m ago•0 comments

Taiwan Overtakes India as Fifth-Largest Stock Market

https://www.bloomberg.com/news/articles/2026-05-26/tsmc-s-relentless-rise-powers-taiwan-s-market-...
3•leopoldj•36m ago•0 comments

This big university system is embracing AI. Students and faculty aren't on board

https://www.npr.org/2026/05/25/nx-s1-5772820/artificial-intelligence-education-technology-califor...
3•voxadam•37m ago•0 comments

Show HN: Aigis – 43% of MCP servers have injection payloads; I built a firewall

1•Charles389no•39m ago•0 comments

Browser-based file encryption tool using WebCrypto

https://secvant.com/
5•unixlor•40m ago•5 comments

We Outgrew Cloudflare D1

https://sushidata.com/blog/2026/05/19/outgrew-cloudflare-d1-everything-tried-building-solution/
2•cebert•40m ago•0 comments

Summer Shred

https://www.supercomp.app/
2•smiru•41m ago•0 comments

Trendshift – trending OSS ranked by momentum, not star count

https://trendshift.io
2•Hylasca•41m ago•0 comments

The Journal of Craptology

https://www.anagram.com/jcrap/
1•colonCapitalDee•43m ago•0 comments

Computer Systems Design and Related Services Employment Statistics

https://fred.stlouisfed.org/series/ces6054150001
1•sakompella•46m ago•0 comments

Iconic: A collection of images that inspire

https://hvpandya.com/iconic
1•mjshashank•46m ago•0 comments

Trump releases new batch of previously classified UFO files

https://www.aljazeera.com/video/newsfeed/2026/5/23/trump-releases-new-batch-of-previously-classif...
5•frasermarlow•47m ago•1 comments

Syncing from the Void: Implementing Delay-Tolerant Burst Tunnels

https://instatunnel.substack.com/p/syncing-from-the-void-implementing
2•iamnothere•52m ago•1 comments

Art-Template NPM Coruna Browser Exploit Compromise

https://haltingproblems.com/analysis/art-template-coruna-npm-compromise/
1•s4mw1se•56m ago•0 comments

Show HN: HN Audio to video AI generator

https://audiocleaner.ai/audio-to-video-ai
2•audio_cleaner•1h ago•0 comments

How We Ship Multiple Times a Day – and Sleep at Night

http://thushw.blogspot.com/2026/05/how-we-ship-multiple-times-day-and.html
1•RyeCombinator•1h ago•0 comments

Game built in Godot performed significantly better than in Unity

https://twitter.com/Pirat_Nation/status/2058865663217975447
2•vincentchau•1h ago•0 comments

We need more horror movies like "Obsession"

https://datagreed.pro/thoughts/we-need-more-horror-movies-like-obsession
2•datagreed•1h ago•0 comments

Scientists MayHave Foundthe Blueprint of the HumanBody Atthe Bottom of the Ocean

https://www.popularmechanics.com/science/animals/a71337415/sea-anemone-bilaterian-found-in-ocean/
2•anikoghosyan•1h ago•1 comments

ReleaseBar: Release freshness dashboard for open source maintainers

https://github.com/steipete/ReleaseBar
1•simonpure•1h ago•0 comments