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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!

What even IS runtime infrastructure?

https://blog.bridgexapi.io/why-developers-need-programmable-evm-runtime-infrastructure
1•Bridgexapi•5m ago•0 comments

Explore Punks NFT Collection on Polygon Blockchain

https://punks_4.x.rarible.com
1•demro•7m ago•1 comments

Show HN: Clark-Browser – Stealth Chromium

https://github.com/clark-labs-inc/clark-browser
1•stan_kirdey•8m ago•0 comments

Google: Continued commitment to Chromebooks, and looking ahead

https://cloud.google.com/blog/products/chrome-enterprise/our-continued-commitment-to-chromebooks-...
2•pabs3•11m ago•0 comments

Sieve – scans Cursor/Claude chat history for leaked API keys

https://apps.apple.com/us/app/sieve-secret-scanner/id6767409365?mt=12
1•helpful_human•11m ago•0 comments

The Mac mini just became infrastructure

https://thenewstack.io/mac-mini-agent-infrastructure/
1•rav3ndust•13m ago•0 comments

Walmart, Target and Dollar General Spend Billions to Make Stores Look Nicer

https://www.nytimes.com/2026/05/11/business/retailers-stores-renovations.html
2•lxm•15m ago•0 comments

We built a runtime activation layer for autonomous AI agents

https://www.santaclawz.ai/
1•evan-k-global•17m ago•0 comments

PgBackRest Will Continue

https://pgbackrest.org/news.html#will-continue
2•thunderbong•17m ago•0 comments

Peter Salus has died

https://www.tuhs.org/pipermail/tuhs/2026-May/033750.html
11•speckx•21m ago•0 comments

Material Nonpublic Information at Hughes High

https://arcove.substack.com/p/material-nonpublic-information-at-hughes-high
1•jfil•22m ago•0 comments

AI Grant Writing Assistant

https://grantbot.pl
1•tredi•24m ago•0 comments

Research shows a clear and communicated AI stance acts as a powerful amplifier

https://dora.dev/capabilities/clear-and-communicated-ai-stance/
1•riffic•25m ago•0 comments

Shuffle multiple artists' full discographies on Spotify (Chrome extension

https://chromewebstore.google.com/detail/discogmix-multi-artist-sh/oejdmfhdpfpimljokmknjifehccmanko
1•esayli•30m ago•0 comments

The down fall of bug bounties

https://shubs.io/the-down-fall-of-bug-bounties/
2•infosecau•32m ago•0 comments

Vault Pro – AI Scaffolder for Obsidian Project Notes (Node/Claude)

https://checkout.stripe.com/c/pay/cs_live_a1T5cP4xxXFYhY045VE1ui9fm1NJj0ACL1umdUosCWtXUSR8CKrdNPs...
1•bshelby88•33m ago•0 comments

Living 35 ft underground: inside a preserved Titan II nuclear missile silo

https://www.youtube.com/watch?v=rSFSnOBYlbM
1•bane•37m ago•0 comments

An Overview of the Mathematical Theory of Communication for Philosophers [pdf]

https://theinformationalturn.net/wp-content/uploads/2012/03/MTC_overview.pdf
2•teleforce•37m ago•0 comments

Baseball is learning to live with shorter attention spans

https://www.ft.com/content/f499089d-a104-44ad-9773-1ef31715afae
3•petethomas•38m ago•0 comments

People who use ChatGPT for writing are accurate detectors of AI text (2025)

https://arxiv.org/abs/2501.15654
2•lexandstuff•41m ago•0 comments

Can AI just replace me already? – A comparative AI-writing ID experiment

https://www.richardhanania.com/p/can-ai-replace-me-already
1•botacode•42m ago•0 comments

OpenBSD/zaurus: pocket-sized BSD

http://miod.online.fr/software/openbsd/stories/zaurus2.html
1•uticus•47m ago•1 comments

US Joint Forces Command Millennium Challenge 2002: Experiment Report [pdf]

https://www.esd.whs.mil/Portals/54/Documents/FOID/Reading%20Room/Joint_Staff/12-F-0344-Millennium...
1•KnuthIsGod•48m ago•0 comments

War Game Exposed U.S. Vulnerability to Low-Tech Warfare

https://nsarchive.gwu.edu/news/2024-11-01/rigged-war-game-exposed-us-vulnerability-low-tech-warfare
4•KnuthIsGod•52m ago•3 comments

Bluesky Radio – Hosted by Opus 4.7

https://bskyrad.io/
2•wilted-iris•56m ago•0 comments

Data centers raise nearby temperatures by up to 4 degrees in Phoenix

https://techxplore.com/news/2026-05-centers-nearby-temperatures-degrees-phoenix.html
4•limitedfrom•1h ago•1 comments

My First Game, Shadow Dungeon (Procedural Roguelike)

https://dynaq.itch.io/shadow-dungeon
3•mik09•1h ago•1 comments

Ball Simulator in Python Made with Claude

https://github.com/simin75simin/ball-sandbox
2•mik09•1h ago•1 comments

Google's Own AI Researchers Jockey for Access to Its Computing

https://www.bloomberg.com/news/articles/2026-05-18/google-s-own-ai-researchers-jockey-for-access-...
2•osnium123•1h ago•0 comments

Have I Been Pwned: Colombian fintech company leaks 34.5M accounts in March 2026

https://haveibeenpwned.com/Breach/ADDI
4•guessmyname•1h ago•0 comments