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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!

StatusPerch – Organize your Mac menu bar

https://qingtan-labs.github.io/StatusPerch/
1•eustoria•50s ago•0 comments

Sysdraw – System design diagrams, sketched in the browser

https://sysdraw.app
1•eustoria•2m ago•0 comments

Understanding technical papers is so hard & why are some authors so narcisstic?

1•ahanjura•5m ago•0 comments

NASA Ad Astra Initiative

https://science.nasa.gov/astrophysics/programs/physics-of-the-cosmos/community/ad-astra/
1•xqcgrek2•8m ago•0 comments

Sum types in Go, or how to model events the compiler can check

https://viviersoft.com/blog/ddd-go-1-sum-types/
1•lanath•10m ago•0 comments

Farmed Salmon May Not Be as Nutritious as It Once Was, New Research Suggests

https://insideclimatenews.org/news/04092026/farmed-salmon-losing-healthy-fatty-acids/
1•Alephinitesimal•10m ago•0 comments

Customer Support Is Broken. VoraDesk Is Building a Better Way

https://substack.com/profile/206275102-akanmu-akinkunmi/note/c-331801194
1•PetrJoe•14m ago•0 comments

Customizing my Compaq MX-11800 keyboard

https://blog.webb.page/WM-102
3•NetOpWibby•15m ago•0 comments

Gmail/Google Docs Down?

3•kappi•16m ago•0 comments

Tesla touts European supervised self-driving safety data ahead of EU vote

https://www.reuters.com/business/autos-transportation/tesla-touts-european-supervised-self-drivin...
1•tosh•16m ago•0 comments

CampRoo – Free Camping Spots

https://camproo.com
1•aziz10101•16m ago•0 comments

FSD Supervised now approved in Slovenia

https://twitter.com/teslaeurope/status/2097007168939593780
1•tosh•17m ago•0 comments

San Francisco institution 'heartbroken and furious' after erasure of public art

https://www.sfgate.com/local/article/clarion-alley-murals-erased-22420365.php
2•mikhael•17m ago•0 comments

The auto-formalization of mathematics versus law

https://lexifina.com/blog/auto-formalisation-of-law
2•alansaber•20m ago•0 comments

SnapFire FSR: Write TypeScript. Run Rust. Ditch Node.js

https://snapfirers.com/
1•excsn•22m ago•1 comments

A fast client only protein viewer

https://github.com/buyukakyuz/protein-foldspace
2•replaski16•22m ago•0 comments

The Aviation Herald was sued – July 31st 2026

https://avherald.com/h?article=53c8958a
2•embedding-shape•23m ago•0 comments

Ancient cave art suggests first known humans in Ireland walked over from Wales

https://www.bbc.com/news/articles/c5y75dl0jpko
2•bookofjoe•24m ago•1 comments

Humpback whales are interrupting orca hunts to rescue different species

https://spacedaily.com/k-humpback-whales-are-interrupting-orca-hunts-to-rescue-completely-differe...
2•cobbzilla•25m ago•0 comments

VDN Vai Dar Namoro

https://vaidarnamoroonline.netlify.app
1•gabrielantonio•27m ago•0 comments

Bun rewrite and FLT formalization had nearly identical resource usage

3•Zsfe510asG•29m ago•1 comments

Show HN: Raw Screen Recordings into Cinematic Apple-Style Product Demos

https://isolate.video/
6•vignesh_warar•29m ago•0 comments

YC Demo Day This Thursday

https://www.neweconomies.co/p/y-combinator-summer-26-batch
1•ollieforsyth•31m ago•0 comments

Russia opens first road bridge with North Korea

https://www.dw.com/en/russia-opens-first-road-bridge-with-north-korea/a-79142595
3•everybodyknows•32m ago•0 comments

Can the U.S. afford a major war? Not with this deficit

https://www.washingtonpost.com/opinions/interactive/2026/09/07/deficit-is-biggest-threat-us-natio...
2•moat•33m ago•1 comments

Show HN: Isle – managed application environments for computer-use agents

https://www.tryisle.com
4•sxhivs•34m ago•1 comments

Show HN: Security and JSON tools that run in the browser

https://sentrint.com/tools
3•xEcho•35m ago•0 comments

The Download: the hunt for underground hydrogen and more rogue OpenAI agents

https://www.technologyreview.com/2026/09/07/1143592/the-download-underground-hydrogen-search-rogu...
3•joozio•35m ago•0 comments

Root cause analysis of the Liquid network split and 3,998.67 BTC peg-out theft

https://gist.github.com/1440000bytes/211ac92dd4433bb1a2e674bf0ff7db2e
2•binyu•36m ago•0 comments

Can AI Replace a Nevada Brothel Sex Worker?

https://brothelnevada.com/2026/09/05/ai-replace-sex-workers/
1•Teever•37m ago•0 comments