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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!

Hetzner us-east, now you can get only the smallest instance (CPX11)

https://status.hetzner.com/incident/0a75c7ae-3377-41dc-aabe-601063724d24
1•gkresic•37s ago•1 comments

Self-contained Linux applications with lone Lisp

https://www.matheusmoreira.com/articles/self-contained-lone-lisp-applications
1•fanf2•2m ago•0 comments

AionDB: PostgreSQL-compatible SQL, graph, and vector database in Rust

https://aiondb.xyz/
1•ayoubnabil•4m ago•0 comments

PSVL 1.0 – The most comprehensive source-visible license (276 clauses)

https://github.com/BMBOMICH/PSVL
1•BMBOMICH•8m ago•0 comments

AutoScientist: Automating the Science of Model Training

https://www.adaptionlabs.ai/blog/autoscientist
1•sethbannon•10m ago•0 comments

Economic Futures – Anthropic

https://www.anthropic.com/economic-futures
2•gurjeet•11m ago•0 comments

2D map of 26,741M/CV papers from CVPR, NeurIPS, ICML, ICLR (2024–2025)

https://matejgazda.com/posts/paper-map.html
1•matog•12m ago•1 comments

Waiting for Website Changes in the Browser

https://alexwlchan.net/2026/livereload-in-browser/
1•ingve•14m ago•0 comments

Claude subscriptions no longer include Agent SDK and Claude -p usage

https://www.xda-developers.com/anthropics-claude-subscriptions-no-longer-include-agent-sdk-and-cl...
1•gitaarik•19m ago•0 comments

Silicon Valley Is Bracing for a Permanent Underclass

https://www.nytimes.com/2026/04/30/opinion/ai-labor-work-force-silicon-valley.html
2•imartin2k•20m ago•0 comments

Best TTS in 2026: Blind Benchmark

https://techstackups.com/articles/best-tts-2026-blind-benchmark/
1•ritzaco•20m ago•0 comments

Bun's rewrite in Rust was merged

https://github.com/oven-sh/bun/commit/23427dbc12fdcff30c23a96a3d6a66d62fdc091d
5•maxloh•25m ago•3 comments

Show HN: I built an AI travel camera because I was tired of Google Lens

https://apps.apple.com/us/app/spotter-the-travel-companion/id6761238251
1•XanMan•26m ago•0 comments

Show HN: AGEF, an open evidence format for AI agent sessions

https://github.com/radotsvetkov/agef
1•radotsvetkov•26m ago•0 comments

Solar Impulse 2 Crashes into Gulf

https://dronexl.co/2026/05/13/solar-impulse-2-crashes-gulf/
1•pingou•27m ago•0 comments

PHP RFC: Bound-Erased Generic Types

https://wiki.php.net/rfc/bound_erased_generic_types
2•choult•27m ago•0 comments

Rewrite Bun in Rust has been merged

https://github.com/oven-sh/bun/pull/30412
3•Chaoses•28m ago•1 comments

An Experimental PS1 emulator written in Zig

https://github.com/maxpoletaev/nupsx
2•Einenlum•33m ago•0 comments

People Would Rather Have Nuclear Power Plants in Their Area Than AI Data Centers

https://www.forbes.com/sites/maryroeloffs/2026/05/13/people-would-rather-have-nuclear-power-plant...
3•robtherobber•34m ago•3 comments

The gen on the family of 'vi' clones

https://jdebp.uk/FGA/vi-family.html
1•JdeBP•35m ago•1 comments

49,000 Lake Tahoe residents will lose power to data centers

https://www.shacknews.com/article/149126/lake-tahoe-residents-lose-power-data-centers
2•vrganj•37m ago•0 comments

RFV-0001: Request for Vibes

https://github.com/Request-For-Vibes/rfv
1•tomaytotomato•38m ago•0 comments

Dependency free charting library for .NET with over 40 charts, diagrams, etc.

https://github.com/EvotecIT/ChartForgeX
1•themadboy•38m ago•0 comments

Ask HN: I've been using AI for 3 years,I've lost the ability to think for myself

2•snasan•39m ago•5 comments

Gloop – A Self-Modifying AI Agent and TS Library

https://gloop.codes/
1•hypendev•41m ago•0 comments

Benchmarking Quant Backtesting Engines

https://medium.com/@DolphinDB_Inc/benchmarking-quant-backtesting-engines-dolphindb-vs-backtrader-...
1•CrazyTomato•43m ago•0 comments

BBC announces David Attenborough is returning to narrate Blue Planet III

https://themanc.com/trending/bbc-announces-david-attenborough-is-returning-to-narrate-blue-planet...
1•thunderbong•43m ago•0 comments

Dissatisfied: Three-fourths of AI customer service rollouts are a letdown

https://www.theregister.com/ai-ml/2026/05/13/ai-customer-service-bots-get-rolled-back-at-74-of-fi...
2•dijksterhuis•44m ago•0 comments

How to Pick Your Life Partner – Part 1 (2014)

https://waitbutwhy.com/2014/02/pick-life-partner.html
1•downbad_•44m ago•0 comments

Bridge Launches Computer Agent Beta

https://twitter.com/bridge_surf/status/2054600056263623046
1•Johnson8053•45m ago•0 comments