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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•11mo 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!

Show HN: HN I build an automation that back my Claude chat to a ticketing system

1•xnslx•36s ago•0 comments

Free paycheck calculator for all 50 US states

https://takehometool.com/
1•ahcstudio•1m ago•0 comments

Show HN : Tickword – Chain the words. Dont let the clock catch you

https://tickword.com/en
1•Jekooo•3m ago•1 comments

Intuitive Understanding of PCA

https://ai.ragv.in/posts/intuitive-understanding-of-pca/
1•kn81198•5m ago•0 comments

Why on-chain options are still thin (and a liquidity model that fixes it)

https://rohanrathod.ai/writing/on-chain-options-liquidity
1•ro_lend•7m ago•0 comments

Late pregnancy is pretty bizarre

https://viverricious.substack.com/p/late-pregnancy-is-pretty-bizarre
1•eatitraw•8m ago•0 comments

Predicting the Future (2001) [pdf]

https://library.rumsfeld.com/doclib/sp/2382/2001-04-12%20To%20George%20W%20Bush%20et%20al%20re%20...
1•pollorollo•8m ago•0 comments

Admin Console Inaccessible – Tailscale Status

https://status.tailscale.com/incidents/01KQ8HC1B4KG94AMB39DD9F0FJ
1•corvad•9m ago•0 comments

How My RLM Tool Works

https://isaacflath.com/writing/rlm
1•simonpure•9m ago•0 comments

Taming the Unpredictable: Reliability in Chaos (Srecon 26)

https://www.usenix.org/conference/srecon26americas/presentation/brush
1•captainkrtek•9m ago•0 comments

Why stablecoins are making many banks nervous

https://www.marketplace.org/story/2026/04/27/why-stablecoins-are-making-many-banks-nervous
1•petethomas•12m ago•0 comments

A common weed killer left an epigenetic footprint in early-onset colon cancer

https://medicalxpress.com/news/2026-04-common-weed-killer-left-hidden.html
4•SilverElfin•12m ago•1 comments

We tested 7,039 sites for MCP support; 5.8% passed a live handshake

https://8bitconcepts.com/research/q2-2026-mcp-ecosystem-health.html
1•8bitconcepts•14m ago•0 comments

Extended interview: Ben Sasse on lessons for America [video]

https://www.youtube.com/watch?v=WcT9O5Sjmd0
1•duck•19m ago•0 comments

Solar exports 2x during Oil Crisis

https://e360.yale.edu/digest/china-solar-exports-iran-war
2•dreadsword•28m ago•0 comments

AI is confronting a supply-chain crunch

https://www.economist.com/business/2026/04/27/ai-is-confronting-a-supply-chain-crunch
1•edward•28m ago•0 comments

Nirvanic AI

https://www.nirvanic.ai
1•a_poo_on_a_shoe•29m ago•0 comments

Elephants, Goldfish and the New Golden Age of Software Engineering

https://drensin.medium.com/elephants-goldfish-and-the-new-golden-age-of-software-engineering-c336...
1•krish98sai•29m ago•0 comments

WallasAPI: Multi-provider AI router with automatic fallback (12 providers)

https://github.com/wubjak/wallasapi
1•wubjak•40m ago•0 comments

Open Museum – an MCP server for license-verified search across museums

https://github.com/cfpramod/open-museum-mcp
1•pramodprasanth•41m ago•1 comments

Pip 26.1 Released

https://lwn.net/Articles/1070010/
2•kazu11max17•42m ago•0 comments

AI researchers want AI to fake "thinking"

https://www.machinesociety.ai/p/ai-researchers-want-ai-to-fake-thinking-247
2•mikelgan•45m ago•1 comments

Initial tests find lead in children's fast-fashion clothing

https://www.acs.org/pressroom/presspacs/2026/march/initial-tests-find-lead-in-childrens-fast-fash...
1•_DeadFred_•46m ago•0 comments

I build my LLM a Brain

1•Kevintbt•46m ago•1 comments

I ran retrieval-auditor against LangChain's RAG quickstart, 5/6 flagged

https://github.com/kevin-luddy39/contrarianAI/tree/main/tools/retrieval-auditor/examples/langchai...
1•kevinluddy39•46m ago•0 comments

A Disappearing JSX Framework

https://twitter.com/dashersw/status/2048719900013732232
1•arbayi•46m ago•0 comments

Show HN: Need Human Lawyer – when AI for legal work isn't enough

1•fcpguru•49m ago•0 comments

Claude Pro: Opus model will only be available if extra usage is enabled

https://support.claude.com/en/articles/11940350-claude-code-model-configuration
6•yrds96•51m ago•3 comments

Show HN: Memory Guardian – open-source memory governance for AI agents

https://github.com/rishipratap10/memory-guardian
2•rishipratap10•52m ago•1 comments

Notes on structured concurrency, or: Go statement considered harmful (2018)

https://vorpus.org/blog/notes-on-structured-concurrency-or-go-statement-considered-harmful/
1•shadow28•55m ago•0 comments