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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!

LLM Writing and Me

https://www.makonea.com/en-US/casual/llm-writing-and-me
1•jdw64•34s ago•0 comments

Review of Marcus Hutter's Job-Less Utopia

https://borretti.me/article/review-job-less-utopia
1•thoughtpeddler•1m ago•0 comments

Deprecation of HCP Vagrant

https://developer.hashicorp.com/hcp/docs/vagrant/hcp-vagrant-eol
1•cybadger•1m ago•1 comments

AI can detect underwater waste in oceans

https://www.nature.com/articles/d44151-026-00129-2
1•wertyk•3m ago•0 comments

Tool Specifications Matter: Uncovering and Mitigating Safety Risks in AI Agents

https://arxiv.org/abs/2607.29254
2•zhinit•3m ago•0 comments

OSS ChatGPT UI v4: PDF Studio, Projects, Profiles, Server Tools, 1-Click Sharing

https://llmspy.org/docs/latest
1•mythz•4m ago•0 comments

Standalone PEP 723 scripts with Conda dependencies in Pixi

http://pixi.prefix.dev/latest/python/scripts/
1•manzt•4m ago•0 comments

We re-wrote the Excel engine in Rust to run headless for agents

https://twitter.com/peterjliu/status/2084298237884948928
3•peterjliu•6m ago•0 comments

When rogue AI launches a cyberattack, who is legally responsible?

https://www.yahoo.com/news/politics/articles/rogue-ai-launches-cyberattack-legally-011003955.html
1•pseudolus•8m ago•0 comments

I am quite tired of algorithms, so am I with Spotify; exporting playlists, etc.

https://www.ssp.sh/brain/export-spotify-data-and-music-playlists-etc/
1•zazuke•8m ago•0 comments

Taylor Farms Has Rewritten Its Cyclospora Statement Four Times in Sixteen Days

https://www.marlerblog.com/case-news/taylor-farms-has-rewritten-its-cyclospora-statement-four-tim...
3•speckx•8m ago•0 comments

Dualism

https://pluralistic.net/2026/08/03/andor/#either
1•joebuckwilliams•9m ago•0 comments

End Poverty in California

https://en.wikipedia.org/wiki/End_Poverty_in_California
1•Amorymeltzer•10m ago•0 comments

A Simpler Lambda Calculus (2019)

https://dl.acm.org/doi/pdf/10.1145/3294032.3294085
1•sargstuff•11m ago•0 comments

Kinjo: The home lab menu I wanted

https://abbyssoul.github.io/engineering/2026/08/03/kinjo-the-home-lab-menu-i-wanted.html
2•sagevoid•14m ago•0 comments

ChessTUI: Chess but via Command Line

https://github.com/gslf/ChessTUI/releases/tag/v1.0.3
2•gioeleslfierro•15m ago•0 comments

Why is it all in the kernel?

https://lawrencecpaulson.github.io/2026/07/30/Collatz.html
1•vinhnx•15m ago•0 comments

Electric air taxis are finally ready for takeoff

https://fortune.com/2026/08/03/electric-air-taxis-joby-aviation-evtols-archer-aviation/
1•ryan_j_naughton•16m ago•0 comments

Ask HN: Freelancer? Seeking freelancer? (August 2026)

1•jon_north•16m ago•1 comments

Setting Up and Using the Pi Coding Agent

https://deepakness.com/blog/pi-agent-setup/
1•speckx•18m ago•0 comments

The OpenAI Hack Shows the Genie Is Out of the Bottle

https://www.schneier.com/blog/archives/2026/08/the-openai-hack-shows-the-genie-is-out-of-the-bott...
2•herbertl•18m ago•0 comments

Show HN: Self-hosted pet diary built on Frigate and a local vision model

https://github.com/bolt12/pet-report
1•bolt012•18m ago•0 comments

How fast is C++26's std:hive?

https://lemire.me/blog/2026/08/02/how-fast-is-c26s-stdhive/
2•arto•19m ago•0 comments

Plans for nuclear-powered merchant ships must confront risks

https://www.nature.com/articles/d41586-026-02388-6
1•Brajeshwar•19m ago•0 comments

Rebuilding and analysing 4 years of Wordle stats from WhatsApp chat logs

https://blog.omgmog.net/post/rebuilding-wordle-stats-from-whatsapp/
1•surprisetalk•20m ago•0 comments

What xPal Learned Putting a Consumer Messenger Through NIST's CAVP Validation

https://xpalapp.substack.com/p/xpal-messenger-nist-cavp-validation-process
1•Brandon-Coll•21m ago•0 comments

Celebrity Art

https://seths.blog/2026/08/celebrity-art-2/
2•herbertl•22m ago•0 comments

Apple Acquiring Materials Science Company PlasmaSolve

https://www.macrumors.com/2026/08/03/apple-acquiring-plasmasolve/
1•ksec•22m ago•1 comments

Reading Matters Deeply

https://aworkinglibrary.com/writing/reading-matters-deeply
2•herbertl•24m ago•0 comments

Energy and the Matter Problem

https://fojournal.org/essay/energy-and-the-matter-problem/
1•speckx•24m ago•0 comments