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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!

Age of Riot

https://age-of-riot.pages.dev/
1•pjerem•13s ago•0 comments

For an affordable climate win, look to the sky

https://www.gatesnotes.com/for-an-affordable-climate-win-look-to-the-sky
1•oliculipolicula•2m ago•0 comments

Elephant-Goldfish Model

https://egm.dev/
1•ruidlopes•3m ago•1 comments

John Snow Cholera Data

https://johnsnow.rtwilson.com/
1•surprisetalk•4m ago•0 comments

Agentic Workflows: The workflow was there

https://joebew42.github.io/2026/10/15/agentic-workflows-the-workflow-was-already-there/
1•joebew42•6m ago•0 comments

Flexbox Froggy – A game for learning CSS Flexbox

https://flexboxfroggy.com/
2•masfuerte•7m ago•0 comments

Demis Hassabi- AI's Deepest Mind Believes the World Is About to Change Radically

https://www.wsj.com/tech/ai/demis-hassabis-ai-deepmind-google-isomorphic-2b4e3153
1•pseudolus•8m ago•1 comments

Airtable Was Acquired by Bending Spoons: What to Do First

https://www.atmigrator.com/blog/airtable-acquired-by-bending-spoons-what-to-do
1•saud_c•12m ago•0 comments

Baryum – a first-person space SIM set in the real solar system at true scale

https://store.steampowered.com/app/4989230/Baryum/
1•dams-labs•12m ago•0 comments

The Ambiguous State Trap: Why I Disabled Claude's Auto-Memory

https://huggingface.co/blog/dacorvo/the-ambiguous-state-trap
1•dacorvo•14m ago•0 comments

The AI industry's gigantic debts are making investors nervous

https://www.economist.com/business/2026/10/18/the-ai-industrys-gigantic-debts-are-making-investor...
2•ludovicianul•14m ago•0 comments

A Rant About APIs

https://www.cryptocracy.com/blog/2026/10/10/a-rant-about-apis/
1•baseonmars•14m ago•0 comments

Precog – Control your Mac with hand gestures via the webcam

https://github.com/lulu38m/precog-macos
1•luluberlulu•16m ago•0 comments

A Calendar of Smells

https://worldsensorium.com/a-calendar-of-smells/
1•dnetesn•17m ago•0 comments

Show HN: Multiplayer AI

https://synteny.vercel.app/
1•infiter•17m ago•0 comments

State of PaaS and Web Hosting 2026: market benchmark and cost analysis

https://cloudcompare.dev/reports/state-of-paas-and-web-hosting-2026-market-benchmark-and-cost-ana...
1•atmeszaros•17m ago•0 comments

Show HN: Photonica – Film looks for your photos, processed locally with WebGPU

https://photonica.studio/app/
1•topvlad•17m ago•0 comments

We are raining spacecraft into the ocean

https://blue-continuum.com/the-spacecraft-cemetery
1•dnetesn•18m ago•0 comments

Architecture Decision Record: now in many more languages

1•jph•21m ago•0 comments

The Unneeded – A book about why AI job losses will come all at once

https://zenodo.org/records/23489856
1•Ian_Komunidad•23m ago•0 comments

Show HN: Commit code into a neural network, see what it remembers (browser demo)

https://nicobrenner.github.io/lossy-git/demo.html
1•nico•23m ago•0 comments

The Abdication of the Software Engineer

https://yadv.in/posts/abdication-of-the-software-engineer/
4•rohityadavcloud•23m ago•0 comments

Getty Images files for US bankruptcy, advances restructuring plan

https://www.reuters.com/legal/litigation/getty-images-files-us-bankruptcy-advances-restructuring-...
9•ilamont•27m ago•0 comments

Relativty: Open-source VR headset with SteamVR support (2023)

https://github.com/relativty/relativty
1•raffael_de•27m ago•0 comments

Hackers steal children's data after company used 'Passwords' to protect account

https://www.bbc.com/news/articles/cwyegl8q80do
1•choult•28m ago•0 comments

Because most users do not use dates before March 1, 1900, this problem is rare

https://unsung.aresluna.org/because-most-users-do-not-use-dates-before-march-1-1900-this-problem-...
3•kqr•30m ago•1 comments

Show HN: Qovilio – an AI that reads your bills and lists your subscriptions

https://qovilio.com/
2•Mazi__•31m ago•0 comments

Pentagon grants DHS permission to test heat ray weapon

https://www.cnn.com/2026/10/21/politics/heat-ray-weapon-dhs-pentagon
3•xhevahir•33m ago•0 comments

25years of CrimeStoppers Tips to Police Leaked

https://www.cbc.ca/news/investigates/canadian-crime-stoppers-tips-leaked-hack-investigation-9.738...
7•sandworm101•34m ago•0 comments

Qev-0.8B · New SOTA tiny local decision model

https://app.labqoat.com/e/qev/qev/
8•dawidkielbasa•35m ago•0 comments