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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!

Cottage Computer Programming (1984)

https://www.atariarchives.org/deli/cottage_computer_programming.php
1•lioeters•4m ago•0 comments

Landmark – an algorithmic index of relevant names, unclaimed at launch

https://landmarkindex.org
1•javierqac•11m ago•0 comments

I made a free PDF Editor that runs in a browser

https://www.pdfsimplified.com/
1•sanusihassan•11m ago•1 comments

Rejected by LessWrong for "Yellow Flags"

https://zenodo.org/records/21312304
1•tintweezl•14m ago•0 comments

Digital Dispensary and Headshop

https://shop.omeweed.com/
1•mmorga71•16m ago•0 comments

HubSpot transactional email: route through your domain with MailKite – MailKite

https://mailkite.dev/blog/hubspot-transactional-email-domain/
2•gabe_karina•17m ago•0 comments

'Hysteria' Grips San Francisco's Housing Market as A.I. Wealth Pours In

https://www.nytimes.com/2026/07/08/technology/san-francisco-home-sales-openai-anthropic-ipo.html
1•1vuio0pswjnm7•18m ago•0 comments

Why Write Code in 2026

https://softwaredoug.com/blog/2026/07/09/write-code.html
7•zdw•18m ago•1 comments

the history of the human face

https://economist.com/culture/2026/07/09/the-history-of-the-human-face-is-more-than-skin-deep
2•andsoitis•27m ago•0 comments

The Work of Helping A.I. Destroy Work

https://www.nytimes.com/2026/07/10/business/ai-white-collar-jobs.html
1•thm•28m ago•0 comments

Show HN: Chameleon – shows Claude a real file from your repo before it edits

https://github.com/crisnahine/chameleon
1•crisnahine•29m ago•0 comments

Under federal rule, colleges must leave grads better off or lose financial aid

https://www.npr.org/2026/06/30/nx-s1-5835631/turner-camhi-do-no-harm-college-loans
15•nradov•33m ago•3 comments

A Captive Audience

https://seths.blog/2026/07/a-captive-audience/
2•herbertl•41m ago•0 comments

In defense of not understanding your codebase

https://www.seangoedecke.com/in-defense-of-not-understanding-your-codebase/
1•herbertl•41m ago•0 comments

Cloudflare Threatens to Cut Google Off from Their Publishers in Searches

https://www.nakedcapitalism.com/2026/07/cloudflare-threatens-to-cut-google-off-from-their-publish...
4•hackandthink•50m ago•0 comments

Show HN: Dgxtop: Rust Monitor for DGX or need to monitor GPU status

https://github.com/DennySORA/dgxtop
1•dennysora-main•51m ago•0 comments

Run Claude and Codex in the Browser [video]

https://www.youtube.com/watch?v=wgNbFRgQXwU
4•Ellis_dev•55m ago•2 comments

The Mind-Bending Company That Gets a Million Job Applications–and Rejects 99.9%

https://www.wsj.com/business/bending-spoons-jobs-hiring-stock-eaed2b8e
1•Stratoscope•57m ago•1 comments

Notion database based form builder

https://ndbforms.com/
2•nookeshkarri7•1h ago•0 comments

Martin van Creveld Interview

https://www.sonshi.com/martin-van-creveld-interview.html
1•fisheuler•1h ago•0 comments

The Entire History of Tetris Game Design

https://www.youtube.com/watch?v=mGuYUEuVDYc
1•euthymiclabs•1h ago•0 comments

Negotiating AI in Open Source Software Communities: A Case Study of LLVM Project

https://gupea.ub.gu.se/server/api/core/bitstreams/ad9b523e-f6d5-4dc2-b632-64f9734484cf/content
1•matt_d•1h ago•0 comments

What do you do when your to-do list gets out of hand?

https://www.taskloco.com/
2•taskloco_nyc•1h ago•1 comments

I built my DREAM New York City apartment from SCRATCH in 93 days [video]

https://www.youtube.com/watch?v=9hL4V3KFTKQ
1•tekacs•1h ago•0 comments

The Task Is Not the Unit of Work

https://sekoudoumbouya.com/blog/the-task-is-not-the-unit-of-work/
1•fakoli•1h ago•0 comments

Why the world is ordering buildings from China [video]

https://www.youtube.com/watch?v=qGqYaULHPV4
1•thelastgallon•1h ago•0 comments

Forward Deployed

https://andys.blog/forward-deployed/
1•andytratt•1h ago•0 comments

Why are US consumers so angry? It's not just high prices

https://www.theguardian.com/us-news/ng-interactive/2026/jun/04/us-consumer-rage-prices-economy
35•dilawar•1h ago•19 comments

Supernormal Stimulus

https://en.wikipedia.org/wiki/Supernormal_stimulus
1•thunderbong•1h ago•0 comments

TalkFitly – Practice high-EQ conversations with AI

https://apps.apple.com/us/app/talkfitly/id6776912365
1•sghick•1h ago•0 comments