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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!

Kimi 2.7 Code: 1T model with 1000 tokens per second

https://www.lithosai.com/
1•rthng•15s ago•0 comments

Lovable: Connect your app to GitHub API

https://docs.lovable.dev/integrations/github-api
1•doener•3m ago•0 comments

Bringing Nebula connectivity to everyone with free managed lighthouses

https://www.defined.net/blog/announcing-managed-lighthouses/
1•radlad•5m ago•0 comments

Why do mosquitoes bite some people more than others?

https://www.bbc.com/future/article/20260708-why-do-mosquitoes-bite-some-people-more-than-others
2•reconnecting•7m ago•0 comments

Postcard from Paris: joining the party brigade at the Firefighters' Ball

https://www.ft.com/content/bd07af81-e0e9-458d-9b08-7c8837fb18f9
1•coloradoave22•8m ago•0 comments

Migrating from GitLab to Forgejo

https://www.bentasker.co.uk/posts/blog/software-development/migrating-from-gitlab-to-forgejo.html
1•speckx•8m ago•0 comments

The Chud Vision of Roman History

https://acoup.blog/2026/07/10/friday-friday-july-10-2026-on-the-chud-vision-of-roman-history/
1•Tomte•9m ago•0 comments

What Every Python Developer Should Know About the CPython ABI

https://labs.quansight.org/blog/python-abi-abi3t
1•ngoldbaum•10m ago•0 comments

Chatbots Can Go into a Delusional Spiral. Here’s how it happens.

https://www.nytimes.com/2025/08/08/technology/ai-chatbots-delusions-chatgpt.html
1•Anon84•13m ago•0 comments

CatchCat – Pokémon Go for Cats, IRL

https://www.catchcat.lol/
1•marojejian•13m ago•1 comments

The Future of Meta Superintelligence

https://newsletter.semianalysis.com/p/the-future-of-meta-superintelligence
1•shadowtree•14m ago•0 comments

It will be as if it has always been this way

https://utf9k.net/blog/it-will-be-as-if-it-has-always-been-this-way/
1•speckx•14m ago•0 comments

Marketing tool for small businesses test

https://turfmark.vercel.app/
1•Mini_dev•18m ago•0 comments

Students investigate rubber duck shops in Amsterdam: is there money laundering?

https://www.parool.nl/international/students-investigate-rubber-duck-shops-in-amsterdam-is-there-...
1•theanonymousone•19m ago•0 comments

Show HN: GenUI, native SwiftUI interfaces generated by AI agents

https://github.com/kiliczsh/genui
1•kilic•20m ago•0 comments

OnCue

https://oncue.thelettertwo.com/
2•kyeung808•21m ago•0 comments

Show HN: Veritas – 94 recurring truths found across cultures

https://www.chestergrant.com/7-truths-from-veritas-by-chester-grant
2•chegra•21m ago•0 comments

Works and Days

https://emersoncentral.com/essays/works-and-days/
1•danhdsss•23m ago•0 comments

Show HN: Csviz – turn a CSV into a shareable dashboard, not a chat reply

https://csviz.netlify.app
1•mecharan14•23m ago•0 comments

'Music was my first desire': Anthony Hopkins releases his debut single

https://www.theguardian.com/music/2026/jul/10/music-was-my-first-desire-anthony-hopkins-releases-...
1•ohjeez•24m ago•0 comments

The Download: Claude's inner workings and OpenAI's "super app"

https://www.technologyreview.com/2026/07/10/1140316/the-download-anthropic-claude-hidden-space-op...
1•joozio•27m ago•0 comments

Chat Control 1.0 has been passed

https://gerarddupre.dev/en/blog/chat-control-1-passed/
3•polloRebozado•27m ago•0 comments

You're Not a Better Engineer Because You Type Git Commands by Hand

https://www.minid.net/2026/7/10/ai-works-for-me
6•meerita•28m ago•0 comments

A Guide to Terraform Secrets Management

https://infisical.com/blog/terraform-secrets-management
2•FinnLobsien•28m ago•0 comments

Collaboration Networks in Brazilian Computer Science

https://blog.ptidej.net/collaboration-networks-in-brazilian-computer-science/
1•aliiiimaher•29m ago•1 comments

The World of Tomorrow: The Principles of International Federalism [pdf]

https://cosmosandtaxis.org/wp-content/uploads/2022/09/nientiedt_ct_vol10_iss11_12.pdf
1•brandonlc•29m ago•0 comments

Anyone else get a vague GitHub shakedown notice?

https://lists.osgeo.org/pipermail/qgis-developer/2026-July/068430.html
3•jjgreen•31m ago•1 comments

Why don't schools teach debugging? (2014)

http://danluu.com/teach-debugging/
2•bmacho•32m ago•0 comments

Why It's So Hard to Break John Deere's Control over Farming

https://www.thebignewsletter.com/p/youll-own-nothing-and-be-happy-why
3•toomuchtodo•35m ago•2 comments

I spent a week using the Trump phone – it sucks

https://www.theverge.com/tech/963382/trump-mobile-t1-phone-review
3•sphars•37m ago•1 comments