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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!

Show HN: Dragonfly – an API client that understands your Express/Next.js routes

https://www.usedragonfly.xyz
1•saurowankhade•35s ago•0 comments

ADIE – Beyond Prediction. Toward Verifiable Decisions

https://robertbudai.github.io/adie-website/
1•DIXOR•1m ago•0 comments

An update on how we confirm your age group on Discord

https://discord.com/blog/safer-for-teens-same-discord-for-adults
1•meetpateltech•2m ago•0 comments

Linux at Long Last and GPLv3

https://obscura.com/blog/linux-at-long-last/
1•Cider9986•3m ago•0 comments

Denuvo sues discord user for breaking DRM to games that they didn't make [video]

https://www.youtube.com/watch?v=62exWJmTaXg
1•Cider9986•3m ago•0 comments

I Changed My Mind About AI Risk

https://www.persuasion.community/p/why-i-changed-my-mind-about-ai-risk
1•mooreds•3m ago•0 comments

The Rise and Fall of Tech Worker Power

https://www.bostonreview.net/articles/the-rise-and-fall-of-tech-worker-power/
1•mooreds•4m ago•0 comments

Ask HN: Honey Pots in 'who wants to be hired'?

1•jwally•4m ago•0 comments

Betel nuts are a top mind-affecting substance. There's evidence of ancient use

https://text.npr.org/g-s1-144054
1•mooreds•4m ago•0 comments

LiveCrew – a persistent AI exec team that argues back (with receipts)

https://www.livecrew.tech/
1•shamil_b•4m ago•0 comments

Jev Creator: System One Models for Prod, Not God [video]

https://www.youtube.com/watch?v=cFx9Z3ZXca0
1•Anon84•4m ago•0 comments

Show HN: RUUN – Tor Browser with a second, non-Tor mode in the same app

https://gitlab.com/varad_7/ruun
1•opentestudox07•6m ago•0 comments

Ask HN: Which is cheaper: ChatGPT tokens or a 2nd Pro 20x subscription?

2•yesitcan•7m ago•0 comments

Untangling Lifetimes – Arena Allocators in C

https://www.dgtlgrove.com/p/untangling-lifetimes-the-arena-allocator
1•eliasebner•7m ago•0 comments

Nano Banana 2.5: Faster, Better AI Images

https://nanobanana25ai.net
1•yoxi1•8m ago•0 comments

Fast-CLI: CLI tool written in Zig for testing internet speed

https://github.com/mikkelam/fast-cli
1•hoyd•8m ago•0 comments

Sauna Jungle Expansion

https://www.saunajungle.com/
1•hubears•9m ago•0 comments

GPT-6 Sol and Luna

https://openai.com/index/introducing-gpt-6-sol-and-luna/
113•OfficialTurkey•12m ago•34 comments

Cookie started its life as a plastic bottle

https://www.acs.org/pressroom/presspacs/2026/august/this-cookie-started-its-life-as-a-plastic-bot...
1•dustfinger•13m ago•0 comments

GPT-6 Sol

https://developers.openai.com/api/docs/models/gpt-6-sol
6•sfkgtbor•14m ago•1 comments

Arguing about Arguments

https://steveklabnik.com/writing/arguing-about-arguments/
2•birdculture•14m ago•0 comments

Delaying all JavaScript doesn't make your site faster

https://michalek.blog/blog/delay-all-javascript
1•absolutmachal•14m ago•1 comments

It's Hard to Learn from Machines

https://carlkolon.com/2026/09/22/learning-from-machines/
1•cckolon•18m ago•0 comments

U.S. Climate Collection

https://usclimatecollection.org
3•Tomte•19m ago•0 comments

Prominent art therapist quoted by Vice, Forbes and others is AI-generated

https://pressgazette.co.uk/news/prominent-art-therapist-quoted-by-vice-forbes-and-others-is-ai-ge...
1•ilamont•19m ago•0 comments

Vibe code what prints money

https://buildradar.leapd.ai
2•javeedshah•19m ago•1 comments

OpenCode removed usage transparency after a billing bug was reported

https://github.com/anomalyco/opencode/issues/39822
2•bigprof•20m ago•0 comments

Reviewing Your Blog Post with an LLM

https://writethatblog.substack.com/p/reviewing-your-blog-post-llm
1•cyndunlop•22m ago•1 comments

My Weird New Hobby: Wandering Around Tokyo on Google Maps

https://ahmedhossamdev.com/writing/my-weird-new-hobby-wandering-around-tokyo/
3•ahmedhossamdev•23m ago•0 comments

U.S. Site Blocking Bill Adds VPNs to the List of Blocking Intermediaries

https://torrentfreak.com/u-s-site-blocking-bill-adds-vpns-to-the-list-of-blocking/
3•Cider9986•23m ago•0 comments