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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•10mo 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!

A woman's uterus has been kept alive outside the body for the first time

https://www.technologyreview.com/2026/03/28/1134766/womans-uterus-kept-alive-outside-the-body-first/
1•joozio•4m ago•0 comments

I put all 8,642 Spanish laws in Git – every reform is a commit

https://github.com/EnriqueLop/legalize-es
1•enriquelop•5m ago•1 comments

Human neurons on a chip learned to play Doom

https://www.scientificamerican.com/article/how-human-neurons-on-a-chip-learned-to-play-doom/
1•Brajeshwar•5m ago•0 comments

How are you handling web scraping at scale without getting blocked?

https://meshscrape.com/
1•Viktor_5togrow•6m ago•0 comments

Quantum Control Plane

https://github.com/mareksuchodolski12-hash/kwantowy
1•ProEloElo•10m ago•0 comments

Grove: Distributed ML Training Across MacBooks

https://github.com/swarnim-j/grove
1•hasheddan•11m ago•0 comments

Tmate.io is Shut Down...

https://github.com/tmate-io/tmate/issues/322
1•pvtmert•11m ago•0 comments

In an Asymmetrical War, Iran Seeks an Edge with Its Information War

https://www.nytimes.com/2026/03/28/business/iran-propaganda-war-ai.html
1•mitchbob•11m ago•1 comments

Visuali (Updated): A workspace to create and edit with AI on a infinite canvas

https://visuali.io
3•visuali•12m ago•0 comments

Study explains Antarctic sea ice growth and sudden decline

https://phys.org/news/2026-03-antarctic-sea-ice-growth-sudden.html
2•Brajeshwar•16m ago•0 comments

I Built an Open-World Engine for the N64 [video]

https://www.youtube.com/watch?v=lXxmIw9axWw
2•msephton•17m ago•1 comments

Fired from Warhorse Studios and Replaced with AI

https://old.reddit.com/r/kingdomcome/comments/1s5vgt9/other_fired_from_warhorse_studios_and_repla...
1•jzig•23m ago•0 comments

The new way to manage Private Equity Funds

https://rockvault.io/
1•rakanalalami•23m ago•1 comments

Show HN: 2MB FOSS Nav App with GPX Tracking

https://github.com/CompassMB/MBCompass/releases/tag/v1.1.13
1•nativeforks•27m ago•0 comments

Semiont: Build a Knowledge Base Collaboratively with AI

https://the-ai-alliance.github.io/semiont/
1•argee•28m ago•1 comments

Zsh-patina: A fast Zsh syntax highlighting plugin (written in Rust)

https://github.com/michel-kraemer/zsh-patina
1•michel-kraemer•32m ago•0 comments

Fastbelt: The high-speed DSL toolkit for Go

https://www.typefox.io/blog/fastbelt-introduction/
3•spoenemann•35m ago•0 comments

What Is YouTube's Dominance Doing to Us? We Asked Its CEO

https://www.nytimes.com/2026/03/28/magazine/neal-mohan-interview.html
1•pretext•35m ago•0 comments

Gaza toddler released from Israeli custody with 'cigarette burn' wounds

https://www.middleeasteye.net/news/gaza-toddler-released-israeli-custody-cigarette-burn-wounds
4•ghd_•41m ago•0 comments

From the TI-57 to AI: A Veteran's Methodology for "Not Vibe Coding"

https://github.com/tchoa91/RSSext/discussions/2
3•tchoa91•41m ago•0 comments

Show HN: Substrate UI, my "teaching myself front end development" design system

https://www.substrateui.dev/
1•MikeNotThePope•43m ago•0 comments

The Age Verification Con

https://reclaimthenet.org/the-age-verification-con
2•bilsbie•43m ago•0 comments

Computers, Geometry and Einstein – Jason Lotay (Oxford Mathematics) [video]

https://www.youtube.com/watch?v=3NCbEbopMj8
1•vismit2000•43m ago•0 comments

FruitsGrid Japanese Puzzle Game

https://www.fruitsgrid.com/
1•code-less•47m ago•0 comments

Oppo made the best foldable phone, again

https://www.theverge.com/tech/901846/oppo-find-n6-review-crease-screen-specs-price
1•dkobia•49m ago•0 comments

Architecture Decision Record

https://martinfowler.com/bliki/ArchitectureDecisionRecord.html
2•BerislavLopac•52m ago•0 comments

No one is happy with NASA's new idea for private space stations

https://arstechnica.com/space/2026/03/what-happens-next-with-nasas-plan-to-replace-the-iss-source...
8•rbanffy•53m ago•1 comments

Introduction to Nyreth v1.0 [video]

https://www.youtube.com/watch?v=cQvCFmfjJLA
1•NyrethAI•56m ago•0 comments

Scaling a Monolith to 1M LOC: 113 Pragmatic Lessons from Tech Lead to CTO

https://www.semicolonandsons.com/articles/scaling-a-monolith-to-1m-loc-113-pragmatic-lessons-from...
1•dondraper36•58m ago•0 comments

Looking for honest feedback on Entry I – a physical artifact

https://www.indiehackers.com/post/looking-for-honest-feedback-on-entry-i-a-physical-artifact-that...
1•Entryi•59m ago•0 comments