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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!

This Week in Plasma: Audio Recording in Spectacle

https://blogs.kde.org/2026/07/11/this-week-in-plasma-audio-recording-in-spectacle/
1•HieronymusBosch•6m ago•0 comments

The allergy culprit histamine also boosts our memory

https://www.newscientist.com/article/2533166-the-allergy-culprit-histamine-also-boosts-our-memory/
1•XzetaU8•10m ago•0 comments

Java local AI client and MCP orchestrator without the Python dependency hell

https://ypipe.com/
1•ruoku•22m ago•0 comments

Ask HN: How are you controlling Token Costs?

1•jainojas•28m ago•0 comments

MuseAir hash: new fastest high-quality portable hashing algorithm

https://github.com/eternal-io/museair
1•eternal-io•32m ago•0 comments

SAP concedes to EU, freeing CIOs from expensive support shackles

https://www.cio.com/article/4195520/sap-concedes-to-eu-freeing-cios-from-expensive-support-shackl...
2•thibautg•32m ago•0 comments

Europe's slow electrification is a 'major mistake', warns IEA chief

https://www.ft.com/content/fbeb7df0-41fb-4981-8d78-01c7a95d3ed6
2•JumpCrisscross•35m ago•0 comments

Making a Contribution: The Story of EBR-II [video]

https://www.youtube.com/watch?v=Xf7OtFIA6LY
1•mpweiher•38m ago•0 comments

HuggingNews

https://huggingnews.com/
1•ilreb•39m ago•0 comments

Decommissioning the original Model S and X assembly line in just 46 days

https://twitter.com/gigafactories/status/2075636160508866562
1•simonebrunozzi•41m ago•0 comments

What's the best way to do authentication in modern applications

https://neciudan.dev/most-secure-way-to-store-auth-token
3•freediver•42m ago•0 comments

Open source retro futuristic pi camera

https://old.reddit.com/r/raspberry_pi/comments/1urysi6/four_months_ago_i_showed_my_retrofuturisti...
2•ludkiller•50m ago•2 comments

Show HN: KRNL – a quieter browser for the essence of the web

1•keepamovin•52m ago•0 comments

Create high-converting AI UGC ads in minutes

https://aiugcads.net/
1•mrguo•54m ago•0 comments

Show HN: Krbn, a pencil-style 3D renderer with SVG output

https://github.com/vpalos/Krbn
2•vpalos•1h ago•0 comments

The Metaphysics (350 BCE)

https://classics.mit.edu/Aristotle/metaphysics.1.i.html
1•andsoitis•1h ago•0 comments

Meta Deletes Face-Recognition System from Smart Glasses App After Wired Report

https://www.wired.com/story/meta-removes-face-recognition-code-meta-ai-app-smart-glasses/
1•1vuio0pswjnm7•1h ago•0 comments

Hasharot – Control a Claude Code agent on your machine from Telegram

https://github.com/Mamasodikov/hasharot
1•mamasodikov•1h ago•0 comments

Why Rodents Can't Throw Up, in Case You Were Wondering

https://www.smithsonianmag.com/smart-news/why-rodents-cant-throw-up-in-case-you-were-wondering-25...
1•thunderbong•1h ago•1 comments

Show HN: isitsecure - 1-command SAST & DAST & LLM security scanner for web apps

https://github.com/jaurakunal/isitsecure
2•kunaljaura•1h ago•0 comments

The Conversation We're Not Having About AI in Peer Review

https://cabird.com/ide/posts/ai-in-peer-review
1•azhenley•1h ago•0 comments

Why is (the word game) Lingo 'lightning in a bottle'? (2026)

https://icely.neocities.org/articles/lingo-lightning-in-a-bottle
1•icely•1h ago•0 comments

Parents' Phone Addiction Affects Bond with Kids, New Study Finds

https://www.bloomberg.com/news/articles/2026-07-08/parents-phone-addiction-affects-bond-with-kids...
1•1vuio0pswjnm7•1h ago•0 comments

Show HN: River Rescue – Game mechanic for 3yo

https://www.pip.quest/
1•satellite2•1h ago•2 comments

Crypto Criminal Accused of Crypto Crimes Again, While in Jail

https://www.bloomberg.com/news/articles/2026-07-09/crypto-criminal-accused-of-crypto-crimes-again...
1•1vuio0pswjnm7•1h ago•0 comments

Self-replicating spacecraft, a.k.a. von Neumann probes

https://en.wikipedia.org/wiki/Self-replicating_spacecraft
1•gurjeet•1h ago•0 comments

Depone – Delete legacy require_once with proof, not guesswork

https://github.com/lll-lll-lll-lll/depone
2•www_lll•1h ago•0 comments

AI Limit, Social Divide

https://valand.dev/blog/post/ai-limit-divide
1•valand•1h ago•0 comments

Nectar: A programming language that compiles to WebAssembly

https://github.com/HibiscusConsulting/nectar-lang
2•handfuloflight•1h ago•0 comments

Vermont becomes first US state to ban paraquat herbicide over Parkinson's fears

https://www.theguardian.com/environment/2026/may/26/vermont-paraquat-weedkiller-ban
3•xoa•1h ago•0 comments