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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•11mo 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!

Stupid RCU Tricks: Corner-Case RCU Implementations

https://people.kernel.org/paulmck/stupid-rcu-tricks-corner-case-rcu-implementations
1•matt_d•26s ago•0 comments

The Future of Contact Form 7: Is the "End of Development" a Cause for Concern?

https://edel-hearts.com/contact-form-7-end-of-development/?display_lang=en
1•taubek•1m ago•0 comments

Growing List of Dead and Missing NASA Scientists Triggers New Alarm

https://www.yahoo.com/news/articles/growing-list-dead-missing-nasa-172454588.html
1•Teever•1m ago•0 comments

TLDR; an ArXiv –> Video Converter

https://manatee.work/
1•jrm-veris•3m ago•0 comments

FDA to weigh easing limits on unproven peptides favored by RFK Jr

https://apnews.com/article/peptides-fda-kennedy-injection-bpc157-37bf2f94f0e8a57da76e67a03b58ff0f
1•randycupertino•5m ago•1 comments

Lumen's risky fiber bet nearly bankrupted it. Now it's driving its AI future

https://www.cnbc.com/2026/04/15/from-near-bankruptcy-to-ai-tailwinds-lumens-high-stakes-fiber-bet...
1•cybermango•5m ago•0 comments

Farmer Arrested for Speaking Too Long at Datacenter Town Hall Vows to Fight

https://www.404media.co/farmer-arrested-for-speaking-too-long-at-datacenter-town-hall-vows-to-fight/
3•sudonanohome•6m ago•0 comments

Show HN: Jeeves – TUI for browsing and resuming AI agent sessions

https://github.com/robinovitch61/jeeves
1•lrobinovitch•6m ago•0 comments

Why Structured Data May Be AI's Next Enterprise Frontier

https://www.forbes.com/sites/ronschmelzer/2026/04/14/why-structured-data-may-be-ais-next-enterpri...
1•cpt100•6m ago•0 comments

Flock employees caught watching kids gymnastic class and pools

https://substack.com/home/post/p-193593234
3•enaaem•7m ago•1 comments

EU threatens to force Meta to restore WhatsApp full access for rival AI chatbots

https://apnews.com/article/whatsapp-meta-eu-european-union-antitrust-ai-c2b1000da61c204612b2fd2c5...
2•01-_-•7m ago•0 comments

You Can Soon Buy a $4,370 Humanoid Robot [Unitree R1] on AliExpress

https://www.wired.com/story/unitree-r1-humanoid-robot-for-sale-on-aliexpress/
2•falcor84•8m ago•1 comments

The World

https://hesnotjoking.substack.com/p/the-world-276
1•ucla_rob•9m ago•0 comments

Show HN: ZettelForge – Agentic memory for cyber threat intelligence

https://github.com/rolandpg/zettelforge
1•rolandpg•10m ago•0 comments

Drarpa – CDC sync engine with exactly-once delivery and saga orchestration (Go)

https://github.com/whispering3/Drarpa
1•dnosoz•10m ago•0 comments

Elon Musk, Who Owns X, Appears to Post on TikTok

https://www.nytimes.com/2026/04/12/technology/elon-musk-tiktok.html
2•bookofjoe•10m ago•1 comments

Sperm whales' communication closely parallels human language, study finds

https://www.theguardian.com/environment/2026/apr/15/sperm-whales-alphabet-vocalizations-similar-h...
2•mikhael•11m ago•0 comments

That Meeting You Hate May Keep A.I. From Stealing Your Job

https://www.nytimes.com/2026/04/15/business/ai-jobs-human-work.html
2•2OEH8eoCRo0•11m ago•1 comments

You cannot use the GNU (A)GPL to take software freedom away

https://www.fsf.org/blogs/licensing/agpl-is-not-a-tool-for-taking-freedom-away
2•Tomte•11m ago•0 comments

Annual exhortation: You should have millions of dollars of term life insurance

https://twitter.com/patio11/status/2044464318008508496
1•wmf•12m ago•2 comments

Africa pours $2B into controversial Chinese surveillance tech

https://restofworld.org/2026/africa-china-ai-surveillance/
2•PaulHoule•13m ago•0 comments

Microsoft: April updates trigger BitLocker key prompts on some servers

https://www.bleepingcomputer.com/news/microsoft/microsoft-some-windows-servers-ask-for-bitlocker-...
2•Brajeshwar•14m ago•0 comments

An Arm Mainboard for the Framework Laptop

https://www.jeffgeerling.com/blog/2026/arm-mainboard-for-framework-laptop/
2•ingve•14m ago•0 comments

Is anyone actually using OpenClaw?

4•misterchocolat•16m ago•2 comments

We Left the Cloud

https://basecamp.com/cloud-exit
2•talboren•16m ago•0 comments

Show HN: I built a browser idle game about training AI models

https://ai-lab-azure-pi.vercel.app
1•mmilovanovic87•16m ago•0 comments

Under the hood of MDN's new front end

https://developer.mozilla.org/en-US/blog/mdn-front-end-deep-dive/
1•hampelm•16m ago•0 comments

Metatextual Literacy

https://www.jenn.site/metatextual-literacy/
2•dado3212•19m ago•0 comments

Quitting my job to research AI software design

https://jamestimmins.com/p/quitting-my-job-to-research-ai-software-design/
1•jamestimmins•20m ago•0 comments

Turning a Chinese IoT camera into an owl livestream

https://blog.alexbeals.com/posts/owl-cam
1•dado3212•20m ago•0 comments