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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!

How to train your brain to see possibility instead of doom

https://www.theguardian.com/books/2026/apr/19/how-to-train-your-brain-to-see-possibility-instead-...
1•1659447091•1m ago•0 comments

Revocation

https://www.potaroo.net/ispcol/2026-04/revocation.html
1•aragilar•6m ago•0 comments

First Paid Subscribers on Mymarks.net

https://mymarks.net/
2•shozzipen•9m ago•0 comments

Simple Sabotage of Agents

https://alexschroeder.ch/view/2026-03-12-agent-sabotage
1•Tallain•10m ago•0 comments

AGPLv3§74 Empowers Users to Thwart Badgeware Like OnlyOffice

https://sfconservancy.org/blog/2026/apr/16/badgeware-onlyoffice-nextcloud-affero-gpl/
6•pabs3•19m ago•0 comments

I Got 122 World Records to Prove a Point [video]

https://www.youtube.com/watch?v=mVH7OPx4QZU
1•reader9274•21m ago•0 comments

French tax official sold crypto investors' addresses: kidnappings followed

https://twitter.com/MarioNawfal/status/2047773069607854512
2•MrBuddyCasino•22m ago•0 comments

Stt.ai MCP Server

https://pypi.org/project/sttai-mcp/0.1.0/
1•nadermx•33m ago•0 comments

Consumer routers hacked by Russia's military

https://arstechnica.com/security/2026/04/russias-military-hacks-thousands-of-consumer-routers-to-...
1•pabs3•37m ago•0 comments

What are some unforeseen / elusive edge cases you have seen in your career?

https://www.reddit.com/r/ExperiencedDevs/s/FIQYb1Fg8x
1•rainhacker•42m ago•0 comments

Get Free Picks Everyday. Best Sports Analysis App in Market

https://probaly.net/
1•astrofx•43m ago•0 comments

Show HN: Browse GitHub repos in Emacs without cloning

https://github.com/agzam/remoto.el
3•iLemming•49m ago•3 comments

Maine's governor vetoes data center moratorium

https://techcrunch.com/2026/04/25/maines-governor-vetoes-data-center-moratorium/
1•SilverElfin•52m ago•0 comments

All About USB-C: Resistors and Emarkers (2023)

https://hackaday.com/2023/01/04/all-about-usb-c-resistors-and-emarkers/
1•walterbell•54m ago•0 comments

I asked my local LLM to add 23 numbers and got seven wrong answers

https://viggy28.dev/article/local-llm-seven-wrong-answers/
2•vira28•56m ago•0 comments

Godot 4.7 Beta with HDR Output, Ray-Tracing Improvements and Editor Enhancements

https://www.phoronix.com/news/Godot-4.7-Beta
3•shpat•57m ago•0 comments

White House Correspondents' Dinner shooting suspect worked as California teacher

https://www.cnn.com/2026/04/26/us/white-house-correspondents-dinner-shooter-teacher-invs
3•canucker2016•57m ago•2 comments

Show HN: RewardGuard – detect reward hacking in RL training loops

https://github.com/Giovan321/Reward-Guard
1•Giovan321•58m ago•1 comments

Electric trucks in China have ditched diesel, now they're ditching the driver

https://thedriven.io/2026/04/25/electric-trucks-in-china-have-already-ditched-diesel-now-theyre-d...
2•decimalenough•1h ago•0 comments

Show HN: Track official AI company news and blogs in your Chrome side panel

https://chromewebstore.google.com/detail/bigtech-ai-news/aehmpingbppjnlppejppiifmijdjjiej
1•tughvn•1h ago•1 comments

Ask HN: Is "agentic" coding working for everyone except me?

1•canttestthis•1h ago•3 comments

Maine governor blocks first US state freeze on new data centers

https://www.reuters.com/legal/litigation/maine-governor-rejects-first-us-state-freeze-new-data-ce...
1•rmason•1h ago•0 comments

Show HN: I made a simple bill of sale maker

https://www.makebillofsale.com/
1•atharvtathe•1h ago•0 comments

What the FCC router ban means for FOSS

https://sfconservancy.org/blog/2026/apr/02/fcc-router-ban/
14•pabs3•1h ago•4 comments

MrBeast Is What Marx Warned Us About [video]

https://www.youtube.com/watch?v=-Hv-be_KdE0
7•xbmcuser•1h ago•0 comments

Show HN: I built a Shadcn based alternative to shields.io

https://github.com/jal-co/shieldcn/
1•justinlevine•1h ago•1 comments

iOS 18.7.3-18.7.6 were withheld from most devices; iOS 18.7.7 is enabled for all

https://support.apple.com/en-us/126793
4•seam_carver•1h ago•0 comments

My Homemade PBX (2002)

https://wandel.ca/homepage/pbx.html
9•rickcarlino•1h ago•0 comments

Real-time speech-to-speech translation

https://research.google/blog/real-time-speech-to-speech-translation/
1•theorchid•1h ago•0 comments

How much for a fake authorship? Ad database reveals secrets of scientific fraud

https://www.nature.com/articles/d41586-026-01340-y
2•WaitWaitWha•1h ago•0 comments