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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!

Apple settles lawsuit admitting Apple Intelligence isn't here yet

https://www.reuters.com/legal/litigation/apple-settles-lawsuit-over-late-siri-ai-features-250-mil...
2•oofbey•2m ago•0 comments

Show HN: I Built a Retro Survival RPG in Vanilla JavaScript

1•jasonkester•3m ago•0 comments

Behavior-Oriented Concurrency for Python

https://microsoft.github.io/bocpy/
2•mpweiher•4m ago•0 comments

Attackers are cashing in on fresh 'CopyFail' Linux flaw

https://www.theregister.com/2026/05/05/cisa_sounds_the_alarm_on/
2•pjmlp•14m ago•0 comments

The Schneider float32 byte order isn't in the spec, and other Modbus surprises

https://gist.github.com/PhilYeh1212/227a35b12236f1f37dfea0405b12be2b
2•PhilYeh75•17m ago•0 comments

Generative UI Browser

https://github.com/manupareekk/generative-ui-browser
1•manupareek•19m ago•0 comments

You built the product. Now test if people want it

https://www.viral.ad/
2•cjdesignstudio•23m ago•0 comments

Knitting Bullshit

https://katedaviesdesigns.com/2026/04/29/knitting-bullshit/
3•ColinEberhardt•24m ago•0 comments

Why LLM APIs Shouldn't Ship UTF-8", "Stop Wasting Bandwidth on LLM Text APIs

https://github.com/wdunn001/codec
2•Zombwaffle•26m ago•0 comments

CLI2API: Turn Your Claude Subscription into an OpenAI-Compatible API

https://github.com/zhusq20/CLI2API
1•zsqzz•26m ago•0 comments

An ode to swapping computer warez in the 80s

https://suno.com/song/79267d82-c558-4981-a7e5-3b0a7939dea9
1•JPolka•27m ago•2 comments

Software Development Job Postings on Indeed in the United States

https://fred.stlouisfed.org/series/IHLIDXUSTPSOFTDEVE
1•stefap2•28m ago•0 comments

Pyramid of the Capitalist System (1911)

https://publicdomainreview.org/collection/pyramid-of-the-capitalist-system/
2•prismatic•28m ago•0 comments

Show HN: App that marks each hour of your day as yours or lost to your phone

https://apps.apple.com/us/app/oh-my-hours/id6760450002
1•yarsanich•29m ago•0 comments

OpenAI favors more flexible datacenter deals

https://www.tomshardware.com/tech-industry/artificial-intelligence/openai-has-effectively-abandon...
1•gmays•29m ago•0 comments

Detection of an atmosphere on a trans-Neptunian object beyond Pluto

https://www.nature.com/articles/s41550-026-02846-1
1•tobr•31m ago•0 comments

Verification Test – Please Ignore

1•zhoykn•34m ago•0 comments

Inventing Cyrillic

https://www.historytoday.com/archive/history-matters/inventing-cyrillic
3•lermontov•36m ago•0 comments

The Trail of Jeremiah

https://theamericanscholar.org/on-the-trail-of-jeremiah/
2•samclemens•37m ago•0 comments

My Claude Code Setup: Pure CLI, Pure Unix, Zero IDE

https://sindro.me/posts/2026-04-09-claude-code-pure-cli-setup/
2•stare_spb•38m ago•0 comments

What Produce Is in Season Today

https://fliprank.app/discover/in-season-produce
3•akest•49m ago•0 comments

Scripty – A Minimal Scripting Language

https://kristoff.it/blog/scripty/
3•anitil•51m ago•1 comments

Ghidra Decompiler in the Browser

https://github.com/ant4g0nist/pyre
1•rmast•54m ago•0 comments

Show HN: How smart is your geography knowledge?

https://map.mikira.id/
1•hockyy•54m ago•0 comments

Multi-stroke text effect in CSS

https://yuanchuan.dev/multi-stroke-text-effect-in-css
2•cheeaun•55m ago•0 comments

Google has a secret reference desk

https://cardcatalogforlife.substack.com/p/google-has-a-secret-reference-desk
7•maxutility•58m ago•1 comments

Myst (Cyan, 1991) Game Proposal document

https://archive.org/details/myst_proposal
3•memalign•1h ago•0 comments

Apple agrees to pay iPhone owners $250M for not delivering AI Siri

https://www.theverge.com/tech/924706/apple-iphone-siri-intelligence-class-action-lawsuit-settlement
6•Garbage•1h ago•0 comments

GPT‑5 derived new results in theoretical physics and quantum gravity [video]

https://www.youtube.com/watch?v=9d899Ram9Bs
2•AtomicOrbital•1h ago•0 comments

Cleartext Passwords in MS Edge? In 2026?

https://isc.sans.edu/diary/32954
4•taubek•1h ago•0 comments