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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!

How fast can you name that tune?

https://soundofsliver.com/
1•jausto•28s ago•0 comments

Nehir: A scrolling tiling window manager for macOS

https://github.com/apphane-dev/nehir
1•fanf2•1m ago•0 comments

Free Transparent PNG Images

https://pngdex.com/
1•kanlabs•1m ago•0 comments

OpenAI agents rebuilt a secret message board after the company shut it down

https://runtimewire.com/article/exclusive-openai-agents-rebuilt-a-secret-message-board-after-the-...
2•Gosper•3m ago•0 comments

The Disintegration Loops

https://en.wikipedia.org/wiki/The_Disintegration_Loops
1•aphrax•5m ago•0 comments

Wolbachia

https://en.wikipedia.org/wiki/Wolbachia
1•inigyou•5m ago•0 comments

Silicon Valley Splits over Closing the Borders to Chinese A.I

https://www.nytimes.com/2026/07/25/technology/open-source-silicon-valley-china.html
1•Dwez•5m ago•0 comments

I Ran Out of Wanting

https://scienceisneato.substack.com/p/i-ran-out-of-wanting
2•theanonymousone•6m ago•0 comments

Star Scholar Resigns as Cambridge Announces Investigation into His Record

https://www.nytimes.com/2026/08/05/books/review/cambridge-jason-arday-resignation-investigation.html
2•JumpCrisscross•6m ago•0 comments

Proxmox officially supports Arm, with some caveats

https://www.jeffgeerling.com/blog/2026/proxmox-ve-arm-official/?
1•networked•6m ago•0 comments

Ryan, help me understand how to think about SpaceX as a business

https://messaging-custom-newsletters.nytimes.com/dynamic/render
1•doener•8m ago•0 comments

Show HN: Safety Guardrails for Claude Code

https://github.com/choiyounggi/groundwork
1•dch0202•9m ago•0 comments

Portals into Orbs

https://ampcode.com/news/portals
1•tosh•11m ago•0 comments

Polynomial-Time Quantum Algorithm Proposed for Lattice-Based Cryptography [pdf]

https://archive.cr.yp.to/2026-08-06/07:22:47/YsHY7T0pBzBPgb0dukGNgEWT5F24hHibVcr38xs7rhg/https/ep...
1•namjh•17m ago•0 comments

Everything is a UOp – reading the deep learning stack behind comma[dot]AI

https://ssenthilnathan3.github.io/blog/tinygrad/
1•nathaah3•21m ago•0 comments

Reddit is introducing new moderator:AI, also planning big changes for old Reddit

https://www.theverge.com/tech/975398/reddit-ai-rules-hub-moderator-old-reddit-developer-platform
3•Markoff•24m ago•0 comments

A requiem for Optane, Intel's KV cache killer that could have lowered RAM prices

https://www.theregister.com/storage/2026/07/29/a-requiem-for-optane-intels-kv-cache-killer-that-c...
1•rbanffy•25m ago•0 comments

Interactive Dynamic Video (2016)

https://www.youtube.com/watch?v=4f09VdXex3A
2•sinaatalay•25m ago•0 comments

Get Receipts for Your Predictions

https://lowtakes.com/
1•alfredmalmros•27m ago•0 comments

Self-driving taxis cleared for London streets 'later this summer'

https://www.theguardian.com/technology/2026/aug/05/self-driving-taxis-approved-london-summer-2026...
3•roryirvine•31m ago•2 comments

Jeff Dean: The 1% Rule for Building in AI

https://www.ycombinator.com/library/Vy-jeff-dean-the-1-rule-for-building-in-ai
1•immighelper•32m ago•0 comments

AI

https://logicandlore-236.pages.dev/
1•naccis•33m ago•2 comments

You can't have 24hour sunlight AND low altitude, low-latency orbits

https://mastodon.social/@sundogplanets/117043472890805956
2•SiempreViernes•33m ago•0 comments

Nobody Asked for AI

https://jacobin.com/2026/08/ai-llms-monopoly-bubble-capital
2•thunderbong•34m ago•0 comments

A Security Pro Hacked North Korean Hackers. He Found They'd Breached Hundreds

https://www.wired.com/story/a-security-pro-hacked-north-korean-hackers-he-found-theyd-breached-hu...
2•sbulaev•36m ago•0 comments

Nobody Wants to Burn Out Anymore

https://tim.kicker.dev/2026/02/21/nobody-wants-to-work-anymore/
2•Renewal8936•37m ago•0 comments

Google Captcha on Search, absurdities beyond belief

3•b112•38m ago•2 comments

FTI Studio, the native Windows desktop editor for the .fti image format

https://ftistudio.github.io/
1•fpsgp•39m ago•0 comments

Show HN: S3mini v1 – Tiny and fast S3 client, no-deps, for Node, Bun, Cloudflare

https://codeberg.org/thinking_tools/s3mini
2•Peter_J•40m ago•0 comments

Marmots facing money troubles turn to OnlyFans

https://www.bbc.com/news/articles/c5ywqp5z5yzo
2•1659447091•40m ago•0 comments