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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!

I have open-sourced gojaja, a CLI for local multi-agent collaboration

1•zpwsmile•2m ago•0 comments

US Supreme Court Just Blew Up EU-US Data Transfers

https://noyb.eu/en/us-supreme-court-just-blew-eu-us-data-transfers
1•tomwas54•2m ago•0 comments

Show HN: Vaghenu, a meter aware sloka-to-chant, TTS for Sanskrit

1•init0•4m ago•0 comments

Popping the GPU Bubble

https://moondream.ai/blog/popping-the-gpu-bubble
1•radq•5m ago•0 comments

Show HN: No ads and noise from any page, get a clean AI reformat in one click

https://code.intellios.ai/cwsum/
1•coolwulf•5m ago•0 comments

Ferrari's marketing boss quits after troubled EV debut

https://www.euronews.com/business/2026/06/25/ferraris-marketing-boss-quits-after-troubled-ev-debu...
2•iancmceachern•6m ago•0 comments

A Berkeley AI professor makes provocative argument for decelerating AI research

https://www.fastcompany.com/91564629/a-berkeley-ai-professor-makes-a-provocative-argument-for-dec...
1•1vuio0pswjnm7•8m ago•0 comments

The Body It Asked For – AI, hardware, and the long way back to atoms

https://saqiba.substack.com/p/the-body-it-asked-for
1•saqibanajam•9m ago•0 comments

Hollow-core fiber trial pushes 51.3 TB/s over 128mi with out signal regeneration

https://www.tomshardware.com/networking/chinas-hollow-core-fiber-trial-pushes-51-3-tb-s-over-128-...
1•giuliomagnifico•10m ago•0 comments

Nimetic – Zero-JS Single Page Applications

https://yottadb.com/nimetic-zero-js-single-page-applications-with-nim-datastar-and-yottadb/
1•archargelod•10m ago•0 comments

Qwen3.5 2B burns all the output tokens while thinking

2•adithyaharish•12m ago•0 comments

Story about Crazy Frog [video]

https://www.youtube.com/watch?v=K063gZvP5JU
2•modinfo•13m ago•1 comments

ILockBox: Offline Private Photo Vault and Video Locker

https://apps.apple.com/us/app/ilockbox-photo-vault-locker/id1064360258
1•nitingohel•15m ago•0 comments

The bats working the pollinator night shift

https://www.batcon.org/a-world-tour-of-bat-pollination/
1•gscott•18m ago•0 comments

The end of the AArch64 desktop experiment

https://marcin.juszkiewicz.com.pl/2026/06/26/the-end-of-the-aarch64-desktop-experiment/
2•signa11•28m ago•0 comments

Show HN: CI/Lock – signed evidence of what your CI ran

https://cilock.dev/
1•colek42•29m ago•0 comments

Why she have no nuance for AI [video]

https://www.youtube.com/watch?v=WDHJXDhkgUM
3•modinfo•39m ago•0 comments

An Explosion of AI Slop Is Pushing People Offline and Back into the Real World

https://www.inc.com/chris-morris/an-explosion-of-ai-slop-is-pushing-people-offline-and-back-into-...
4•1vuio0pswjnm7•44m ago•0 comments

Why Does the U.S. Still Own This Tiny Chunk of Washington Land Stuck to Canada?

https://pugetpress.com/2026/06/29/why-point-roberts-wa-isnt-part-of-canada/
4•naturalmovement•45m ago•0 comments

As a dev how do I avoid exposing IP through coding assistants?

1•dd-sharma•45m ago•1 comments

MarketNow

https://marketnow.site
1•eddyflores•47m ago•1 comments

Linux Network Performance Parameters

https://github.com/leandromoreira/linux-network-performance-parameters
1•grajmanu•49m ago•0 comments

Lawrence M. Krauss -A Universe from Nothing

https://www.youtube.com/watch?v=vwzbU0bGOdc
1•grajmanu•51m ago•0 comments

Australia's competition regulator sues Amazon over Prime subscription terms

https://www.cnbc.com/2026/06/30/australias-competition-regulator-takes-amazon-to-court-over-alleg...
4•1vuio0pswjnm7•52m ago•0 comments

AI Specialists Ready to Transform Your Workflow

https://github.com/msitarzewski/agency-agents
2•grajmanu•56m ago•0 comments

AI Data Centers Have Been Great for the Steel Industry, Now a Power Crisis Looms

https://www.wsj.com/business/energy-oil/ai-data-centers-power-competition-steel-48a17dbd
3•1vuio0pswjnm7•59m ago•0 comments

Can Architecture Ever Save Us from Sickness?

https://thereader.mitpress.mit.edu/can-architecture-ever-save-us-from-sickness/
3•the-mitr•59m ago•1 comments

ICE Tracks Down Woman to Force Her to Delete Instagram Post

https://newrepublic.com/post/212340/ice-poll-worker-election-delete-instagram-post
13•HotGarbage•1h ago•1 comments

Tracking (and predicting) the World Cup in a circle

https://www.saj.ad/2026/wc
2•dajas•1h ago•0 comments

Aera: Cross Platform Agentic Browser

https://getaera.app
2•handfuloflight•1h ago•0 comments