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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!

NASA's Artemis II Crew Comes Home [video]

https://www.youtube.com/watch?v=nfhDuOHMp0A
1•meetpateltech•54s ago•0 comments

AI and Cybersecurity: A Glass Half-Empty/Half-Full of Nitroglycerin

https://www.techdirt.com/2026/04/10/ai-and-cybersecurity-a-glass-half-empty-half-full-proposition...
1•hn_acker•2m ago•1 comments

Show HN: A 1KB zero-dependency relative time formatter for UI systems

https://appents.com/tech/human-time
1•hedayet•2m ago•0 comments

In-Place Test-Time Training

https://arxiv.org/abs/2604.06169
1•dgfl•3m ago•1 comments

How Many Lives Do Amber Alerts Save?

https://www.mcgill.ca/oss/article/critical-thinking-technology-history/how-many-lives-do-amber-al...
1•jprs•4m ago•0 comments

The Ancient Coding Language That 95% of ATMs Use [video]

https://www.youtube.com/watch?v=P8oc_UXgD2A
2•kerim-ca•5m ago•0 comments

Linux/Mac Alternative to Nvidia Broadcast?

https://github.com/Hkshoonya/nvidia-broadcast-linux
1•burgerguyg•6m ago•1 comments

The Great Majority: Body Snatching and Burial Reform in 19th-Century Britain

https://publicdomainreview.org/essay/the-great-majority/
1•apollinaire•10m ago•0 comments

Association of high-pillow sleeping posture w intraocular pressure in glaucoma

https://bjo.bmj.com/content/early/2026/01/22/bjo-2025-328037
2•bookofjoe•11m ago•0 comments

Building Pi in a World of Slop – Mario Zechner

https://www.youtube.com/watch?v=_zdroS0Hc74
1•swyx•13m ago•0 comments

I built an AI that teaches your slides and answers questions

https://lectura.biz
1•keniz•14m ago•0 comments

I Tried Giving an AI Agent Gmail Access. It Took 19 Steps and Still Failed

https://www.anson.im/blog/why-i-built-agentsmail/
1•beacharsiu•15m ago•0 comments

Filing the Corners Off MacBooks

https://kentwalters.com/posts/corners/
4•normanvalentine•17m ago•0 comments

Chess-Bench

https://www.chess-bench.com/
2•hardikvora•18m ago•1 comments

What's Going on in AI

https://elicit.com/blog/situational-awareness-april-2026
2•sethbannon•18m ago•0 comments

Suez Crisis

https://en.wikipedia.org/wiki/Suez_Crisis
2•softwaredoug•18m ago•0 comments

"It's rare that developers love their database that much"

https://talkingpostgres.com/episodes/how-i-went-from-oracle-to-postgres-with-a-big-nosql-detour-w...
3•clairegiordano•19m ago•0 comments

Show HN: YouTube Live Spam Blocker

https://github.com/pnhoang/youtube-spam-blocker
2•pnhoang•21m ago•0 comments

Revisiting and Optimising go-iso8601-duration

https://xnacly.me/posts/2026/revisiting-and-optimising-goiso8601duration/
2•ingve•23m ago•0 comments

Framework [Next Gen] Event is live on April 21

https://frame.work/gb/en/blog/framework-next-gen-event-is-live-on-april-21
2•ezequiel-garzon•24m ago•0 comments

French government ditching Windows for Linux in digital sovereignty push

https://www.tomshardware.com/software/windows/french-government-say-its-ditching-windows-for-linu...
4•voxadam•27m ago•0 comments

Trump administration admits a glaring error in its NY health fraud accusations

https://apnews.com/article/new-york-medicaid-fraud-dr-oz-trump-342285a3c5d5b71f36ce3f3c77ec72c5
3•petethomas•29m ago•0 comments

The Ethics of Manipulation (Revised)

https://plato.stanford.edu/entries/ethics-manipulation/
2•StatsAreFun•31m ago•0 comments

DB Explorer 3.0.1 – AI‑First SQL Editor with Schema‑Aware Query Generation

https://sourceforge.net/projects/db-explorer/
2•adeptashish•32m ago•0 comments

Installing Every* Firefox Extension

https://jack.cab/blog/every-firefox-extension
4•RohanAdwankar•37m ago•0 comments

Axios: Unrestricted Cloud Metadata Exfiltration via Header Injection Chain

https://github.com/axios/axios/security/advisories/GHSA-fvcv-3m26-pcqx
3•mhsdef•48m ago•0 comments

Higher education predicts global cultural similarity to WEIRD countries

https://www.nature.com/articles/s41467-026-70404-4
1•PaulHoule•54m ago•0 comments

The Ancient Psychedelics Myth

https://www.theguardian.com/science/2025/may/01/the-ancient-psychedelics-myth-people-tell-tourist...
3•andsoitis•54m ago•0 comments

RDW Approval of Tesla FSD in Netherlands (With Rest of EU to Follow)

https://www.rdw.nl/en/news/2026/rdw-explanation-of-european-type-approval-tesla-with-provisional-...
2•denysvitali•54m ago•1 comments

Turning the Web into a Filesystem

https://twitter.com/arlanr/status/2041215978957389908
2•gmays•55m ago•0 comments