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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!

Agile Design and Implementation of a Systolic Array-Based CNN Accelerator (2024) [pdf]

https://www.ijerm.com/download_data/IJERM1103012.pdf
1•peter_d_sherman•3m ago•0 comments

The computer use verification skill that every agent needs

https://twitter.com/zachlloydtweets/status/2084411777354277027
1•gmays•4m ago•0 comments

Show HN: Self-hosted tunnels: local directory/port, your domain, HTTPS, passkeys

https://github.com/schappim/mygrok
1•schappim•5m ago•0 comments

iCloud+ Hide My Email addresses will remain on icloud.com

https://developer.apple.com/news/?id=1ptvdtcm
4•K7PJP•7m ago•0 comments

Supreme Court Allows Trump Plan to Restrict Mail-In Voting, for Now

https://www.nytimes.com/2026/08/24/us/politics/supreme-court-trump-mail-ballots.html
1•mikhael•7m ago•0 comments

France readies high school phone ban for new term

https://www.lemonde.fr/en/france/article/2026/08/24/france-readies-high-school-phone-ban-from-new...
2•geox•11m ago•0 comments

Life Policies Shouldn't Be Funding the Boss's Trophy Assets

https://www.bloomberg.com/opinion/articles/2026-08-24/life-policies-shouldn-t-be-funding-the-boss...
1•petethomas•11m ago•0 comments

Show HN: My friend built a Gleam server – let's try to take it down

https://kms.andrewpavlov.org/
1•harakternik•12m ago•0 comments

Trump Admin Moves to Impose More Than $100K Fee for H-1B Worker Visas

https://sg.news.yahoo.com/trump-administration-moves-impose-more-131727979.html
3•dsmark•13m ago•1 comments

MetaRoCE: A New RDMA Transport Built for AI-Scale Ethernet

https://engineering.fb.com/2026/08/24/networking-traffic/metaroce-rdma-transport-ai-ethernet/
2•sbulaev•14m ago•0 comments

Moon

https://ciechanow.ski/moon/
3•simonebrunozzi•15m ago•0 comments

AI text watermarking and quality loss

https://blog.keyvan.net/p/ai-text-watermarking-and-quality
1•k1m•15m ago•0 comments

See what your content is worth to AI agents

https://index.parallel.ai/
1•martialg•15m ago•0 comments

Vector search in PostgreSQL: deduplicating speakers with pgvector and HNSW

https://rvier.fr/posts/deduplicating-speakers-with-pgvector-and-hnsw-EN
1•brvier•16m ago•0 comments

What Codex Sends to the Model

https://www.0xkato.xyz/what-codex-actually-sends-to-the-model/
1•gmays•19m ago•0 comments

Introduction to Variable Fonts on the Web

https://web.dev/articles/variable-fonts
2•Topfi•23m ago•0 comments

Show HN: I calculated how much of every Indian price is tax and duty

https://thodasa.com
1•bhaumiktandan•23m ago•0 comments

PostgreSQL WAL as a source of truth on S3

https://neon.com/blog/wal-s3-lakebase-storage-for-the-era-of-agents
2•miladibra•23m ago•0 comments

The Chaos Machine: Prediction markets and the triumph of crypto-anarchy

https://harpers.org/archive/2026/09/the-chaos-machine-finn-brunton-crypto-anarchism/
2•YPGolyadkin•24m ago•0 comments

Elon House

https://www.elon-house.com/
1•nicolasmery•26m ago•1 comments

Ask HN: When you search for jobs do you prefer a generalist or a niche job board

1•rrmdp•27m ago•0 comments

SpaceX Shares Sink on AI Spending Plans

https://www.wsj.com/tech/ai/spacex-says-spending-spree-is-supercharging-ai-revenues-ea750ff3
1•gmays•28m ago•0 comments

Autonomy and Innovation

https://stratechery.com/2026/autonomy-and-innovation/
2•bmulholland•29m ago•0 comments

This Post Was Written by a Human

https://ratio53.com/posts/this-post-was-written-by-a-human/
2•mxschll•31m ago•1 comments

I love my modded new 3ds XL

http://crystalpvp.ru/boze/
1•Preston67•31m ago•0 comments

Text Diffusion – Brendan O'Donoghue, Google DeepMind [video]

https://www.youtube.com/watch?v=r305-aQTaU0
1•simulacra8•32m ago•0 comments

How I Read Books

3•nomilk•33m ago•2 comments

India Country Brief: The Anthropic Economic Index

https://www.anthropic.com/research/india-brief-economic-index
1•malshe•34m ago•0 comments

Kompresly – a free image compresor app

https://play.google.com/store/apps/details?id=com.kompresly.app&hl=en_US
1•granga•36m ago•0 comments

YouTuber Banned for Impersonating Himself

https://old.reddit.com/r/videos/comments/1vxc0sh/youtuber_banned_for_impersonating_himself/
2•areoform•37m ago•0 comments