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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!

The night I dreamed of Archangel Michael

https://mylightstillshines.wordpress.com/2026/04/27/the-time-i-dreamt-of-archangel-michael/
1•jaygirl•5m ago•0 comments

Humans VS AI.IO – Update, New features and turrets

https://humansvsai.io
1•creatorcuffee•8m ago•0 comments

"Deep Generative Modeling": Introductory Examples

https://github.com/jmtomczak/intro_dgm
1•modinfo•8m ago•0 comments

Scalar and Binary Quantization for Pgvector Vector Search and Storage (2024)

https://jkatz05.com/post/postgres/pgvector-scalar-binary-quantization/
1•eigenBasis•12m ago•0 comments

A compact coding agent written in pure C, syscall tools, memory, pi-style TUI

https://github.com/douglascorrea/syscall-agent
1•douglascorrea•14m ago•0 comments

Turnspit Dog

https://en.wikipedia.org/wiki/Turnspit_dog
3•doener•22m ago•0 comments

Chinese University Student Expelled for Improper Contact with a Foreigner (2025)

https://thediplomat.com/2025/09/why-a-chinese-university-expelled-a-student-for-improper-contact-...
2•toilet•25m ago•0 comments

What A.I. Kant Do

https://www.nytimes.com/2026/05/16/opinion/ai-liberal-arts.html
1•doener•26m ago•0 comments

[deleted]

https://www.economist.com/china/2025/07/17/why-a-fling-with-a-foreigner-insults-chinas-national-d...
3•toilet•28m ago•2 comments

Paid HTTP APIs that AI agents auto-pay per-call (x402 and USDC)

https://bshelby88.github.io/x402-portfolio/
1•bshelby88•30m ago•0 comments

Make ZIP files smaller with ZIP Shrinker

https://evanhahn.com/make-zip-files-smaller-with-zip-shrinker/
1•zdw•37m ago•0 comments

FCP – Free Communication Protocol

https://fcp.md/
2•chalyi•38m ago•1 comments

Add –implementation-language flag to Bun

https://github.com/oven-sh/bun/issues/30897
1•quasigloam•56m ago•0 comments

Show HN: Built a verifiable, open-source SoC 2 readiness scanner

https://loxeai.com
1•arjavmehta•1h ago•0 comments

Show HN: I built a free PDF editor to fix Claude's horribly-generated PDFs

https://composer-sepia.vercel.app
2•chaidhat•1h ago•1 comments

Quick, Draw - can a neural network learn to recognize doodling?

https://quickdraw.withgoogle.com/
1•nilsbunger•1h ago•0 comments

Independent dev's physics code stuns PhysicsSE admin

https://physics.stackexchange.com/questions/872398/self-organizing-acceleration-and-stability-in-...
1•spenx•1h ago•1 comments

Fisker went bankrupt and owners built an open source car company from the ashes

https://electrek.co/2026/05/16/fisker-ocean-open-source-ev-story-after-bankruptcy/
17•breve•1h ago•0 comments

OpenAI seals deal in Malta to give all Maltese access to ChatGPT Plus

https://finance.yahoo.com/sectors/technology/articles/openai-seals-deal-malta-maltese-103120887.html
1•embedding-shape•1h ago•0 comments

Self-Complementary Graphs

https://mathworld.wolfram.com/Self-ComplementaryGraph.html
1•lorenzohess•1h ago•1 comments

Curl maintainer: AI security reports are no longer slop

https://daniel.haxx.se/blog/2026/04/22/high-quality-chaos/
2•notRobot•1h ago•0 comments

Show HN: Anagardens: A Daily Word Game

https://www.anagardens.com/
1•mperrotta•1h ago•0 comments

The offline desk gadget that got me to sit up straight

https://techcrunch.com/2026/05/16/the-offline-desk-gadget-that-actually-got-me-to-sit-up-straight/
1•jnord•1h ago•1 comments

Insdubai.com: Motor insurance policies, data of insured persons was exposed

https://write-ups.security-chu.com/2026/05/insdubai-data-breach-incident.html
1•news_rt•1h ago•0 comments

Quantum-COSMOLOGICAL ALIGNMENT (d=16)

https://github.com/lizbeth307/quantum-superactivation-refutation
1•NeoOdim•1h ago•0 comments

Near-Earth Asteroid 2026 JH2 close encounter: 18 May 2026

https://www.virtualtelescope.eu/2026/05/12/near-earth-asteroid-2026-jh2-extremely-close-encounter...
1•rolph•1h ago•0 comments

My Thoughts on Bun's Rust Rewrite

https://en.liujiacai.net/2026/05/16/bun-rust-port/
2•jwzxgo•1h ago•0 comments

Singapore Former Prime Minister Lee Hsien Loong's Sudoku Solver Written in C++

https://github.com/Doppp/LHL-Sudoku-Solver
1•doppp•1h ago•0 comments

Let's Talk about Benchmarks

https://spacetimedb.com/blog/benchmarking
1•ChadNauseam•1h ago•0 comments

My Son's Math Homework Is Essentially Just Pokémon

https://www.theatlantic.com/technology/2026/05/homework-video-games-ed-tech/687198/
4•tekdude•1h ago•0 comments