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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!

1•zhendershot•19s ago

Friendship Recession

https://en.wikipedia.org/wiki/Friendship_recession
1•futurecat•20s ago•0 comments

AI Generates Files. Who Manages Them?

https://filesfirst.substack.com/p/your-ai-generates-files-who-manages
1•ilian•37s ago•0 comments

Show HN: Exp / Desktop App to simply convert

https://getexpi.app
1•philematic•1m ago•0 comments

Show HN: RaptorCI – Catch risky code changes and weak tests before they ship

https://getraptorci.com/
1•jcarroll24•1m ago•0 comments

Universe to You – Everything Explained. Probably

https://scrollytelling.ai/universe-to-you/
1•thunderbong•1m ago•0 comments

The Fair Match Calculator: A realistic look at your local dating pool

https://tkmcnierney.github.io/fair-match-calculator/
1•Gooblebrai•2m ago•0 comments

Iran eyes crypto toll for oil tanker transits through Strait of Hormuz

https://www.coindesk.com/markets/2026/04/08/iran-eyes-crypto-toll-for-oil-tanker-transit-through-...
1•zoklet-enjoyer•3m ago•0 comments

All Nations, World Bodies 'Must Urgently Intervene' to Stop Trump from Wiping

https://www.commondreams.org/news/trump-threat-to-iran
2•hkhn•3m ago•0 comments

Why Integrated Copilots Suck

https://deadneurons.substack.com/p/why-integrated-copilots-suck
2•nr378•3m ago•0 comments

Two Mornings a Day

https://blog.quent.in/blog/2026/04/08/two-mornings-a-day/
1•sylvainkalache•3m ago•0 comments

Dear Google Cloud: Your Deprecation Policy Is Killing You (2020)

https://steve-yegge.medium.com/dear-google-cloud-your-deprecation-policy-is-killing-you-ee7525dc05dc
1•DangitBobby•5m ago•1 comments

Thoughts on increasing SSH security using a hardware security key

https://neilzone.co.uk/2026/04/thoughts-on-increasing-ssh-security-using-a-hardware-security-key/
1•speckx•5m ago•0 comments

Thousands of Consumer routers hacked by Russia's military

https://arstechnica.com/security/2026/04/russias-military-hacks-thousands-of-consumer-routers-to-...
1•oldnetguy•5m ago•0 comments

A physical "Enter console" for multi-agent AI coding workflows

https://blog-whi-sper.vercel.app/blog/continue-deck
2•whis_per•10m ago•0 comments

I built a Python like DSL for enterprise grade OpenClaw/hermes/paperclip agents

https://github.com/aelaguiz/doctrine
1•aelaguiz•11m ago•1 comments

Embedding truncation is the bottleneck in AI memory retrieval

https://open.rankfor.ai/resources/ai-memory-benchmark-seci-vs-raw-2026
2•dizhat•12m ago•0 comments

China and Taiwan: Are changes coming?

https://news.az/news/china-and-taiwan-are-changes-coming
2•seekdeep•12m ago•0 comments

Oestrus Ovis Nasal Myiasis with Pupation in Human Host, Greece, October 2025

https://wwwnc.cdc.gov/eid/article/32/3/25-1077_article
1•bookofjoe•13m ago•0 comments

Show HN: Idt – A Swiss Army Knife for UUID, ULID, Snowflake, and More

https://github.com/sh-cho/idt
2•sh-cho•18m ago•0 comments

How time-lock puzzles work

https://blog.alcazarsec.com/tech/posts/time-lock-puzzles-need-hidden-order-groups
2•alcazar•19m ago•0 comments

From bytecode to bytes: automated magic packet generation

https://blog.cloudflare.com/from-bpf-to-packet/
2•salkahfi•19m ago•0 comments

A deterministic workflow compiler –> turns LLM intent into forms, docs, and APIs

https://web.geniesnap.com/
2•geniesnap•21m ago•2 comments

Show HN: Killpy – CLI to find and clean Python environments

https://github.com/Tlaloc-Es/KillPy
2•Tlaloc-Es•21m ago•0 comments

It's Time to Move on from Harry Potter

https://www.otherstrangeness.com/2026/04/08/its-time-to-move-on-from-harry-potter/
3•speckx•23m ago•1 comments

PyTorch Foundation Adds to Its Portfolio

https://techstrong.ai/features/pytorch-foundation-adds-to-its-portfolio/
2•CrankyBear•23m ago•0 comments

RSVP to the FBI

http://www.terrybisson.com/rsvp-to-the-fbi/
3•georgecmu•23m ago•0 comments

I Am Fond of the Pipeline Operator

https://functiondispatch.substack.com/p/i-am-very-fond-of-the-pipeline-operator
2•birdculture•24m ago•0 comments

Where does all the milk go?

https://www.dhanishsemar.com/writing/dairy-production-process
2•DiffTheEnder•24m ago•0 comments

Amazon rewards loyal Kindle devotees by closing the book on old e-readers

https://www.theregister.com/2026/04/08/amazon_kindle_support_discontinued/
4•beardyw•25m ago•0 comments