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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!

New adventures, same company (2024)

https://www.mooreds.com/wordpress/archives/3643
2•mooreds•1m ago•0 comments

Ignoring the War Has Been Working for Long-Term Investors

https://www.nytimes.com/2026/04/24/business/iran-war-stocks-bonds-investing.html
2•mooreds•10m ago•0 comments

There is too much traffic for Alex to walk to school, so we drive (2019)

https://www.researchgate.net/publication/324388709_There_is_too_much_traffic_for_Alex_to_walk_to_...
3•aziaziazi•11m ago•0 comments

The Space Between Humans, AI, and the Work We've Been Avoiding

https://www.bettyjunod.com/blog/the-space-between-humans-ai-and-the-work-weve-been-avoiding
2•mooreds•11m ago•0 comments

Trading Is Getting Younger, Ownership Is Getting Older

https://www.apollo.com/wealth/the-daily-spark/trading-is-getting-younger-ownership-is-getting-older
2•akyuu•15m ago•0 comments

Record Labels Drop Piracy Lawsuits Against Altice and Verizon After Cox Ruling

https://torrentfreak.com/record-labels-drop-piracy-lawsuits-against-altice-and-verizon-in-wake-of...
3•Cider9986•15m ago•0 comments

Trends in sudden death mortality across Europe, 2010–2020

https://www.thelancet.com/journals/lanepe/article/PIIS2666-7762(26)00067-0/fulltext
2•akyuu•18m ago•0 comments

Man stole coworkers identity for 30 yrs, victim in mental hosp exonerated by DNA

https://www.cbsnews.com/minnesota/news/matthew-keirans-coworker-identity-theft-sentence-william-w...
3•randycupertino•20m ago•1 comments

Error 404 (Not Found) 1

http://google.com/does-not-exist
2•pbhn•21m ago•1 comments

Mortgage lenders to consider rent history in mortgage applications

https://www.marketplace.org/story/2026/04/23/fannie-freddie-change-to-make-it-easier-for-renters-...
2•littlexsparkee•22m ago•0 comments

Working with Claude Code: A Field Manual

https://blog.iannelson.uk/working-with-claude-code
2•ianfrasernelson•23m ago•0 comments

Robotic Security Dogs Now on the Job to Protect Crops

https://www.globalagtechinitiative.com/in-field-technologies/robotics-automation/robotic-security...
3•rmason•24m ago•1 comments

Supreme Court to hear argument on law enforcement's use of "geofence warrants"

https://www.scotusblog.com/2026/04/court-to-hear-argument-on-law-enforcements-use-of-geofence-war...
3•throw0101c•24m ago•1 comments

Anthropic CPO leaves Figma board after reports of competing product

https://techcrunch.com/2026/04/16/anthropic-cpo-leaves-figmas-board-after-reports-he-will-offer-a...
2•gmays•26m ago•0 comments

Editable 3D models with code or AI in Roblox

https://twitter.com/roblox/status/2047406073263382834
3•dmarcos•28m ago•0 comments

What Is an Enterprise Learning Management System?

1•financehub•29m ago•0 comments

SQLite Vec1 Vector Extension for vector search

https://sqlite.org/vec1/doc/trunk/doc/vec1.md
1•OutOfHere•35m ago•0 comments

Show HN: I've built a nice home server OS

https://lightwhale.asklandd.dk/
11•Zta77•35m ago•1 comments

The Surveillance Accountability Act Demands Warrants for Data

https://reclaimthenet.org/surveillance-accountability-act
2•Cider9986•36m ago•0 comments

Show HN: Wayland Wlroot Hjkl Everywhere

https://git.sr.ht/~hocwp/blog/tree/main/wlroot-hjkl-everywhere.md#wayland-wlroot-codehjklcode-eve...
2•pbrhocwp•37m ago•0 comments

Cloudflare for SaaS: your old provider can silently keep your domain

https://blog.iodev.org/blog/cloudflare-saas-custom-hostname-conflict/
4•else42•39m ago•0 comments

Show HN: Codex context bloat? 87% avg reduction on SWE-bench Verified traces

https://www.npmjs.com/package/pando-proxy
4•george_ciobanu•43m ago•2 comments

Generalised plusequals

https://leontrolski.github.io/alt.html
1•leontrolski•43m ago•0 comments

Ask HN: Any Developer from Wales?

1•danver0•44m ago•1 comments

We Are (Still) Living in the Long Boring

https://freddiedeboer.substack.com/p/we-are-still-living-in-the-long-boring
6•YeGoblynQueenne•47m ago•0 comments

What AI Needs That $700B Can't Buy

https://cyrusradfar.com/thoughts/what-700-billion-cant-buy
2•cyrusradfar•49m ago•1 comments

Show HN: I built a CLI that turns your codebase into clean LLM input

https://github.com/NoahCristino/llmcat
2•cristinon•53m ago•0 comments

The blame game: The Trump coalition is fracturing as Iran operation stalls

https://theins.press/en/politics/291937
3•lschueller•54m ago•2 comments

Ubuntu has started a 'complete redesign' of Launchpad

https://www.neowin.net/news/ubuntu-has-started-a-complete-redesign-of-the-series-page-on-launchpad/
2•bundie•57m ago•0 comments

Palantir's Manifesto Promises a Dystopian Future

https://www.thenation.com/article/society/alex-karp-palantir-techbro-fascism/
4•fnimick•57m ago•0 comments