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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!

Konami Code

https://konami.fandom.com/wiki/Konami_Code
1•andsoitis•1m ago•0 comments

Who is cleaning up all the garbage LLMs generate?

1•kbrannigan•3m ago•0 comments

Superpowers Race to Put Nuclear Reactors on the Moon

https://www.nytimes.com/2026/10/04/world/asia/nuclear-reactors-moon.html
1•thelastgallon•11m ago•0 comments

Primitives for Sane Conversation About AI

https://humanparadox.org/primitives-for-sane-conversation-about-ai/
1•colingauvin•12m ago•0 comments

Show HN: Orrery, a Three.js solar system visualization powered by real NAIF data

https://orrery.ryboso.me/
2•rybosome•13m ago•0 comments

A 40ms Go garbage collector pause caused by swap

https://frn.sh/go-gc/
5•shellpipe•13m ago•0 comments

NOAA Public Space Weather Notice Code: WARK04 Serial Number: 5424

https://www.astrophyzix.com/2026/10/04-live-space-alert.html
2•SpaceNewsNow•17m ago•0 comments

Huawei Kirin 9050 Pro uses impressive 3D V-Cache-like stacked design for the SoC

https://www.notebookcheck.net/Teardown-shows-Huawei-Kirin-9050-Pro-uses-a-3D-V-Cache-like-stacked...
1•rguiscard•18m ago•0 comments

Court Tosses Sentence After A.I. Video of Victim 'Forgiving' His Killer

https://www.nytimes.com/2026/10/04/us/manslaughter-conviction-overturned-ai-video-statement.html
1•sbulaev•18m ago•1 comments

Fix Your AI Slop Problem by Giving Reviewers Credit

https://danunparsed.com/p/giving-code-reviewers-credit
1•sambellll•19m ago•0 comments

"But it would have bothered us the rest of our lives."

https://unsung.aresluna.org/but-it-would-have-bothered-us-the-rest-of-our-lives/
1•zdw•19m ago•0 comments

Free Your Bios Today

https://www.gnu.org/software/gnuboot/
3•rguiscard•26m ago•0 comments

The logic of gambling undergirds everything coming out of Silicon Valley

https://www.nytimes.com/2026/10/04/magazine/gambling-prediction-markets-statistics.html
10•ripe•27m ago•2 comments

Edge Python, a sandboxed Python in WASM that beats CPython on loops

https://edgepython.com/
2•csuttondylan•29m ago•0 comments

Adversarial Artificial Intelligence

https://www.rand.org/pubs/research_reports/RRA4734-2.html
2•snarky-comments•30m ago•0 comments

Butterick's Practical Typography (2013)

https://practicaltypography.com
2•thebiblelover7•31m ago•0 comments

Musk explains why Tesla Robotaxi is not running at night, & Lidar is the answer

https://electrek.co/2026/10/03/tesla-robotaxi-pets-night-musk-lidar/
4•FabHK•42m ago•1 comments

Handfasting

https://en.wikipedia.org/wiki/Handfasting
2•thunderbong•43m ago•0 comments

Show HN: A Hotspot-Inspired Common Lisp for Linux/Windows/Android

https://github.com/atgreen/evergreen
1•atgreen•43m ago•0 comments

System One models like Jev can train their own replacements

https://www.seangoedecke.com/system-one-models-can-train-their-own-replacements/
1•gfysfm•44m ago•0 comments

Abstract Semantics of Machine Realizations

https://machine-semantics.grok.me
1•measurablefunc•45m ago•0 comments

Military AI and autonomous systems: views in The Strategist

https://www.aspistrategist.org.au/military-ai-and-autonomous-systems-views-in-the-strategist/
2•snarky-comments•46m ago•0 comments

First probe monitors fetal health in utero during surgery

https://news.northwestern.edu/stories/2026/01/first-of-its-kind-probe-monitors-fetal-health-in-ut...
2•wglb•49m ago•0 comments

Hacking the Go compiler to efficiently map IPv4 to IPv6

https://vincent.bernat.ch/en/blog/2026-go-netip-addrto6
2•stock_toaster•54m ago•1 comments

Legal risks pile up for Altman as OpenAI uncovers hacks

https://www.ft.com/content/2c24ece3-ac99-43a8-b0e6-4a3867e37ebf
8•JumpCrisscross•1h ago•3 comments

What's Going on with Restaurant Wine Pricing?

https://www.wineenthusiast.com/culture/podcasts/wine-enthusiast-podcast/restaurant-wine-pricing/?...
2•brandonb•1h ago•0 comments

Beyond Information Asymmetry: The Changing Nature of Medical Expertise

https://www.jacc.org/doi/epdf/10.1016/j.jacc.2026.08.018
1•brandonb•1h ago•0 comments

Harbinger Receives Binding Order for 2k Electric Trucks from FedEx

https://harbingermotors.com/newsroom/fedex-orders-2000-harbinger-electric-trucks/
1•JumpCrisscross•1h ago•1 comments

Can AI run an family/organization if so for who?

https://cahootzcommons.com/blog/ai-can-run-an-organization-its-members-must-decide-who-the-organi...
1•DeonRob•1h ago•2 comments

If it hurts, do it more

https://jnsgr.uk/2026/09/if-it-hurts-do-it-more
2•aray07•1h ago•0 comments