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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•10mo 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!

I was paid to write fake Google reviews – then my 'bosses' tried to scam me

https://www.theguardian.com/technology/2026/mar/27/paid-write-fake-google-reviews-scammer-cryptoc...
1•mykowebhn•1m ago•0 comments

Study: Space no gravity negatively impact sperm navigation, affecting childbirth

https://adelaideuni.edu.au/about/news/2026/human-sperm-may-get-lost-in-space/
1•giuliomagnifico•5m ago•0 comments

Show HN: HTML Viewer with Bidirectional Highlighting (Code ↔ Highlight Element)

https://html-viewer.org
1•jackxmm•5m ago•0 comments

Blog: Book on AI Agents for the Layman

https://www.investigatingsoftware.co.uk/2026/03/the-best-book-on-ai-agents-for-layman.html
2•phoughton•7m ago•0 comments

Should QA Exist

https://www.rubick.com/should-qa-exist/
4•PretzelFisch•13m ago•1 comments

Riding the Memory Boom and Trying to Avoid the Bust

https://www.nextplatform.com/store/2026/03/24/riding-the-memory-boom-and-trying-to-avoid-the-bust...
3•rbanffy•14m ago•0 comments

Taking Down the Internet's Most Popular HTTP Client with a Single JSON Key

https://www.striga.ai/research/crashing-axios-with-proto
4•traekfuglene•15m ago•1 comments

Pyrite64: N64 Game-Engine and Editor using libdragon and tiny3d

https://github.com/HailToDodongo/pyrite64
2•hexmiles•15m ago•0 comments

ninja: a small build system with a focus on speed

https://github.com/ninja-build/ninja
1•tosh•17m ago•0 comments

Show HN: GameHippo.art – Preserving a lost freeware game directory from 2004

https://gamehippo.art
1•hedin_hiervard•17m ago•0 comments

Scaling a Monolith to 1M LOC: 113 Pragmatic Lessons

https://www.semicolonandsons.com/articles/scaling-a-monolith-to-1m-loc-113-pragmatic-lessons-from...
1•semicolonandson•18m ago•0 comments

Ask HN: Any Tradespeople Here?

3•documentorium•29m ago•0 comments

Hold on to Your Hardware

https://xn--gckvb8fzb.com/hold-on-to-your-hardware/
11•LucidLynx•30m ago•3 comments

Ten C64 Demo [video]

https://www.youtube.com/watch?v=QMDE_Sd98cA
1•Fr0styMatt88•31m ago•0 comments

Comparison of two frameworks: 4.0M vs. 2.5M tokens for the same app

https://wasp.sh/blog/2026/03/26/nextjs-vs-wasp-40-percent-less-tokens-same-app
2•Martinsos•32m ago•1 comments

SimpleLogin CLI

https://github.com/mexcool/simplelogin-cli
1•mexcool•35m ago•0 comments

Chronoo – a web-based journaling app where data is stored locally in the browser

https://github.com/altilunium/chronoo
1•altilunium•40m ago•0 comments

Show HN: Walkie-Talkie – Access your terminal from any browser with one command

https://www.walkie-talkie.dev/
1•vochsel•41m ago•0 comments

Noelia Castillo Euthanasia Case

https://en.wikipedia.org/wiki/Noelia_Castillo_euthanasia_case
3•stared•42m ago•0 comments

See what your AI agents are doing (multi-agent observability tool)

https://github.com/hit1001/multiagent-visibility-tool
1•denhit10•43m ago•0 comments

Show HN: Writevoid.com – stop writing, and the void takes it

https://writevoid.com
1•user_timo•45m ago•1 comments

Data centre to be built near planned Polish nuclear power plant

https://world-nuclear-news.org/articles/data-centre-to-be-built-near-planned-polish-nuclear-power...
1•mpweiher•47m ago•0 comments

Ipxlat: a stateless IPv4/IPv6 translation device

https://lore.kernel.org/netdev/20260319151230.655687-1-ralf@mandelbit.com/T/#m6b6603d690f9bd7f85c...
1•argulane•48m ago•0 comments

I built Amazon dynamo in elixir

https://jitesh117.github.io/blog/implementing-amazon-dynamo-in-elixir/
1•Jitesh117•49m ago•0 comments

A discrete-logic solution to the Three-Body Problem (99% compute saving)

https://github.com/alikamp/Parks-Node-Ejection-Protocol
2•kauai1•50m ago•1 comments

Splitflap.org: open-source split-flap display for any screen

https://splitflap.org/
1•mohdmahmodi•51m ago•0 comments

You shall know them by their scams

https://terminaldrift.substack.com/p/you-shall-know-them-by-their-scams
1•limbicsystem•54m ago•0 comments

Show HN: 10 Lines of Python to fix mangled copy-paste from Claude Code

1•collectedparts•55m ago•0 comments

Ronda Rousey Fights Like an Outlier (2015)

https://fivethirtyeight.com/features/ronda-rousey-fights-like-an-outlier/
1•chistev•56m ago•1 comments

Understanding the Go Runtime: The Garbage Collector

https://internals-for-interns.com/posts/go-garbage-collector/
1•valyala•56m ago•0 comments