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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•9mo 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!

Red Blood Cells Serve as a Primary Glucose Sink to Improve Glucose Tolerance

https://www.biorxiv.org/content/10.1101/2025.04.24.650365v1
1•janandonly•2m ago•0 comments

Flycast WASM – Sega Dreamcast Emulation in the Browser via WebAssembly

https://github.com/nasomers/flycast-wasm
1•XzetaU8•3m ago•0 comments

Diode – Build, program, and simulate hardware in the browser

https://www.withdiode.com/
1•tzury•4m ago•0 comments

From chickens to humans, animals think "bouba" sounds round

https://arstechnica.com/science/2026/02/newly-hatched-chickens-form-the-same-sound-association-we...
1•lentoutcry•5m ago•0 comments

Deprecate. Fix. Enforce. Repeat

http://emanueleminotto.github.io/blog/dfer
1•EmanueleMinotto•6m ago•0 comments

Hunting for traces of chibicc in Claude's C compiler

https://github.com/anthropics/claudes-c-compiler/issues/232
1•silver_sun•9m ago•0 comments

The Law of Leaky Abstractions (2002)

https://www.joelonsoftware.com/2002/11/11/the-law-of-leaky-abstractions/
1•tosh•9m ago•0 comments

A Modest Server-Centric Development Proposal

https://automattic.com/2026/02/17/server-centric-development/
1•agbonghama•11m ago•0 comments

Creator of Claude Code: "Coding is solved"

https://www.lennysnewsletter.com/p/head-of-claude-code-what-happens
1•birdculture•16m ago•2 comments

Death to Scroll Fade

https://dbushell.com/2026/01/09/death-to-scroll-fade/
1•shpat•17m ago•0 comments

Show HN: New kid on the block: meet Ajime, robotics CI/CD next-gen platform

1•ajime•18m ago•1 comments

A text based life simulation game

https://lifespan-eight.vercel.app/
1•jwatermelon•19m ago•0 comments

Show HN: Remove backgrounds and make passport photos in the browser

https://webaitool.net/bg-remove.html
1•shahidsj•23m ago•0 comments

Show HN: Grantvera – cell-level permission control for Google Sheets

https://grantvera.com
1•omsharp•25m ago•0 comments

Peer validation platform for engineering skills (inspired by X community notes)

1•ms_sv•26m ago•0 comments

Large Language Model Reasoning Failures

https://arxiv.org/abs/2602.06176
1•T-A•29m ago•0 comments

Conference with AI -written paper submissions only

https://humanxaifinance.org/
1•sherlock_h•30m ago•0 comments

WebMCP App for Composing Music

https://music.leanmcp.live/?id=RrFINcOq
1•dheerajmp•30m ago•0 comments

LibreOffice blasts OnlyOffice for working with Microsoft to lock users in

https://www.neowin.net/news/libreoffice-blasts-fake-open-source-onlyoffice-for-working-with-micro...
5•XzetaU8•30m ago•0 comments

Show HN: AI Council v2 – multi-model deliberation, now with 35 personas

https://github.com/prijak/Ai-council
1•prijak•33m ago•0 comments

Show HN: GenPPT AI – Turn any idea into professional slides in seconds

https://genppt.ai/
2•polarisminor•37m ago•0 comments

Scientists find a way to plant ideas in dreams through sound cues

https://www.good.is/scientists-find-a-way-to-plant-ideas-in-dreams-through-sound-cues-to-improve-...
2•bryanrasmussen•40m ago•1 comments

Show HN: undent - fix indentation issues in multiline strings in js

https://github.com/okikio/undent
1•okikio•41m ago•1 comments

The No-BS Guide to AI Video Creation at Scale

https://www.openslop.ai/blog/the-no-bs-guide-to-ai-video-creation-at-scale
1•umairnadeem123•42m ago•0 comments

Louisa May Alcott and H.C. Andersen: a dream

https://medium.com/luminasticity/louisa-may-alcott-and-h-c-andersen-7b854965b402
1•bryanrasmussen•42m ago•0 comments

24 Hour Fitness Won't Let You Unsubscribe From Marketing Spam, So I Fixed It

https://ahmedkaddoura.com/projects/24hf-unsubscribe
2•daem•45m ago•0 comments

Phil Spencer and Sarah Bond Leaving Xbox

https://www.gamesindustry.biz/report-phil-spencer-and-samantha-bond-leaving-xbox
1•gbbloke•46m ago•0 comments

Making YAML the Default in Bruno v3.1

https://blog.usebruno.com/making-yaml-the-default-in-bruno-v3.1
1•jicea•46m ago•0 comments

Maligna Kodera

https://krzyhau.itch.io/maligna-kodera
1•lifthrasiir•47m ago•0 comments

Diffusion of Responsibility

https://tante.cc/2026/02/14/diffusion-of-responsibility/
2•logicprog•47m ago•1 comments