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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!

Small, calm welcome screen for Emacs (a warm extensible dashboard)

https://codeberg.org/jjba23/welkomscherm.el
1•jjba23•32s ago•0 comments

Show HN: Codex quota tracker Garmin watch face

https://github.com/greg76/token-quota/tree/main
1•gregkb•3m ago•0 comments

12 Angry Agents

1•anuptalwalkar•5m ago•0 comments

Conservation of Compute

https://nishantjosh.dev/blogs/conservation-of-compute/
1•cat-whisperer•6m ago•1 comments

I ran the full 2.8T-parameter Kimi-K3 on a 64GB Mac Mini

https://github.com/sjdthree/kimi-k3-mlx-macmini
1•sjdthree•7m ago•1 comments

German court calls Google aerial imagery 'spying'

https://www.courthousenews.com/german-court-calls-google-aerial-imagery-spying/
1•rdmuser•8m ago•0 comments

Narrative Deck – AI Agent skill for creating interactive web stories

https://aakatheeri.github.io/narrative-deck/
2•aakatheeri•8m ago•0 comments

Greece passes social media ban for children under 15

https://www.reuters.com/legal/litigation/greece-passes-social-media-ban-children-under-15-2026-10...
1•thunderbong•11m ago•0 comments

I Am New Here

1•dev_man•13m ago•1 comments

Show HN: You Can Just Filter YouTube Playlists in the 'Save to Playlist' Dialog

2•ydoc5212•16m ago•0 comments

iPhone Duo jailbroken on launch day

https://www.macrumors.com/2026/10/23/iphone-duo-jailbreak/
4•gloxkiqcza•18m ago•1 comments

A Fix for Softmax and Cross-Entropy

https://jonbarron.info/softmaxfix/
2•Georgelemental•19m ago•0 comments

Oil spill washes up on UAE beaches after tanker strike

https://www.bbc.com/news/articles/c6rey3n974g5o
1•blondie9x•20m ago•0 comments

Birdwatching rewires the brain and slows cognitive decline

https://www.bbc.com/future/article/20261019-birdwatching-rewires-the-brain-and-slows-cognitive-de...
2•cisc•22m ago•2 comments

The same AI question emits more carbon dioxide in Texas than in Sweden

https://www.cio.com/article/4238689/the-same-ai-project-emits-more-carbon-dioxide-in-texas-than-i...
1•wltyn•22m ago•0 comments

Google will pay people to use less electricity so its data centers can use more

https://www.computerworld.com/article/4239858/google-will-pay-people-to-use-less-electricity-so-i...
2•mikelgan•23m ago•0 comments

Learning as Freedom (2012)

https://www.nytimes.com/2012/09/06/opinion/john-deweys-vision-of-learning-as-freedom.html
1•alasr•24m ago•1 comments

AI devours a fifth of companies' IT budgets

https://www.computerworld.com/article/4239898/ai-accounts-for-one-fifth-of-companies-it-budgets.html
3•mikelgan•26m ago•0 comments

Why have coding agents not brought easter-egg utopia?

https://rallywith.ai/blog/bring-back-easter-eggs/
1•ajuhasz•28m ago•0 comments

HumanLayer is now Open Source

https://www.hlyr.dev/blog/open-sourcing-humanlayer
4•dhorthy•29m ago•0 comments

AI Just Raised the Stakes on Continuous Delivery

https://www.bradoyler.com/ai/continuous-delivery-is-a-security-feature/
1•bradoyler•33m ago•0 comments

Window Heat Pumps Offer Efficient Heating and Cooling Without Ductwork

https://www.wsj.com/business/energy-oil/window-heat-pumps-heating-cooling-fd552926
1•bookofjoe•33m ago•1 comments

Factorio version 2.1, the final major update for the game, has been released

https://factorio.com/blog/post/fff-449
2•haunter•34m ago•0 comments

Ritmo: Type-safe ECS runtime for TypeScript

https://ritmo.typeonce.dev/
1•sandromaglione•38m ago•0 comments

Bitter Lessoned in Automated Theorem Proving

https://essays.johnloeber.com/p/34-bitter-lessoned-in-automated-theorem
1•loeber•39m ago•0 comments

One Man's Pan Am 747 Replica [video]

https://www.youtube.com/watch?v=vAFwHGGfPz4
1•Teever•40m ago•0 comments

Zedis v0.2.0

https://github.com/barddoo/zedis/releases/tag/v0.2.0
1•barddoo•43m ago•0 comments

Empirical agents with hard constraints, strict isolation and trusty protocols

https://qip.dev/essays/empirical-agents-with-hard-constraints-strict-isolation-trusty-protocols
2•codesparkle•43m ago•0 comments

Show HN: Token Beggar, route coding agent subtasks to cheaper models

https://github.com/Arthur031221/Token-Beggar
2•levi74108520963•49m ago•0 comments

Show HN: AiSniff, underline the phrases in a text that read like AI wrote them

https://github.com/Arthur031221/AiSniff
1•levi74108520963•50m ago•0 comments