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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•7mo 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!

Show HN: CF Local Helpers – Dashboard for Cloudflare Workers Local Dev

https://github.com/bimsina/cf-local-helpers
1•bimsina•4m ago•0 comments

"You should never build a CMS"

https://www.sanity.io/blog/you-should-never-build-a-cms
1•handfuloflight•6m ago•0 comments

Will blockbuster obesity drugs revolutionize addiction treatment?

https://www.nature.com/articles/d41586-025-03911-x
1•qnleigh•7m ago•0 comments

Interlock – a circuit breaker and certification system for AI infrastructure

https://github.com/CULPRITCHAOS/Interlock
1•CULPRITCHAOS•14m ago•1 comments

ICE Holding Chinese Man Who Documented Uyghur Camps

https://www.wsj.com/world/china/ice-holding-chinese-man-who-documented-uyghur-camps-a4702045
2•gok•14m ago•0 comments

Counter Social – a next-generation anti abuse and user privacy social network

https://counter.social/index.html
1•inesranzo•15m ago•0 comments

Game Theory and Your Lawn

https://domofutu.substack.com/p/game-theory-and-your-lawn
1•wjb3•16m ago•0 comments

'It was like a dream': How Australia's rarest bird of prey was found

https://www.watoday.com.au/national/western-australia/it-was-like-a-dream-how-australia-s-rarest-...
1•defrost•24m ago•0 comments

Show HN: Rolldphobia – Bundle size analyzer with tree-shaking using Rolldown

https://rolldphobia.ssssota.dev/
1•ssssota•30m ago•0 comments

Hyrumrand – Golang random number generator based on random map iteration order

https://github.com/micrictor/hyrumrand
2•mtud•33m ago•0 comments

Ask HN: How does traceroute on airplane wifis work?

1•bjourne•35m ago•0 comments

Neutrino Alchemy: Sun's Ghost Particles Caught Transforming Atoms

https://www.sciencealert.com/neutrino-alchemy-suns-ghost-particles-finally-caught-transforming-atoms
1•Guestmodinfo•35m ago•0 comments

Pingfs: Stores your data in ICMP ping packets

https://github.com/yarrick/pingfs
1•linkdd•35m ago•0 comments

Design Is Search

https://twitter.com/karrisaarinen/status/1999730838280503775
2•gmays•37m ago•0 comments

Altman: Super intelligence in 10 years, more extraordinary things in 2026

https://openai.com/index/ten-years/
2•aurareturn•37m ago•1 comments

What happens when the coding becomes the least interesting part of the work

https://obie.medium.com/what-happens-when-the-coding-becomes-the-least-interesting-part-of-the-wo...
2•gmays•39m ago•0 comments

Ask HN: A browser that syncs history reliably across devices?

1•workfromspace•44m ago•0 comments

Pizlix: Memory Safe Linux from Scratch

https://fil-c.org/pizlix
2•nullbyte808•46m ago•0 comments

Send Me to Heaven (2013)

https://en.wikipedia.org/wiki/Send_Me_to_Heaven
2•gregsadetsky•48m ago•0 comments

Maths can help you wrap your presents better

https://www.bbc.com/future/article/20251212-how-maths-can-help-you-wrap-your-presents-better
1•1659447091•49m ago•0 comments

Vibe Engineering (2026)

https://www.manning.com/books/vibe-engineering
1•turtleyacht•50m ago•0 comments

We used Codex to build Sora for Android in 28 days

https://openai.com/index/shipping-sora-for-android-with-codex/
2•crorella•50m ago•1 comments

Investors commit quarter-billion dollars to startup designing "Giga" satellites

https://arstechnica.com/science/2025/12/investors-commit-quarter-billion-dollars-to-startup-desig...
1•BWStearns•1h ago•0 comments

Rails Pulse: Performance monitoring and debugging gems for Rails application

https://github.com/railspulse/rails_pulse
1•ksec•1h ago•0 comments

Tiger teeth, dried seahorses and shark fins sold illegally on Facebook

https://www.bbc.com/news/articles/ce91072g59no
1•1659447091•1h ago•0 comments

The Chinese Billionaires Having 100s of U.S.-Born Babies via Surrogate

https://www.wsj.com/us-news/chinese-billionaires-surrogacy-pregnancy-7fdfc0c3
15•jkuria•1h ago•1 comments

The Math of Universality

https://www.pma.caltech.edu/news/the-math-of-universality
2•ashishgupta2209•1h ago•0 comments

Black Pyramid, Alaska

https://vinyasi.substack.com/p/the-black-pyramid-of-alaska
1•vinyasi•1h ago•0 comments

Advanced Embedded Software Development at CU Boulder Final Projects

https://sites.google.com/colorado.edu/aesdf25finalprojects/home
3•mooreds•1h ago•1 comments

Tiobe Index for December 2025: R Joins the Top as SQL Climbs

https://www.techrepublic.com/article/news-tiobe-commentary-dec-2025/
6•smurda•1h ago•1 comments