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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!

An AI-supervised remote exam went so badly that 58,000 students must retake it

https://arstechnica.com/culture/2026/08/an-ai-supervised-remote-exam-went-so-badly-that-58000-stu...
1•sbulaev•59s ago•0 comments

Incus 7.3 adds easy GPU virtualization

https://discuss.linuxcontainers.org/t/incus-7-3-has-been-released/27033
1•ropyeett•1m ago•0 comments

Arsenic, 133 times the legal limit being found in the water around Aughinish

https://www.irishpoliticsnewsletter.ie/p/aughinish-133-times-the-limit
1•IrishPoliticsNL•1m ago•0 comments

Codes, Chess and Kubrick: The Life of Jack Good – GCHQ

https://www.gchq.gov.uk/information/codes-chess-and-kubrick-life-jack-good
1•rbanffy•2m ago•0 comments

Windows XP 2002 for the Itanium: Unbridled rage

https://virtuallyfun.com/2026/08/03/windows-xp-2002-for-the-itanium-unbridled-rage/
2•jandeboevrie•3m ago•0 comments

Reverse Jevons Paradox

https://mht.wtf/post/jevons/
1•martinhath•3m ago•0 comments

Apple launches legal challenge against UK government demand to access data

https://www.theguardian.com/technology/2026/aug/03/apple-legal-challenge-uk-government-data-access
3•sega_sai•5m ago•1 comments

Rejourney Flutter Analytics in Beta: Session Replay for Flutter GPU and Impeller

https://rejourney.co/engineering/2026-08-01/flutter-sdk-open-beta
1•mrr7337•6m ago•0 comments

Stanford CS329A Self-Improving AI Agents – Part 1 [video]

https://www.youtube.com/watch?v=6YnLB0XbTnI
1•simonpure•8m ago•0 comments

Show HN: Use same crypto crime-fighting toolset as top law enforcement agencies

https://mcp.caudexcatena.com
1•caudena•13m ago•0 comments

Younger generations may be more cancer-prone

https://www.dw.com/en/study-shows-why-younger-generations-may-be-more-cancer-prone/a-78163655
1•andrewstetsenko•15m ago•0 comments

Show HN: Leclaude – A little badge for your Claude Code projects

https://github.com/robinduckett/leclaude
1•robinduckett•15m ago•0 comments

Who's Writing Open Source Code?

https://redmonk.com/sogrady/2026/07/30/writing-open-source/
1•richards•16m ago•1 comments

Rescuing my 2006 Travel Blog

https://www.atomic14.com/2026/08/03/rescuing-a-2006-travel-blog
3•iamflimflam1•21m ago•0 comments

Wall Street learns to love blockchain

https://www.ft.com/content/7600731b-4f7f-4d38-a478-3196c565a880
1•toomuchtodo•21m ago•1 comments

Ask HN: Who is firing? (August 2026)

7•ethanwillis•21m ago•0 comments

Ask HN: Who is quitting? (August 2026)

8•ethanwillis•22m ago•0 comments

Viola – A Calmer Web Browser

https://violabrowser.com/
1•allenc•23m ago•1 comments

A pattern-recognition test for coding interviews, no signup

https://algopath.pro/placement
1•ellhnv•24m ago•0 comments

Neural Amp Modeler (Nam) Architecture 2 (A2)

https://www.tone3000.com/blog/introducing-neural-amp-modeler-nam-architecture-2-a2
1•arbayi•25m ago•0 comments

Influencers draw backlash for attending OpenAI's first luxury trip

https://techcrunch.com/2026/08/03/influencers-draw-backlash-for-attending-openais-first-luxury-trip/
1•allenc•26m ago•0 comments

Existential Risk from AI: An Exposition for Mathematicians

https://alkjash.github.io/ai-risk/
1•x312•26m ago•0 comments

Telescope to Kaleidoscope: Nonlinear Orientation of the Transparent Eyeball

https://theinterposer.substack.com/p/telescope-to-kaleidoscope
1•headspreader•27m ago•0 comments

Don't start a startup with the goal of getting acquired

https://www.raymondyxu.com/blog/dontStartAStartupToGetAcquired
1•greenfish6•27m ago•0 comments

Base Power raises another $1B

1•daveorzach•28m ago•1 comments

Learning to fly FPV drones with AI flight coach

https://blog.divyendusingh.com/p/learning-to-fly-fpv-drones-with-ai
1•divyenduz•28m ago•0 comments

ZX Spectrum System Tour: Text Mode – Bumbershoot Software

https://bumbershootsoft.wordpress.com/2026/05/30/zx-spectrum-system-tour-text-mode/
2•rbanffy•28m ago•0 comments

Do birds enjoy flying? Analysis of affect after flight in galah (E roseicapilla)

https://brill.com/view/journals/beh/aop/article-10.1163-1568539X-bja10370/article-10.1163-1568539...
2•bookofjoe•29m ago•1 comments

Testing ultra-thin display film technology in Shenzhen

https://twitter.com/Rainmaker1973/status/2083469397394374920
2•kaycebasques•29m ago•0 comments

Critical Coldcard flaw: what happened, who is affected, and what to do

https://wizardsardine.com/blog/coldcard-rng-vulnerability/
1•crcastle•29m ago•1 comments