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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!

Would a Hiroshima-scale AI disaster make humanity protect itself? I fear not

https://www.theguardian.com/commentisfree/2026/aug/22/ai-disaster-hiroshima-humankind-silicon-val...
1•mellosouls•7m ago•0 comments

Setoku: Self-hosted MCP knowledge server for company data

https://setoku.com/
1•handfuloflight•10m ago•0 comments

Linus Torvalds Endures a Debug Session from Hell, "Enormously Helped" by AI

https://www.phoronix.com/news/Linus-Torvalds-Debug-AI
1•01-_-•19m ago•0 comments

Silicon Valley is losing its way

https://twitter.com/koopuluri/status/2091050880716226787
2•koopuluri•19m ago•0 comments

New U.S. tariffs in effect after trade talks fail

https://www.cbc.ca/news/world/livestory/midnight-deadline-trump-tariffs-trade-deal-leblanc-greer-...
1•Pxtl•19m ago•0 comments

How Much of the Internet Is Written with AI?

https://www.pewresearch.org/data-labs/2026/08/20/how-much-of-the-internet-is-written-with-ai/
1•01-_-•20m ago•0 comments

Canada vows to match Trump's 50% tariffs after trade deal talks fail

https://www.theguardian.com/world/2026/aug/22/canada-tariffs-trump-trade-deal-talks-fail
3•JSR_FDED•26m ago•5 comments

Paige Compositor

https://en.wikipedia.org/wiki/Paige_Compositor
1•simonebrunozzi•32m ago•0 comments

Ingmar Bergman

https://www.ingmarbergman.se/en
1•simonebrunozzi•36m ago•0 comments

Canada will match US tariffs 'dollar for dollar' as trade talks break down

https://www.bbc.com/news/articles/cvgvyy4x2mvo
6•tartoran•36m ago•0 comments

The blueprint of the first silicon-based life on Earth

https://github.com/builder0821/Second-Me
3•builder0821•38m ago•1 comments

Making LEDs at Home [video]

https://www.youtube.com/watch?v=VHyoz8fFpUM
1•Klaster_1•42m ago•0 comments

EnvHarness: Awakening Static Worlds for Agent Learning

https://arxiv.org/abs/2608.19880
1•Alephinitesimal•45m ago•0 comments

Ask HN: What is the evidence for a stock market bubble in AI?

4•roschdal•45m ago•2 comments

Show HN: A self-hosting compiler from an undergraduate mathematics course

https://github.com/michael-lehn/not-abc
2•michael-lehn•46m ago•0 comments

Richardson-Lucy Method

https://www.jeol.com/words/emterms/20121023.105457.php#gsc.tab=0
2•Bluestein•49m ago•0 comments

How e‐Paper works and how to work with it

https://github.com/bitbank2/bb_epaper/wiki/How-e%E2%80%90Paper-works-and-how-to-work-with-it
2•sohkamyung•56m ago•0 comments

SpessaSynth: SF2/DLS JavaScript Synthesizer Online Demo

https://spessasus.github.io/SpessaSynth/
1•gregsadetsky•57m ago•0 comments

Intelligence per Watt: Measuring Intelligence Efficiency of Local AI

https://arxiv.org/abs/2511.07885
1•helsinkiandrew•58m ago•0 comments

Show HN: Front end skill pack for AI agents, with machine-enforced quality gates

https://krishna-modi12.github.io/frontend-design-pro/
1•KrishnaModi12•1h ago•0 comments

Why memories get fuzzier with age – and what replaces them

https://www.uea.ac.uk/about/news/article/why-memories-get-fuzzier-with-age-and-what-replaces-them
2•XzetaU8•1h ago•0 comments

Apple Guts Vision Pro Gaming and Immersive Video Teams, Trims Siri Staff

https://www.macrumors.com/2026/08/21/apple-guts-vision-pro-teams/
2•tosh•1h ago•3 comments

The Instant team joins OpenAI

https://www.instantdb.com/essays/instant_team_joins_openai
6•emp_•1h ago•7 comments

Void Tools API – Blockchain Tools for AI Agents (Pay in Void Tokens)

1•void_protocol•1h ago•0 comments

Anonymous GitHub

https://anonymous.4open.science/
2•habi•1h ago•1 comments

Programming Language Semantics and Memory Safety

https://burakemir.ch/post/formal-semantics/
1•matt_d•1h ago•0 comments

K-Way Merge

https://maksimkita.com/blog/k-way-merge.html
2•kitaisreal•1h ago•0 comments

Show HN: ScreenshotM8 – Full Page Screenshot Tool

https://chromewebstore.google.com/detail/screenshotm8-screenshot-t/ocmjnpmhpndnpmgipknfbhcjdgokgiml
1•louisblythe•1h ago•0 comments

Use medium thinking effort instead of xhigh

https://xcancel.com/antibot/captcha
2•vismit2000•1h ago•3 comments

Show HN: Is-agentic – Score how agentic your product and site is

https://is-agentic.com
1•andrewqu•1h ago•0 comments