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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!

Ask HN: How do indie/open-source projects get a WCAG ACR done affordably?

https://github.com/No-Suggest/NoSuggest
1•VJ-2-108•2m ago•1 comments

<'kellnr> The Private Crate Registry

https://kellnr.io/
1•weinzierl•2m ago•0 comments

ArsDigita University: 25 Years Later

https://medium.com/@tomhickerson/arsdigita-university-25-years-later-152d135441c3
1•tomh•3m ago•0 comments

Midnight social media curfew, infinite scrolling limits proposed for older teens

https://www.cnbc.com/2026/07/15/social-media-ban-uk-midnight-curfews-infinite-scroll-teens.html
2•1vuio0pswjnm7•4m ago•0 comments

Show HN: One MCP setup for 22 clients, with lazy tool discovery

https://github.com/tsouth89/toolport
1•tsouth2•5m ago•0 comments

Palmer Luckey: AI will make everything optimized John Carmack style

https://twitter.com/PalmerLuckey/status/2077216959930728889
1•momocowcow•5m ago•0 comments

TermCanvas – a tmux-backed canvas for steering AI agents (macOS)

https://github.com/lout33/termcanvas
1•yupanqui•7m ago•0 comments

All My Meters Said Innocent

https://ihnatz.github.io/2026/07/13/innocent.html
1•eugene0•7m ago•0 comments

Google urges EU top court to back ruling scrapping $1.7B antitrust fine

https://www.reuters.com/legal/litigation/google-urges-eu-top-court-back-ruling-scrapping-17-billi...
1•1vuio0pswjnm7•7m ago•0 comments

What's in America's Code

https://www.boozallen.com/expertise/cybersecurity/whats-in-americas-code.html
2•noyesno•7m ago•1 comments

Why FOSS Matters Socially

https://hamishcampbell.com/why-foss-matters-socially/
3•ExMachina73•7m ago•0 comments

SoftBank's Son says AI will need $5T per year by 2040, dismisses bubble talk

https://www.reuters.com/world/asia-pacific/softbanks-son-says-ai-will-need-5-trillion-per-year-by...
1•1vuio0pswjnm7•10m ago•0 comments

Sleep Regularity vs. Sleep Duration: Which Is a Better Predictor of Mortality?

https://www.neurologyadvisor.com/news/ssleep-regularity-vs-sleep-duration-which-is-a-better-predi...
1•bilsbie•11m ago•0 comments

Sleep regularity is a stronger predictor of mortality risk than sleep duration

https://academic.oup.com/sleep/article/47/1/zsad253/7280269
2•bilsbie•11m ago•0 comments

AI Chip Regulation Is Not a Dystopian Surveillance State

https://www.astralcodexten.com/p/ai-chip-regulation-is-not-a-dystopian
1•Sebb767•12m ago•1 comments

A Colorado River decision could trigger major water cuts

https://www.washingtonpost.com/climate-environment/2026/07/15/colorado-river-decision-could-trigg...
1•howard941•13m ago•0 comments

Memex – mindmap alternative to linkding, kerakeep and readeck

https://github.com/hasmeni/memex/tree/main
1•codecarter•15m ago•1 comments

Don't Fight AI

https://lukakopajtic.com/dont-fight-ai/
2•lukakopajtic•15m ago•1 comments

GLP-1 Receptor Agonists and Risk for Ischemic Optic Neuropathy

https://www.acpjournals.org/doi/10.7326/ANNALS-25-00860
2•bookofjoe•16m ago•0 comments

How I Turned AI to the Dark Side

https://spectrum.ieee.org/jailbreaking-llms
1•pseudolus•17m ago•0 comments

China economic growth falls sharply, missing target

https://www.bbc.com/news/articles/cd959x4edy8o
1•onemoresoop•18m ago•0 comments

The Phenomenon of 'Terminal Lucidity'

https://www.nytimes.com/2026/07/14/magazine/terminal-lucidity.html
1•ike_usawa•18m ago•0 comments

Extraction POC works on 10 documents and breaks on 10k

https://mwylot.net/post/extraction-poc-10-documents/
1•martin_martin•19m ago•0 comments

Wrap an LLM, charge $20, lose money: the pricing trap the model owners hit first

https://okaneland.com/study/unit-economics-of-wrapping-an-llm/
1•ermantrout•19m ago•0 comments

Filmgrab: Films A-Z

https://film-grab.com/movies-a-z/
1•hopelessluca•23m ago•0 comments

Why do people hate the tech industry? (2023)

https://www.sevarg.net/2023/03/25/why-people-hate-tech/
2•dsego•25m ago•1 comments

Midnight social media curfew proposed for UK teens aged 16 and 17

https://www.bbc.co.uk/news/articles/c982857nlrlo
1•chrisjj•29m ago•1 comments

Prioritize mental health, and why communication is so important

https://ramones.dev/posts/mental-health/
1•ramon156•29m ago•0 comments

Show HN: For 10 World Cups, my model's 2 favorites had the champion every time

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=7013338
1•fabioricardo7•30m ago•0 comments

Xmark: Chat with your saved X bookmarks

https://www.xmark.dev
1•jclvsh•31m ago•0 comments