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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!

PISIGuard: Protect your personal and sensitive info when you chat with AI

https://github.com/mohamed--abdel-maksoud/pisiguard
1•mohamed_am83•9m ago•0 comments

Show HN: SaaS payment integration in ~10 lines of code

https://github.com/paycan-app/paycan
3•mehraban•14m ago•0 comments

Steam Hardware and Software Survey: July 2026

https://store.steampowered.com/hwsurvey/Steam-Hardware-Software-Survey-Welcome-to-Steam
2•uneven9434•14m ago•0 comments

The true power of regular expressions (2012)

https://www.npopov.com/2012/06/15/The-true-power-of-regular-expressions.html
1•uneven9434•16m ago•0 comments

The Semantic Web, syllogism, and worldview. (2003)

http://shirky.com/essays/the-semantic-web-syllogism-and-worldview/
1•fanf2•21m ago•0 comments

I created a playground for 110 database systems

https://clickhouse.com/blog/clickbench-playground
2•soheilpro•24m ago•0 comments

Implementing a Funding Rate Arbitrage Strategy with Minute-Level Backtesting

https://medium.com/@DolphinDB_Inc/profiting-from-perpetuals-implementing-a-funding-rate-arbitrage...
2•yiweileng•24m ago•1 comments

Show HN: Hacker News CLI

https://github.com/ViktorRingnes/hackernews
2•viktorringnes•24m ago•0 comments

When the Future Doesn't Need Us

https://borretti.me/article/when-the-future-doesnt-need-us
2•reasonableklout•26m ago•0 comments

Weighing the Business Case for Quality

https://allenpike.com/2026/finding-a-business-case-for-quality/
2•ingve•27m ago•0 comments

Show HN: We Fixed UniFi's Slow PPPoE Performance with PPPoE Half-Bridge

https://arcbox.dev/blog/unifi-pppoe-half-bridge-acceleration
2•uneven9434•29m ago•0 comments

Free Press Release Sites List

https://galaxyonknowledge.substack.com/p/what-are-press-release-sites-free
2•galaxyonknowled•33m ago•0 comments

Bonsai: Janestreet's UI Library

https://github.com/janestreet/bonsai
12•KolmogorovComp•33m ago•0 comments

Team America: Yen Police

https://www.ft.com/content/f6d563ee-9238-4f82-a848-79f2478326bd
2•JumpCrisscross•33m ago•0 comments

AI Is a Race Car, Not Autopilot

https://ryansouthgate.com/ai-is-a-racecar/
2•ry8806•38m ago•0 comments

AI slop blocked a real $200K macOS flaw

https://the-decoder.com/a-real-macos-flaw-worth-200k-went-unreported-because-apples-bug-bounty-in...
3•BlueBerry2001•39m ago•0 comments

The Java Story – The Official Documentary [video]

https://www.youtube.com/watch?v=ZqGSg4b_cZA
2•chillax•51m ago•0 comments

CodeBot: Full details on our New AI for Delphi

https://blogs.remobjects.com/2026/07/30/codebot-the-story/
7•vintagedave•53m ago•1 comments

Most Australian teens on social media three months after under-16 ban began

https://www.japantimes.co.jp/news/2026/07/31/asia-pacific/australia-teens-social-media-ban/
2•01-_-•53m ago•0 comments

1 in 4 people in Japan believes AI could replace friends and family: poll

https://www.japantimes.co.jp/news/2026/08/02/japan/poll-ai-replace-friends-family/
7•01-_-•55m ago•1 comments

GLP-1s and their unknown impacts on human creativity

https://hereisyourbrain.substack.com/p/should-we-all-take-glp1
2•prdgl_daughter•55m ago•0 comments

Faster floating point math with Rust's new API

https://pythonspeed.com/articles/faster-float-math-rust/
2•birdculture•55m ago•0 comments

Don't Take the Black Pill (Text Adaptation)

https://andrewkelley.me/post/dont-take-black-pill.html
3•gabrielgio•56m ago•0 comments

Octane – React's programming model, compiled

https://octanejs.dev
8•nnx•59m ago•0 comments

Can Animals Be Right- or Left-Pawed?

https://www.discovermagazine.com/the-animal-kingdom-is-full-of-righties-and-lefties-42164
2•thunderbong•1h ago•0 comments

Travel

https://www.google.com/
2•BrentLakin•1h ago•1 comments

How to Switch from Windows to Linux

https://sprune.com/blog/how-to-switch-from-windows-to-linux/
2•nreece•1h ago•1 comments

Show HN: Daily Math Puzzle

https://dozenal.game
2•sarreph•1h ago•0 comments

Police Surveillance Technology: Last Week Tonight with John Oliver (HBO) [video]

https://www.youtube.com/watch?v=lnBPhelCdWE
4•jhonovich•1h ago•0 comments

Pipe – A runtime where AI operations are language primitives

https://pipe-lang.com
2•harrymachura•1h ago•0 comments