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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•8mo 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!

Galileo Navigation Message Authentication looking forward

https://insidegnss.com/galileo-osnma-looking-forward/
1•Harvesterify•39s ago•0 comments

The problem with pretending quantum mechanics makes sense – Sean Carroll [video]

https://www.youtube.com/watch?v=u9YiM7LZ6b0
1•amichail•57s ago•0 comments

Apple reportedly replacing Siri interface with chatbot experience for iOS 27

https://9to5mac.com/2026/01/21/apple-reportedly-replacing-siri-interface-with-actual-chatbot-expe...
1•badc0ffee•1m ago•0 comments

Take potentially dangerous PDFs, and convert them to safe PDFs

https://github.com/freedomofpress/dangerzone
2•dp-hackernews•9m ago•1 comments

Where I find free game assets (compiled my go-to sources)

https://assethoard.com/blog/where-to-find-free-game-assets-2026
1•markyg•11m ago•1 comments

Impact of AI on the 2025 Software Engineering Job Market (2025)

https://www.sundeepteki.org/advice
1•lopespm•13m ago•0 comments

Fiat Lux – UFO Religion

https://en.wikipedia.org/wiki/Fiat_Lux_(UFO_religion)
1•dmonay•17m ago•0 comments

Gemini AI assistant tricked into leaking Google Calendar data

https://www.bleepingcomputer.com/news/security/gemini-ai-assistant-tricked-into-leaking-google-ca...
1•greyadept•18m ago•0 comments

Ask HN: Motion Blur Detector Library/Package

1•notlikeus•20m ago•0 comments

Show HN: ShipShared – Breaking the "distribution wall" for micro-SaaS

https://shipshared.link
1•markyd•21m ago•0 comments

Brain on ChatGPT: Accumulation of Cognitive Debt When Using an AI Assistant

https://www.media.mit.edu/publications/your-brain-on-chatgpt/
2•misswaterfairy•21m ago•1 comments

Show HN Guidelines

https://news.ycombinator.com/yli.html
2•cjbarber•23m ago•0 comments

Show HN: Squadsure a free tool for volunteer sports committees

https://squadsure.com
1•chocoboaus3•24m ago•0 comments

PassLLM – World's most accurate AI-based password guesser

https://github.com/Tzohar/PassLLM
1•Plarsy•30m ago•1 comments

Show HN: Syntux - build generative UIs for the web.

https://www.getsyntux.com/
2•TheDever•32m ago•0 comments

Hacking WhiteDate [video]

https://www.youtube.com/watch?v=lJsS8lqCpwU
1•subjektivation•33m ago•0 comments

RadOps is a multi-agent platform for automated DevOps workflows

https://github.com/mehrdadrad/radops
1•mehrdadrad•33m ago•0 comments

The surprising windfall that airlines could reap from weight-loss drugs

https://www.washingtonpost.com/transportation/2026/01/21/weight-loss-drugs-airlines-fuel-savings/
3•bookofjoe•35m ago•1 comments

Lords defy Government with crushing vote to ban social media for under-16s

https://www.upday.com/uk/politics/lords-defy-government-with-crushing-vote-to-ban-social-media-fo...
2•chrisjj•36m ago•1 comments

Microsoft's Nadella: AI needs 'social permission' to consume so much energy

https://www.politico.com/news/2025/12/01/microsofts-nadella-says-ai-must-earn-social-permission-t...
1•cstever•41m ago•2 comments

Delay / Disruption Tolerant Networking for deep space communications

https://www.nasa.gov/communicating-with-missions/delay-disruption-tolerant-networking/
1•voxadam•41m ago•0 comments

The Future of Development: Running Firecracker MicroVMs on Your MacBook Pro M3

https://u3n.medium.com/the-future-of-development-is-here-running-firecracker-microvms-on-your-mac...
2•thenaturalist•44m ago•0 comments

After 40 years, Nintendo's Kensuke Tanabe is retiring

https://hanafuda.report/articles/kensuke-tanabe-is-retiring-here-are-all-the-nintendo-games-he-ha...
3•brandrick•47m ago•0 comments

Shiseido's Fall and Did You Know China Has an Industrial Policy for Lipstick?

https://www.governance.fyi/p/shiseidos-fall-japanese-cosmetics
6•guardianbob•48m ago•0 comments

Email from Family in Minnesota

https://inessential.com/2026/01/21/email-from-minnesota-family.html
10•tastyface•48m ago•0 comments

Lynx R2 Mixed Reality Headset

https://lynx-r.com/
1•LorenDB•48m ago•0 comments

Long-Term InSAR Monitoring of Groundwater: Insights from the Hollywood Basin

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024WR039161
1•PaulHoule•49m ago•0 comments

Show HN: A distribution-first incubator for solo and small-team B2C apps

https://twitter.com/clover_ye/status/2014096525836566979
1•tuye0305•51m ago•0 comments

I built a multi-touch attribution engine that detects ChatGPT and "Dark" traffic

https://www.Zyro.world/
1•edwardglush•52m ago•2 comments

The Battle for One of the Richest and Smallest Counties in Texas

https://www.newyorker.com/news/letter-from-the-southwest/the-battle-for-one-of-the-richest-and-sm...
3•coloneltcb•52m ago•1 comments