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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!

Why NUKEMAP isn't on Google Maps anymore

https://blog.nuclearsecrecy.com/2019/12/13/why-nukemap-isnt-on-google-maps-anymore/
1•fanf2•30s ago•0 comments

V8 vs. Spidermonkey, or Firefox Processes 200k Years Where Chrome Fails

https://old.reddit.com/r/firefox/comments/1qc4hfm/v8_vs_spidermonkey_or_firefox_processes_200k/
1•csmantle•31s ago•0 comments

Show HN: Most app ideas fail, so I built a list of apps that work

https://clonetheapp.vercel.app
1•hasibhaque•1m ago•0 comments

Edsel Ford's Art Deco Hot Rod Gets Remade in Carbon Fiber

https://www.thedrive.com/news/edsel-fords-art-deco-hot-rod-gets-remade-in-carbon-fiber
1•PaulHoule•3m ago•0 comments

2 in 3 Americans Are Still Making These Dangerous Password Mistakes in 2026

https://www.passwordmanager.com/2-in-3-americans-are-still-making-these-obvious-and-dangerous-pas...
1•giuliomagnifico•5m ago•0 comments

Claude is down – Jan 14th 2026

1•rubymamis•11m ago•0 comments

Are Seed Oils Bad for You? Debunking a Viral Social Media Myth

https://www.scientificamerican.com/podcast/episode/are-seed-oils-bad-for-you-debunking-a-viral-so...
1•quapster•11m ago•0 comments

Matthew McConaughey Trademarks Himself to Fight AI Misuse

https://www.wsj.com/tech/ai/matthew-mcconaughey-trademarks-himself-to-fight-ai-misuse-8ffe76a9
1•impish9208•12m ago•1 comments

The Six Patterns That Cover Everything

https://github.com/siy/coding-technology/blob/main/articles/six-patterns-that-cover-everything.md
1•siy•12m ago•1 comments

China's customs agents told Nvidia's H200 chips are not permitted

https://www.reuters.com/world/china/chinas-customs-agents-told-nvidias-h200-chips-are-not-permitt...
2•zerosizedweasle•12m ago•0 comments

All you need is Wide Events, not "Metrics, Logs and Traces" (2024)

https://isburmistrov.substack.com/p/all-you-need-is-wide-events-not-metrics
1•tosh•13m ago•0 comments

Marine Snow

https://en.wikipedia.org/wiki/Marine_snow
1•thunderbong•14m ago•0 comments

Ask HN: Personal website featured on HN, list of restaurants in NYC

1•laffOr•14m ago•0 comments

Netflix 'plans to switch to all-cash offer to seal $83B Warner Bros deal'

https://www.theguardian.com/film/2026/jan/14/netflix-plans-to-switch-to-all-cash-offer-to-seal-wa...
2•beardyw•18m ago•0 comments

Software Development and Modeling in the Age of Artificial Intelligence

https://download.ssrn.com/2025/12/9/5881104.pdf?response-content-disposition=inline&X-Amz-Securit...
1•ahoibakk•18m ago•0 comments

Senate passes a bill that would let nonconsensual deepfake victims sue

https://www.theverge.com/news/861531/defiance-act-senate-passage-deepfakes-grok
1•smurda•21m ago•0 comments

Does anyone know who currently owns Graphic (formerly Autodesk Graphic)?

https://graphic.com
1•mattkevan•22m ago•1 comments

Debunking the 'Three Pillars of Observability' Myth (2021)

https://softwareengineeringdaily.com/2021/02/04/debunking-the-three-pillars-of-observability-myth/
1•tosh•23m ago•0 comments

How to write a good spec for AI agents

https://addyosmani.com/blog/good-spec/
2•cdrnsf•23m ago•0 comments

How to get banned from Facebook in one simple step

https://nibblestew.blogspot.com/2026/01/how-to-get-banned-from-facebook-in-one.html
1•ibobev•25m ago•0 comments

You Need a Kitchen Slide Rule

https://entropicthoughts.com/kitchen-slide-rule
1•ibobev•26m ago•0 comments

Show HN: DailySpace, Android app for exploring space photos and rocket launches

https://play.google.com/store/apps/details?id=com.daily.space&hl=en_US
4•DailySpace•26m ago•4 comments

Parallel Primitives for Multi-Agent Workflows

https://fergusfinn.com/blog/parallel-primitives-blog/
1•mezark•27m ago•0 comments

No Bloom? No Problem: Glowing Stuff Without Post Effects

https://www.patreon.com/posts/no-bloom-no-post-53965598
1•ibobev•27m ago•0 comments

Servo 2025 Stats

https://blogs.igalia.com/mrego/servo-2025-stats/
27•todsacerdoti•27m ago•2 comments

Event Sourcing with GenesisDB CE Now Available on Uberspace

https://lab.uberspace.de/guide_genesis-db/
1•patriceckhart•29m ago•0 comments

Unemployed almost a year after graduating MIT – a rant

6•TimGubth•32m ago•5 comments

Build Your OT Toolbox: It's Dangerous to Go Alone, So Take These Tools

https://www.emberot.com/resources/blog/build-your-ot-toolbox/
1•TheWiggles•32m ago•0 comments

Ask HN: Did Glassdoor figure out your identity?

1•penguin_booze•35m ago•0 comments

Show HN: Hirebetter.io – AI tools to reduce manual recruiter work

https://hirebetter.io
1•tomgreef•36m ago•0 comments