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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•9mo 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!

Show HN: Fan Meter – A movie quiz game where you guess films from frames

https://fanmeter.in
1•raahelb•1m ago•0 comments

Optimize_anything: A Universal API for Optimizing Any Text Parameter

https://gepa-ai.github.io/gepa/blog/2026/02/18/introducing-optimize-anything/
1•LakshyAAAgrawal•1m ago•1 comments

So Claude's stealing our business secrets, right?

1•arm32•1m ago•0 comments

Laws of Thermodynamics

https://en.wikipedia.org/wiki/Laws_of_thermodynamics
1•downboots•2m ago•0 comments

Giving Claude Code Eyes: Round-Trip Screenshot Testing

https://medium.com/@rotbart/giving-claude-code-eyes-round-trip-screenshot-testing-ce52f7dcc563
1•rotbart•3m ago•1 comments

We Have (Software) Replicators

https://schappi.com/blog/we-have-software-replicators
1•schappim•5m ago•0 comments

Iterflow – Composable streaming statistics for JavaScript/TS

https://www.npmjs.com/package/@mathscapes/iterflow
1•gvsh_maths•8m ago•1 comments

Show HN: Madari: CLI tool to install, sync and manage local MCP servers

https://github.com/ankitvg/madari/releases/tag/v0.1.1
1•rajma•9m ago•0 comments

Mathematics in the Library of Babel

https://www.daniellitt.com/blog/2026/2/20/mathematics-in-the-library-of-babel
1•owenpayton•9m ago•0 comments

Tech Influencers Slam Hacker News Toxicity After OpenAI Hire Attacks

https://x.com/i/trending/2025399179196203524
1•make_it_sure•12m ago•0 comments

HTTP/3 on FreeBSD: Getting QUIC Working with Nginx in a Bastille Jail

https://blog.hofstede.it/http3-on-freebsd-getting-quic-working-with-nginx-in-a-bastille-jail/
1•todsacerdoti•15m ago•0 comments

Ask HN: Is HN becoming more toxic?

2•make_it_sure•19m ago•1 comments

Show HN: TurboDraft – fast Ctrl-G prompt editor for Claude Code and Codex CLI

https://github.com/gradigit/turbodraft
2•gradigit•30m ago•0 comments

Built a Tinder-style investing app for all investors! Need 7-day beta testers

https://investswipe-demo-v1.vercel.app/
1•barelybushy•33m ago•1 comments

Show HN: Sketch Paint for Apple

https://apps.apple.com/us/app/sketch-paint/id6753883078
1•Codegres•33m ago•0 comments

DHS Will Suspend TSA PreCheck and Global Entry

https://www.washingtonpost.com/nation/2026/02/21/tsa-precheck-global-entry-shutdown/
2•jbegley•34m ago•2 comments

Welcome to the Era of Anarchic Antitrust

https://www.economist.com/business/2026/02/18/welcome-to-the-era-of-anarchic-antitrust
1•1vuio0pswjnm7•37m ago•0 comments

Show HN: LogSnap – CLI tool for analyzing logs locally

https://github.com/Sonic001-h/logsnap
1•baba_yaga070•39m ago•0 comments

Climate Physicists Face the Ghosts in Their Machines: Clouds

https://www.quantamagazine.org/climate-physicists-face-the-ghosts-in-their-machines-clouds-20260220/
1•tzury•41m ago•0 comments

Calculemus: Why policy has correct answers and nobody wants to find them

https://kunnas.com/articles/calculemus
1•ekns•44m ago•0 comments

Today is my last day at Anthropic

https://twitter.com/mrinanksharma/status/2020881722003583421
1•RyanShook•47m ago•1 comments

Testing the Pugilism Hypothesis for the Evolution of Human Facial Hair

https://pubmed.ncbi.nlm.nih.gov/33791549/
2•SEJeff•48m ago•0 comments

Astronomical Ceiling of Senenmut's Tomb

https://en.wikipedia.org/wiki/Astronomical_ceiling_of_Senenmut%27s_Tomb
1•slater•49m ago•0 comments

The importance of limiting syndication feed requests in some way

https://utcc.utoronto.ca/~cks/space/blog/web/FeedLimitingImportance
4•LorenDB•49m ago•0 comments

Monitor your world with one daily report

https://monitorish.com/
1•chaisan•52m ago•0 comments

Iranian Students Protest as Anger Grows

https://www.wsj.com/world/middle-east/iranian-students-protest-as-anger-grows-89a6a44e
6•JumpCrisscross•53m ago•0 comments

Sam Altman would like remind you that humans use a lot of energy, too

https://techcrunch.com/2026/02/21/sam-altman-would-like-remind-you-that-humans-use-a-lot-of-energ...
5•manicennui•59m ago•3 comments

JPMorgan concedes it closed Trump's accounts after Jan. 6 attack

https://apnews.com/article/trump-jpmorgan-dimon-debanking-2e0db127f360e5dbe1d3cc975dd73703
4•linhns•1h ago•0 comments

Stillpoint MCP – Delivering encouragement messages improves model results

https://www.modelwelfare.xyz/
1•henry700•1h ago•0 comments

Show HN: Rust blockchain with sharded propagation and post-quantum signatures

https://alphanumeric.blue/
2•invar1ant•1h ago•0 comments