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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!

Continental Power, Maritime Power, and the Fight for a New World Order

https://www.foreignaffairs.com/united-states/land-or-sea-paine
1•mooreds•2m ago•1 comments

Ten Ways to Fool the Masses When Presenting Battery Research (2021)

https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/batt.202100154
1•johlo•3m ago•0 comments

Why AI Mentions Brands More Than It Recommends Them, and What That Means for SEO

https://www.flygen.ai/
1•AaronMeslin•3m ago•1 comments

The case for active management when so few outperform the S&P 500

https://www.startribune.com/s-and-p-500-index-stock-market-outperform-active-managed-fund-tech-ai...
1•mooreds•3m ago•0 comments

As the Arctic warms up, the race to control the region is growing ever hotter

https://theconversation.com/as-the-arctic-warms-up-the-race-to-control-the-region-is-growing-ever...
1•PaulHoule•3m ago•0 comments

AI Tribalism

https://nolanlawson.com/2026/01/24/ai-tribalism/
1•todsacerdoti•4m ago•0 comments

Gulbenkian Prize for Humanity

https://gulbenkian.pt/en/the-foundation/gulbenkian-prize-for-humanity/
1•mooreds•7m ago•0 comments

The Math on AI Agents Doesn't Add Up

https://www.wired.com/story/ai-agents-math-doesnt-add-up/
3•paulpauper•8m ago•0 comments

Show HN: Convert Word/Excel/PDF Invoices to XRechnung (German 2025 Mandate)

https://www.e-rechnung.tools/
1•melnce•9m ago•0 comments

Okta warns of multiple vishing attacks that can defeat MFA

https://www.scworld.com/news/okta-warns-of-multiple-vishing-attacks-that-can-defeat-mfa
2•Bender•10m ago•0 comments

Ed tech is profitable. It is also mostly useless

https://www.economist.com/united-states/2026/01/22/ed-tech-is-profitable-it-is-also-mostly-useless
2•paulpauper•11m ago•0 comments

Gmail, Facebook and other account credentials exposed

https://www.scworld.com/news/millions-of-gmail-facebook-and-other-account-credentials-exposed
2•Bender•11m ago•0 comments

A CLI to Tame OWASP Dependency-Track Version Sprawl in CI/CD

https://github.com/MedUnes/dtrack-cli
2•medunes•13m ago•1 comments

Tiny BASIC: An Early Free Software Project

https://www.youtube.com/watch?v=FirGzw9nTTk
1•WoodenChair•14m ago•0 comments

Poland's energy grid was targeted by never-before-seen wiper malware

https://arstechnica.com/security/2026/01/wiper-malware-targeted-poland-energy-grid-but-failed-to-...
4•Bender•14m ago•0 comments

New catalyst makes plastic upcycling 10x more efficient than platinum

https://www.sciencedaily.com/releases/2026/01/260124003806.htm
3•westurner•14m ago•0 comments

Show HN: Modbhold – Vanilla JavaScript open source browser game

https://agentratelimit.github.io/Mobhold/
1•skinnyasianboi•15m ago•0 comments

The Writers Came at Night

https://www.metropolitanreview.org/p/the-writers-came-at-night
4•ctoth•18m ago•0 comments

When two years of academic work vanished with a single click

https://www.nature.com/articles/d41586-025-04064-7
1•bsoles•19m ago•0 comments

Debugging Google Ads conversion tracking by observing real consent behavior

2•marstay•25m ago•1 comments

Modern Memory Bandwidth and Latency Benchmarks

https://github.com/SpareCores/sc-membench
1•tanelpoder•29m ago•0 comments

CATL set to launch first sodium-ion batteries in passenger vehicles

https://electrek.co/2026/01/23/ev-battery-leader-plans-first-sodium-ion-batteries-passenger-cars/
4•ksec•30m ago•1 comments

Show HN: A GTK app for Linux to show file buffer progress

1•dcminter•31m ago•0 comments

Show HN: Pingaroo – a tiny native macOS menu bar app for network stats

https://github.com/mallochio/pingaroo
4•mallochio•34m ago•0 comments

Ask HN: Are you using Clawdbot? What are your use cases?

2•amrrs•35m ago•0 comments

Davos 2026: Special Address by Mark Carney, Prime Minister of Canada

https://www.weforum.org/stories/2026/01/davos-2026-special-address-by-mark-carney-prime-minister-...
7•lemming•36m ago•0 comments

Sloponomics: Who wins and loses in the AI-content flood?

https://www.economist.com/business/2025/10/16/sloponomics-who-wins-and-loses-in-the-ai-content-flood
1•paulpauper•38m ago•0 comments

Show HN: AI agent to create small PRs from Slack

2•owendarko•39m ago•0 comments

What Happened to X? [video]

https://www.youtube.com/watch?v=6TTE8g4ouBk
2•Kapura•40m ago•0 comments

The Unreasonable Effectiveness of Failure

https://benoitessiambre.com/fail.html
3•BenoitEssiambre•40m ago•0 comments