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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!

How big tobacco helped shape the design of ultra-processed foods

https://www.ucsf.edu/news/2026/06/432011/how-big-tobacco-helped-shape-design-ultra-processed-foods
1•hhs•50s ago•0 comments

Latent Agents: A Post-Training Procedure for Internalized Multi-Agent Debate

https://arxiv.org/abs/2604.24881
1•PaulHoule•1m ago•0 comments

Valve says it's ready to launch the Steam Machine this summer

https://www.theverge.com/games/943657/valve-steam-machine-frame-summer-launch-verified
1•droidjj•3m ago•0 comments

Introducing Boron Buckyballs: Theory that B80 cages can’t be made is disproved

https://cen.acs.org/materials/nanomaterials/buckyballs-boron-buckminster-fullerene-nanomaterials/...
1•crescit_eundo•4m ago•0 comments

Shouting in the Datacenter (2008) [video]

https://www.youtube.com/watch?v=tDacjrSCeq4
1•st_goliath•5m ago•0 comments

RIP Tech Interviews, Oxy Will Not Miss You

https://sageox.ai/blog/rip-tech-interviews
1•skadamat•5m ago•0 comments

White House will dump $700M of public funds into costly, unreliable coal again

https://electrek.co/2026/06/04/white-house-will-dump-700m-of-public-funds-into-costly-unreliable-...
1•Bender•5m ago•0 comments

Google releases fitbit air specs

https://support.google.com/googlehealth/thread/438625393/unleash-your-creativity-and-style-we%E2%...
1•subroutine•6m ago•0 comments

Flutter: macOS Malvertising Campaign Spreads New FlutterShell Backdoor

https://unit42.paloaltonetworks.com/flutterbridge-new-fluttershell-backdoor/
1•brazukadev•6m ago•0 comments

1ShotGen – Turn rough ideas into one-shot prompts for AI coding agents

https://1shotgen.com/
1•zachisparanoid•7m ago•0 comments

The rise of digital advertising and its economic implications (2024)

https://www.stlouisfed.org/on-the-economy/2024/oct/rise-digital-advertising-economic-implications
1•hhs•8m ago•0 comments

SpaceX IPO

https://spacexipo.com/
2•0xedb•11m ago•0 comments

The thorny question of work-life balance in European startups

https://www.ft.com/content/d8be5090-8b2f-46ce-a108-675d70b7ba8b
2•rustoo•12m ago•0 comments

Using Safetensors with Flax

https://www.gilesthomas.com/2026/06/flax-and-safetensors
1•gpjt•12m ago•0 comments

SpaceX, Other Mega IPOs Denied Fast Index Entry by S&P

https://www.bloomberg.com/news/articles/2026-06-04/s-p-dow-jones-keeps-megacap-ipo-rules-as-is-af...
4•tristanj•14m ago•1 comments

AI model predicts building fire spread, redirecting evacuees to safer exits

https://techxplore.com/news/2026-06-ai-redirecting-evacuees-safer-exits.html
1•lschueller•14m ago•0 comments

Shell, Awk, and Make Should Be Combined

https://www.oilshell.org/blog/2016/11/13.html
1•Chris2048•17m ago•0 comments

You want to build a Recommender System

https://knhash.in/recommender-system-in-prod/
1•kn81198•17m ago•0 comments

US Mint Steve Jobs coin sells out in just 11 minutes

https://appleinsider.com/articles/26/05/12/commemorative-us-mint-steve-jobs-coin-sells-out-in-jus...
3•ohjeez•18m ago•1 comments

Jujutsu v0.42.0 Released

https://github.com/jj-vcs/jj/releases/tag/v0.42.0
1•itskokeh•21m ago•1 comments

The skeptic's guide to humanoid robots going viral on the Internet

https://arstechnica.com/ai/2026/06/the-skeptics-guide-to-humanoid-robots-going-viral-on-the-inter...
1•dangle1•23m ago•0 comments

Show HN: Patina, an AI that learns your judgment, not just your tasks

https://github.com/Sanctum-Origo-Systems/patina
1•andywidjaja•23m ago•1 comments

Canada's CHU Will Go Silent on Shortwave on June 22, 2026

https://swling.com/blog/2026/05/canadas-chu-will-go-silent-on-shortwave-on-june-22-2026/
2•rmason•25m ago•1 comments

OWASP VulnerableApp Project: Break It. Scan It. Improve It

https://github.com/SasanLabs/VulnerableApp
2•newaccount12344•27m ago•0 comments

A one-parameter model that gets 100% on ARC-AGI-2

https://eitanturok.github.io/one-parameter-model/
2•jxmorris12•27m ago•0 comments

Training an Agentic Router for Optimal Cost-Performance on SWE Tasks

https://www.appliedcompute.com/research/training-an-agentic-router
2•matt_d•27m ago•0 comments

Symbiotic fungi underlie the regeneration potential of island rainforests

https://www.cell.com/current-biology/fulltext/S0960-9822(26)00435-5
3•PaulHoule•33m ago•0 comments

Ask HN: Hey, you, tech worker–how are you feeling?

2•arm32•35m ago•3 comments

ClawQueue – Open-source GitHub issue dispatcher for human-agent teams

https://github.com/ClawQueue/ClawQueue
2•clawqueue•36m ago•0 comments

Move Fast, Surveil Things

https://www.eff.org/deeplinks/2026/06/move-fast-surveil-things
7•hn_acker•42m ago•0 comments