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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!

Show HN: BlazeRules – vectorized YAML rules for JSON, Kafka, and Arrow events

1•jspuri•28s ago•0 comments

Laser Fault Injection on the TROPIC01 Open-Source Secure Element

https://donjon.ledger.com/blog/tropic01-laser-fault-injection/
1•ahlCVA•1m ago•0 comments

Optimistic Sync Library for the Web

https://therealpaulplay.github.io/PlaySocketJS/
1•PaulPlay•3m ago•0 comments

Another Taste of Verse [video]

https://www.youtube.com/watch?v=QIiU-QGzcqc&list=PLQtDWkrawhsE&index=2
1•mpweiher•4m ago•0 comments

Slople – can you pass the reverse Turing test?

https://unslop.run/slople
1•dopamine_daddy•10m ago•1 comments

What AI did to stackoverflow in a graph

https://data.stackexchange.com/stackoverflow/query/1953768#graph
2•secretslol•11m ago•0 comments

Why do AI company logos look like buttholes?

https://velvetshark.com/ai-company-logos-that-look-like-buttholes
1•miniBill•17m ago•0 comments

HAMgpt – what can I do with my radio today?

https://hamgpt.co
1•howard941•18m ago•0 comments

'The Odyssey' Backlash Failed Tremendously

https://www.wired.com/story/the-odyssey-backlash-failed-tremendously/
2•joozio•21m ago•1 comments

Fable 5 vs. GPT-5.6 Sol on an NP-Hard Problem: Does /goal help?

https://charlesazam.com/blog/fable-5-gpt-5-6-sol-goal/
1•couAUIA•23m ago•1 comments

Mr. Spock Does Not Code in ASCII

https://lqlang.org/blog/spock-does-not-code-in-ascii/
3•wickund•26m ago•0 comments

NextBSD project revived: macOS userland tools on FreeBSD kernel

https://www.theregister.com/os-platforms/2026/07/18/nextbsd-returns-to-dollop-apple-source-on-fre...
2•lproven•27m ago•0 comments

Steam Machine: Between 12k and 15k Units Sold per week

https://boilingsteam.com/steam-machine-between-10k-and-15k-sold-per-week/
2•ekianjo•27m ago•0 comments

There's any easy way to rename multiple photos at once

https://apps.microsoft.com/detail/9nl267vtkkmg?hl=en-US&gl=US
1•SolvyCode•30m ago•0 comments

GitHub: TypeScript compiler and JavaScript engine in Lean

https://github.com/jessealama/thales
2•fagnerbrack•38m ago•0 comments

Business Success: Luck, Not Merit

https://fagnerbrack.com/business-success-luck-not-merit-51deca80bfaf
1•fagnerbrack•38m ago•0 comments

Software Engineering Laws

https://newsletter.techworld-with-milan.com/p/the-20-software-engineering-laws
1•fagnerbrack•38m ago•0 comments

AG of Texas secured a settlement of bankruptcy claims against 23andMe

https://www.texasattorneygeneral.gov/news/releases/attorney-general-paxton-secures-150-million-se...
1•kythanh•41m ago•0 comments

The Htop for LLM Inference

https://github.com/helasaoudi/llm-inspector
2•helasaoudi•41m ago•0 comments

Continually aim just beyond your current range (2007)

https://terrytao.wordpress.com/career-advice/continually-aim-just-beyond-your-current-range/
1•dorjoy•43m ago•0 comments

Claude shows subtle biases to Anthropic across carefully controlled tests

https://twitter.com/owainevans_uk/status/2078149976807592112
1•nsagent•46m ago•0 comments

European Search Perspective

https://www.eu-searchperspective.com
1•Topfi•49m ago•0 comments

Neil Rimer thinks the AI money is coming back out

https://techcrunch.com/2026/07/17/neil-rimer-thinks-the-ai-money-is-coming-back-out/
1•adithyaharish•55m ago•0 comments

Ask HN: Having a child before career has taken off

2•lassearpe•56m ago•3 comments

Show HN: Forward-Only, Autograd-Free PINN with 0ns Zero-Copy Memory Interlock

https://github.com/PJHkorea/Forward_Only_Autograd_Free_PINN
1•PJHkorea•56m ago•1 comments

LG monitors silently install software through Windows Update without consent

https://videocardz.com/newz/lg-monitors-silently-install-software-through-windows-update-without-...
74•baranul•1h ago•14 comments

US lawmakers urge Trump administration to ban Chinese memory chips

https://www.ft.com/content/9e7cdf3c-2e52-492f-afeb-b63d86a53ce6
2•giuliomagnifico•1h ago•1 comments

IEA Warns World Has Just Weeks to Avoid Hormuz Economic Shock

https://oilprice.com/Latest-Energy-News/World-News/IEA-Warns-World-Has-Just-Weeks-to-Avoid-Hormuz...
4•baranul•1h ago•0 comments

Show HN: GPT-5.6 Sol vs. Claude Fable 5 in CNC Red Alert 2

https://system-2-arena.vercel.app/showcase/ra2?war=sol-vs-fable-lake
2•masterchef2209•1h ago•0 comments

Billion-dollar California salad company exploits undocumented migrants (2014)

https://www.theguardian.com/us-news/2014/nov/23/billion-dollar-california-salad-company-exploits-...
2•cramer4next•1h ago•0 comments