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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!

Distributed Identity

https://jyn.dev/distributed-identity/
1•speckx•3m ago•0 comments

Side projects, kids, full time job

https://twitter.com/JordanMorgan10/status/2091934796926627863
1•eric_khun•3m ago•0 comments

Huge Pages Can Improve PostgreSQL Performance

https://clickhouse.com/blog/huge-pages-clickhouse-managed-postgres
1•saisrirampur•4m ago•0 comments

Show HN: Wirespan, a daily power grid optimization puzzle

https://wirespan.app/?r=hn
1•dualarte•4m ago•0 comments

Is Starlink a Secret Radar Constellation? [video]

https://www.youtube.com/watch?v=jbp3kdJZ1_A
1•fortran77•7m ago•0 comments

Volcanoes that made history

https://knowablemagazine.org/content/article/physical-world/2026/volcanoes-that-made-history
2•flabber•10m ago•0 comments

Mark Cuban, worth more than $10B, has a bold plan to tackle wealth inequa

https://economictimes.indiatimes.com/news/international/global-trends/mark-cuban-worth-more-than-...
1•newsomix9xl•10m ago•1 comments

Supermicro Super AI Station (GB300, 20 Pflops FP4, 748GB Coherent Memory)

https://www.supermicro.com/en/accelerators/nvidia/super-ai-station
2•peter_d_sherman•11m ago•1 comments

French firms & Rheinmetall AG targeted by Chinese export controls

https://www.intelligenceonline.com/asia-pacific/2026/08/25/three-french-firms-targeted-by-beijing...
1•alephnerd•11m ago•0 comments

It's Been 20 Years Since Astronomers Decided Pluto Isn't a Planet

https://www.cnet.com/science/space/20-years-since-astronomers-decided-pluto-isnt-a-planet/
2•speckx•15m ago•0 comments

Headlong: A Microharness for Persistent Agents

https://www.laude.org/updates/headlong-a-microharness-for-persistent-agents
6•lbw1215•26m ago•1 comments

AI algorithm for room temperature superconductor, candidate detected

https://zenodo.org/records/22073633
1•tsagaansuld•27m ago•0 comments

Ask HN: What's the current state of Quantum Vulnerability

1•vednig•27m ago•0 comments

'Normal' research trap limits EU scientific breakthroughs, disruptive innovation

https://www.researchgate.net/publication/408700233_A_%27normal%27_research_trap_limits_scientific...
1•musha68k•31m ago•0 comments

Decentralized Universal Computer

https://github.com/Skills03/universal-computer
4•RIshabh235•33m ago•1 comments

Ask HN: Good large format (>20 inches) touchscreen E-Paper display options?

8•foota•34m ago•2 comments

Self host sheets, docs, drive, email

1•smalltorch•35m ago•0 comments

Show HN: JSON Support – Free JSON and CSV to Excel Conversion Without Signups

https://www.jsonsupport.com/
1•Sharanxxxx•48m ago•0 comments

Have We Forgotten How to Design?

https://lmnt.me/blog/have-we-forgotten-how-to-design.html
3•maguay•50m ago•0 comments

Amazon EC2 Beta (20 years ago)

https://aws.amazon.com/blogs/aws/amazon_ec2_beta/
3•jeffbarr•52m ago•0 comments

Sleepwalker: Passive Backdoor with Its Own Command Language

https://r136a1.dev/2026/08/24/sleepwalker-a-passive-backdoor-with-its-own-command-language/
3•defrost•54m ago•0 comments

Show HN: Safepine OS – A Quantitative Finance Engine in D Language (LGPL)

https://safepine.co/
1•safepine•57m ago•0 comments

How to Design an Animation

https://kciter.so/posts/how-to-design-animation/en/
2•kciter•1h ago•1 comments

Show HN: How to Fish Wiki – Bosses, Fish and Guides

https://how-to-fish-game.wiki
1•light001•1h ago•0 comments

Right-Sized Language Model

https://joecooper.me/blog/cpuhaiku/
2•thatjoeoverthr•1h ago•0 comments

NYC's 911 System Had an Outage. Officials Kept Quiet About It

https://www.nytimes.com/2026/08/24/nyregion/mamdani-911-outage-nyc.html
4•ChrisArchitect•1h ago•2 comments

SiFive's First Server Platform

https://chipsandcheese.com/p/sifives-first-server-platform
2•geerlingguy•1h ago•0 comments

Nvidia Is Spending $6B to Build a Powerful U.S. Alternative to Chinese AI

https://www.wsj.com/tech/ai/nvidia-is-spending-6-billion-to-build-a-powerful-u-s-alternative-to-c...
6•Charles_Wdy•1h ago•0 comments

Show HN: Probability calibration that doesn't flatten your scores

https://github.com/finite-sample/calibre
1•neehao•1h ago•0 comments

The dementia vaccine some of us are taking without realising

https://www.sciencefocus.com/the-human-body/dementia-vaccine-taking-without-realising
5•bananamogul•1h ago•1 comments