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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•7mo 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!

Cold and lithium delay forgetting of olfactory memories in C. elegans

https://www.nature.com/articles/s41593-025-02143-6
1•bookofjoe•45s ago•0 comments

What If the Satanic Panic Had Never Happened?

http://grognardia.blogspot.com/2025/12/what-if-satanic-panic-had-never-happened.html
1•speckx•52s ago•0 comments

Cursor Acquires Graphite

https://fortune.com/2025/12/19/cursor-ai-coding-startup-graphite-competition-heats-up/
1•gen220•58s ago•0 comments

Advent of the Underbar

https://perladvent.org/2025/2025-12-19.html
1•oalders•2m ago•1 comments

Show HN: Z-Image Desktop App with MPS and Vulkan Acceleration

https://github.com/WaveSpeedAI/wavespeed-desktop
1•chengzeyi•2m ago•0 comments

Show HN: How to Make More Money from the Same Website Traffic

https://getrevdock.com/blog/how-to-make-more-money-from-the-same-website-traffic
1•imadjourney•2m ago•0 comments

Rcarmo/steward: AI can now create itself, even inside your Raspberry Pi

https://github.com/rcarmo/steward
1•rcarmo•3m ago•0 comments

They Get Wheeled on Flights and Walk Off. Praise 'Jetway Jesus.'

https://www.wsj.com/lifestyle/travel/jetway-jesus-wheelchair-passengers-miracle-flights-0eaccfb3
1•dctoedt•8m ago•0 comments

Protein Rejuvenates Aging Mice Immune Systems

https://ashpublications.org/blood/article/146/23/2765/547160/Platelet-factor-4-regulates-hematopo...
1•stevenjgarner•9m ago•0 comments

James Webb Space Telescope confirms first 'runaway' supermassive black hole

https://www.space.com/astronomy/black-holes/james-webb-space-telescope-confirms-1st-runaway-super...
1•smurda•9m ago•0 comments

Life Without a Violent Act

https://thefacthunter.substack.com/p/life-without-a-violent-act
1•huijzer•9m ago•0 comments

A Reddit tipster cracked the Brown University and MIT shooting cases

https://www.nbcnews.com/news/us-news/reddit-tipster-cracked-brown-university-mit-shooting-cases-r...
2•dctoedt•10m ago•0 comments

Native Htmx in Drupal 11.3.0: Rich UX with up to 71% less JavaScript

https://www.drupal.org/about/core/blog/drupal-1130-biggest-performance-boost-in-a-decade
1•dallen33•11m ago•1 comments

The 'Ondes-Martenot' Maurice Martenot, France, 1928

https://120years.net/the-ondes-martenotmaurice-martenotfrance1928/
1•andsoitis•11m ago•0 comments

Fair Use Is a Right. Ignoring It Has Consequences

https://www.eff.org/deeplinks/2025/12/fair-use-right-ignoring-it-has-consequences
1•hn_acker•13m ago•0 comments

Cloudflare Incident Detected

https://www.cloudflarestatus.com/incidents/dz87vqwvl8wr
1•Multicomp•13m ago•2 comments

Bitcoin: A Peer-to-Peer Electronic Cash System (2009) [pdf]

https://bitcoin.org/bitcoin.pdf
1•chistev•15m ago•1 comments

Show HN: SyncKit – TLA+ verified CRDT for local-first apps (zero unsafe Rust)

https://github.com/Dancode-188/synckit/releases/tag/v0.2.2
1•danbitengo•16m ago•1 comments

The AI Revolution: The Road to Superintelligence

https://waitbutwhy.com/2015/01/artificial-intelligence-revolution-1.html
1•airhangerf15•16m ago•1 comments

What if your favorite platform died? How I'm trying to build software that lasts

https://eventuallymaking.io/p/what-if-your-favorite-platform-died-how-i-m-trying-to-build-softwar...
1•hlassiege•18m ago•1 comments

Show HN: Cloudflare-like are you human check using Apache mod_rewrite

https://github.com/splitbrain/botcheck
1•splitbrain•19m ago•0 comments

Dismantling Defenses: Trump 2.0 Cyber Year in Review

https://krebsonsecurity.com/2025/12/dismantling-defenses-trump-2-0-cyber-year-in-review/
2•todsacerdoti•20m ago•0 comments

Docker Makes 1k Hardened Images Free and Open Source

https://www.securityweek.com/docker-makes-1000-hardened-images-free-and-open-source/
1•Bender•23m ago•1 comments

144 MPH Wind Gust On Wednesday One Of The Strongest Ever Recorded in Wyoming

https://cowboystatedaily.com/2025/12/18/144-mph-wind-gust-is-strongest-ever-recorded-in-wyoming/
1•Bender•24m ago•0 comments

Two space startups prove you don't need to break the bank to rendezvous in space

https://arstechnica.com/space/2025/12/two-space-startups-prove-you-dont-need-to-break-the-bank-to...
2•Bender•25m ago•0 comments

The future of AI: What will your life look like in 2035?

https://www.theguardian.com/technology/ng-interactive/2025/dec/19/what-will-your-life-look-like-i...
1•trocado•26m ago•0 comments

Mirror_bridge: Outrunning V8, PyPy, and LuaJIT with C++26 Reflection

https://chico.dev/Mirror-Bridge-Multi-Language/
1•fthiesen•29m ago•0 comments

Fastmail increases subscription cost to $6/month

https://files.catbox.moe/4d7r53.png
7•yesitcan•31m ago•3 comments

Austria's top court rules Meta's ad model illegal

https://www.reuters.com/sustainability/boards-policy-regulation/austrias-top-court-rules-metas-ad...
5•fisian•33m ago•0 comments

Nano Banana Prompt Library

https://bananaai.pro/prompts
1•dond1986•34m ago•1 comments