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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•6mo 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!

The Greenlandic Santa Claus: The Fairytale That Disappeared (2022)

https://www.sermitsiaq.ag/kultur/den-gronlandske-julemand-eventyret-der-forsvandt/313490
1•tokai•3m ago•0 comments

Energy-Generating Floor Tiles: How Pavegen Turns Steps into Power

https://insights.greyb.com/pavegen-energy-generating-floor-tiles-patents/
1•Rahul035•6m ago•1 comments

AI as a WordPress Fundamental

https://make.wordpress.org/core/2025/12/04/ai-as-a-wordpress-fundamental/
1•gslin•10m ago•0 comments

Fast trigram based code search

https://github.com/sourcegraph/zoekt
2•cv_h•16m ago•0 comments

Sugars, 'Gum,' Stardust Found in NASA's Asteroid Bennu Samples

https://www.nasa.gov/missions/osiris-rex/sugars-gum-stardust-found-in-nasas-asteroid-bennu-samples/
1•ryan_j_naughton•18m ago•0 comments

Anthropic's Claude Interviewer

https://claude.ai/interviewer
2•Brajeshwar•18m ago•0 comments

Weird FFmpeg Use Cases

https://www.twitch.tv/videos/2635259036
1•implabinash•23m ago•1 comments

Nvidia CUDA Tile

https://developer.nvidia.com/cuda/tile
3•elkguy•25m ago•0 comments

PRC State-Sponsored Actors Use Malware Across Public Sector and IT Systems

https://www.cisa.gov/news-events/alerts/2025/12/04/prc-state-sponsored-actors-use-brickstorm-malw...
3•gslin•26m ago•0 comments

Vpternlog: Signed Saturation

https://wunkolo.github.io/post/2025/12/vpternlog-signed-saturation/
1•mfiguiere•26m ago•0 comments

Nanopositioning Metrology, Gödel, and Bootstraps

https://www.pi-usa.us/en/tech-blog/nanopositioning-metrology-goedel-and-bootstraps
1•nill0•26m ago•0 comments

Show HN: A fun sustainability marketplace for teams

https://createamarketplace.com/social-marketplace
1•cladian•27m ago•0 comments

Nano Banana Pro – AI Image Editor with Perfect Text Rendering and 4K

https://nanobanana.org
2•MikeMoh•31m ago•0 comments

Warner Bros Begins Exclusive Deal Talks With Netflix

https://www.bloomberg.com/news/articles/2025-12-05/warner-bros-is-said-to-begin-exclusive-deal-ta...
1•mfiguiere•33m ago•2 comments

High Friction Learning Habits: Why Your "Second Brain" Is Failing

https://medium.com/@awabs/jit-learning-why-just-in-case-information-gets-deleted-by-your-brain-15...
1•Awab•35m ago•0 comments

NeuralRemaster: Phase-Preserving Diffusion for Structure-Aligned Generation

https://www.youtube.com/watch?v=pqmdsO1L45w
1•E-Reverance•43m ago•0 comments

Review: Surreal Numbers

https://signoregalilei.com/2025/11/26/review-surreal-numbers/
1•surprisetalk•46m ago•0 comments

A Man I Want to Meet the Most

https://chillphysicsenjoyer.substack.com/p/the-man-i-want-to-meet-the-most
3•surprisetalk•46m ago•0 comments

Rabbit Hole Learning

https://seated.ro/posts/rabbit-hole-learning.html
3•surprisetalk•46m ago•0 comments

The "Pretend to Work" Loophole of China [video]

https://www.youtube.com/watch?v=W7VJLipgiuQ
1•surprisetalk•46m ago•0 comments

Trump: Japan's 'Cute' Kei Cars Are Coming to America

https://www.motor1.com/news/780870/trump-kei-cars-coming-america/
4•harambae•51m ago•0 comments

Rethink Talks New Transcoding Report and Future of VVC, AV1, and Lcevc

https://www.streamingmedia.com/Articles/ReadArticle.aspx?ArticleID=172602
2•breve•53m ago•0 comments

Samsung unveils first multi-folding phone as competition set to heat up

https://www.reuters.com/business/media-telecom/samsung-unveils-first-multi-folding-phone-competit...
1•mgh2•53m ago•0 comments

Show HN: Vibe Commander

https://github.com/AvitalTamir/vibecommander
2•fatliverfreddy•1h ago•0 comments

Bcachefs 1.33.0 – Reconcile

https://lore.kernel.org/linux-bcachefs/slvis5ybvo7ch3vxh5yb6turapyq7hai2tddwjriicfxqivnpn@xdpb25w...
2•RGBCube•1h ago•0 comments

Updating My Bash Prompt

https://martianlantern.github.io/2025/11/updating-my-bash-prompt/
2•martianlantern•1h ago•1 comments

Robotgo v1.0.0 and Pro, easy build automation, auto test, computer use

https://github.com/go-vgo/robotgo/releases/tag/v1.0.0
2•veni0•1h ago•0 comments

South Korea developing app that shows real-time location of stalkers

https://www.bbc.com/news/articles/cp84y7jx2pzo
4•1659447091•1h ago•0 comments

The Long, Knotty, World-Spanning Story of String

https://hakaimagazine.com/features/the-long-knotty-world-spanning-story-of-string/
2•bookofjoe•1h ago•0 comments

Blogging in 2025: Screaming into the Void

https://askmike.org/articles/blogging-in-2025-screaming-into-the-void/
2•askmike•1h ago•0 comments