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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•8mo 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!

Trump Action Tracker

https://www.trumpactiontracker.info/?start=2025-01-20&end=2026-01-26
1•gizzlon•30s ago•0 comments

Visualizing Rectified Flows

https://alechelbling.com/blog/rectified-flow/
1•vinhnx•4m ago•0 comments

Why all AI coding startups get pricing wrong

https://getlago.substack.com/p/why-every-ai-coding-tool-gets-pricing
1•FinnLobsien•5m ago•0 comments

Porting Doom to My WebAssembly VM

https://irreducible.io/blog/porting-doom-to-wasm/
2•irreducible•5m ago•0 comments

Why Startups Still Choosing Rails Are Betting Against the Future

https://medium.com/@yashbatra11111/ruby-on-rails-is-dead-why-startups-still-choosing-it-are-betti...
1•trusche•6m ago•0 comments

What do we mean when we talk about pollution and toxicity in online spaces?

https://thoughtshrapnel.com/2026/01/24/what-do-we-mean-when.html
1•speckx•6m ago•0 comments

Exactitude in Science – Borges (1946) [pdf]

https://kwarc.info/teaching/TDM/Borges.pdf
2•jxmorris12•8m ago•0 comments

There's no dark mode on your dollar

https://bryonyoni.substack.com/p/there-is-no-dark-mode-on-your-dollar
1•bryonyoni•9m ago•0 comments

Television is 100 years old today

https://diamondgeezer.blogspot.com/2026/01/tv100.html
2•qassiov•12m ago•0 comments

China figured out how to sell EVs. Now it has to deal with their aging batteries

https://www.technologyreview.com/2025/12/18/1130148/china-ev-battery-recycle/
1•srameshc•13m ago•0 comments

Built a way to get simulated feedback before launch

https://www.nichesim.com/
1•justincxa•14m ago•1 comments

Show HN: Partial content web crawling using HTTP/2 and Go

https://altayakkus.substack.com/p/partial-content-web-crawling-using
2•biosboiii•15m ago•0 comments

Voters See a Middle-Class Lifestyle as Drifting Out of Reach, Poll Finds

https://www.nytimes.com/2026/01/26/us/politics/affordability-poll.html
2•mooreds•15m ago•0 comments

Show HN: Visualizing the Transformer architecture by tracing a single prompt

https://www.youtube.com/watch?v=x-XkExN6BkI
1•practicalaifg•16m ago•0 comments

Show HN: L3Elite – Market surveillance engine in Rust with embedded ML

https://github.com/exequiel-tiscornia/L3Binance
1•blacktis•16m ago•0 comments

Why America needs fewer bus stops

https://www.worksinprogress.news/p/america-has-too-many-bus-stops
1•PaulHoule•16m ago•0 comments

Kubernetes Remote Code Execution via Nodes/Proxy Get Permission

https://grahamhelton.com/blog/nodes-proxy-rce
2•illithid0•17m ago•0 comments

Performance Tips for Fast Iceberg Queries

https://www.dremio.com/blog/5-counter-intuitive-dremio-performance-tips-for-lightning-fast-iceber...
1•mooreds•18m ago•0 comments

Dev visibility for non-technical founders and stakeholders

1•inferno22•18m ago•0 comments

Absolute AppSec – Justin Collins – Managing Security, ProdSec vs. AppSec [video]

https://www.youtube.com/watch?v=QkxOztMfkoE
1•mooreds•19m ago•0 comments

Show HN: 1Setter – One-click access to macOS system settings from the menu bar

https://www.1setter.app
1•yyqyes•20m ago•0 comments

Draft PR for DX12 Performance Problem with Nvidia/Intel

https://github.com/HansKristian-Work/vkd3d-proton/pull/2805
1•tuananh•22m ago•0 comments

The Rise of the Model Designer

https://www.aidesignfieldguide.com/articles/barron-webster
1•herbertl•25m ago•0 comments

OTelBench: Can AI instrument OpenTelemetry?

https://quesma.com/benchmarks/otel/
4•jakozaur•26m ago•1 comments

Google AI Overviews cite YouTube more than any medical site for health queries

https://www.theguardian.com/technology/2026/jan/24/google-ai-overviews-youtube-medical-citations-...
9•bookofjoe•26m ago•0 comments

Satoshi Kon Sketched Films into Existence

https://animationobsessive.substack.com/p/how-satoshi-kon-sketched-films-into
1•keiferski•27m ago•0 comments

Show HN: Borneo – A full-stack open-source aquarium LED controller

https://github.com/borneo-iot/borneo
1•oldrev•28m ago•0 comments

Major roll out of LaSuite Meet in the French administration

https://github.com/suitenumerique/meet
11•maelito•28m ago•3 comments

CodSpeed CLI: Deterministic benchmarking for any executable

https://github.com/CodSpeedHQ/codspeed
5•art049•28m ago•0 comments

Joint Review: Philosophy Between the Lines, by Arthur M. Melzer

https://www.thepsmiths.com/p/joint-review-philosophy-between-the
1•jger15•30m ago•0 comments