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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!

GPT‑Live‑1 in the API

https://openai.com/index/introducing-gpt-live-1-in-the-api/
1•arittr•3m ago•0 comments

AVH Was Sued

https://avherald.com/h?article=53c8958a
1•_caw•6m ago•1 comments

Haiku Now Supports Changing Audio Outputs Live, Other Improvements

https://www.phoronix.com/news/Haiku-OS-August-2026
2•fork-bomber•9m ago•0 comments

Senator Hawley opens investigation into OpenAI HuggingFace hack

https://www.hawley.senate.gov/chairman-hawley-launches-investigation-into-openai-for-hacking-exis...
1•reasonableklout•10m ago•0 comments

Show HN: VeriCordon – CI evidence for agent/tool authorization decisions

https://github.com/dgenio/agentfence
1•dgenio•11m ago•0 comments

Californians owes $500B they never agreed to pay

https://sfstandard.com/opinion/2026/09/10/owe-500-billion-never-agreed-pay/
1•littlexsparkee•12m ago•0 comments

A kernel run on the Navier-Stokes blowup Lean project

https://github.com/ravanova/blowup-search/blob/main/writeup/7_confirmation/BLOG_CONFIRMATION.md
3•ravanova•18m ago•0 comments

We Replaced MMAP with Io_uring in Our Rust Query Engine. It Got Slower

https://www.conviva.ai/resource/we-replaced-mmap-with-io_uring-in-our-rust-query-engine-it-got-sl...
4•rzk•22m ago•0 comments

Racing to solve maths problems now 'pointless'

https://www.abc.net.au/news/2026-09-11/racing-to-solve-maths-problems-pointless-tristan-buckmaste...
4•elahieh•25m ago•0 comments

Astra marks the Claude 3.7 moment for knowledge work

https://fundaai.substack.com/p/deepllm-gpt-6-astra-opens-new-markets
4•deepmem•28m ago•0 comments

Show HN: Interactive history of Earth and human civilization

https://earth.ethanplus.ai/
2•freakynit•32m ago•0 comments

Apple Watch can grab snippets of conversation without both speakers' consent

https://www.theregister.com/security/2026/09/10/watch-out-apple-timepiece-can-grab-snippets-of-co...
2•signa11•34m ago•0 comments

Optimizing a Spin-Lock

https://david.alvarezrosa.com/posts/optimizing-a-spin-lock/
5•signa11•37m ago•0 comments

Ask HN: What Can We Do?

4•silexia•38m ago•1 comments

Fugu Max and Fugu Ultra v2: Orchestrating the Pareto Frontier

https://sakana.ai/fugu-max-release/
5•hardmaru•38m ago•0 comments

Show HN: Swiftime - time tracking you can talk to, with an API for AI agents

https://swiftime.ai/
1•tomazaria•44m ago•0 comments

The Branch and the Wish – On mathematics, machines and what the proof never held

https://nisheethvishnoi.substack.com/p/the-branch-and-the-wish
1•vismit2000•48m ago•0 comments

A jank percentage doesn't say where the frame went

https://github.com/timkrest/FrameHUD/blob/main/docs/article-frame-phases.md
1•timkrest•49m ago•0 comments

The Telescope NASA Launched Sunday Was Built to Look at You

https://galratner.substack.com/p/the-telescope-nasa-launched-sunday
2•blartpaul•52m ago•0 comments

The Gemini app is now available for Windows

https://blog.google/innovation-and-ai/products/gemini-app/gemini-app-now-on-windows/
7•quysala12•56m ago•2 comments

Thinking with Looped Flows

https://arxiv.org/abs/2609.11801
1•E-Reverance•58m ago•0 comments

Metamorphosis: Transformations in the Early Modern Flap Book (19th Century)

https://publicdomainreview.org/collection/metamorphosis-early-modern-flap-book/
1•benbreen•58m ago•0 comments

One company that steals accuses another company that steals [pdf]

https://www-cdn.anthropic.com/e50be2e51e7695dc4b1366a37a245a597377d3b5/Anthropic-Detecting-and-co...
2•iamsyr•59m ago•2 comments

Show HN: Hekla, an event sourcing runtime with its own language

https://hekla.tqwewe.com/
1•tqwewe•1h ago•0 comments

DeepSeek Harness

https://www.deepseek.com/harness/en/
3•dotmanish•1h ago•0 comments

It Breaks a Village: Bevy's 6th Birthday

https://blog.fallible.net/it-breaks-a-village/
2•RohanAdwankar•1h ago•1 comments

GPT Image 2.5 for Consulting Presentations: Faster Slides and Smarter Control

https://medium.com/@2315610426/gpt-image-2-5-f36976cf7632
2•chenxi030826•1h ago•0 comments

The Bayeux Tapestry: Woven by the Victors

https://www.historytoday.com/archive/out-margins/bayeux-tapestry-woven-victors
2•prismatic•1h ago•0 comments

How to Make a PwC-Style PowerPoint with AI (2): 5 More Consulting Frameworks

https://medium.com/@2315610426/how-to-make-a-pwc-style-powerpoint-with-ai-2-5-more-consulting-fra...
1•chenxi030826•1h ago•1 comments

Trial Testing Out-of-Body Experiences Produces Unexpected Twist

https://www.uvahealth.com/news/trial-testing-out-of-body-experiences-yields-unexpected-twist
1•geox•1h ago•0 comments