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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!

Mana Hempcrete Walls

https://tasteofselfsufficiency.co.uk/2026/08/17/mana-hempcrete-walls/
1•speckx•2m ago•0 comments

Expired credit cards revived by researchers to make unauthorized payments

https://www.theregister.com/security/2026/08/18/expired-credit-cards-revived-by-researchers-to-ma...
2•joebuckwilliams•2m ago•0 comments

Show HN: Virtual Panoramas of the Cambrian

https://flyingspringrol.github.io/BloomEducation/palezoic/
1•aronowb14•3m ago•0 comments

The Intrinsic Valuation of Biodiversity Loss [pdf]

https://static1.squarespace.com/static/5b4b997eda02bc592b5131cd/t/6a6d97b71fab6c1175baf018/178556...
1•marojejian•4m ago•1 comments

Stripe Agrees to Acquire OpenRouter

https://stripe.com/newsroom/news/stripe-agrees-to-acquire-openrouter
2•mmcclure•4m ago•0 comments

The Open Source Maintenance Fee for Polly

https://thepollyproject.org/2026/07/14/polly-osmf-announcement.html
1•ngetchell•4m ago•0 comments

Show HN: Headless Terminal: skill for agents to use interactive TUI/CLI programs

https://www.skills.sh/montanaflynn/headless-terminal/headless-terminal
1•anonfunction•6m ago•0 comments

MX Records: The Untold Story of Email

https://blog.lacnic.net/en/story-of-email/
2•alvis•7m ago•0 comments

Analysis of 3,602 ChatGPT ads: advertisers appeared in answers 8% of the time

https://nile.app/blog/chatgpt-ads-paid-vs-recommended/
1•zhaoAI•9m ago•0 comments

The Archive in Between: Dreamer's Dale [video]

https://www.youtube.com/shorts/6ZeHnAbFdcs
2•akkartik•10m ago•0 comments

Maths Puzzle Endurance World Record [video]

https://www.youtube.com/watch?v=1L3JTmWRvsk
2•marvinborner•10m ago•0 comments

Show HN: Flocker.md – Portable identity and shared state for agents

https://flocker.md/
2•hcjmartin•11m ago•0 comments

Stealing Reasoning Traces from Proprietary LLM APIs

https://arxiv.org/abs/2608.09867
2•amai•11m ago•1 comments

Best Buy 'Repaired' a 64GB Laptop by Making It 32GB

https://www.extremetech.com/computing/best-buy-repaired-a-64gb-laptop-by-making-it-32gb
2•speckx•12m ago•0 comments

S1-mini, Superwhisper's first open-weights language model

https://huggingface.co/superwhisper/s1-mini
3•Softmaximalist•13m ago•0 comments

What Is Reasoning

https://lucumr.pocoo.org/2026/8/19/what-is-reasoning/
2•tosh•13m ago•0 comments

"Why should you ever log into Salesforce again?"

https://www.fuse.is/blog/never-log-into-salesforce-again
2•rkovashikawa•14m ago•0 comments

Go 1.27 Released

https://go.dev/doc/devel/release
2•fero14041•15m ago•1 comments

A Lawyer for AI Agents

https://artificialauthority.ai/p/a-lawyer-for-ai-agents
1•speckx•16m ago•0 comments

Psychopathic Sims: Testing the Cheater-Hawk Hypothesis in a Video Game

https://link.springer.com/article/10.1007/s40806-020-00231-3
1•jambalaya8•17m ago•0 comments

Show HN: terminal-code – VS Code inside the terminal

https://terminal-code.com
1•robpruzan•17m ago•0 comments

We built a 3D underground explorer on 13M standardized well logs

https://drillerdb.com/underground/driftless
2•craig_vg•17m ago•1 comments

The Truth Is in the Detail

https://www.poetryfoundation.org/articles/1820031/the-truth-is-in-the-detail
1•paulpauper•18m ago•0 comments

The detectives preparing to solve murders in space

https://www.sciencefocus.com/space/heres-how-astronauts-will-soon-solve-murders-in-space-2
2•paulpauper•18m ago•0 comments

Health and productivity tips from top performers

https://www.aescle.com/blog/17-health-and-productivity-tips/
1•richhwang•19m ago•0 comments

Reverse-Lookup Service Exposed Photos of People's Faces

https://www.wired.com/story/reverse-lookup-service-exposed-millions-of-photos-of-peoples-faces/
2•rndsignals•20m ago•0 comments

OpenAI previews zero-retention safety system as Anthropic requires data logs

https://www.axios.com/2026/08/19/openai-previews-zero-retention-safety-system-as-anthropic-requir...
2•tmp10423288442•22m ago•0 comments

Show HN: Frugal Tokens – explore costs and usage across coding agents

https://demo.frugaltokens.com/
8•dpc94•23m ago•1 comments

Exploting a printer to run a Minecraft server

https://www.youtube.com/watch?v=1LXoEscyOO4
2•vimpo•24m ago•0 comments

Show HN: Pingularity – scheduled Ookla/iperf3 speedtest dashboard, outage alerts

https://pingularity.dev/
2•cansofgrease•25m ago•0 comments