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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!

Dartmouth Workshop

https://en.wikipedia.org/wiki/Dartmouth_workshop
1•Betelbuddy•1m ago•0 comments

Show HN: SleepSignal – App to calm down your nighttime racing thoughts

https://sleepsignal.app/
1•greybox555•1m ago•0 comments

ZMap: Fast network scanner optimized for Internet-wide network surveys

https://zmap.io/
1•epestr•1m ago•0 comments

Martian dust presents additional risks for future crewed missions to Mars

https://www.pnas.org/doi/10.1073/pnas.2620747123
1•gnabgib•5m ago•0 comments

What does Nix see when it reads a shell.nix?

https://www.labcraft.dev/blog/nix-expressions
1•anandsuresh•7m ago•0 comments

Hippos and Whales: Unlikely Cousins

https://www.rom.on.ca/blogs/hippos-and-whales-unlikely-cousins
2•colinprince•9m ago•0 comments

Tubetui – YouTube in the Terminal (Rust)

https://github.com/polblancoo/tubetui
1•polblancoo•11m ago•0 comments

Computer Science Fiction (2010)

https://blog.regehr.org/archives/31
1•andsoitis•14m ago•0 comments

200 Compiler Bugs (2010)

https://blog.regehr.org/archives/39
1•andsoitis•15m ago•0 comments

A New Map of 'Empty' Space Challenges a Tranquil Picture of the Galaxy

https://www.quantamagazine.org/a-new-map-of-empty-space-challenges-a-tranquil-picture-of-the-gala...
1•pseudolus•19m ago•0 comments

Dispatch: A local GUI for manually running GitHub Actions workflows

https://github.com/skorotkiewicz/dispatch-workflows
1•modinfo•20m ago•0 comments

Provare – A Typechecker for Your Thoughts

https://provare-typechecker.vercel.app
2•wrtn•21m ago•1 comments

Self-Serve Drill Bits Are a CIAM Use Case

https://ciamweekly.substack.com/p/self-serve-drill-bits-are-a-ciam
1•mooreds•23m ago•0 comments

UbuWeb has been 'tocked (TikTok clone for avant garde art)

https://nonsens.ing/ubutok/
2•a_number_of_his•25m ago•1 comments

Mars dust may be less abrasive than lunar dust, spacesuit samples suggest

https://phys.org/news/2026-10-mars-abrasive-lunar-spacesuit-samples.html
2•bookmtn•25m ago•0 comments

The Megadonors Who Have Poured $1.2B into the Midterms

https://www.nytimes.com/interactive/2026/08/28/us/politics/billionaire-midterms-donors.html
1•doener•27m ago•0 comments

Should He Fix Churn, Change Pricing, or Rebuild His SaaS? [video]

https://www.youtube.com/watch?v=uTVyLYDOd1M
1•mooreds•27m ago•0 comments

Cozy random passages from Arnold Lobel's Frog and Toad books

https://bsky.app/profile/frogandtoadbot.bsky.social
1•mooreds•29m ago•0 comments

Google joins OpenAI and Anthropic in promising new scraping controls

https://www.engadget.com/2303225/google-openai-anthropic-ai-crawling-controls/
2•geox•34m ago•0 comments

The Exponential Time Hypothesis: How the (dis-)proof works [video]

https://www.youtube.com/watch?v=fEaTKrk492E
1•HotHotLava•41m ago•1 comments

NASA is asking for ideas to rescue Hubble

https://arstechnica.com/space/2026/10/think-you-can-save-the-hubble-space-telescope-nasa-wants-to...
2•Gaishan•42m ago•0 comments

In LLM era, can software startup survive?

3•sjia•45m ago•5 comments

Nashi: Open-source file converter and editor app with a drag-wheel interaction

https://github.com/orkunisitmak/nashi-app
1•thunderbong•46m ago•0 comments

Bell Labs Contribution to the Architecture of Computation Theory

https://en.wikipedia.org/wiki/Point-contact_transistor
2•efren6•46m ago•0 comments

U.S. workers took home their smallest share of capital since at least 1947

https://fortune.com/article/why-did-us-workers-just-take-home-smallest-share-of-capital-since-194...
132•qlte•53m ago•29 comments

Its Investors Say Kalshi Is Worth $40B. Is an IPO Next?

https://www.nytimes.com/2026/10/29/business/dealbook/kalshi-fundraising-ipo.html
1•bookofjoe•53m ago•1 comments

America's Sewer Systems Are Surprisingly Vulnerable to Cyber Attacks

https://policygradients.thefai.org/p/americas-sewer-systems-are-surprisingly
3•donchuru•54m ago•0 comments

France plans internet tax of 5.5 cents per gigabyte

https://www.heise.de/en/news/France-plans-internet-tax-of-5-5-cents-per-gigabyte-11507179.html
3•slymax•56m ago•0 comments

Ask HN: What do you predict you'll be doing for work in 5 years?

3•thedreammachine•57m ago•2 comments

Show HN: TunaML – Renewable Energy Analytics

https://tunaml.com/
1•sheunl•59m ago•0 comments