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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!

Planning permission for Mayo data centre overturned after appeal

https://www.westernpeople.ie/news/planning-permission-for-mayo-data-centre-overturned-after-appea...
1•robin_reala•59s ago•0 comments

I built a free AI tarot reader for Android

https://play.google.com/store/apps/details?id=com.earthbound_tarot&hl=en_US
1•normaneisenhowe•1m ago•0 comments

Grok 4.7 Launching Soon

https://twitter.com/birdabo/status/2100578715499704551
1•soltanov•2m ago•0 comments

The Wandervogel

https://medium.com/luminasticity/the-wandervogel-e74169996806
1•bryanrasmussen•4m ago•0 comments

Researchers find way to listen in on headphones from afar

https://www.theregister.com/security/2026/09/17/researchers-find-way-to-listen-in-on-headphones-f...
1•geox•6m ago•0 comments

I'm an American raising 2 kids in Italy. Parenting here is completely different

https://www.businessinsider.com/american-raising-kids-in-italy-differences-parenting-abroad-2026-9
2•theanonymousone•12m ago•0 comments

Man is not for production, production is for man

https://www.instagram.com/reel/DdTxLLRh6b0/
1•elzbardico•15m ago•0 comments

'Doom Loop': OpenAI and Microsoft Admits LLMs Are Destroying the Web

https://www.404media.co/doom-loop-openai-and-microsoft-admits-llms-are-destroying-the-web-and-bui...
1•q-base•16m ago•0 comments

Everiot – A Reddit/4Chan hybrid. 0 age verification, 0 ads, ~0 users

https://everiot.org/
1•gaurana•16m ago•0 comments

Grounds to believe US committed war crimes in Iran strikes

https://www.bbc.com/news/articles/cm9w4n5nverdo
1•cicko•28m ago•0 comments

Build a Stripe Dunning Sequence That Recovers Revenue, Not Just Reminders

https://www.roninmindai.com/blog/stripe-dunning-sequence
1•roninmindtv•31m ago•0 comments

Involuntary Churn Playbook: Recover Expired Cards Before They Cancel

https://www.roninmindai.com/blog/involuntary-churn-playbook
1•roninmindtv•32m ago•0 comments

Australia and New Zealand could follow Canada into associated EU membership

https://www.euronews.com/my-europe/2026/09/17/australia-and-new-zealand-could-follow-canada-into-...
2•vrganj•33m ago•1 comments

Inside ZCode: Silently Uploading Your Git History to the Cloud

https://blog.ferstar.org/en/posts/zcode-silent-workspace-snapshot-upload/
5•csmantle•33m ago•0 comments

A Trip to the ER

https://walkingtheworld.substack.com/p/a-trip-to-the-er-and-a-public-service
1•tosh•36m ago•0 comments

Epistemology

https://trends.google.com/trends/explore?date=all&geo=US&q=epistemology&hl=en-US
1•someothherguyy•40m ago•0 comments

Show HN: Open-Source Alternative to TypeSafe.ai

https://github.com/TitovDigital/kbai-skill
1•ptitov•40m ago•1 comments

Risks and Benefits of Conducting Research on Pathogens of Pandemic Potential

https://pandorareport.org/2024/11/22/assessing-the-risks-and-benefits-of-conducting-research-on-p...
1•gone35•41m ago•1 comments

UN turns to Google to make its global data ready for AI agents

https://techcrunch.com/2026/09/17/un-turns-to-google-to-make-its-global-data-ready-for-ai-agents/
2•rdmuser•45m ago•0 comments

OpenPrinter on the Road to Launch

https://www.crowdsupply.com/open-tools/openprinter/updates/on-the-road-to-launch
1•phony-account•53m ago•0 comments

Why Navier-Stokes Pushes Math and Physics to the Edge – Quanta Magazine

https://www.youtube.com/watch?v=PsWR1rQEWYo
1•vismit2000•53m ago•0 comments

Open alternative to TypeSafe's Jev, running locally on your own GPU

https://github.com/ikermoel/open-alternative-jev
1•ikerM•53m ago•0 comments

No More Free Lunch for Consistency Across Microservices

https://medium.com/scalar-engineering/no-more-free-lunch-for-consistency-across-microservices-746...
1•feeblefakie•56m ago•0 comments

From Lizard Venom to Ozempic: How VA Research Changed Medicine

https://www.military.com/benefits/veterans-health-care/lizard-venom-ozempic-how-va-research-chang...
2•thunderbong•58m ago•0 comments

What a stranger can verify about an AI business

https://sound.fan/editorial/what-a-stranger-can-verify-about-an-ai-business
2•michi883•1h ago•1 comments

Possible hint of dark matter detected

https://www.ucl.ac.uk/news/2026/sep/possible-hint-dark-matter-recorded
2•seanhunter•1h ago•1 comments

How can AI help PDF?

https://pdf4wcag.com/blog-news/how-can-ai-help-pdf
3•matbug•1h ago•3 comments

Type Safe Interpreters

https://blueberrywren.dev/blog/type-safe-interpreters/
1•dimonomid•1h ago•0 comments

Show HN: LinkBunny, a service where coding agents exchange backlinks autonomousy

https://getlinkbunny.com/
1•hboon•1h ago•1 comments

Relationship Between Mathematics and Physics

https://en.wikipedia.org/wiki/Relationship_between_mathematics_and_physics
1•vismit2000•1h ago•0 comments