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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!

Yahoo admits mangling email (2002)

http://news.bbc.co.uk/2/hi/science/nature/2138014.stm
2•downbad_•2m ago•1 comments

The Origin of a Consumer Brand

https://twitter.com/NirZicherman/status/2081815148512100623
1•shoes_foots•2m ago•0 comments

The First Thing That Ever Sold Online Was Pizza (2018)

https://thehistoryoftheweb.com/postscript/pizzanet/
1•downbad_•3m ago•0 comments

Visual Regression Testing: The Most Important Test

https://howtotestfrontend.com/resources/visual-regression-testing-introduction-guide
1•howToTestFE•4m ago•0 comments

Is FiberFS an AI Project?

https://fiberfs.io/blog/is_fiberfs_an_ai_project
2•nyc_pizzadev•6m ago•0 comments

Recall Proposed for 737 MAX Seat Defect

https://www.federalregister.gov/documents/2026/07/27/2026-15072/airworthiness-directives-the-boei...
1•r2sk5t•7m ago•0 comments

The Hideous Duty of Isaiah Berlin [pdf]

https://berlin.wolf.ox.ac.uk/lists/onib/kemper.pdf
1•jruohonen•7m ago•0 comments

Does Speaking to Agents Like Cavemen Save 65% of Tokens? We Test

https://blog.jetbrains.com/ai/2026/07/speak-to-ai-agents-like-cavemen-tosave-tokens/
1•SerCe•8m ago•0 comments

Best Fonts for Programming in 2026

https://draculatheme.com/blog/best-fonts-for-programming-2026
1•luxonauta•8m ago•0 comments

Synesthesia

https://en.wikipedia.org/wiki/Synesthesia
1•FergusArgyll•8m ago•0 comments

Show HN: Openvisor – A Session Explorer for OpenCode

https://openvisor.vercel.app/
1•shadeslayer_•10m ago•0 comments

Backfills should fail in minutes, not days

https://will-keleher.com/posts/backfills-should-fail-in-minutes-not-days/
1•speckx•11m ago•0 comments

Don't Use Ordinary Software to Contain Software-Hacking Agents

https://verse.systems/blog/post/2026-07-24-dont-use-software-to-contain-software-hacking-agents/
1•matt_d•11m ago•0 comments

X Money released to Premium and Premium+ users in the US

https://money.x.com/en
2•wtsnz•11m ago•1 comments

Show HN: A 538-style dashboard for upcoming Knesset elections

https://theelectiondashboard.com/
2•AzariaK•14m ago•0 comments

Do you hide your AI behind a curtain?

https://similaritiesengine.com/
1•BubbleRings•15m ago•2 comments

Managing Critical Isotopes: DOE Could Better Assess Market Needs

https://www.gao.gov/products/gao-26-108053
1•Jimmc414•15m ago•0 comments

Administration Demands Hospitals Share Emergency Room Records

https://kffhealthnews.org/health-industry/cpsc-consumer-product-safety-commission-trump-er-injury...
1•Jimmc414•16m ago•0 comments

A Dinner on What It Means to Write Science

https://chillphysicsenjoyer.substack.com/p/a-dinner-on-what-it-means-to-write
1•crescit_eundo•17m ago•0 comments

Birding Like It's 1899: Inside a Blockbuster American West Video Game (2019)

https://www.audubon.org/news/birding-its-1899-inside-blockbuster-american-west-video-game
1•eatonphil•17m ago•0 comments

OCR accuracy: 100% & Fraud: 100 % – AI vs. template based fraud

https://idp-software.com/news/the-100-dollar-forgery/
2•chelm•18m ago•0 comments

Conversation and Context in an Online World

https://blog.apaonline.org/2026/07/27/conversation-and-context-in-an-online-world/
1•jruohonen•19m ago•0 comments

Sharden Mine (no competition) Alchemy free-tier ~65k rounds Snapdragon870 termux

https://github.com/babakkarimib/sharden-miner
1•Sharden•21m ago•0 comments

Things I would like to tell my 10 year old self

https://winnielim.org/journal/things-i-would-like-to-tell-my-10-year-old-self/
2•speckx•23m ago•0 comments

Parents 'driven to suicide' by wrong orders to pay child maintenance

https://www.thetimes.com/money/family-finances/article/parents-suicide-wrong-orders-child-mainten...
2•bbg2401•25m ago•1 comments

Why China is giving away its best AI models

https://www.theverge.com/ai-artificial-intelligence/971444/how-chinese-open-weight-ai-models-impa...
1•saikatsg•26m ago•0 comments

Why budding birders are flocking to Shazam-like apps to identify avians

https://www.bbc.com/news/articles/cr59m5nmemno
1•saikatsg•28m ago•1 comments

Sheepview360 (2016)

https://visitfaroeislands.com/en/about-vfi/marketing-development-campaigns/sheepview360
1•KomoD•29m ago•0 comments

If You're over 40, You're Ready to Use A.I

https://www.nytimes.com/2026/07/27/opinion/teaching-kabbalah-ai.html
4•apparent•30m ago•1 comments

The Rosenberg Boys

https://www.theatlantic.com/magazine/2026/08/ethel-julius-rosenberg-boys/687631/
1•gmays•31m ago•0 comments