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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!

Show HN: I build my wife an ad-free news brief that run deep fact-checks

https://beamwire.ai/
1•malammar•2m ago•1 comments

ProkitQ – Free tools for entrepreneurs with no signup required

https://prokitq.com/tools
1•isurumahesh•5m ago•1 comments

A searchable index of nonfiction book prizes

https://book-prize-index.vercel.app
1•saikatsg•6m ago•0 comments

How to Write a Quine

https://czterycztery.pl/slowo/quine-EN.html
1•mci•8m ago•0 comments

Startup founders urge Trump not to shut off Chinese open weight AI

https://www.politico.com/news/2026/07/22/startup-founders-urge-trump-not-to-shut-off-chinese-open...
2•tosh•13m ago•0 comments

Show HN: Trangram – a free browser-based vector editor (illustrator + timeline)

https://www.trangram.com
1•trangram•15m ago•0 comments

AI, hackers, and prediction markets threaten the indie web

https://stephenfollows.com/p/what-just-happened-to-thenumberscom-should-worry-us-all
1•alexnew•15m ago•0 comments

Fractal by Plasma AI

https://www.plasma.ai/research/fractal
1•handfuloflight•15m ago•0 comments

Hiring Senior Front End Developer

1•birthdayn•16m ago•1 comments

Pip 26.2: –only-deps solves 16 years of app deployment hacks

https://jamesoclaire.com/2026/07/23/pip-26-2-only-deps-solves-16-years-of-app-deployment-hacks/
1•ddxv•17m ago•0 comments

A gas-rich outback station could host a $28B off-grid AI data centre

https://thenextweb.com/news/australia-28bn-data-centre-project
1•langfo•18m ago•0 comments

How Agile Are You Really?

https://rethinkingsoftware.substack.com/p/how-agile-are-you-really
1•aard•20m ago•0 comments

Show HN: KalmDown – a phone lock with a passcode even you don't know

https://www.kalmdown.app/
1•dmsehuang•20m ago•0 comments

Travis Kalanick's Atoms raises $1.7B

https://atoms.co/unfinished-business
2•buildingrobots•26m ago•1 comments

Show HN: Free tool that reads a recruiter email and writes your reply

https://www.offerflowai.com/tools/recruiter-reply
1•csongorczezar•30m ago•0 comments

Using sed to make indexes for books (long)

https://www.pement.org/sed/make_indexes.txt
1•TMWNN•31m ago•0 comments

Show HN: RSVP Reader specially for PDF books

https://catb1t.github.io/seshat/
1•cab1t•35m ago•0 comments

What we know about the typical Polymarket user

https://www.pewresearch.org/short-reads/2026/07/22/what-we-know-about-the-typical-polymarket-user/
3•thm•38m ago•0 comments

Buyout groups hunt for software bargains after 'SaaS-pocalypse'

https://www.ft.com/content/d331c1f5-27c0-4d5a-a4ab-7a52e1119cc5
1•thm•38m ago•0 comments

Gen Z-Ers Are Ditching Sex. They Might Be onto Something

https://www.nytimes.com/2026/07/22/opinion/gen-z-sex-celibacy-relationships.html
2•whyage•39m ago•0 comments

Testty: E2E Testing for TUI Apps

https://github.com/agentty-xyz/agentty/tree/main/crates/testty
5•minev-dev•40m ago•0 comments

Dinitz-Garg-Goemans conjecture proven false by GPT 5.6

https://twitter.com/DmitryRybin1/status/2079904005652893709
2•virgildotcodes•41m ago•0 comments

I bought my first BTC back in 2018, and still worried about losing it until now

1•blackbeam•43m ago•0 comments

Publicly verifiable receipts for AI agent actions, anchored to Bitcoin

https://orphograph.com/lp/agent-receipts
2•Oliver-Pitirre•46m ago•0 comments

Show HN: Searchdesk, AI powered job search that tailors resume and cover letter

https://searchdesk.app
1•smltr•50m ago•0 comments

Amazon cuts jobs in its AI unit

https://www.cnbc.com/2026/07/22/amazon-lays-off-some-employees-in-its-agi-unit.html
3•kadhirvelm•52m ago•0 comments

Renewal Theory

https://en.wikipedia.org/wiki/Renewal_theory
1•efavdb•54m ago•0 comments

GPT 5.6 Pro finds counterexample to Dinitz-Garg-Goemans conjecture

https://xcancel.com/DmitryRybin1/status/2079904005652893709
1•agnosticmantis•55m ago•0 comments

Mirror-Mirror: Mirror your PC screen to your phone over your local network

https://github.com/maco30001/Mirror-Mirror
3•maco3000•58m ago•0 comments

A 100-Task Benchmark of 7 Leading LLMs with Apache SeaTunnel AI CLI

https://apacheseatunnel.medium.com/can-ai-really-build-data-pipelines-8f8713947ad8
1•SeaTunnel•1h ago•0 comments