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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!

Everyone is so annoying about AI

https://cailinpitt.com/blog/2026/8/01/everyone-is-so-annoying-about-ai
1•classictraffic•53s ago•0 comments

Show HN: Atomadic – Zero-LLM Sub-200us MCP Action Interlock

https://atomadic.tech/
1•Atomadic•3m ago•0 comments

The Coldcard Disaster Gets Worse: The Hack May Have Reached $88.6M

https://medium.com/mountain-movers/the-coldcard-disaster-gets-worse-the-hack-may-have-reached-88-...
1•paulpauper•8m ago•0 comments

Show HN: I added a client-side SQL sanitizer so schema never touches our servers

https://www.querytuner.com/
1•autoshiftops•8m ago•0 comments

Create Embedded Software with Swift

https://www.swift.org/get-started/embedded/
1•frizlab•10m ago•0 comments

Galaxy Research Coldcard hack update: 1,158.81 BTC stolen from 2,673 addresses

https://twitter.com/glxyresearch/status/2083560979128820105
2•paulpauper•11m ago•0 comments

Let Sand Think

https://magzimof.com/let-the-sand-think/
1•shaimagz•11m ago•0 comments

Show HN: MCP Emails – An MCP Server for Gmail and IMAP/SMTP Inboxes

https://github.com/Albretsen/MCPEmails/tree/main/self-host
2•asgeiralbretsen•12m ago•0 comments

Peter Principle

https://en.wikipedia.org/wiki/Peter_principle
2•num42•12m ago•0 comments

Is it time to stop using glue and labels on paper?

https://www.bbc.co.uk/news/articles/c872nj1n4xyo
2•edward•13m ago•0 comments

AI learns language from skewed sources. It could change how humans speak/think

https://www.theguardian.com/commentisfree/2026/apr/14/ai-language-human-speech
1•fzeindl•13m ago•0 comments

Show HN: LLM Tools that I made that I cant live without

1•dleech•14m ago•0 comments

Don't grab any seat on a rocket ship

https://hunterwalk.com/2026/08/02/why-grab-any-seat-on-the-rocketship-is-a-bad-career-strategy-th...
1•andsoitis•15m ago•0 comments

The Debate of Mockist vs. Classicist TDD Is Like OOP vs. FP

https://fagnerbrack.com/the-debate-of-mockist-classicist-tdd-is-like-oop-fp-c9124185f3d2
1•theanonymousone•17m ago•0 comments

Why Gen Z is nostalgic for a world it never knew

https://bigthink.com/mind-behavior/why-gen-z-is-nostalgic-for-a-world-it-never-knew/
5•LordAtlas•21m ago•0 comments

Show HN: NixOS-DGX-Spark – Nix and NixOS on the DGX Spark

https://github.com/graham33/nixos-dgx-spark
7•graham33•22m ago•2 comments

Yahoo Finance rate-limits you harder if you spoof a browser User-Agent

https://github.com/AdityaSBisht/finance-mcp
2•adityabisht2700•24m ago•0 comments

Feedback wanted: Reflex – A low-cost retrieval API for recurring documents

https://aivax.net/blog/reflex-retrieval-built-for-recurring-documents/
1•cypherpotato•24m ago•0 comments

Poles of Inaccessibility in the San Gabriel Mountains

https://notes.secretsauce.net/notes/2015/05/06_poles-of-inaccessibility-in-the-san-gabriel-mounta...
1•dima55•25m ago•0 comments

How fast is C++26's std:hive?

https://lemire.me/blog/2026/08/02/how-fast-is-c26s-stdhive/
2•usdogu•25m ago•0 comments

Pushes to arch AUR are suspendended right now.

https://lists.archlinux.org/archives/list/aur-general@lists.archlinux.org/message/YPJ3FQYJTJXXY3R...
6•EbNar•25m ago•0 comments

Best Office Chairs of 2026– We Tested 70 to Pick Them

https://www.wired.com/gallery/best-office-chairs-button-1/
1•joozio•27m ago•0 comments

Prevent cognitive debt by manually retyping LLM-generated code

https://ankursethi.com/blog/prevent-cognitive-debt-by-manually-retyping-llm-generated-code/
2•philipportner•27m ago•0 comments

Epipe on write might mean you're doing it wrong

https://rachelbythebay.com/w/2026/07/09/pipe/
1•mpweiher•28m ago•0 comments

Understanding VC signals part I

https://www.admnt.com/blog/understanding-vc-signals-part-1
2•kekqqq•29m ago•0 comments

GNU Hurd News 2026-Q2

https://www.gnu.org/software/hurd/news/2026-q2.html
3•plaguna•30m ago•0 comments

The Secret Thrill of Paying to Open Someone Else's Unwanted Package

https://www.bloomberg.com/news/features/2026-07-31/why-amsterdam-s-mystery-parcel-shops-are-sprea...
3•p1anecrazy•30m ago•1 comments

NASA's Curiosity rover finds a field of honeycomb-textured ground on Mars

https://www.nasa.gov/missions/mars-science-laboratory/curiosity-rover/nasas-curiosity-mars-rover-...
4•MarcoDewey•33m ago•1 comments

Put a Tag on It

https://tedium.co/2026/08/01/pricing-guns-vs-barcodes-history/
2•Brajeshwar•33m ago•0 comments

Pepper-spraying drones deploying against school shooters, not everyone approves

https://theweek.com/crime/pepper-spraying-drones-school-shooters
2•mdp2021•35m ago•2 comments