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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!

Writing VBA modules inside Excel files is much stranger than I expected

https://github.com/WilliamSmithEdward/pyOpenVBA/blob/main/docs/ms-ovba-implementation-guide_v2.md
1•birdculture•34s ago•0 comments

How ancient builders made the Great Pyramid of Giza nearly earthquake-proof

https://www.nationalgeographic.com/history/article/giza-pyramid-earthquake
1•bookofjoe•2m ago•1 comments

US Government releases UFO sighting reports – 'Orbs swarming in all directions'

https://www.bbc.com/news/articles/cn8pzzlyy66o
1•nsoonhui•4m ago•0 comments

There's Never Been a Better Time to Study Computer Science

https://www.theatlantic.com/technology/2026/05/computer-science-major-coding-ai/687279/
1•chrisaycock•6m ago•0 comments

Building a claw-like agent to run in the browser

https://aifoc.us/building-a-claw-in-the-browser/
1•kinlan•7m ago•0 comments

China: Mine death toll rises to 90 after gas blast

https://www.theguardian.com/world/2026/may/23/china-mine-explosion-shanxi-deaths-xi-jinping
2•tosh•14m ago•0 comments

Trump admin to force foreigners in the U.S. to apply for a green card abroad

https://www.npr.org/2026/05/23/nx-s1-5832399/trump-administration-green-card-abroad
1•thinkcontext•16m ago•4 comments

Matrix Multiplications on GPUs Run Faster When Given "Predictable" Data

https://www.thonking.ai/p/strangely-matrix-multiplications
1•tosh•16m ago•0 comments

80386 Microcode Disassembled

https://www.reenigne.org/blog/80386-microcode-disassembled/
13•nand2mario•16m ago•0 comments

macOS-MCP

https://github.com/CursorTouch/MacOS-MCP
2•jeomon•17m ago•1 comments

Judson's Last Ride

https://www.realclearpolitics.com/articles/2026/05/22/judsons_last_ride_154150.html
1•NaOH•19m ago•0 comments

Building Self-Extending CLI Tools with Strands Agent

https://aws.amazon.com/blogs/devops/building-self-extending-cli-tools-with-aws-strands/
1•kiyanwang•25m ago•0 comments

Europe physicists plan to build 91-kilometer particle collider

https://www.science.org/content/article/it-s-official-europe-physicists-plan-build-91-kilometer-p...
2•layer8•25m ago•0 comments

Sundar Pichai Understands Why People Are Anxious About A.I

https://www.nytimes.com/2026/05/22/podcasts/sundar-pichai-understands-why-people-are-anxious-abou...
1•thm•27m ago•1 comments

Nvidia: Nemotron Labs Diffusion 14B

https://huggingface.co/nvidia/Nemotron-Labs-Diffusion-14B
2•GaggiX•28m ago•0 comments

Horizontal vs. vertical context switching for engineering managers

https://blog.incrementalforgetting.tech/p/not-all-interruptions-are-created
1•kiyanwang•29m ago•0 comments

How Helping your rivals makes you harder to beat

https://bigthink.com/the-long-game/how-helping-your-rivals-makes-you-harder-to-beat/
1•RickJWagner•30m ago•0 comments

The Vault – Local memory layer and dashboard for MCP coding agents

https://github.com/aliihsaad/the-vault
1•aliihsaad•32m ago•0 comments

Electrobun 2.0 will be decoupled from Bun due to the rust rewrite

https://twitter.com/i/status/2058064720553222567
3•bundie•33m ago•0 comments

Engineering Metrics for Beginners

https://blog.jgefroh.com/p/engineering-metrics-for-beginners
1•kiyanwang•35m ago•0 comments

Trump Admin Investigating US Taxpayer-Funded Biolabs in over 30 Countries

https://www.newsweek.com/trump-admin-investigating-us-taxpayer-funded-biolabs-in-over-30-countrie...
2•rguiscard•37m ago•0 comments

Making Deep Learning Go Brrrr from First Principles

https://horace.io/brrr_intro.html
10•tosh•37m ago•2 comments

Model is currently experiencing high demand

https://mayberay.bearblog.dev/this-model-is-currently-experiencing-high-demand/
1•mugamuga•45m ago•0 comments

New kind of dark tourism emerging in online 'Backrooms,' study shows

https://phys.org/news/2026-05-kind-dark-tourism-emerging-online.html
1•rbanffy•45m ago•0 comments

Laravel Lang Compromised with RCE Backdoor Across 700 Versions

https://socket.dev/blog/laravel-lang-compromise
3•csmantle•53m ago•1 comments

Superior Orders

https://en.wikipedia.org/wiki/Superior_orders
2•chistev•53m ago•0 comments

Toward better handling of major page faults

https://lwn.net/SubscriberLink/1073071/4174eb93ff7ea356/
1•chmaynard•54m ago•0 comments

Four Russian satellites are now within striking distance of an ICEYE radarsat

https://arstechnica.com/space/2026/05/a-satellite-company-supporting-ukraine-appears-to-be-in-rus...
2•lostmsu•55m ago•0 comments

News about Raspberry Pi 6 and Microcontroller Development

https://www.jeffgeerling.com/blog/2026/news-about-raspberry-pi-6-and-microcontroller-development/
2•nfriedly•58m ago•0 comments

Europe Shifts Strategy as CHIPS Act 2.0 Targets Technological "Indispensability"

https://altairmedia.eu/europe-shifts-strategy-as-chips-act-2-0-targets-technological-indispensabi...
1•rbanffy•1h ago•0 comments