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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•7mo 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!

EZ File Changer – Private, client-side image converter

https://www.ezfilechanger.com
1•waqaar-ansari•6m ago•0 comments

Ozempic Turned a 1970s Hit into an Inescapable Jingle (2024)

https://www.nytimes.com/2024/04/09/arts/music/ozempic-jingle-oh-oh-oh-its-magic-pilot.html
1•nxobject•16m ago•0 comments

Firefox Version 146.0

https://www.firefox.com/en-US/firefox/146.0/releasenotes/
2•ksec•20m ago•1 comments

Can't take setting up another bucket for images

https://images.labnocturne.com/
2•jjenkins•23m ago•0 comments

Switzerland Engineered the Perfect Country [video]

https://www.youtube.com/watch?v=OMbV1rIPhCg
2•keepamovin•31m ago•0 comments

The New Allowance

https://www.theatlantic.com/family/2025/12/kids-allowance-investing-parenting/685214/
2•gmays•39m ago•0 comments

Show HN: Zootopia OC Maker – Create Zootopia-Style Original Characters with AI

https://aiocmaker.com/oc-maker/zootopia-oc-maker
1•qianjin1979•40m ago•0 comments

Is Prompt Engineering Dead? Only If You're Still Prompting Like It's 2023

https://news.ycombinator.com/macos-release-notes/macos-26-2-release-notes
1•ahmedkarem•42m ago•0 comments

Ask HN: How do you manage curl commands in your workflow?

1•subashn•50m ago•0 comments

Music Algorithms Failed Us

https://therectangle.substack.com/p/music-algorithms-failed-us
4•olyellybelly•57m ago•0 comments

Show HN: ADK-Rust: a Rust Implementation of Google Agent Dev Kit

https://adk-rust.com
1•Zavora•1h ago•0 comments

There is no data-generating distribution

https://www.argmin.net/p/there-is-no-data-generating-distribution
1•gmays•1h ago•0 comments

Satya Nadella demos an app he built [video]

https://www.youtube.com/watch?v=SEZADIErqyw
1•ankitg12•1h ago•0 comments

Marco Rubio: No more woke fonts

https://www.theatlantic.com/newsletters/2025/12/marco-rubio-woke-font-calibri/685212/
3•atakan_gurkan•1h ago•3 comments

Democratic states sue Trump administration over new $100k fee for H-1B visas

https://www.cnn.com/2025/12/12/politics/h-1b-visa-fee-lawsuit
1•Beijinger•1h ago•0 comments

Writing a Type-Safe Linux Perf Interface in Zig

https://pyk.sh/blog/2025-12-11-type-safe-linux-perf-event-open-in-zig
3•peeyek•1h ago•0 comments

Google and Apple roll out emergency security updates after zero-day attacks

https://techcrunch.com/2025/12/12/google-and-apple-roll-out-emergency-security-updates-after-zero...
3•colanderman•1h ago•0 comments

Unitree Debuts Robot "App Store"

https://twitter.com/UnitreeRobotics/status/1999712278204285361
3•elfbargpt•1h ago•0 comments

Show HN: Browser4 – an open-source browser engine for agents and concurrency

https://github.com/platonai/Browser4
2•galaxyeye•1h ago•0 comments

How Long Does It Take to Merge a PR into VSCode?

https://joseph-xiao.notion.site/How-Long-Does-It-Take-to-Merge-a-PR-into-VSCode-2c824be1b42e80e48...
1•jxiao32•1h ago•1 comments

MongoKV – Tiny async/sync key–value store on top of MongoDB

https://harrisonerd.com/mongokv/
1•harrisonerd•1h ago•1 comments

Cybercriminals are exploiting ChatGPT and Grok to spread AMOS malware to Macs

https://techoreon.com/cybercriminals-exploit-chatgpt-grok-amos-malware-macos/
6•ashishgupta2209•1h ago•1 comments

SpaceX Valued at $800B, as It Prepares to Go Public

https://www.nytimes.com/2025/12/12/technology/elon-musk-spacex-ipo.html
2•hockeyface•1h ago•0 comments

Doxers Posing as Cops Are Tricking Big Tech Firms into Sharing People's Data

https://www.wired.com/story/doxers-posing-as-cops-are-tricking-big-tech-firms-into-sharing-people...
29•iamnothere•1h ago•7 comments

Apples

https://xkcd.com/3180/
1•baruchel•1h ago•0 comments

Contra four-wheeled suitcases, sort of (2023)

https://dynomight.net/luggage/
1•Ariarule•1h ago•1 comments

Recovering Anthony Bourdain's (really) lost Li.st's

https://sandyuraz.com/blogs/bourdain/
2•gregsadetsky•1h ago•1 comments

Scientists Uncover Key Driver of Treatment-Resistant Cancer

https://today.ucsd.edu/story/scientists-uncover-key-driver-of-treatment-resistant-cancer
3•gmays•1h ago•0 comments

Apple has locked my Apple ID, and I have no recourse. A plea for help

https://hey.paris/posts/appleid/
192•parisidau•1h ago•65 comments

The Invitation-Only Stock Market for the Wealthy

https://www.wsj.com/finance/investing/private-stock-market-growth-bb71bde1
5•mudil•1h ago•3 comments