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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•6mo 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!

Privacy People- a Documentary About Privacy and the Privacy Profession

https://www.youtube.com/watch?v=EqZOzwVaZp8
1•bteamfilms•1m ago•1 comments

An AI for an AI: Anthropic says AI agents require AI defense

https://www.theregister.com/2025/12/05/an_ai_for_an_ai/
1•speckx•4m ago•0 comments

The Data on Self-Driving Cars Is Clear. We Have to Change Course

https://www.nytimes.com/2025/12/02/opinion/self-driving-cars.html
1•fortran77•5m ago•2 comments

The Big Blind

https://avc.xyz/the-big-blind
1•wslh•5m ago•0 comments

Show HN: Notekit – A Privacy-First Note-Taking Extension for Chrome

https://chromewebstore.google.com/detail/notekit-smart-note-taking/odlainjhjhfffelembfofofpebneonfn
1•kamdev•9m ago•0 comments

The Surprisingly Complicated World of SMS: Emoji SMS Reactions

https://nickvsnetworking.com/the-surprisingly-complicated-world-of-sms-emoji-sms-reactions/
1•speckx•9m ago•0 comments

Emacs Is My New Window Manager

https://www.howardism.org/Technical/Emacs/new-window-manager.html
1•gpi•10m ago•0 comments

Simplicity of a Database, but the Speed of a Cache: OLAP Caches for DuckDB

https://motherduck.com/blog/duckdb-olap-caching/
1•articsputnik•11m ago•0 comments

Error Handling Patterns (2023)

https://andreabergia.com/blog/2023/05/error-handling-patterns/
1•Wingy•11m ago•0 comments

Show HN: Kronos – Type-safe trading framework in Go with terminal UI

https://github.com/backtesting-org/kronos
1•lkwtsn•12m ago•0 comments

Agent Client Protocol (ACP) Lands to JetBrains IDEs

https://blog.jetbrains.com/ai/2025/12/bring-your-own-ai-agent-to-jetbrains-ides/
2•ignatovs•13m ago•1 comments

Show HN: PastScreen – open-source macOS screenshot tool that grabs file paths

https://github.com/augiefra/PastScreen
1•augiefra•13m ago•1 comments

Search 11,000 amendments to the U.S. Constitution proposed between 1789 and 2022

https://amendmentsproject.org/about
1•keepamovin•14m ago•0 comments

Show HN: PGM-Extra – High-performance learned index structures for Rust

https://github.com/itsfoxstudio/pgm-extra-rs
1•rpunkfu•14m ago•0 comments

Show HN: Losselot – See if your FLACs are fibbing, catch encoding audio relics

https://github.com/notactuallytreyanastasio/losselot
1•rhgraysonii•16m ago•0 comments

When Product Markets Become Collective Traps: The Case of Social Media

https://www.aeaweb.org/articles?id=10.1257/aer.20231468
1•tomrod•17m ago•1 comments

Free Gemini Watermark Remover

https://geminiwatermark.online
2•ocmaker•17m ago•0 comments

Show HN: A tool to visualize and map dependency hell in legacy COBOL codebases

https://apps.microsoft.com/detail/9n1b6m4fz1c8?hl=en-US&gl=US
1•NabilChiheb•19m ago•0 comments

First English language slang dictionary (1698)

https://languagelog.ldc.upenn.edu/nll/?p=72066
1•bookofjoe•19m ago•0 comments

CSS Fizz Buzz

https://susam.net/css-fizz-buzz.html
1•blenderob•21m ago•0 comments

The "soft" racism of the well-meaning white liberal, myself included

https://ncte.org/blog/2017/12/soft-racism-well-meaning-white-liberal-included/
3•volemo•24m ago•1 comments

Rad: Modern CLI scripts made easy

https://github.com/amterp/rad
1•nateb2022•25m ago•0 comments

The lethal trifecta and how to defend against it

https://hiddenlayer.com/innovation-hub/the-lethal-trifecta-and-how-to-defend-against-it/
1•beabytes•26m ago•0 comments

Influential study on glyphosate safety retracted 25 years after publication

https://www.lemonde.fr/en/environment/article/2025/12/03/influential-study-on-glyphosate-safety-r...
6•isolli•27m ago•0 comments

CLI tool to hop between AI CLI tools

2•gtomicognjen•27m ago•0 comments

Show HN: PaperProfit – learn investing and trading by doing

https://github.com/pg1/paper-profit
2•pg1•27m ago•0 comments

Track hours, projects, and invoice with ease

https://worktracks.xyz
2•M0HD197•29m ago•2 comments

Supabase for Platforms

https://supabase.com/blog/introducing-supabase-for-platforms
1•adamfeldman•30m ago•0 comments

German BSI certifies first SmartCards with quantum-secure encryption methods

https://www.mpi-sp.org/77511/news_publication_24089160_transferred
1•speckx•30m ago•0 comments

MIT engineers design an aerial microrobot that can fly as fast as a bumblebee

https://news.mit.edu/2025/mit-engineers-design-aerial-microrobot-fly-like-bumblebee-1203
2•fcpguru•31m ago•0 comments