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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!

De-slop the text you shouldn't be writing anyway

https://blog.stephenturner.us/p/deslop
1•epistasis•34s ago•0 comments

Agentic engineering: a practical guide to reliable coding agents

https://scottspence.com/posts/agentic-engineering-practical-guide
1•mellosouls•1m ago•0 comments

Police Are Spending Opioid Settlement Funds on Flock Cameras

https://www.motherjones.com/politics/2026/08/police-opioid-funding-flock-alpr-camera-surveillance...
1•cdrnsf•2m ago•0 comments

Nuisance-call blocker fined £190k for being a nuisance caller

https://www.theregister.com/security/2026/08/27/nuisance-call-blocker-fined-190k-for-being-a-nuis...
1•joebuckwilliams•2m ago•0 comments

Watch the temperature of the moon during the eclipse tonight

https://moontemperature.com/
1•axolve•3m ago•1 comments

Omarchy distro gains serious backing

https://www.theregister.com/os-platforms/2026/08/27/omarchy-distro-gains-serious-backing/5293026
1•joebuckwilliams•3m ago•0 comments

Placemark is now open source

https://macwright.com/2026/08/25/placemark-fully-open-source
1•leephillips•4m ago•0 comments

Google Search Trend for Human

https://trends.google.com/explore
2•impjohn•5m ago•0 comments

Former Twitter lawyer launches Twitter.now

https://trademarklawyermagazine.com/former-twitter-lawyer-launches-twitter-now-as-trademark-battl...
2•tevrede•5m ago•0 comments

The Flakiness.io Analytics Engine

https://blog.flakiness.io/posts/2026/engine/
1•aslushnikov•5m ago•0 comments

Vercel WebGPU library, designed for agents

https://vgpu.sh
1•hugodan•7m ago•0 comments

Systemengineering: Requirements Mapping

https://share.wyzer.it/dataisbeautiful_wyzer.png
1•wyzer•7m ago•0 comments

Twitch reporting major outage across web, chat and video delivery

https://status.twitch.com
2•supernes•11m ago•1 comments

YeshiAI: Prayer, Journaling, Study and Spiritual Growth with AI

https://yeshi.ai/
1•eli_genc•11m ago•1 comments

Is This Why the Treasury Secretary Is Blocking Epstein's Financial Records?

https://kaitjustice.substack.com/p/bessent-kushner-55-billion-ea-deal-epstein
3•CGMthrowaway•11m ago•0 comments

Google tells Android app developers to cool it on memory use, or else

https://www.theverge.com/tech/985679/google-play-android-17-memory-limit
1•stalfosknight•12m ago•0 comments

The Banishment of Beauty from Everyday Life

https://www.honest-broker.com/p/the-banishment-of-beauty-from-everyday
1•CGMthrowaway•12m ago•0 comments

UniBLEed: Unauthenticated Root RCE on Any Unitree G1 Humanoid Robot

https://boschko.ca/g1-ble-rce/
1•Boschko•13m ago•0 comments

Delete YouTube Joke

https://delete-youtube-joke.b-saatsazov.workers.dev/
1•rowid•15m ago•0 comments

Show HN: Public threads that branch when you reply

https://app.treechat.com/quest/post-0e602844-aa9a-4040-a637-02403bdc8284
1•mitya777•16m ago•0 comments

There's a Decimal Point on That Speed Limit Sign. Here's Why

https://www.rd.com/article/decimal-point-speed-limit-sign/
1•gmays•16m ago•0 comments

Show HN: Qbix webserver 1.0, is able to handle 100x more traffic than Nginx+PHP

https://github.com/Qbix/webserver
2•EGreg•16m ago•0 comments

Show HN: An open T2I benchmark with all 9k+ generated images published

https://imagebench.ai/gallery
1•damien_henry•17m ago•0 comments

How Americans See EU Tech - Kai Lentit [video]

https://www.youtube.com/watch?v=gGlpBuW6ZFc
1•tcumulus•18m ago•0 comments

Inter-trial convergence of neural task states supports cognitive flexibility

https://www.cell.com/current-biology/fulltext/S0960-9822(26)00927-9
1•wertyk•19m ago•0 comments

First contracts kick off European Launcher Challenge

https://www.esa.int/Enabling_Support/Space_Transportation/First_contracts_kick_off_European_Launc...
1•rbanffy•19m ago•0 comments

Show HN: Black Friday is in 91 days

https://blackfriday.tools
1•buildItN0w_•21m ago•0 comments

Salesforce puts its CRM inside Claude – says you won't need the app

https://venturebeat.com/orchestration/salesforce-just-put-its-entire-crm-inside-claude-and-says-y...
2•wertyk•21m ago•0 comments

US Aims to Revive Civil War-Era Court to Claim Iran Oil as Prize

https://news.bloomberglaw.com/us-law-week/us-aims-to-revive-civil-war-era-court-to-claim-iran-oil...
5•throw0101d•25m ago•0 comments

Show HN: Context-Aware Header Audit; Built for Learning, Not for Scores (German)

https://www.scraptrap.de/scraptrap_http_header_audit.php
1•UJ-FLD-ScrTr•25m ago•0 comments