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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!

2026 Global Peace Index [pdf]

https://www.visionofhumanity.org/wp-content/uploads/2026/06/Global-Peace-Index-2026-Report.pdf
1•simonebrunozzi•59s ago•0 comments

KPMG report on AI found riddled with AI hallucinations

https://www.cityam.com/kpmg-report-on-ai-found-riddled-with-ai-hallucinations/
1•chrisjj•1m ago•0 comments

Compute 'S Atari ST Reference Books – By Paul Lefebvre

https://www.goto10retro.com/p/computes-atari-st-reference-books
1•rbanffy•2m ago•0 comments

Ask HN: I am a junior CS and math major. I have no hope for SWE or math. Advice?

1•jidhn•4m ago•0 comments

Seer – an Ollama workspace where two models build and review code

https://manticthink.com/c/a57jfwt
1•SEERai•7m ago•0 comments

Show HN: I hate typing continue once my CC quota resets

https://github.com/softcane/cc-session-recover
1•pradeep1177•7m ago•0 comments

Frona v2026.6.0 – self-hosted personal AI assistant

https://github.com/fronalabs/frona/releases/tag/v2026.6.0
1•syncerx•7m ago•0 comments

Itty Bitty Mosquito Committee

https://www.ittybittymosquitocommittee.org
1•mlinksva•7m ago•0 comments

Chaosnet

https://tumbleweed.nu/r/lm-3/uv/amber.html
2•RGBCube•11m ago•0 comments

Road trip – Drop Junk Cars – Cows aren't hurt

https://screen.toys/roadtrip/
1•gurjeet•12m ago•0 comments

Einstein's Mirror

https://sketchplanations.com/einsteins-mirror
1•nate•12m ago•0 comments

Yserver: A modern X11 server written in Rust

https://github.com/joske/yserver
3•Venn1•15m ago•0 comments

Mathematical and Algorithmic Specification of an Advanced Cognitive Architecture

https://zenodo.org/records/20684784
1•hiddenarchitect•15m ago•0 comments

Ask HN: Which Free Software or Open Source Project Needs Help?

3•em-bee•16m ago•1 comments

Why isn't the external link symbol in Unicode? (2018)

https://dafoster.net/articles/2018/11/24/why-isnt-the-external-link-symbol-in-unicode/
1•downbad_•17m ago•1 comments

One Moving Part: The Forest Service Ax Manual

https://www.fs.usda.gov/inside-fs/delivering-mission/deliver/one-moving-part-forest-service-ax-ma...
1•helterskelter•17m ago•0 comments

Android's head of security slams Google's door

https://www.lesnumeriques.com/societe-numerique/la-direction-a-perdu-toute-boussole-morale-le-che...
1•trilogic•18m ago•0 comments

Losing on Purpose: The Economics of NBA Tanking

https://myteamtanks.com/
2•jonbaer•19m ago•0 comments

The Telematico NMS3000 – Celso Martinho

https://celso.io/posts/2026/06/13/telematico/
1•rbanffy•19m ago•0 comments

Karpathy on Why 'Edutainment' Isn't Real Learning (Seek the Sweat) (2024)

https://twitter.com/karpathy/status/1756380066580455557
1•laxmena•21m ago•1 comments

Audit checklists for AI coding agents – 30 invariants, any language

https://github.com/danygiguere/audit-skills
1•danygiguere•23m ago•0 comments

Encrypted-File-Server: FTP/SFTP/WebServer Encryption Proxy

1•amir734jj•26m ago•0 comments

Anthropic staff to meet White House officials next week

https://www.reuters.com/world/us/anthropic-staff-meet-white-house-officials-next-week-axios-repor...
2•mfiguiere•27m ago•1 comments

Show HN: Data-review, diff the data/numbers a PR changes

https://github.com/10fra/data-review
1•refsab•27m ago•0 comments

Using Notes in the Glasgow Haskell Compiler

https://gitlab.haskell.org/ghc/ghc/-/wikis/commentary/coding-style#2-using-notes
1•birdculture•28m ago•0 comments

What the gym taught me about China's relentless competition

https://www.ft.com/content/a06fe97f-410a-40b4-a2a3-f4c827de3053
2•bookofjoe•33m ago•1 comments

The Millions of Songs Mashed into AI-Generated Music

https://www.theatlantic.com/technology/2026/06/ai-music-generators-suno-google-udio/687485/
1•fortran77•33m ago•0 comments

Smartphones arrived just before the US fertility rate plunged

https://www.cnn.com/2026/06/12/health/fertility-decline-smartphone-study
2•bhouston•34m ago•0 comments

Nobody Is Measuring What Your AI Agents Are Worth

https://github.com/Idank96/agent-panorama
1•Idankogan•35m ago•1 comments

Nudge – a collaborative memory layer for Claude Code and Codex CLI hooks

https://github.com/attunehq/nudge
1•mpgirro•35m ago•0 comments