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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•8mo 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!

The Chemistry of Tea [pdf]

https://www.researchgate.net/profile/Matthew-Harbowy/publication/216792045_Tea_Chemistry/links/09...
1•aabiji•1m ago•0 comments

/Vibe – Social Layer for Claude Code

https://www.slashvibe.dev/
1•janpio•3m ago•0 comments

Nametag: A simple, yet effective Personal Relationship Manager

https://github.com/mattogodoy/nametag
1•simonpure•3m ago•0 comments

Differential Dataflow

https://github.com/TimelyDataflow/differential-dataflow
1•tosh•4m ago•0 comments

Single Entry Point Layer Is Underrated at Large Companies

https://medium.com/@HobokenDays/single-entry-point-layer-is-underrated-e116eab03b53
1•HideInNews•5m ago•0 comments

Do you have one of these 17 browser extensions? They could be tracking your brow

https://mashable.com/article/malicious-browser-extensions-malware-delete
1•cyrc•5m ago•0 comments

Show HN: A tiny JavaScript library for content origin metadata (no truth claims)

https://originjs.netlify.app/
1•dheerazmakes•5m ago•0 comments

Iran Govt Fakes Traffic to Mimic Internet Restoration

https://mastodon.social/@netblocks/115942585753525035
3•us321•7m ago•0 comments

Breakthroughs for preventing pistachio hull split

https://phys.org/news/2026-01-breakthroughs-pistachio-hull.html
1•politelemon•7m ago•0 comments

Show HN: Instagram: Private Posts Exposed to Unauthenticated Requests

https://github.com/jatin-dot-py/instagram-private-bypass
1•jatin-dot-py•8m ago•0 comments

Why Every Developer Should Become a Designer in the Age of AI

https://twitter.com/diegohaz/status/2014772559863283852
1•hazdiego•9m ago•0 comments

Tesla kills Autopilot, locks lane-keeping behind $99/month fee

https://arstechnica.com/cars/2026/01/tesla-wants-recurring-revenue-discontinues-autopilot-in-favo...
14•CharlesW•10m ago•0 comments

Ask HN: Do you "micro-manage" your agents?

1•xinbenlv•10m ago•1 comments

Semi-working desktop based on runtime Windows 3.10 shipped with Win 95 installer

https://tech.lgbt/@nina_kali_nina/115871854239918291
1•PaulHoule•11m ago•0 comments

Show HN: Building Memory as a Service with Memrun

https://www.autoencoders.com/papers/building-memory-as-a-service/
1•jmulla•11m ago•1 comments

Tesla convicted 18 times for failing to help UK police with investigations

https://www.lbc.co.uk/article/tesla-elon-musk-car-convicted-5HjdR8N_2/
4•rbanffy•13m ago•0 comments

EFF calls Daybreak a copyright bully over its EverQuest emulator lawsuit

https://massivelyop.com/2026/01/20/the-electronic-frontier-foundation-calls-daybreak-a-copyright-...
4•speckx•16m ago•0 comments

Dismantling Dark Patterns Using TDD via Discovery and Injunctions

2•marc_litchfield•16m ago•0 comments

Closed Loop Authoritarianism: How AI and Users Radicalize Each Other [pdf]

https://networkcontagion.us/wp-content/uploads/Closed-Loop-Authoritarianism_-How-AI-and-Users-Rad...
3•Stratoscope•16m ago•1 comments

The Long View of History

https://brianschrader.com/archive/the-long-view-of-history/
1•sonicrocketman•17m ago•0 comments

Why Read Novels?

https://dynomight.substack.com/p/novels
2•paulpauper•17m ago•0 comments

Brussels pushes for stronger cybersecurity oversight of high-risk technology

https://www.euronews.com/next/2026/01/20/brussels-pushes-for-stronger-cybersecurity-oversight-of-...
2•rbanffy•17m ago•0 comments

Slightly Against the "Other People's Money" Argument Against Aid

https://www.astralcodexten.com/p/slightly-against-the-other-peoples
1•paulpauper•18m ago•0 comments

Show HN: I wrote a "Senior Engineer" doctrine file for my agents called AI Lint

https://ai-lint.dosaygo.com
1•keepamovin•19m ago•1 comments

Show HN: UnboundChat – Privacy-First OpenRouter Client for Android and Windows

https://unboundchat.net/
1•Valvoa•19m ago•0 comments

Scalability but at What Cost? (2015)

http://www.frankmcsherry.org/graph/scalability/cost/2015/01/15/COST.html
1•tosh•20m ago•0 comments

Minutes to Seconds: Redefining Five-Minute Rule for AI-Era Memory Hierarchies

https://arxiv.org/abs/2511.03944
1•transpute•20m ago•0 comments

EgyLinux Archive

https://egylinux.lr0.org
1•lr0•22m ago•0 comments

The R^2 vs. R debate in IQ research

https://www.technotheoria.org/p/the-r2-vs-r-debate-in-iq-research
1•paulpauper•22m ago•0 comments

The Democrats Taking On Lauren Boebert And how we'll decide who to back

https://www.americanmuckrakers.com/p/the-democrats-taking-on-lauren-boebert
2•davidbwheeler•23m ago•0 comments