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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!

OpenAI agent swarm posted two FBI database API keys, and hit two universities

https://twitter.com/kennethrdegraff/status/2096028829890625978
1•ericzawo•1m ago•0 comments

Over 5,400 hacked sites serve ClickFix payloads stored on the blockchain

https://www.bleepingcomputer.com/news/security/over-5-400-hacked-sites-serve-clickfix-payloads-st...
1•sbulaev•1m ago•0 comments

Bringing modern USB xHCI support to Windows 98/ME/2K

https://yeokhengmeng.com/2026/08/xhci98-usb-host-driver/
1•ingve•1m ago•0 comments

GPT-6 Astra might be too powerful to understand or control

https://www.transformernews.ai/p/openai-gpt-6-astra-might-be-too-powerful-to-understand-or-control
2•rome•4m ago•1 comments

Jsonquery – A native desktop GUI for querying JSON (jq, JSONPath, JMESPath)

https://github.com/nujufas/jsonquery_gui
1•nujufas•5m ago•0 comments

Jank reimagines C++ errors and gets an official native package repo

https://jank-lang.org/blog/2026-09-04-better-and-better/
1•birdculture•7m ago•0 comments

How OpenAI Agents planned their escape

https://www.youtube.com/watch?v=EbZr33dXFF4
2•arsen3d•7m ago•0 comments

An Underrated Refactor Saved 90% Memory Usage

https://tanstack.com/blog/tanstack-table-v9-memory-performance
1•fagnerbrack•7m ago•0 comments

Saying Goodbye to My Git Server's CGit Front End

https://www.worthe-it.co.za/blog/2026-09-05-saying-goodbye-to-my-git-servers-cgit-frontend.html
1•ingve•8m ago•0 comments

LeanHTTP: HTTP Client for Lean 4

https://github.com/theoriclabs/leanhttp
1•hargup•8m ago•0 comments

Fat City, Fifty Years Later: An Interview with Leonard Gardner

https://www.theparisreview.org/blog/2019/02/06/fat-city-fifty-years-later-an-interview-with-leona...
1•georgex7•9m ago•0 comments

TreasuryDirect is introducing a new login experience using ID.me

https://treasurydirect.gov/savings-bonds/idme-sep4/
1•foresto•10m ago•0 comments

Are warnings of uncontrollable AI coming true?

https://www.theguardian.com/technology/2026/sep/05/uncontrollable-ai-artificial-general-intellige...
2•fittingopposite•12m ago•0 comments

Why Google is helping homeowners buy heat pumps

https://www.fastcompany.com/91601909/why-google-is-helping-homeowners-buy-heat-pumps
1•caseyf7•14m ago•0 comments

KingFy – an AI super app orchestrating 1,200 specialized agents

https://www.kingfy.app
1•kingfyapp•15m ago•0 comments

Show HN: Myjs An accidental pure-Python JavaScript interpreter

https://pypi.org/project/myjs/
4•byteface•16m ago•0 comments

Context Layer for Product Decisions

https://www.atisbo.dev
1•Coleg•17m ago•0 comments

Trump threatens to halt trade with top partners unless Fed cuts rates

https://www.cnbc.com/2026/09/04/trump-fed-rates-jobs-trade.html
2•ivell•17m ago•0 comments

The Inter Typeface Family

https://rsms.me/inter/
1•azhenley•18m ago•0 comments

An Accidental Blackboard

https://martinfowler.com/articles/exploring-gen-ai/an-accidental-blackboard.html
1•saikatsg•18m ago•0 comments

Mudlarking: Searching the River Thames for Historical Artifacts [video]

https://www.youtube.com/watch?v=HBuixfZC-Ao
1•kzrdude•19m ago•0 comments

DartNative: Beyond the Limits of React Native and Flutter

1•iosephmagno•19m ago•0 comments

Reading About the (2008) Financial Crisis: A 21-Book Review, by Andrew Lo (2012) [pdf]

https://www.stat.berkeley.edu/~aldous/157/Papers/lo.pdf
1•ggcr•20m ago•0 comments

C++26: Std:Hive

https://www.sandordargo.com/blog/2026/09/02/cpp26-hive
1•jandeboevrie•21m ago•0 comments

People Keep Sneaking into New York City Sewers. No One Knows Why

https://www.nytimes.com/2026/08/30/nyregion/manholes-sewers-nyc.html
2•paulpauper•23m ago•0 comments

Continuous Profiling and UI Profiling

https://sentry.io/changelog/continuous-profiling-and-ui-profiling/
1•imangsgu•23m ago•0 comments

We built our house for LAN parties

https://lanparty.house/
3•fittingopposite•23m ago•0 comments

Controlling when CSS custom property values are computed

https://jakearchibald.com/2026/css-custom-property-compute-time/
1•ingve•25m ago•0 comments

Show HN: Genetic Distance Map

https://p.migdal.pl/genetic-distance-map/
1•stared•27m ago•0 comments

Another heart drug fails, previously assumed to be the vanguard of a new era

https://www.nytimes.com/2026/09/04/science/heart-drug-fails-novartis-pelacarsen.html
2•marojejian•28m ago•1 comments