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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!

OneZoom: Tree of Life Explorer

https://www.onezoom.org/
1•thunderbong•1m ago•0 comments

Tadao Ando Designed&Donated a Floating Library That Delivers Books to Children

https://spoon-tamago.com/tadao-ando-kagawa-floating-library/
1•bookofjoe•2m ago•0 comments

Ask HN: Anyone using DeepSeek Harness (dsh) as part of a customer-facing agent?

1•mmartindevelope•7m ago•0 comments

Joy's Law (Management)

https://en.wikipedia.org/wiki/Joy%27s_law_(management)
1•brewmarche•8m ago•0 comments

Academic Doomerism

http://muratbuffalo.blogspot.com/2026/09/academic-doomerism.html
1•zdw•12m ago•0 comments

Communicating schwa is impossible in written English

https://ashishb.net/linguistics/schwa/
2•ashishb•12m ago•0 comments

Research that compiles: typed claims, conflict detection and next actions

https://grainulator.app/playground/
3•aid-ninja•12m ago•1 comments

PyPy v8.0.0 Release

https://pypy.org/posts/2026/09/pypy-v800-release.html
2•lumpa•13m ago•0 comments

Humanism Without (All) Humans

https://contraptions.venkateshrao.com/p/humanism-without-all-humans
1•zdw•13m ago•0 comments

Semantic end-to-end agent testing for iOS, Android, and web using Jev

https://www.tryconvoy.xyz
1•gokulnair2001•16m ago•1 comments

India Outsourcing Shifts Upmarket as AI Reshapes Jobs, ING Says

https://www.bloomberg.com/news/articles/2026-09-17/india-outsourcing-shifts-upmarket-as-ai-reshap...
1•porridgeraisin•17m ago•1 comments

V Language Review (2023)

https://n-skvortsov-1997.github.io/reviews/
2•lr0•17m ago•0 comments

An old systems problem with a new AI twist: data movement

https://twitter.com/nk_developer1/status/2101028456083677524
2•limestoneai•18m ago•0 comments

Show HN: I am vibe coding a drone

https://ai-eng-design-production.up.railway.app/login
1•couAUIA•21m ago•0 comments

Show HN: CAS-X – An automated compliance matrix for the Amaya Axioms (v5.0)

1•richardaamaya•22m ago•0 comments

Politician's Syllogism

https://en.wikipedia.org/wiki/Politician%27s_syllogism
1•shmistory•23m ago•0 comments

Engineering for Slow Internet (2024)

https://brr.fyi/posts/engineering-for-slow-internet
2•initramfs•26m ago•0 comments

Show HN: Set, offline Markdown note-taking app with device-to-device sync

https://app.writewithset.com
1•aavshr•27m ago•0 comments

Analysis busts myths of Roman road network

https://www.rnz.co.nz/news/world/1475587/analysis-busts-myths-of-roman-road-network-and-offers-in...
2•colinprince•30m ago•0 comments

Direct Imaging of a Giant Planet and Debris Disk Around M-Dwarf RX J0534.0-0221

https://arxiv.org/abs/2609.20748
2•Betelbuddy•31m ago•0 comments

Why AI Cannot Save an Enterprise That Doesn't Understand Its Data

https://architectureintel.com/why-ai-cannot-save-an-enterprise-that-doesnt-understand-its-data-83...
2•younss•31m ago•0 comments

Oregon data centers: 111 facilities consume nearly 1/4 of state's power

https://www.opb.org/article/2026/09/17/oregon-data-centers-consume-quarter-state-power-report/
3•awnird•32m ago•1 comments

Regulate and Standardize AI? Nope

https://www.tbray.org/ongoing/When/202x/2026/09/18/On-Regulating-AI
1•airhangerf15•40m ago•0 comments

Show HN: Forexfin – Trading calculators, alerts and a journal in one place

https://forexfin.tech/
1•howtobatman101•41m ago•0 comments

Show HN: Kibana-agent – query Kibana logs from CLI

https://github.com/hyzyla/kibana-agent
1•hyzyla•46m ago•0 comments

Show HN: Detecting Volumetric DDoS via Covariance Manifold Topology Collapse

https://github.com/PJHkorea/homeostasis-ingress-firewall
1•PJHkorea•49m ago•1 comments

America Has the AI Lead. Beijing Wants It Slowed and D.C.Is Building a Chokehold

https://floppingaces.net/most-wanted/america-built-the-worlds-ai-lead-now-beijing-wants-it-slowed...
3•rmason•54m ago•0 comments

There Are Over 1M NYC Street Signs. Here is How They Are Made.

https://www.nytimes.com/2026/08/15/nyregion/nyc-street-sign-shop.html
5•bookofjoe•56m ago•1 comments

Fat Bear Bracket for Katmai Fat Bear Week

https://fatbearbracket.com/
3•pizzathyme•57m ago•0 comments

A Call for Open Science in AI Safety

https://make-safety-open.github.io/
2•lllllm•57m ago•0 comments