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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!

Blocking Distracting News Links

https://retout.co.uk/2026/07/10/blocking-distracting-news-links/
1•edward•3m ago•0 comments

Here's Why Some Humans Can Hear Super Low-Frequency Sounds

https://nautil.us/heres-why-some-humans-can-hear-super-low-frequency-sounds-1282626
2•Brajeshwar•4m ago•0 comments

GitByBit

https://gitbybit.com/
1•neochief•4m ago•0 comments

Madame Semver Will See You Now

https://nesbitt.io/2026/05/10/madame-semver-will-see-you-now.html
2•birdculture•6m ago•0 comments

LLMs are adapting their environments to themselves

https://ianbarber.blog/2026/07/11/who-is-walking-who/
1•phpencil•8m ago•0 comments

Show HN: Document Scanner for Freight Verification

https://www.cipherandrow.com/
1•jnowlan21•10m ago•0 comments

Being part of one of the biggest wealth creation events in history (AI)

https://www.washingtonpost.com/technology/2026/07/11/ais-soon-to-be-billionaires-want-know-what-d...
1•bookofjoe•11m ago•1 comments

Bluesky has an official CEO again

https://www.engadget.com/2212928/bluesky-official-ceo-toni-schneider/
1•cdrnsf•11m ago•0 comments

Cuban Missile Crisis II – Cuban Has Drones Capable of Striking the USA

https://jeffreylminch.substack.com/p/cuban-missile-crisis-ii-cuban-has
1•rmason•13m ago•1 comments

Harmonic Contour Integration: Compact, distributed edge detection algorithm

https://github.com/RenderBear/hci
1•RenderBear•13m ago•1 comments

Bitemporal provenance in agent memory: What did we believe, when, and why

1•shanrizvi•13m ago•0 comments

Construction workers, electricians, couriers: ICE disguises to detain migrants

https://english.elpais.com/usa/2026-07-11/construction-workers-electricians-couriers-how-ice-agen...
2•hn_acker•14m ago•2 comments

Restoring and Demoing 1960s Vintage Computers at the Computer History Museum [pdf]

https://ibm-1401.info/pictures/Proc-MIW-2017-Garner-1401PDP1.pdf
2•rbanffy•14m ago•0 comments

Show HN: OpenBenchmarks – Helping agents discover and pick the right SaaS APIs

https://openbenchmarks.com
4•fenilsuchak•15m ago•2 comments

Entire Is building a Git network for agents

https://thenewstack.io/entire-git-for-agents/
1•rmason•16m ago•0 comments

The code review is dead, long live the code review

https://www.thoughtworks.com/en-us/insights/blog/testing/code-review-dead-long-live-code-review
1•backlit4034•16m ago•0 comments

OpenAI Forked Git on GitHub

https://github.com/openai/git
21•rahlokzero•16m ago•15 comments

Why does Opus 4.8 think it's morally superior

1•hughmcinnis•20m ago•0 comments

I built TradingSpy: local, privacy-first AI trading assistant(First Open Source)

https://github.com/mrhustlex/TradingSpy-TradingAgentService
1•mrhustlex•21m ago•0 comments

GPT-5.6-Sol just accidentally deleted almost ALL of my Mac's files

https://xcancel.com/mattshumer_/status/2075657271401390161
3•theanonymousone•22m ago•0 comments

QuickJS: An Embeddable JavaScript Engine

https://bellard.org/quickjs/
1•azhenley•23m ago•0 comments

Modern Design Headache: A Cerebral Basis for Visual Discomfort and Visual Stress

https://www.mdpi.com/2411-5150/10/2/34
1•rawgabbit•29m ago•1 comments

Eden Surge

https://surge.edenictech.com/
1•VictorMgaya•32m ago•0 comments

Show HN: Sanfransim.com – a long waited startup simulation game

https://sanfransim.com/
1•milkers•37m ago•0 comments

The Infrastructure Fallacy: Why Most Sales Problems Are Strategy Prob

https://medium.com/@alanscottencinas/the-infrastructure-fallacy-why-most-sales-problems-are-actua...
1•encinas88•41m ago•0 comments

RetroAchievements

https://retroachievements.org/
1•Tomte•44m ago•1 comments

Forms of life, forms of mind by Dr. Michael Levin

https://thoughtforms.life/a-talk-for-mental-health-professionals/
1•plucafs•44m ago•0 comments

I used to love Claude, but the latest models are slowly ruining it

https://www.androidauthority.com/claude-latest-models-pushback-bad-3683521/
3•Brajeshwar•44m ago•0 comments

Vector Search Is Dead

https://try.agentoid.io/
1•AlpinePrivacy•45m ago•2 comments

Balding Cure?

https://www.popularmechanics.com/science/health/a71891892/balding-cure-chinese-root/
1•donbox•48m ago•0 comments