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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!

Interview with a Maintainer

https://nesbitt.io/2026/07/24/interview-with-a-maintainer.html
1•ryangibb•1m ago•0 comments

After Parallel Turbo, Keiro launches $0.10/1K web search

https://keirolabs.cloud/bench/keiro-lite-vs-parallel-turbo
1•mannybruv•1m ago•0 comments

Export and Backup All Your ChatGPTs Chats

https://chromewebstore.google.com/detail/chatgpt-to-markdown/dloobgjjpoohngalnjepgdggjeempdec
1•marcofloriano•1m ago•0 comments

Replacing gas stove can help asthmatics as much as some drugs

https://www.theguardian.com/environment/2026/jul/24/replacing-gas-stove-can-help-asthmatics-as-mu...
1•lonelyasacloud•2m ago•1 comments

What Happens When You Eat a Shoe? Health Risks, Safety Concerns and Consequences

https://decentfoot.com/what-happens-when-you-eat-a-shoe/
1•austinallegro•3m ago•1 comments

PCI DSS DMARC Requirement: What Section 5.4.1 Requires

https://dmarcguard.io/blog/pci-dss/
1•meysamazad•5m ago•0 comments

My Emacs Configuration (Dired)

https://eugene-andrienko.com/2026-07-05-my-emacs-configuration-dired.html
1•meysamazad•6m ago•0 comments

Show HN: CockroachCrawler–1 package for crawling,browsers,PDF,extraction,and MCP

https://github.com/AjnasNB/cockroach-crawler
2•Cognifyr•6m ago•0 comments

Kaizen #4: Overhauled Homelab

https://timharek.no/blog/kaizen-4/
2•meysamazad•6m ago•0 comments

Cross-stitch prep for math nerds

https://posh.wiki/blog/2026-07-20-hoop-sizing/
1•speckx•6m ago•0 comments

The linear algebra and calculus behind every model

https://stochastic.blog/the-linear-algebra-and-calculus-behind-every-model/
1•Anon84•7m ago•0 comments

A sidecar named desire (2007)

https://www.scmp.com/article/614660/sidecar-named-desire
1•YeGoblynQueenne•8m ago•0 comments

Show HN: Sequence, a daily spatial number puzzle

https://notebeck.com/sequence/
1•aidanbeck•9m ago•0 comments

Show HN: Invisible color – Logic mini game

https://invisible-color.vercel.app/
1•wrongful1520•10m ago•0 comments

Ask HN: Has your typing gotten worse with AI?

1•aizk•11m ago•1 comments

Examples from sci-fi of voice interfaces that stay on task

https://interconnected.org/home/2026/07/11/on-task
2•surprisetalk•12m ago•1 comments

Frontier-Bench

https://www.frontierbench.ai/announcement
1•stared•14m ago•0 comments

Stop hard-wiring LLMs into your code

https://wso2.com/library/blogs/ai-mediation-layer-ai-gateway/
2•langur•14m ago•0 comments

Setting up a remote environment for agentic coding on a VPS

https://ma.ttias.be/remote-coding-environment-vps/
1•speckx•14m ago•0 comments

Curl Bitsets

https://eissing.org/icing/posts/curl-bitsets/
1•mattjhall•15m ago•0 comments

Where Good Engineers Come From

https://lamis73.substack.com/p/where-good-engineers-come-from
1•Lamis-A•15m ago•0 comments

Show HN: Extension that shows complaints and more on NYC apartment listings

https://streetleaky.com/
1•willmeyers•17m ago•0 comments

Show HN: equitycalculator.org

https://www.equitycalculator.org/
1•morninj•18m ago•0 comments

Oracle fires 21,000 employees to fund AI spending

https://www.jpost.com/business-and-innovation/tech-and-start-ups/article-903442
7•DemiGuru•19m ago•0 comments

Microsoft – Open Weights and American AI Leadership

https://www.microsoft.com/en-us/corporate-responsibility/topics/open-weight/
5•louiereederson•20m ago•0 comments

Spending judgement where it matters: how we structure AI-native delivery

https://www.moystard.com/blog/ai-native-delivery/
1•moystard•22m ago•0 comments

Make an Origami Circuit Board

https://spectrum.ieee.org/origami-circuit-boards
1•dpapathanasiou•23m ago•0 comments

Indian court says OpenAI did not violate news agency ANI's copyright

https://www.reuters.com/legal/litigation/indian-court-rules-favor-openai-copyright-lawsuit-brough...
2•SanjayMehta•24m ago•0 comments

Measuring the Performance Cost of High Availability in Postgres

https://clickhouse.com/blog/postgresbench-ha
1•saisrirampur•24m ago•0 comments

Can This New Enzyme Turn Back the Clock in the Human Body?

https://www.nytimes.com/2026/07/24/science/enzymes-aging-cmlase.html
1•jcfrei•25m ago•0 comments