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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!

Direct Marketing to a Starving Crowd

https://www.thegaryhalbertletter.com/newsletters/direct_marketing_to_a_starving_crowd.htm
1•mooreds•1m ago•0 comments

Drinking AI: AI/Water Consumption Comparisons to Beverages

https://maxghenis.com/drinking-ai/
1•atlasunshrugged•1m ago•0 comments

Latta Java

https://lattejava.org
2•mooreds•1m ago•0 comments

Pigiaminja: PostgreSQL extension that adds Jinja template support to COPY TO

https://github.com/leomos/pigiaminja
1•leomos•5m ago•1 comments

Show HN: Tinysandbox – An ultra-minimal sandbox with QuickJS WASM isolates

https://github.com/danthegoodman1/tinysandbox
2•dangoodmanUT•6m ago•0 comments

Zuckerberg's Increasingly Bizarre War on Whistleblowers

https://pluralistic.net/2026/06/27/zuckerstreisand-2/#autodisparagement
2•deely3•7m ago•0 comments

Search Less, Browse More

https://buttondown.com/hillelwayne/archive/search-less-browse-more-7595/
1•ravenical•10m ago•0 comments

Installing A/UX 1.1 like it's the 90s

https://thomasw.dev/post/aux11/
2•zdw•11m ago•0 comments

The Plight of the Martian Farmer

https://mceglowski.substack.com/p/the-plight-of-the-martian-farmer
2•zdw•14m ago•0 comments

Turn any photo into an emoji mosaic, 100% in the browser

https://emojimosaic.org/
2•lawrenceTang•17m ago•0 comments

Okf-skill – progressive disclosure and deterministic conformance scaffolders

https://github.com/rakibtg/okf-skill
1•rakibtg•18m ago•0 comments

Germany's 60K-game preservation project collapses after €1.5M funding dries up

https://www.tomshardware.com/video-games/retro-gaming/germanys-1-5-million-project-to-build-the-w...
1•LorenDB•19m ago•0 comments

A Midsummer Night's Inferno

https://www.ft.com/content/1f36cc97-875c-405d-b895-fede135e0cf7
1•bookofjoe•25m ago•0 comments

Show HN: Code-Manager

https://maguowei.github.io/code-manager/
1•maguowei•27m ago•0 comments

France Survives a Terrible War–England Prepares for Aztec Hell

https://neoworld2027.blogspot.com/p/blood-sweat-cheers-france-survive-ugly_0978048937.html
1•odilelof•27m ago•0 comments

Show HN: Battle City Like Game I Made with Classmates 14 Years Ago

https://massacre.twocubes.io
2•chernikovalexey•27m ago•3 comments

The biggest iceberg has melted away, aged 40 or so

https://economist.com/obituary/2026/07/02/a23a-had-more-adventures-than-most
1•_tk_•28m ago•0 comments

Autonomous flying umbrella follows and shields users from rain and sunlight

https://www.designboom.com/technology/autonomous-flying-umbrella-follows-users-rain-sunlight-i-bu...
3•amichail•29m ago•1 comments

Dissolving Markets: How Sharing Technology Redistributes Power

https://lumramabaja.com/posts/dissolving-markets-how-sharing-technology-redistributes-power/
2•irwt•30m ago•0 comments

Learning to Replicate Expert Judgment in Financial Tasks

https://thinkingmachines.ai/news/learning-to-replicate-expert-judgment-in-financial-tasks/
1•Anon84•32m ago•0 comments

Social media bans don't protect adults from harm–here's what to do

https://www.neowin.net/editorials/social-media-bans-for-kids-dont-protect-adults-against-harms-he...
3•01-_-•33m ago•0 comments

Simulating satellite networks with open source tools (2024)

https://medium.com/@jmwanderer/simulating-satellite-networks-897dd3cb1468
1•teleforce•33m ago•0 comments

Show HN: Glyph a blockchain where the proof-of-work is neural network inference

https://github.com/raphaelwkago69-create/GLYPH
1•w4mwati•34m ago•0 comments

The cancer Alzheimer's disease paradox

https://www.nature.com/articles/s41514-026-00442-1
2•AFF87•36m ago•0 comments

NHS to use AI on its app to direct patients to appropriate services

https://www.theguardian.com/society/2026/jul/04/nhs-ai-app-patients-appropriate-services-health
1•Brajeshwar•37m ago•0 comments

Stories from Physics

https://spark.iop.org/stories-physics
1•the-mitr•38m ago•0 comments

Harbor: An MCP gateway that connects AI clients to back end APIs via tools

https://github.com/vijaydeepsinha/harbor
1•r0rshrk•38m ago•1 comments

Grade any site's HTTP signing-key directory

https://sitedex.dev/tools/keycheck?site=chatgpt.com
2•zeppelin_7•39m ago•0 comments

Applied XML Developers Conference (2004)

https://sellsbrothers.com/public/conference/oldindex9.htm
1•theanonymousone•43m ago•0 comments

Do Wavy Walls Use Fewer Bricks? I Tested It in Blender

https://blog.tymscar.com/posts/crinklecranklewalls/
2•birdculture•44m ago•0 comments