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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•11mo 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!

Seed3D 2.0

https://seed.bytedance.com/en/seed3d_2_0
1•pella•34s ago•0 comments

Why software fundamentals matter more than ever [video]

https://www.youtube.com/watch?v=v4F1gFy-hqg
1•zingar•2m ago•0 comments

The global edtech boom is fading as investors look elsewhere

https://restofworld.org/2026/edtech-funding-collapse-k12-startups-ai-workforce/
1•thm•2m ago•0 comments

Removal of Microplastics from Drinking Water by Moringa Oleifera Seed

https://pubs.acs.org/doi/10.1021/acsomega.5c11569
1•fodmap•3m ago•0 comments

AI Agent Designs a RISC-V CPU Core from Scratch

https://spectrum.ieee.org/ai-chip-design
1•pseudolus•7m ago•0 comments

Facts versus Understanding

https://www.solipsys.co.uk/ZimExpt/FactsVersusUnderstanding.html?zd24hn
1•ColinWright•7m ago•0 comments

US accuses China of "industrial-scale" AI theft. China says it's "slander"

https://arstechnica.com/tech-policy/2026/04/us-accuses-china-of-industrial-scale-ai-theft-china-s...
2•jnord•10m ago•0 comments

Electrostatics and High Voltage Links

http://amasci.com/static/electrostatic1.html
1•ludicrousdispla•13m ago•0 comments

Cohere and Aleph Alpha Merger

https://www.nytimes.com/2026/04/24/business/cohere-aleph-alpha-ai-merger.html
2•warthog•13m ago•0 comments

Spectro – macOS app to detect fake lossless audio files

https://www.getspectro.app
2•ddtcx•18m ago•0 comments

How Much Information Does Adding Noise Remove?

https://www.testingbranch.com/information_loss_and_noise/
1•mpcsb•27m ago•0 comments

WiFi Monitor for macOS

https://github.com/tenox7/wifimon
1•tenox•30m ago•0 comments

Show HN: My New Projects Website

https://apps.weichart.de
2•surrTurr•34m ago•1 comments

C64 Bass Guitar – Cool to Be Square Wave? (2012) [video]

https://www.youtube.com/watch?v=_kDhpFaf4EY
1•breve•35m ago•0 comments

Fast16: High-Precision Software Sabotage 5 Years Before Stuxnet

https://www.sentinelone.com/labs/fast16-mystery-shadowbrokers-reference-reveals-high-precision-so...
1•ledoge•35m ago•0 comments

Thermoacoustic heat pumps on the verge of commercial breakthrough

https://www.pv-magazine.com/2026/04/23/thermoacoustic-heat-pumps-on-the-verge-of-commercial-break...
2•ablation•37m ago•0 comments

Ask HN: Is Elon Musk Overrated?

2•wasimsk•37m ago•1 comments

RAG pipelines, leaking PII into vector databases and nobody's talking about it

https://comply-tech.co.uk/blog/rag-pipeline-pii-vector-embeddings.html
1•ComplyTechAPI•38m ago•0 comments

I built a kinetic reading engine to eliminate "page fright"

https://kin-txt.com/
3•pauljrad•39m ago•0 comments

My IKEA clock and software design

https://stitcher.io/blog/my-ikea-clock
2•brentroose•40m ago•0 comments

Got the Rust dream job, then AI happened

https://old.reddit.com/r/rust/comments/1stj607/got_the_rust_dream_job_then_ai_happened/
3•mellosouls•42m ago•0 comments

S. Korea police arrest man over AI image of runaway wolf that misled authorities

https://www.bbc.com/news/articles/c4gx1n0dl9no
15•giuliomagnifico•42m ago•2 comments

The Authentication Layer

https://stylman.substack.com/p/the-authentication-layer
1•hosteur•45m ago•0 comments

Analysis and Design of Developable Surfaces for Shipbuilding(1988) [pdf]

https://apps.dtic.mil/sti/tr/pdf/ADA327058.pdf
1•nill0•50m ago•0 comments

Recommender Systems Need the Tobacco Treatment

https://klemenvodopivec.substack.com/p/recommender-systems-need-the-tobacco
1•sunandsurf•53m ago•0 comments

Welcome to Gas City

https://steve-yegge.medium.com/welcome-to-gas-city-57f564bb3607
4•taheris•55m ago•0 comments

Vmsandbox.net: Wire up networks of Linux VMs in the browser

https://vmsandbox.net/
1•x3y1•56m ago•1 comments

GitHub Actions Key, but Resources Allocated to Other Areas

https://github.com/cli/cli/issues/5416
1•birdculture•58m ago•0 comments

Shibuya – Haskell Data Pipelines

https://github.com/shinzui/shibuya
2•Vosporos•58m ago•0 comments

DDD – Data Display Debugger

https://www.gnu.org/software/ddd/
2•mpweiher•1h ago•0 comments