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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!

Simplifying Two Millennium Prize Problems

https://metamagic.substack.com/p/simplifying-two-millennium-prize
1•r0ze-at-hn•1m ago•0 comments

FB >> HTTPS://Www.facebook.com/JetterixPressureNozzleUnitedKingdom/

https://www.facebook.com/JetterixPressureNozzleUnitedKingdom
1•natashawonk•3m ago•0 comments

AI images are being used in insurance scams

https://www.bbc.com/news/articles/cm2rr9pg4jzo
1•1659447091•6m ago•0 comments

Prism License Framework (a modular license generator)

1•Scientific_AJ•9m ago•0 comments

Rust Maintainer Fund

https://nlnet.nl/maintainers/rust/
1•pabs3•10m ago•0 comments

Netflix Cofounder Reed Hastings Is Leaving the Company

https://www.businessinsider.com/netflix-cofounder-reed-hastings-is-leaving-the-company-sarandos-p...
2•doppp•11m ago•0 comments

Prism License Framework (a modular license generator)

https://www.google.com/search?q=https://github.com/ScientificAJ/prism-license-framework
1•Scientific_AJ•11m ago•0 comments

Show HN: Viche – OSS private registry for agent communication

https://github.com/viche-ai/viche
1•nanojoel•12m ago•0 comments

Approve agents and track progress while you're on the go

https://github.com/grainulation/farmer
3•woptober•15m ago•0 comments

Treating enterprise AI as an operating layer

https://www.technologyreview.com/2026/04/16/1135554/treating-enterprise-ai-as-an-operating-layer/
1•joozio•15m ago•0 comments

Show HN: CrossTrack – Cross-platform identity resolution as a service

2•jamespeng•18m ago•0 comments

Ask HN: What are the machine requirements for a LLM like Llama-3.1-8B?

2•wasimsk•22m ago•0 comments

Reed Hastings to step down from Netflix board

https://www.theguardian.com/media/2026/apr/16/netflix-chair-reed-hastings
2•abawany•23m ago•0 comments

Single Stage Rocket Technology (SSRT) Delta Clipper Experimental (DC-X)(1993) [video]

https://www.youtube.com/watch?v=J6ZyDSmC-d0
1•o4c•26m ago•0 comments

Engram – context spine for AI coding agents, 88% proven token savings

https://github.com/NickCirv/engram
1•NickCirv•26m ago•0 comments

Deleteduser.com – A $15 PII Magnet

https://mike-sheward.medium.com/deleteduser-com-a-15-pii-magnet-c4396eb21061
2•p4bl0•31m ago•2 comments

MongoDB Compass Alternative

https://visualeaf.com/blog/visualeaf-as-mongodb-compass-alternative/
1•RoxiHaidi•33m ago•0 comments

I'm tired about hearing about AI startups

1•geuis•39m ago•2 comments

Observational constraints project a ~50% AMOC weakening by end of this century

https://www.science.org/doi/10.1126/sciadv.adx4298#sec-3
2•Kaibeezy•40m ago•1 comments

Drivers sue San Jose over nearly 500 police cameras used to track drivers

https://www.nbcnews.com/tech/tech-news/san-jose-drivers-sue-city-police-flock-cameras-rcna331750
4•blessedwhiskers•42m ago•0 comments

IETF: Meow

https://www.ietf.org/archive/id/draft-meow-mrrp-00.html
4•michaelsshaw•45m ago•1 comments

Dog Bed Database

https://aosabook.org/en/500L/dbdb-dog-bed-database.html
3•tosh•46m ago•0 comments

Why is the unit of measure placed before the value for currencies? (2016)

https://english.stackexchange.com/questions/34013/why-is-the-unit-of-measure-placed-before-the-va...
2•fittingopposite•46m ago•1 comments

'Middle Class' Actors Are Getting 'Squeezed Out' of Hollywood

https://variety.com/2026/tv/news/kirk-acevedo-sold-house-middle-class-actors-hollywood-1236722809/
5•Michelangelo11•47m ago•1 comments

House punts on FISA, extends spy powers program for two weeks

https://www.politico.com/news/2026/04/17/spy-powers-expiration-closes-in-as-house-procedural-vote...
1•Cider9986•47m ago•0 comments

A Stunning New Verdict Rewrites the Rules of Corporate Morality

https://www.nytimes.com/2026/04/17/opinion/a-stunning-new-verdict-rewrites-the-rules-of-corporate...
1•mitchbob•48m ago•3 comments

First bikebell against noise-canceling headphones

https://www.welovecycling.com/wide/duobell/
10•mccolly•50m ago•2 comments

Intel Core Ultra 7 270K Plus Performance in 340 Linux Benchmarks Review

https://www.phoronix.com/review/intel-core-ultra-7-270k-plus
2•rbanffy•50m ago•0 comments

How Secure Is Tap to Pay? [Veritasium] [video]

https://www.youtube.com/watch?v=PPJ6NJkmDAo
2•mfrw•51m ago•0 comments

For Enterprises, GPUs Need Virtualization as Much as CPUs Ever Did

https://www.nextplatform.com/control/2026/04/10/for-enterprises-gpus-need-virtualization-as-much-...
1•rbanffy•55m ago•0 comments