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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•8mo 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!

Agency Costs of Overvalued Equity

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=480421
1•gradus_ad•59s ago•0 comments

Panamanian Court Strikes Down Hong Kong Firm's Canal Contract

https://www.nytimes.com/2026/01/30/business/panama-canal-ck-hutchison.html
3•JumpCrisscross•3m ago•1 comments

Lost in the Middle: How Language Models Use Long Contexts (2023)

https://arxiv.org/abs/2307.03172
2•wslh•4m ago•0 comments

The cautionary tale of Yoon Suk Yeol and the 'abuse of power'

https://www.japantimes.co.jp/commentary/2026/01/19/world/yoon-suk-yeol-and-power-abuse/
2•PaulHoule•4m ago•0 comments

Elon Musk's brain chip feels magical, says paralysed Briton

https://www.thetimes.com/uk/science/article/elon-musk-brain-chip-british-patiant-j52ps0kz8
1•bookofjoe•5m ago•2 comments

What Happened at the OpenSSL Conference 2025

https://www.i-programmer.info/news/99-professional/18630-what-happened-at-the-openssl-conference-...
1•aquastorm•6m ago•0 comments

Ask Your Cryptographer If Context-Committing AEAD Is Right for You

https://iacr.org/cryptodb//data/paper.php?pubkey=35476
1•u1hcw9nx•6m ago•0 comments

CaaS – Cat as a Service

https://cataas.com/
1•cat-whisperer•7m ago•0 comments

Jack Kerouac's 37 metre-long, first draft scroll of On the Road to be auctioned

https://www.theguardian.com/books/2026/jan/30/jack-kerouac-on-the-road-first-draft-scroll-to-be-a...
2•mitchbob•7m ago•0 comments

Show HN: GeoEchoes – AR App for Permanent Geo Memories on Arweave with H3 Grids

https://wandern.space/hn
1•Rudoam•9m ago•0 comments

How to promote Multi-AI collaboration platform? Need advices in comments please

https://github.com/KeaBase/kea-research
1•Stanislaw_•10m ago•0 comments

Washington Post Raid Is a Frightening Reminder: Turn Off Your Phone's Biometrics

https://theintercept.com/2026/01/30/washington-post-hannah-natanson-fbi-biometrics-unlock-phone/
4•qingcharles•10m ago•0 comments

Amazon layoffs are part of turning the company into the largest startup

https://www.businessinsider.com/amazon-layoffs-leaked-memos-job-cuts-startup-2026-1
2•surgical_fire•11m ago•1 comments

A Plan to Restore Trust in Science from a 'Fringe Epidemiologist'

https://www.nytimes.com/2026/01/29/opinion/jay-bhattacharya-public-health-covid-trust.html
1•whack•11m ago•0 comments

Automate a Full-Stack, Multi-Environment Deployment Pipeline with GitHub Actions

https://magill.dev/post/automating-a-full-stack-multi-environment-deployment-pipeline
1•andymagill•13m ago•0 comments

Epstein: Gates caught STD from trafficked girls, discussed medicating Melinda

https://twitter.com/Furbeti/status/2017284599953428654/photo/1
5•wahnfrieden•15m ago•1 comments

Sidequest

https://github.com/JustakCZ/Sidequest
1•Justakcz•15m ago•0 comments

Book of Verse

https://verselang.github.io/book/
1•pizlonator•15m ago•0 comments

Why profitable companies still fail: cash timing, not margins

1•dispelda•16m ago•0 comments

What Is an LRAD, and Why People Are Asking Us About It

https://blog.adafruit.com/2026/01/30/what-is-an-lrad-and-why-people-are-asking-us-about-it/
1•ptorrone•16m ago•0 comments

Euro firms must ditch Uncle Sam's clouds and go EU-native

https://www.theregister.com/2026/01/30/euro_firms_must_ditch_us/
1•CrankyBear•17m ago•0 comments

Can AI Learn Its Own Rules? We Tested It

https://shablag.substack.com/p/can-ai-learn-its-own-rules-we-tested
2•eluusive•17m ago•1 comments

Notification Underload

https://zuma9pt5.com/notification-underload/
1•todsacerdoti•17m ago•0 comments

The Metamorphosis of Prime Intellect

https://en.wikipedia.org/wiki/The_Metamorphosis_of_Prime_Intellect
1•sowbug•20m ago•0 comments

Learn Lean (Lang for Math Proof) from a Programmer's Perspective

https://www.dataisland.org/blog/lean-1.html
2•dataisland99•22m ago•0 comments

UK's first rapid-charging battery train ready for boarding this weekend

https://www.theguardian.com/business/2026/jan/30/uk-first-rapid-charging-battery-train
2•MBCook•23m ago•0 comments

Apple Faces AI Talent Exodus as Top Siri Leader Joins Google DeepMind

https://www.bloomberg.com/news/articles/2026-01-30/apple-loses-more-ai-researchers-and-a-siri-exe...
2•coloneltcb•23m ago•1 comments

Practical Strategies for Optimizing Gemini API Calls

https://irwinbilling.com/optimizing-gemini-api-calls/
1•niwri•24m ago•0 comments

I Gave Claude a Body [video]

https://www.youtube.com/watch?v=jBpQiv-ZlVM
1•freediver•24m ago•0 comments

Cholinergic modulation of dopamine release drives effortful behaviour

https://www.nature.com/articles/s41586-025-10046-6
1•XzetaU8•24m ago•0 comments