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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!

Garry Tan says turning down early offer to join Palantir a $2-4B 'mistake'

https://www.businessinsider.com/garry-tan-turning-down-palantir-billion-mistake-2026-8
1•muzz•1m ago•0 comments

SF exempted 1900 parcels from a housing law. YIMBYs are suing city to reverse it

https://www.sfchronicle.com/sf/article/sf-housing-yimby-lawsuit-sb79-22385659.php
1•littlexsparkee•2m ago•0 comments

CalPrivacy 2nd Fine in As Many Days Against a data broker

https://captaincompliance.com/news/calprivacy-hits-second-data-broker-in-days-cybba-fined-52400-f...
1•richartruddie•2m ago•1 comments

One Hundred Reasons to Be a Scientist [pdf]

http://web.archive.org/web/20090115212435/http://users.ictp.it/~pub_off/books/100_reasons.pdf
1•joebig•5m ago•0 comments

Show HN: Hearth – a shared family workspace where an agent can build apps

1•jmtulloss•7m ago•0 comments

Classic: How hard can it be?

https://pastila.org/essays/classic-gradient-interpolation/
1•jjgreen•8m ago•0 comments

Mistral AI Strategy

https://venturebeat.com/infrastructure/mistral-ai-wants-to-build-1-gigawatt-of-european-compute-b...
1•PhilipVinc•9m ago•1 comments

Apache Fory JSON: Fast JSON Serialization for Java

https://fory.apache.org/blog/fory_json_fastest_java_json_framework/
1•mooreds•9m ago•0 comments

Claude First Customer Finder

https://github.com/leo-proger/claude-first-customer-finder-skill
1•leo_proger•10m ago•0 comments

Namecheap is down due to DC cooling failure

https://www.engadget.com/2236616/hosting-provider-namecheap-is-down-after-data-center-cooling-fai...
1•nvahalik•12m ago•0 comments

Reachpad now includes free Gemma 4 31B and Gemini 3.6 Flash

https://reachpad.dev/blog/free-models
1•sakuraiben•14m ago•0 comments

Signal and noise – Compact Disc microscopy

http://www.pmonta.com/compact-disc-microscopy.html
1•Eridanus2•14m ago•0 comments

In Nepal's 'Kidney Valley' poverty drives illegal market for human organs (2023)

https://www.pbs.org/newshour/world/in-nepals-kidney-valley-poverty-drives-an-illegal-market-for-h...
1•bookofjoe•15m ago•0 comments

Zapping Rocks Unlocks Stimulated Geologic Hydrogen

https://spectrum.ieee.org/stimulated-geologic-hydrogen
1•rbanffy•16m ago•0 comments

Trump Orders Navy to Restore [Steam Catapults] in Aircraft Carriers

https://www.wsj.com/us-news/trump-orders-navy-to-restore-old-technology-in-aircraft-carriers-cost...
1•dctoedt•16m ago•0 comments

Moderate wine drinkers had a 21% lower risk of cardiovascular death

https://www.sciencedaily.com/releases/2026/08/260808235008.htm
1•dreadsword•17m ago•1 comments

The official DeepSeek-Harness tested with jelly ball [video]

https://www.youtube.com/watch?v=hNcqNIFl9GA
1•grigio•18m ago•0 comments

New York's Congressional Delegation – Track Aipac

https://www.trackaipac.com/states/newyork
1•untiledsource•20m ago•0 comments

So Long, and No Thanks for the Externalities (2009) [pdf]

https://www.microsoft.com/en-us/research/wp-content/uploads/2016/10/SoLongAndNoThanks.pdf
1•csmeyer•24m ago•0 comments

Understanding WAL Backpressure in Postgres

https://clickhouse.com/blog/wal-backpressure-clickhouse-managed-postgres
1•saisrirampur•27m ago•0 comments

AI Mania Is Eviscerating Global Decision-Making

https://ludic.mataroa.blog/blog/ai-mania-is-eviscerating-global-decision-making/#fnref:7
2•pavel_lishin•27m ago•0 comments

Terabytes of credentials leaked in supply-chain attack

https://arstechnica.com/security/2026/08/terabytes-of-credentials-leaked-in-massive-supply-chain-...
7•RattlesnakeJake•27m ago•0 comments

All You Need to Know about JEPA

https://www.overshoot.ai/blogs/all-you-need-to-know-about-jepa
2•JosephScharpf10•27m ago•0 comments

Killing Reticulum to Save It

https://leviculum.network/posts/killing-reticulum-to-save-it
1•rihegher•28m ago•0 comments

On Loyalty to Your Employer (2018)

https://medium.com/hackernoon/on-loyalty-to-your-employer-c674c4b06b3a
2•downbad_•30m ago•0 comments

Caged Code – Vanilla Claude Code Binary in a Webpage

https://tomlarkworthy.github.io/lopebooks/notebooks/Caged_Code.html
1•tlarkworthy•31m ago•0 comments

Show HN: I built a multi-step API testing tool that's designed to be self-hosted

https://github.com/test-fleet/control-server
1•raghiba1124•32m ago•0 comments

China's renewable boom masks a quiet Coal-to-Liquids expansion

https://oilprice.com/Energy/Coal/Chinas-Renewable-Boom-Masks-a-Quiet-Coal-to-Liquids-Expansion.html
2•leonidasrup•34m ago•3 comments

Oneiric – an open-source AI short film [video]

https://www.youtube.com/watch?v=aAg9iDh9_BQ
2•txrx0000•35m ago•0 comments

Overshoot: The World Is Hitting Point of No Return on Climate

https://e360.yale.edu/features/1.5-degrees-tipping-points
2•alephnerd•36m ago•0 comments