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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!

Binance set to lose permission to operate in Europe

https://www.reuters.com/business/finance/binance-set-lose-eu-licence-bid-permission-offer-service...
1•darktoto•2m ago•0 comments

Squidbleed

https://blog.calif.io/p/squidbleed-cve-2026-47729
1•Tomte•4m ago•0 comments

SpaceX Shares Poised to Fall Again as US Market Reopens

https://www.bloomberg.com/news/articles/2026-06-22/spacex-shares-poised-to-slide-again-as-us-mark...
1•johnbarron•4m ago•0 comments

How to Fix Bay Area Transit [pdf]

https://ti.org/pdfs/BayAreaTransit.pdf
1•xnx•6m ago•0 comments

Show HN: Lockin – system-level distraction blocker controlled via text

https://www.lockinmcp.com
1•Kiog-Aser•6m ago•0 comments

I Shot Films for 30 Years. Now I'm Building Safety Systems for AI Agents

https://maref.org/blog/from-steadicam-to-agent-governance
1•Athena-maref•8m ago•0 comments

Resolving Uncertainty: A Unified Overview of Rabbinic Methods [pdf]

https://u.cs.biu.ac.il/~koppel/rov-25.5.pdf
2•FergusArgyll•9m ago•0 comments

When Diets Don't Work: Parents Turn to Wegovy for Elementary School Kids

https://www.wsj.com/health/wellness/when-diets-dont-work-parents-turn-to-wegovy-for-elementary-sc...
1•JumpCrisscross•9m ago•0 comments

Show HN: Bowora – A launchpad for build-in-public founders

https://bowora.com
1•Nimaaksoy•13m ago•0 comments

Show HN: Appareo – For when you know what you want to say but can't write it

https://www.appareo.ink/
2•ShaunakInamdar•14m ago•0 comments

You Have the Pieces. Now Build It

https://www.theidentityunderground.com/post/you-already-have-the-pieces-now-build-it
1•mooreds•15m ago•0 comments

Instagram sued over illegal gambling ads in the Nederland

https://nltimes.nl/2026/06/22/instagram-sued-illegal-gambling-ads-featuring-virgil-van-dijk-ronaldo
2•giuliomagnifico•16m ago•0 comments

Llama-dash – One go-to control plane for local inference

https://llama-dash.dev
1•ndom91•17m ago•1 comments

The Things We Share

https://codeplusconduct.substack.com/p/the-things-we-share
1•mooreds•18m ago•0 comments

How Accurate Is Professor Jiang?

https://predictivehistory.com/prediction-tracker/
2•mooreds•19m ago•1 comments

Any Sufficiently Large Lookup Table Must Be Conscious

https://julianrdcosta.substack.com/p/any-realizable-implementation-of
1•Anon84•21m ago•0 comments

Alan Greenspan, former chairman of the Fed, dies at age 100

https://www.cnbc.com/2026/06/22/alan-greenspan-former-chairman-of-the-fed-dies-at-age-100.html
3•jacquesm•21m ago•0 comments

Show HN: Nigel – A web-based assistant to navigate and alter Wikipedia

https://codingbutler.webfuse.com/
2•Salomeko•22m ago•0 comments

Nexus – AI teams that attack your business plan until weak assumptions collapse

https://nexussim.ai/
3•youngyankee•23m ago•0 comments

Meta to Address Low Employee Morale With Snacks

https://mashable.com/tech/meta-facebook-morale-employee-perks
2•dccoolgai•24m ago•0 comments

Show HN: Ze.sh – a z.sh-derived directory jumper that uses an event clock

https://github.com/jghub/ze
2•jghub•25m ago•0 comments

Ask HN: Can someone help me find HN post about 00s console emulation?

1•NooneAtAll3•25m ago•0 comments

81920 Cores per Rack with AMD EPYC Venice at HPE Discover 2026 – ServeTheHome

https://www.servethehome.com/81920-cores-per-rack-with-amd-epyc-venice-at-hpe-discover-2026/
1•rbanffy•26m ago•0 comments

Show HN: Zangetsu – a node-based media generation workspace

https://twitter.com/brsy_10/status/2069000671404376273
1•briheet•26m ago•0 comments

Google's Secret Warrant Fight over DOJ Pipe Bomb Probe Revealed

https://www.bloomberg.com/news/articles/2026-06-18/google-s-secret-warrant-fight-over-doj-pipe-bo...
2•helsinkiandrew•30m ago•0 comments

Alan Greenspan Dies at 100; Led Fed During Boom Before 2008 Bust

https://www.bloomberg.com/news/articles/2026-06-22/alan-greenspan-dies-at-100-led-fed-during-boom...
4•helsinkiandrew•32m ago•0 comments

The Magnetic Resonator Piano: EM-augmented acoustic grand piano [video]

https://www.youtube.com/watch?v=ed6pSAxVEts
1•junon•33m ago•0 comments

OctaMem: Auditable memory for AI agents, no vector DB to run

https://octamem.com
1•Mossiah•33m ago•0 comments

Apple Price Increases, Apple Intelligence and the E.U

https://stratechery.com/2026/apple-price-increases-apple-intelligence-and-the-e-u/
1•swolpers•38m ago•0 comments

SpaceX handed lowest possible ESG rating by MSCI

https://www.ft.com/content/a0dd4ea7-ef3d-4460-a96c-8c6975a053e3
2•johnbarron•40m ago•1 comments