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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!

Programmed to Kill/Satanic Cover-Up

https://www.programmedtokill.net
1•clanky•26s ago•0 comments

Show HN: MCP Server for Job Search

https://github.com/jobswithgpt/mcp
1•sp1982•28s ago•0 comments

Claude Code and the Shift

https://pikseladam.com/10-01-2026-claude-code-and-the-shift/
1•pikseladam•2m ago•0 comments

Show HN: Neuro+ GBrain

https://www.neuroplusgbrain.net/
1•FDX2018•8m ago•0 comments

The Finders Cult: Never Before Seen 1987 News Broadcasts [video]

https://www.youtube.com/watch?v=dhs-pQIXKk4
1•clanky•8m ago•0 comments

Show HN: Mac OS 8.1 Running on an ESP32-P4 Dev Board

https://github.com/amcchord/M5Tab-Macintosh
1•mcwiggin2•13m ago•0 comments

Dedoimedo's Greatest Sites on the Internet

https://www.dedoimedo.com/greatest_sites.html
1•dxs•14m ago•0 comments

The secret mission to fly a president's body back home – pilot speaks to the BBC

https://www.bbc.com/news/articles/c5y2v2p3nl8o
1•hahahahhaah•16m ago•0 comments

Qwen3 Vision Language Embedding Model

https://github.com/QwenLM/Qwen3-VL-Embedding
2•denimboy•16m ago•1 comments

Global AI computing capacity is doubling every 7 months

https://epoch.ai/data-insights/ai-chip-production
2•delichon•17m ago•0 comments

Universal AI Agent Subscription

https://twitter.com/firmwareai/status/2009735769867571459
1•cgilly2fast•18m ago•1 comments

Bulk rename files by pasting Excel data (client-side)

1•Salmannaseem•18m ago•0 comments

Ask HN: Who's running local AI workstations in 2026?

2•Blue_Cosma•18m ago•2 comments

Lemon Slice nabs $10.5M from YC and Matrix to build out its digital avatar tech

https://techcrunch.com/2025/12/23/lemon-slice-nabs-10-5m-from-yc-and-matrix-to-build-out-its-digi...
1•PaulHoule•19m ago•0 comments

Betterment Hacked

https://twitter.com/usdshitcoin/status/2009761135457599766
1•chardigio•20m ago•0 comments

Betterment Users Receive Suspicous Crypto Investment Push Notifcation

https://www.reddit.com/r/betterment/s/yfueybW3ZZ
2•rickcarlino•21m ago•0 comments

Vendor Locked CPUs, Restricting and Securing Hardware

https://cloudninjas.com/blogs/news/vendor-locked-cpus-restricting-and-securing-hardware
1•tanelpoder•21m ago•0 comments

Jujutsu v0.37.0 Released

https://github.com/jj-vcs/jj/releases/tag/v0.37.0
1•birdculture•22m ago•0 comments

Box64 vs. FEX Emulation Performance on ARM Cortex-A53

https://printserver.ink/blog/box64-vs-fex/
1•ValdikSS•22m ago•0 comments

SpeedyEDA – One-Line Data Exploration for Developers and Data Scientists

https://pypi.org/project/speedyeda/
1•dawitworku•22m ago•1 comments

Betterment Hacked by Crypto Scam

https://bsky.app/profile/ericrie.se/post/3mbzlov44sc23
5•EricRiese•27m ago•1 comments

Every Developer Abandoned This Product in 3 Minutes

https://tessakriesel.com/every-developer-abandoned-this-product-in-3-minutes/
2•mooreds•28m ago•1 comments

Apartments to be built above Costco's

https://www.entrepreneur.com/business-news/hundreds-of-apartments-are-being-built-on-top-of-a-cos...
2•nateb2022•28m ago•0 comments

Collection and Use of Biometrics by U.S. Citizenship and Immigration Services

https://www.federalregister.gov/documents/2025/11/03/2025-19747/collection-and-use-of-biometrics-...
3•hentrep•33m ago•0 comments

Tell HN: Increased Number of Incidents on GitHub Between Nov 2025 and Jan 2026

https://www.githubstatus.com/history
1•stefankuehnel•33m ago•0 comments

PoC Wayland compositor rendering graphics into terminal

https://github.com/pshirshov/brain-damage
2•pshirshov•35m ago•1 comments

AI solves Erdos problem #728 (Terence Tao mathstodon post)

https://mathstodon.xyz/@tao/115855840223258103
12•cod1r•44m ago•0 comments

U.S. Hiring Turned Sluggish over First Year of Trump's Second Term

https://www.nytimes.com/2026/01/09/us/politics/us-hiring-economy-trump-second-term.html
8•duxup•44m ago•1 comments

Building a Raytracer from Scratch in Go

https://github.com/ikarishinji9/riot
1•ikarishinji9•44m ago•0 comments

Stored Procedures Considered Harmful

https://pouyamiri.com/blog/stored-procedures-considered-harmful
2•p0u4a•45m ago•1 comments