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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!

AI CLI that fixes broken dev tool installs

https://murderszn.github.io/sprout/
1•murderszn•2m ago•0 comments

Record-breaking solo rower Kelsey Pfendler arrives in Hawaii

https://www.hawaiinewsnow.com/2026/07/04/record-breaking-solo-rower-kelsey-pfendler-arrives-hawaii/
1•MaysonL•5m ago•0 comments

Show HN: Two-tier-memory – queryable long-term memory for AI coding agents

https://github.com/tadelstein9/two-tier-memory
1•tadelstein•6m ago•0 comments

Ubuntu 24.04 on Intel Mac

https://github.com/mozekin/apple-bce-drv/blob/aur/INSTALL-UBUNTU.md
2•mozzinator•11m ago•0 comments

Review Frontloading: Do You Love This App? Y/N

https://functionmouse.com/frontloading/
2•functionmouse•16m ago•0 comments

Bugs happen: The easy way to compare solo PQ to ECC+PQ

https://blog.cr.yp.to/20260704-bugs.html
2•zdw•31m ago•0 comments

If I designed a Commodore Phone

https://retrogamecoders.com/if-i-designed-a-commodore-phone/
3•ibobev•38m ago•0 comments

Egg consumption inversely correlated with Alzheimer's

https://pubmed.ncbi.nlm.nih.gov/42002260/
14•natbennett•40m ago•2 comments

My side quest measuring input latency with VK_EXT_present_timing

https://themaister.net/blog/2026/07/02/my-side-quest-measuring-input-latency-with-vk_ext_present_...
2•ibobev•44m ago•0 comments

Spritework on the ZX Spectrum: Rendering

https://bumbershootsoft.wordpress.com/2026/07/04/spritework-on-the-zx-spectrum-rendering/
2•ibobev•45m ago•0 comments

Benzo(a)pyrene

https://en.wikipedia.org/wiki/Benzo(a)pyrene
3•libpcap•45m ago•0 comments

Trying to buy a sandwich with HTTP 402

https://andrewacomb.substack.com/p/trying-to-buy-a-sandwich-with-http
3•acombandrew•45m ago•1 comments

Returning to Zig

https://gracefulliberty.com/articles/return-to-zig/
6•birdculture•50m ago•0 comments

CATL is building more than 200 battery swap stations every month

https://electrek.co/2026/07/04/catl-is-building-more-than-200-battery-swap-stations-every-month/
3•breve•55m ago•0 comments

French Police Dismantle Operation Behind the Defunct YggTorrent

https://torrentfreak.com/french-police-dismantle-operation-behind-the-already-defunct-yggtorrent/
2•gslin•56m ago•0 comments

Morph Reflexes

https://docs.morphllm.com/sdk/components/reflexes
3•handfuloflight•59m ago•0 comments

Return of the Nigerian Prince Redux: Beware Book Club and Book Review Scams

https://writerbeware.blog/2025/09/19/return-of-the-nigerian-prince-redux-beware-book-club-and-boo...
8•Anon84•1h ago•4 comments

Infographic – An Infographic Generation and Rendering Framework

https://infographic.antv.vision/
3•javatuts•1h ago•0 comments

Vibe Coded X11 Server Written in Rust Adds Xinerama, FreeBSD Support

https://www.phoronix.com/news/YSERVER-1.3-Released
2•breve•1h ago•0 comments

The Declaration of Independence

https://acoup.blog/2026/07/04/collections-on-the-declaration-of-independence/
3•colonCapitalDee•1h ago•0 comments

Obsidian AI Setup – Bootstrap a Personalized Obsidian Vault with AI

https://github.com/anliberant/obsidian-ai-setup
2•javatuts•1h ago•0 comments

Reticulum Is Interesting

https://bergie.iki.fi/blog/reticulum-is-interesting/
4•bergie•1h ago•0 comments

Costco's growing cool factor attracts younger audiences

https://www.seattletimes.com/business/costcos-growing-cool-factor-attracts-younger-audiences/
5•TMWNN•1h ago•0 comments

The goal isn't to build "another AI IDE."

https://github.com/BotCoder254/limboo
2•telvin_Teum•1h ago•0 comments

Mama Look a White Dove

https://extelligence.substack.com/p/mama-look-a-white-dove
7•Aloha•1h ago•0 comments

Damo Academy unveils an AI agent able to discover superconductors

https://www.scmp.com/tech/big-tech/article/3359335/alibabas-elements-claw-ai-agent-unearths-four-...
4•yogthos•1h ago•0 comments

India's largest eVTOL demonstrator completes flight tests

https://newatlas.com/aircraft/india-evtol-demonstrator-sarla-aviation-sylla-shunya/
3•breve•1h ago•0 comments

Nvidia Has Become the Bank Behind the AI Boom

https://startupfortune.com/nvidia-has-quietly-become-the-bank-behind-the-ai-boom/
5•insanetechh•1h ago•0 comments

Tier-aware data federation between Postgres and Apache Iceberg

https://github.com/Modak-Labs/modak
2•addu390•1h ago•0 comments

Zo Computer

https://www.zo.computer
8•erhuve•1h ago•5 comments