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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!

Rare-Book Sales Are Booming. They're Getting Sliced Up and Fed to AI

https://www.wsj.com/articles/ais-need-for-content-has-put-rare-book-dealers-in-a-bind-1ac5a053
1•1vuio0pswjnm7•22s ago•0 comments

Formal Perf. and Compile Time Guarantees for Compiler Optimization Heuristics

https://arxiv.org/abs/2608.20137
1•matt_d•3m ago•0 comments

Show HN: A bilingual I Ching and BaZi reflection tool

https://eastern-divination.vercel.app
1•hdd-oliver•4m ago•0 comments

A historic El Nino is forming. Here's why scientists are worried [video]

https://www.youtube.com/watch?v=Dcl5Mn373Oc
1•ksec•8m ago•0 comments

Chinese Orgs Building AI Models of American Voters to Test Political Messages

https://twitter.com/nataliegwinters/status/2090814996687237570
2•daniel_iversen•12m ago•0 comments

Before-and-after images show where SpaceX rocket crashed into the moon

https://www.washingtonpost.com/technology/2026/08/19/nasa-images-show-spacex-crash-site-moon/
1•1vuio0pswjnm7•16m ago•0 comments

MailSift – Fast email and MX DNS validator Chrome extension

https://chromewebstore.google.com/detail/mailsift/aipolipnoajkejecehomimoglebbekdm
1•GriveDev•18m ago•0 comments

Fanpage dự án T&T Homes Elite Rivera – T&T Vĩnh Long

https://www.facebook.com/tteliterivera.officialpage
1•phuocphamrealty•19m ago•0 comments

Endangered Language

https://en.wikipedia.org/wiki/Endangered_language
1•Eridanus2•20m ago•0 comments

Crafted NTFS File-System Image Allows Root Access on Linux with NTFS3 Driver

https://www.phoronix.com/news/NTFS3-Vulnerability-For-Root
1•isodude•24m ago•0 comments

Level up your life by starting a side quest

https://www.npr.org/2026/08/19/nx-s1-5936241/feeling-restless-level-up-your-life-start-side-quest
1•andsoitis•25m ago•0 comments

Using Claude hosted agents to solve open source bugs and perf improvements

https://github.com/marketplace/jaipilot
2•surajkrajan•29m ago•1 comments

What Is Braille?

https://afb.org/blindness-and-low-vision/braille/what-braille
1•andsoitis•32m ago•0 comments

Vero: Can AI Agents Build Formally Verified Software Repositories?

https://vero.verina.io/
1•matt_d•32m ago•0 comments

DEF Con 19: Skunkworks: Daniel Beckwitt on Bitcoin in 2019 [video]

https://www.youtube.com/watch?v=Yj2blBX2iBw
1•nodesocket•34m ago•1 comments

Are You in Danger of Becoming a Robot?

https://nautil.us/are-you-in-danger-of-becoming-a-robot-1284114
1•Brajeshwar•34m ago•0 comments

Show HN: Live Sports

https://tipoffwatch.com/sports
1•buffer_overlord•35m ago•0 comments

Moonlander Ergonomic Keyboard

https://www.zsa.io/moonlander
1•andsoitis•40m ago•0 comments

The Hidden Pipeline Behind AI Search Visibility

https://medium.com/the-discovery-collective/the-hidden-pipeline-behind-ai-search-visibility-d4e9c...
1•rakeshmenon•40m ago•1 comments

Compile-Time Improvements in LLVM 23

https://aengelke.net/llvm23-ct.html
1•matt_d•41m ago•0 comments

AI's potential climate benefits outweighed by role in boosting fossil fuels

https://www.theguardian.com/technology/2026/aug/11/ai-will-do-more-to-boost-fossil-fuel-productio...
1•bryanrasmussen•41m ago•0 comments

While government reviews aged care algorithm, waitlists are growing

https://www.abc.net.au/news/2026-08-23/independent-assessment-tool-four-corners-mark-butler-aged-...
1•ahonhn•42m ago•0 comments

Drop_file_cache: Evict cached data for files/directories without root

https://github.com/shenwei356/drop_file_cache
1•shenwei356•45m ago•0 comments

Humanoid robots surpass human records in 100M, high jump

https://www.espn.com/olympics/story/_/id/49692320/humanoid-robots-surpass-human-records-100m-high...
2•geox•45m ago•1 comments

Who is the founder of 0x Alpha?

https://openrouter.ai
1•LYFMail•45m ago•0 comments

Show HN: Mokup – Backend not ready? Mock API responses in Chrome DevTools

https://chromewebstore.google.com/detail/mokup-mock-apis-in-devtoo/pemnjopjhbagogaojfgcfamailepnebb
1•pxdev•47m ago•0 comments

Quantum Mathematics for Modeling BioPhysics (including BioOS v2 software)

https://zenodo.org/records/22064550
1•GeometryKernel•48m ago•0 comments

Show HN: TDILEARNED – a rabbit-hole machine

https://til-seven.vercel.app/
1•mythiix•58m ago•0 comments

T&T Homes Elite Rivera

https://www.facebook.com/groups/ttvinhlong.chinhthuc/posts/1053828987263728/
1•phuocphamrealty•58m ago•0 comments

Andreessen Horowitz Focus of DOJ Probe over Board Directors

https://finance.yahoo.com/technology/ai/articles/andreessen-horowitz-focus-doj-probe-171350711.html
1•ah27182•1h ago•0 comments