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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•11mo 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!

Why we create architecture diagrams (2022)

https://www.ilograph.com/blog/posts/why-create-system-architecture-diagrams/
1•billyp-rva•3m ago•0 comments

Show HN: A collaborative SSH copilot for on-calls/DevOps/MLOps

https://github.com/few-sh/fewshell
1•hexer303•3m ago•0 comments

Graphics: How the Strait of Hormuz closure affects global oil supply

https://www.reuters.com/graphics/IRAN-CRISIS/OIL-LNG/mopaokxlypa/
1•cybermango•3m ago•0 comments

Open source contribution and job search as matching markets under AI congestion

https://e10v.me/matching-markets-congestion/
1•e10v_me•3m ago•1 comments

Show HN: Open-source digital business card generator

https://github.com/kevinwielander/digital-business-cards
1•challengerVIE•6m ago•0 comments

The Complexity of Simplicity [video]

https://www.youtube.com/watch?v=Cum5uN2634o
1•tosh•8m ago•0 comments

Explore Khorinis Gothic2 in the Browser

https://rapid-queen-bf94.gothicviewer.workers.dev/
1•xkcd1963•12m ago•1 comments

Haskell library for non-deterministic pattern matching

https://github.com/egison/sweet-egison
1•danny00•12m ago•0 comments

Microsoft .NET on Linux Patches Use IO_uring for Performance Benefits

https://www.phoronix.com/news/Microsoft-dotNET-IO-uring
1•DeathArrow•14m ago•0 comments

Help LaunchChair with the Rank In Public startup competition with an up-vote

https://rankinpublic.xyz/vote/jn7dkedm0qv6q9evmh2nwb7azh84r109
1•jacobcounsell•15m ago•0 comments

Backblaze redefines 'unlimited' backups, not backing up Dropbox and OneDrive

https://www.tomshardware.com/software/cloud-storage/backblaze-redefines-unlimited-while-users-dis...
1•ValentineC•17m ago•0 comments

St. Olaf researchers built a computer that doesn't require electricity

https://wp.stolaf.edu/news/from-springs-and-bolts-st-olaf-researchers-built-a-computer-that-doesn...
1•wjSgoWPm5bWAhXB•20m ago•0 comments

Context Is Software, Weights Are Hardware

https://www.aravindjayendran.com/writing/context-is-not-learning
2•maxaravind•20m ago•1 comments

Palantir's Manifesto and Karp's Dissertation

https://xcancel.com/gothburz/status/2045633711299813488
3•doener•22m ago•0 comments

AI song tops iTunes global charts

https://www.dexerto.com/entertainment/ai-generated-song-takes-1-spot-on-itunes-global-charts-3353...
1•cybermango•23m ago•0 comments

Sugar: A Stimulant That Made the Modern World

https://worldhistory.substack.com/p/sugar-a-stimulant-that-made-the-modern-54e
1•crescit_eundo•25m ago•0 comments

Wandering Spleen Condition: Spleen migrating to different location in the body

https://radiopaedia.org/articles/wandering-spleenwanderingspleen
1•cybermango•26m ago•0 comments

AI vendors' response to security flaws: It wasn't me

https://www.theregister.com/2026/04/19/ai_vendors_response_to_security/
1•beardyw•26m ago•0 comments

Real-Time Visualization of Human Finger Joint Cavitation (2015)

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0119470
1•bookofjoe•27m ago•0 comments

HTMX 4.0: Hypermedia finds a new gear

https://www.infoworld.com/article/4150864/htmx-4-0-hypermedia-finds-a-new-gear.html
1•asplake•29m ago•0 comments

New HUDIMM memory specification debuts with goal of slashing DDR5 prices

https://www.tomshardware.com/pc-components/ddr5/new-hudimm-memory-specification-debuts-with-goal-...
1•giuliomagnifico•29m ago•0 comments

GitHub Reports DMCA Takedown Record and Surging Anti-Circumvention Claims

https://torrentfreak.com/github-reports-dmca-takedown-record-and-surging-anti-circumvention-claims/
1•Brajeshwar•31m ago•0 comments

Full algorithm chain I used to implement a sigma rules engine in Linux Kernel

https://cybereason-public.github.io/owLSM/architecture/rule-evaluation.html
1•SilverPlate3•34m ago•0 comments

Neo-Feudalism With Good UX – handful of AI companies became land we all work on

https://www.gailweiner.com/post/neo-feudalism-with-good-ux-how-a-handful-of-ai-companies-became-t...
1•bilsbie•38m ago•2 comments

Ultra-Processed Foods and Muscle Fat Infiltration at Thigh MRI

https://pubs.rsna.org/doi/10.1148/radiol.251129
1•bilsbie•39m ago•0 comments

Education research is weak and sloppy. Why?

https://www.theargumentmag.com/p/education-research-is-weak-and-sloppy
2•cebert•45m ago•0 comments

Show HN: Claude-codex-proxy – Use Claude Code with ChatGPT subscription

https://github.com/raine/claude-codex-proxy
6•rane•51m ago•0 comments

Atlassian's new data collection policy protects rich customers while AI eats

https://www.theregister.com/2026/04/18/atlassians_new_data_collection_policy/
2•latein•51m ago•0 comments

0: I built an app that creates AI real estate videos

https://www.tourestateai.com/en
1•jojomasala•52m ago•0 comments

Show HN: Donbar – A dead-simple way to design and send professional emails

https://www.donbar.org/
2•ShmuelT•53m ago•2 comments