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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!

Whole-body ultrasound captures full cross-sections in 10 seconds

https://medicalxpress.com/news/2026-04-body-ultrasound-captures-full-sections.html
2•PaulHoule•10m ago•0 comments

DeepSeek V4 Pro: The First Chinese Model at the Frontier

https://foodtruckbench.com/blog/deepseek-v4-pro
1•nnx•11m ago•0 comments

Show HN: Better Design – 28 Shadcn design systems (OSS, MCP: Cursor/Claude Code)

https://github.com/marvkr/better-design
2•marvinkr•13m ago•0 comments

The Physics Behind the Thumb on Hose Trick

https://practical.engineering/blog/2026/5/5/the-physics-behind-the-thumb-trick
3•sohkamyung•15m ago•0 comments

VECT: Ransomware by Design, Wiper by Accident

https://research.checkpoint.com/2026/vect-ransomware-by-design-wiper-by-accident/
1•gnabgib•15m ago•0 comments

Apache HTTP Server: HTTP2: double free and possible RCE on early reset

https://www.cve.org/CVERecord?id=CVE-2026-23918
1•IncandescentGas•16m ago•0 comments

We Analyzed 20 Most Common Fake WordPress Plugins. Here's What They Do

https://blog.imunify360.com/20-most-common-fake-wordpress-plugins
1•shaunpud•17m ago•0 comments

Izeria.com a website/app to discover spots and gamify visiting your local area

https://www.izeria.com/en
2•eltados•18m ago•3 comments

Human brain changes after first psilocybin use

https://www.nature.com/articles/s41467-026-71962-3
3•karma_daemon•22m ago•1 comments

Ubuntu Is Run by "N00bs" (and It Shows)

https://techrights.org/n/2026/05/05/Ubuntu_is_Run_by_N00bs_and_It_Shows.shtml
1•amcclure•23m ago•0 comments

How much of the scientific literature is generated by AI?

https://www.nature.com/articles/d41586-025-03504-8
1•warbaker•25m ago•0 comments

IronMap – Self-hosted fitness tracker with community gym equipment database

https://github.com/bhman792/ironmap
1•bhman79•25m ago•0 comments

An atmosphere around a tiny, icy world beyond Pluto

https://apnews.com/article/pluto-atmosphere-kuiper-belt-c6b0ec2e0631f47c25ce18479b14e1ed
3•tcp_handshaker•33m ago•0 comments

AI tools could enable bioterrorism

https://www.economist.com/science-and-technology/2026/05/05/how-ai-tools-could-enable-bioterrorism
4•pseudolus•33m ago•1 comments

AI Has America's Oldest Monopoly Problem – Part 1

https://easydays.substack.com/p/ai-has-americas-oldest-monopoly-problem
5•marcammann•35m ago•0 comments

How SSA Makes Long Context Practical

https://subq.ai/how-ssa-makes-long-context-practical
3•sirobg•36m ago•0 comments

Ukrainian forces test direct-to-device satellite imagery for frontline troops

https://spacenews.com/ukrainian-forces-test-direct-to-device-satellite-imagery-for-frontline-troops/
4•tcp_handshaker•37m ago•0 comments

When a Search Stack Starts to Strain

https://www.searchplex.net/blog/when-a-search-stack-starts-to-strain
3•eskimo87•37m ago•0 comments

Beware the Man of One Study (2014)

https://www.slatestarcodexabridged.com/Beware-The-Man-Of-One-Study
3•caminanteblanco•45m ago•0 comments

CommFuse: Hiding Tail Latency via Communication Decomposition and Fusion

https://arxiv.org/abs/2604.24013
3•matt_d•45m ago•0 comments

Google Confirms Critical Android 0-Click Vulnerability

https://www.forbes.com/sites/daveywinder/2026/05/05/google-confirms-critical-android-0-click-vuln...
4•turrini•46m ago•0 comments

Firefox Gets FIPS 140-3 Power: WolfPKCS11 Unleashes WolfCrypt in NSS

https://www.wolfssl.com/firefox-gets-fips-140-3-power-wolfpkcs11-unleashes-wolfcrypt-in-nss/
3•aidangarske•46m ago•0 comments

What I gained with a new number / What I lost with a new number

https://shub.club/writings/2026/may/new-number/
2•forthwall•47m ago•0 comments

Cooperating in a Conversation

https://wilsoniumite.com/2026/05/04/cooperating-in-a-conversation/
2•Wilsoniumite•53m ago•0 comments

Cary Elwes Struggled After 'Princess Bride.' Al Pacino Set Him on Right Path

https://www.wsj.com/real-estate/cary-elwes-mia-peacock-22f9c450
3•petethomas•54m ago•0 comments

The dead hang delight: simple exercise can change lives (2024)

https://www.theguardian.com/lifeandstyle/article/2024/aug/04/the-dead-hang-delight-how-this-quick...
2•toilet•54m ago•0 comments

The Cult of Male Miata Drivers (2022)

https://melmagazine.com/en-us/story/men-who-drive-mazda-miata
2•herbertl•54m ago•0 comments

The collaborative software development playbook for remote and distributed teams

https://open-and-async.com/
3•mooreds•54m ago•0 comments

Looking for feedback on AI content in R/programming and the April no-AI trial

https://old.reddit.com/r/programming/comments/1t4odyl/looking_for_feedback_on_ai_content_in/
2•birdculture•55m ago•0 comments

Approximate location sharing gives you more control in Chrome

https://blog.google/products-and-platforms/products/chrome/approximate-location-chrome-on-android/
1•xnx•56m ago•0 comments