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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•7mo 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!

Col. Jacques Baud (ret) explains being sanctioned by the EU

https://www.youtube.com/watch?v=VwNH3FLeZLA
1•SanjayMehta•48s ago•0 comments

China taxes condoms, contraceptive drugs in bid to spur birth rate

https://www.reuters.com/business/healthcare-pharmaceuticals/china-taxes-condoms-contraceptive-dru...
2•DustinEchoes•1m ago•0 comments

Gas Town – Multi Agent Workspace Manager

https://github.com/steveyegge/gastown
1•sawirricardo•4m ago•0 comments

Show HN: Mini Apps Builder – a no-code way to build Telegram mini apps

https://miniappsbuilder.com/
3•Anton_Ingachev•11m ago•2 comments

Is Next Year 2027?

https://www.google.com/search?q=Is+next+year+2027%3F&sca_esv=5ee91fe61c00ad93&sxsrf=AE3TifPUb5DSj...
2•CodeCrusader•11m ago•0 comments

Australia Enforces Age ID Checks for Search Engine Users

https://reclaimthenet.org/australia-enforces-age-id-checks-for-search-engine-users
4•turrini•12m ago•0 comments

Open Source JavaScript Choplifter / Defender

https://raould.github.io/sheepgate/
2•cypherpunk666•12m ago•1 comments

What Is Plus Times Plus? (Lambda Calculus Visually) [video]

https://www.youtube.com/watch?v=RcVA8Nj6HEo
3•rramadass•25m ago•0 comments

The US's 2k-year-old mystery mounds

https://www.bbc.com/travel/article/20221204-the-us-2000-year-old-mystery-mounds
2•1659447091•25m ago•0 comments

The Monty Hall Problem, a side-by-side simulation

https://www.pcloadletter.dev/blog/monty/
3•ronbenton•33m ago•1 comments

The State of Agentic iOS Engineering in 2026

https://dimillian.medium.com/the-state-of-agentic-ios-engineering-in-2026-c5f0cbaa7b34
2•Anon84•35m ago•2 comments

On biological & artificial consciousness: A case for biological computationalism

https://www.sciencedirect.com/science/article/pii/S0149763425005251
4•bookofjoe•37m ago•0 comments

Show HN: Sentinel Shield – Pure C DMZ for AI Security (23K LOC, <1ms latency)

2•Chgdz•37m ago•1 comments

Ask HN: Favorite Articles in the ACM Digital Library

2•lioeters•40m ago•2 comments

Interpreter – Offline screen translator for Japanese retro games

https://github.com/bquenin/interpreter
3•bane•44m ago•0 comments

Making beautiful PDF documents from HTML and CSS

https://css4.pub/
2•jez•44m ago•0 comments

Ask HN: Which AI productivity tools are you using in 2026?

3•Vishal19111999•48m ago•0 comments

Ukraine enters EU's single mobile roaming zone

https://www.yahoo.com/news/articles/ukraine-enters-eus-single-mobile-164712435.html
4•gok•50m ago•0 comments

Steam On Linux Ends 2025 With 3.19% Marketshare

https://www.phoronix.com/news/Steam-December-2025-Survey
8•doener•51m ago•0 comments

Engineering Is Becoming Beekeeping

https://bits.logic.inc/p/engineering-is-becoming-beekeeping
5•highfrequency•52m ago•0 comments

Balsa M2-F3 Lifting Body

https://www.engineersneedart.com/blog/m2f32025/m2f32025.html
3•chmaynard•52m ago•0 comments

Outrage as X's Grok morphs photos of women, children into explicit content

https://www.cnbctv18.com/technology/global-outrage-as-xs-grok-morphs-photos-of-women-children-int...
13•anonymousab•53m ago•2 comments

China's BYD set to overtake Tesla as top EV seller

https://www.bbc.com/news/articles/cj9rjwpvmpzo
18•decimalenough•54m ago•1 comments

Show HN: VideoCalling.app – Free Video Calling Service

https://videocalling.app
2•Airyisland•55m ago•0 comments

Webmention is an open web standard (W3C Recommendation) for conversations

https://indieweb.org/Webmention
4•doener•57m ago•0 comments

Show HN: Turning 100-plus comments HN threads into readable discussions

5•freakynit•1h ago•1 comments

DENT: A network operating system (NOS) for everyone else

https://dent.dev/
6•teleforce•1h ago•0 comments

Ask HN: Best videos for learning Java concurrency?

2•michalgad•1h ago•1 comments

Delete Request and Opt-Out Platform (Drop)

https://consumer.drop.privacy.ca.gov/
3•doener•1h ago•1 comments

Simulating a negative tax city on Cities Skylines 2 [video]

https://www.youtube.com/watch?v=MK_0mQ7TLY0
2•MinimalAction•1h ago•0 comments