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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 therapy chatbots in 2026: what Replika, Woebot, and ChatGPT get right

https://medium.com/@6thMind/ai-therapy-chatbots-in-2026-what-replika-woebot-and-chatgpt-get-right...
1•smanuel•49s ago•0 comments

Emacs 31 Is Around the Corner: The Changes I'm Daily Driving

https://www.rahuljuliato.com/posts/emacs-31-around-the-corner
2•frou_dh•2m ago•0 comments

Show HN: Glassboard – Draw over everything on your Mac, Khan-academy style

https://stem.ps/glassboard/
1•stemps23•5m ago•0 comments

From pixels to planning: Earth AI for nature restoration

https://research.google/blog/from-pixels-to-planning-earth-ai-for-nature-restoration/
1•thm•5m ago•0 comments

Pyrefly v1.1 is here 27% faster, refactoring tools, tensor shapes

https://pyrefly.org/blog/v1.1/
1•ocamoss•5m ago•0 comments

Show HN: Circular Map with You in the Middle

https://hubofuniverse.com/
1•bitslayer•8m ago•0 comments

Goodbye RSS

https://basic.bearblog.dev/goodbye-rss/
1•speckx•8m ago•0 comments

Smashing the NIMBYs created modern capitalism

https://worksinprogress.co/issue/how-abolishing-the-stakeholder-state-caused-the-industrial-revol...
1•bensouthwood•9m ago•0 comments

What's Easy Now? What's Hard Now?: Software is easier for coding agents

https://brooker.co.za/blog/2026/05/18/whats-easy-whats-hard.html
1•xenophenes•10m ago•0 comments

Show HN: Glisker – First-impression feedback on your landing page (no signup)

https://www.glisker.com/
1•merveceylan•10m ago•0 comments

Apple Prepares Second-Generation iPhone Air for Spring 2027

https://www.bloomberg.com/news/articles/2026-06-17/apple-prepares-second-generation-iphone-air-fo...
1•nicksergeant•11m ago•0 comments

Show HN: Polyvia – Multimodal document retrieval over 100K+ files

https://github.com/polyvia-ai/polyvia
1•mgierlach-polyv•13m ago•0 comments

Show HN: Eggspression – shape any bird egg in 3D from four parameters

https://s13k.dev/eggspression/
2•s13k•14m ago•0 comments

Cotect – move around your repo with WASD

https://cotect.dev/
1•grzracz•18m ago•0 comments

World’s “most famous” tree dies after 1000 years in England

https://www.dexerto.com/entertainment/worlds-most-famous-tree-dies-after-1000-years-in-england-33...
1•thunderbong•19m ago•0 comments

Thomas Jefferson to John Norvell (1807)

https://press-pubs.uchicago.edu/founders/documents/amendI_speechs29.html
1•downbad_•21m ago•0 comments

Life: Nasty, Brutish, and Short (1987)

https://www.jsoftware.com/papers/eem/life.htm
3•tosh•23m ago•0 comments

Systems Get Gamed

https://arnoldkling.substack.com/p/systems-get-gamed
3•jger15•26m ago•0 comments

I found 10k GitHub repositories distributing Trojan malware

https://orchidfiles.com/github-repositories-distributing-malware/
4•theorchid•27m ago•0 comments

We blamed 112,000 commits to find out If AI-written code is buggier

https://www.repowise.dev/blog/engineering/is-ai-written-code-buggier-than-human-code
2•swatiahuja•27m ago•1 comments

AI will create more jobs for humans, not replace them says Jeff Bezos

https://www.bbc.co.uk/news/articles/ceqdrw2yy3vo
1•rvz•29m ago•1 comments

Adding a Town Square

https://kevquirk.com/town-square
2•whilenot-dev•31m ago•0 comments

Modos Color Monitor Pushes E-Paper Displays Further

https://spectrum.ieee.org/modos-e-paper-monitor
3•Vinnl•31m ago•1 comments

Prediction Markets' Next Major Bet: Wall St. Traders

https://www.nytimes.com/2026/06/17/business/dealbook/hedging-prediction-markets-kalshi.html
2•thm•32m ago•0 comments

Commodore's New Flip Phone Focuses on Digital Detox

https://www.cnet.com/tech/mobile/commodores-new-flip-phone-focuses-on-digital-detox-blocks-social...
1•daniel_iversen•32m ago•1 comments

We Did the Math on Why the iPhone 18 Pro Could Cost $1,299

https://www.wsj.com/tech/personal-tech/apple-iphone-price-increase-e846d737
1•thm•34m ago•0 comments

Rue: Higher level than Rust but lower level than Go

https://github.com/rue-language/rue
1•tosh•36m ago•0 comments

Challenging the Narrative of European Decline

https://paulkrugman.substack.com/p/challenging-the-narrative-of-european-478
19•vrganj•38m ago•1 comments

Prompt processing vs. generation: two phases, opposite bottlenecks

https://vettedconsumer.com/prompt-processing-vs-generation-why-your-box-is-fast-at-one-and-slow-a...
1•ermantrout•39m ago•0 comments

Trump says Apple to partner with Intel on US chip design, production

https://www.reuters.com/business/trump-says-apple-work-with-intel-manufacture-chips-us-2026-06-18/
2•maxloh•40m ago•0 comments