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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!

Metro Siege Kickstarter Trailer [video]

https://www.youtube.com/watch?v=gZ7caW75ufY
1•doener•1m ago•0 comments

Show HN: A fast paced multiplication game with an international leaderboard

https://www.fastmathfacts.io/
1•squid-protocol•2m ago•0 comments

Do We Need Billionaires?

https://bjhess.com/posts/do-we-need-billionaires
1•speckx•3m ago•0 comments

Kagi Search, human connection, and why LLMs are not a good search replacement

https://www.alexselimov.com/posts/small_search_human_contact/
1•aselimov3•3m ago•0 comments

'I knew it was over for us': the bands who got left behind when punk exploded

https://www.theguardian.com/music/2026/jun/05/i-knew-it-was-over-for-us-the-bands-who-got-left-be...
2•6LLvveMx2koXfwn•3m ago•0 comments

Apple approves Poke as the first AI agent on Messages

https://twitter.com/interaction/status/2062575428213285352
1•lucamark•4m ago•0 comments

EU wants households to cut back electricity as industry, AI demand soars

https://www.eenews.net/articles/eu-wants-households-to-cut-back-electricity-as-industry-ai-demand...
1•geox•5m ago•0 comments

Component Party

https://component-party.dev/
1•doruk101•5m ago•0 comments

Tus: Open protocol for resumable uploads built on HTTP

https://tus.io/
1•ahamez•5m ago•0 comments

AI Data Centers Are Building a New Political Coalition

https://www.nytimes.com/video/us/100000010828227/how-ai-data-centers-are-building-a-new-political...
1•mrzool•8m ago•0 comments

The energy efficiency of agent networks

https://vdf.ai/white-papers/energy-efficiency-benchmark/
1•suhaselcuk•8m ago•1 comments

A former employee called me

https://andys.blog/p/dd591611-588e-47f8-8066-c1544562e81f/
1•andytratt•8m ago•0 comments

Guardian's World Cup Guide (A great example of digital journalism and design)

https://www.theguardian.com/football/ng-interactive/2026/jun/04/world-cup-2026-complete-player-guide
1•stog•8m ago•0 comments

Observing LLM Applications with OpenTelemetry

https://signoz.io/blog/opentelemetry-llm/
3•dhruv_ahuja•9m ago•0 comments

OpenCV 5 Is Here: The Biggest Leap in Years for Computer Vision

https://opencv.org/opencv-5/
2•xnx•10m ago•0 comments

Australia will run an overt command economy by 2040

https://caseyhandmer.wordpress.com/2026/04/16/australia-will-run-an-overt-command-economy-by-2040/
1•0xpgm•11m ago•0 comments

Shimane farming districts face onslaught from rising monkey population

https://www.japantimes.co.jp/news/2026/04/27/japan/society/wild-monkeys-crop-damage/
2•PaulHoule•15m ago•0 comments

Mployee.me Resume Scan – Scan your CV for missing skills before applying

https://www.google.com/search?q=resume+scan+site%3Amployee.me&sca_esv=dd2b2b014dbf83da&biw=1440&b...
1•jatinbatra18•16m ago•0 comments

Using Local ClickHouse for data processing

https://old.reddit.com/r/programming/comments/1txh6as/using_local_clickhouse_for_data_processing/
1•theanonymousone•17m ago•0 comments

Data Refresh for Long-Term Storage [video]

https://www.youtube.com/watch?v=1B7yg7LWiik
1•dsego•17m ago•0 comments

Disco Demolition Night (Chicago, 1979)

https://en.wikipedia.org/wiki/Disco_Demolition_Night
2•RetroTechie•18m ago•0 comments

Job Match Pro – Aggregating and matching job boards to your resume

https://www.google.com/search?q=job+match+pro&sca_esv=dd2b2b014dbf83da&sxsrf=ANbL-n6Q0nXMjJD9EESA...
1•padhakku18•19m ago•0 comments

Win16 Memory Management

http://www.os2museum.com/wp/win16-memory-management/
1•supermatou•20m ago•0 comments

Show HN: Local-first fast CPU image to text for screenshots, PDFs, webpages

https://github.com/kouhxp/textsnap
1•mrkn1•21m ago•0 comments

Canada says AI strategy will help create 250k jobs, boost GDP by 3%

https://www.reuters.com/business/world-at-work/canada-says-ai-strategy-will-help-create-250000-jo...
1•voisin•23m ago•0 comments

SpaceX won’t make the S&P 500

https://www.ft.com/content/b39d9e91-ad91-4230-986a-aadd2ea92452
2•nutjob2•25m ago•0 comments

'World-first' vaccine designed by artificial intelligence

https://www.bbc.com/news/articles/crrpggegwe0o
2•voisin•26m ago•0 comments

Seven Years on a Public Clipboard: Secrets, Türkiye's Exposure, and a Stored XSS

https://beyondmemory.io/blog/json-formatter-data-exposure
1•Anon84•27m ago•0 comments

Productivity effects across generations of AI coding tools [pdf]

https://www.nber.org/papers/w35275
1•pramodbiligiri•28m ago•0 comments

Beneath Nvidia AI chips, Chinese PCBs raise security concerns in U.S.

https://www.cnbc.com/2026/06/03/beneath-nvidia-ai-chips-chinese-pcbs-raise-security-concerns-in-u...
1•throw0101a•28m ago•0 comments