Python on Osmond van Hemerthttps://www.osmondvanhemert.nl/tags/python/Recent content in Python on Osmond van HemertHugo -- gohugo.ioen© Osmond van Hemert. All rights reserved.Thu, 30 Apr 2026 00:00:00 +0000Supply Chain Malware in PyTorch Lightning — When AI Infrastructure Becomes the Attack Surfacehttps://www.osmondvanhemert.nl/posts/260430-pytorch-lightning-supply-chain-malware/Thu, 30 Apr 2026 00:00:00 +0000https://www.osmondvanhemert.nl/posts/260430-pytorch-lightning-supply-chain-malware/A Dune-themed malware campaign targeting the PyTorch Lightning library highlights how AI/ML supply chains are becoming prime targets for sophisticated attacks.Python 3.14 and the Free-Threading Revolution — Is the GIL Finally Behind Us?https://www.osmondvanhemert.nl/posts/260319-python-314-free-threading/Thu, 19 Mar 2026 00:00:00 +0000https://www.osmondvanhemert.nl/posts/260319-python-314-free-threading/Python 3.14’s development is pushing free-threading forward. Here’s what the removal of the GIL means practically, and why it matters more than you might think.Ultralytics Supply Chain Attack — When Your Dependencies Bite Backhttps://www.osmondvanhemert.nl/posts/251218-ultralytics-supply-chain-attack/Thu, 18 Dec 2025 00:00:00 +0000https://www.osmondvanhemert.nl/posts/251218-ultralytics-supply-chain-attack/A supply chain attack on the popular Ultralytics YOLO package highlights the persistent vulnerability of the Python ecosystem’s distribution pipeline.Python 3.13 in Production — Free-Threading and the GIL's Slow Goodbyehttps://www.osmondvanhemert.nl/posts/251127-python-313-free-threading-gil/Thu, 27 Nov 2025 00:00:00 +0000https://www.osmondvanhemert.nl/posts/251127-python-313-free-threading-gil/Python 3.13’s experimental free-threading mode is here. I’ve been testing it in production workloads — here’s what actually works and what doesn’t.Python 3.14 Lands — Free-Threading and the JIT Take Shapehttps://www.osmondvanhemert.nl/posts/251002-python-314-free-threading-jit/Thu, 02 Oct 2025 00:00:00 +0000https://www.osmondvanhemert.nl/posts/251002-python-314-free-threading-jit/Python 3.14 arrives with maturing free-threading support and an experimental JIT compiler, signaling a new performance era for the language.uv Adds Code Formatting — Python's Tooling Consolidation Continueshttps://www.osmondvanhemert.nl/posts/250821-uv-code-formatting-python-tooling/Thu, 21 Aug 2025 00:00:00 +0000https://www.osmondvanhemert.nl/posts/250821-uv-code-formatting-python-tooling/The uv package manager experimentally adds code formatting, continuing its ambitious push to become a single tool for the entire Python development workflow.Python 3.14 Beta and the Free-Threading Revolutionhttps://www.osmondvanhemert.nl/posts/250717-python-314-free-threading/Thu, 17 Jul 2025 00:00:00 +0000https://www.osmondvanhemert.nl/posts/250717-python-314-free-threading/Python 3.14’s beta release showcases the experimental free-threaded mode, promising true parallelism without the GIL — and the implications for the Python ecosystem are enormous.Python 3.13 and the No-GIL Experiment — Threading's Biggest Shakeup in Decadeshttps://www.osmondvanhemert.nl/posts/240801-python-3-13-free-threaded-nogil/Thu, 01 Aug 2024 00:00:00 +0000https://www.osmondvanhemert.nl/posts/240801-python-3-13-free-threaded-nogil/Python 3.13’s experimental free-threaded mode removes the Global Interpreter Lock, and it could fundamentally change how we write concurrent Python.Python 3.12 Is Here — Performance, Developer Experience, and What Mattershttps://www.osmondvanhemert.nl/posts/231005-python-312-release/Thu, 05 Oct 2023 00:00:00 +0000https://www.osmondvanhemert.nl/posts/231005-python-312-release/Python 3.12 arrives with significant performance improvements, better error messages, and a new type system feature that changes how we write Python.Python 3.12 — A Performance-Focused Release Worth Getting Excited Abouthttps://www.osmondvanhemert.nl/posts/230907-python-312-what-developers-need-to-know/Thu, 07 Sep 2023 00:00:00 +0000https://www.osmondvanhemert.nl/posts/230907-python-312-what-developers-need-to-know/Python 3.12 is in release candidate stage with major performance improvements, better error messages, and the foundations of a no-GIL future.Python 3.12 RC1 Drops — What Developers Should Knowhttps://www.osmondvanhemert.nl/posts/230817-python-312-release-candidate/Thu, 17 Aug 2023 00:00:00 +0000https://www.osmondvanhemert.nl/posts/230817-python-312-release-candidate/Python 3.12’s first release candidate arrives with major performance improvements, better error messages, and the groundwork for removing the GIL.Python 3.11 Beta — The Fastest CPython Release Yethttps://www.osmondvanhemert.nl/posts/220721-python-311-performance-leap/Thu, 21 Jul 2022 00:00:00 +0000https://www.osmondvanhemert.nl/posts/220721-python-311-performance-leap/Python 3.11 is in beta with impressive performance improvements. The Faster CPython project is delivering real results, with benchmarks showing 10-60% speedups.PyCon US 2022 — Python's Momentum Shows No Signs of Slowinghttps://www.osmondvanhemert.nl/posts/220428-pycon-us-2022-python-momentum/Thu, 28 Apr 2022 00:00:00 +0000https://www.osmondvanhemert.nl/posts/220428-pycon-us-2022-python-momentum/PyCon US 2022 kicks off in Salt Lake City with Python riding high as the world’s most popular programming language.Python 3.11 Is Shaping Up to Be Seriously Fasthttps://www.osmondvanhemert.nl/posts/220414-python-311-faster-cpython/Thu, 14 Apr 2022 00:00:00 +0000https://www.osmondvanhemert.nl/posts/220414-python-311-faster-cpython/The Python 3.11 alpha releases show 10-60% speedups across benchmarks, driven by the Faster CPython project — and this is just the beginning.Faster CPython — The Ambitious Plan to Double Python's Speedhttps://www.osmondvanhemert.nl/posts/220120-faster-cpython-311-performance/Thu, 20 Jan 2022 00:00:00 +0000https://www.osmondvanhemert.nl/posts/220120-faster-cpython-311-performance/The Faster CPython project, backed by Microsoft and led by Guido van Rossum, is shipping real performance gains in Python 3.11 alpha.Python 3.10 RC1 — Structural Pattern Matching Changes Everythinghttps://www.osmondvanhemert.nl/posts/210826-python-310-structural-pattern-matching/Thu, 26 Aug 2021 00:00:00 +0000https://www.osmondvanhemert.nl/posts/210826-python-310-structural-pattern-matching/Python 3.10’s first release candidate introduces structural pattern matching — the most significant syntax addition since async/await, and it’s worth understanding deeply.Python 3.10 Beta — Structural Pattern Matching Changes Everythinghttps://www.osmondvanhemert.nl/posts/210617-python-310-structural-pattern-matching/Thu, 17 Jun 2021 00:00:00 +0000https://www.osmondvanhemert.nl/posts/210617-python-310-structural-pattern-matching/Python 3.10’s structural pattern matching is the most significant syntax addition since f-strings. Here’s why it matters and where it shines.Python 3.10 Beta 1 — Structural Pattern Matching Changes Everythinghttps://www.osmondvanhemert.nl/posts/210513-python-310-structural-pattern-matching/Thu, 13 May 2021 00:00:00 +0000https://www.osmondvanhemert.nl/posts/210513-python-310-structural-pattern-matching/Python 3.10’s first beta introduces structural pattern matching — the most significant syntax addition since async/await, and it’s worth understanding deeply.Python 3.9.2 and 3.8.8 — Security Patches and the Maturing Python Ecosystemhttps://www.osmondvanhemert.nl/posts/210225-python-392-security-release/Thu, 25 Feb 2021 00:00:00 +0000https://www.osmondvanhemert.nl/posts/210225-python-392-security-release/Python’s latest security releases fix critical vulnerabilities and highlight the increasingly professional security posture of the Python ecosystem.Python 3.9 Is Here — And It's More Than Just Dictionary Merginghttps://www.osmondvanhemert.nl/posts/201008-python39-release/Thu, 08 Oct 2020 00:00:00 +0000https://www.osmondvanhemert.nl/posts/201008-python39-release/Python 3.9 dropped this week with new parser, dict merge operators, and type hinting improvements — here’s what actually matters for production code.Python 3.9 — Dictionary Unions, Type Hints, and the Steady March Forwardhttps://www.osmondvanhemert.nl/posts/201001-python-39-new-features/Thu, 01 Oct 2020 00:00:00 +0000https://www.osmondvanhemert.nl/posts/201001-python-39-new-features/Python 3.9 arrives with dictionary merge operators, relaxed type hint syntax, and a new parser that sets the stage for the language’s future.Python at the Frontlines — How Data Science Is Shaping the Pandemic Responsehttps://www.osmondvanhemert.nl/posts/200402-python-covid-data-science/Thu, 02 Apr 2020 00:00:00 +0000https://www.osmondvanhemert.nl/posts/200402-python-covid-data-science/Python and its data science ecosystem are playing a central role in COVID-19 analysis, from epidemiological modeling to resource allocation dashboards.Python 2 Is Dead — Long Live Python 3https://www.osmondvanhemert.nl/posts/200102-python2-end-of-life-new-decade/Thu, 02 Jan 2020 00:00:00 +0000https://www.osmondvanhemert.nl/posts/200102-python2-end-of-life-new-decade/Python 2 officially reached end-of-life on January 1, 2020. After over a decade of transition, what does this mean for teams still running Python 2 code?