Write cleaner and faster Python code

Meta released Pyrefly 1.0, a fast Python linter and type checker for PyTorch and Django projects. Python 3.15 introduces a sampling profiler for efficient code instrumentation. A new malware called Hades exploits Python's package ecosystem, hiding in packages and evading LLM-based security tools.

Meta’s long-awaited Pyrefly linter is out in a 1.0 version, and the forthcoming Python 3.15 https://www.infoworld.com/article/4166693/the-best-new-features-in-python-3-15.html has a super-efficient sampling profiler. Plus we have a comprehensive rundown of Python’s indispensable virtual environments — and a warning about a novel breed of malware that exploits Python’s package ecosystem. How to use virtual environments in Python https://www.infoworld.com/article/2260103/how-to-use-virtual-environments-in-python.html Isolate and protect your Python projects from each other, and empower them to do more, with virtual environments and their native-to-Python tooling. Pyrefly 1.0: A fast, forward-looking Python linter https://www.infoworld.com/article/4179383/pyrefly-1-0-a-fast-forward-looking-python-linter.html The first full release of Meta’s long-awaited linting and type checking tool for Python delivers speed and offers advanced features for type-checking PyTorch and Django projects. Hands-on with the new sampling profiler in Python 3.15 https://www.infoworld.com/video/4085906/hands-on-with-the-new-sampling-profiler-in-python-3-15.html Among Python 3.15’s best new features is a sampling profiler, for instrumenting your code and finding its bottlenecks with a minimum of performance impact or fuss. See up-close how it works. All about Hades, the supply-chain malware that hides in Python packages https://www.infoworld.com/article/4182692/meet-hades-the-malware-that-lies-to-ai-security-agents.html It hides in Python packages. It replicates itself across systems. It fools LLM-based code analysis tools into ignoring it. And there may be a lot more like it to come. Python Steering Council calls for temporary pause on JIT project https://discuss.python.org/t/an-announcement-from-the-steering-council-regarding-the-jit-project/107638 The requested pause stays in place until a proper Standards Track PEP lands for the experimental JIT just-in-time compiler, the better to describe how the JIT will be a formal and supported part of Python. Pyodide 314.0: Pyodide packages on PyPI https://blog.pyodide.org/posts/314-release Thanks to PEP 783, Python packages built with Pyodide Python ported to WebAssembly can be installed straight from PyPI instead of through Pyodide — another step closer to Py-on-Wasm becoming an everyday thing. All about that Python 3.14 garbage collection rigmarole https://theconsensus.dev/p/2026/06/06/python-3-14-garbage-collection-rigamarole.html A new garbage collector introduced in Python 3.14 was yanked at the last minute due to reports of higher memory usage. Here’s a deep dive into what changed for the worse and why. Are you really expected to run five type checkers now? https://pyrefly.org/blog/too-many-type-checkers No, but you should keep your options open. This blog post from a Pyrefly contributor recommends choosing one of the major offerings Mypy, Pyrefly, Pyright, ty, Zuban, etc. , but also getting to know the others too.