Mypy, Pytype, Pyright, and Pyre can help you keep your type-hinted Python code bug-free. Let’s see what each of these useful tools has to offer. In the beginning, Python had no type decorations.

If you're trying a type checker on your Python code, your experience and what you can contribute are important to the project's success. If you prefer to run the tests and formatting locally, it's ...

Type[T] works best with Python 3.6 or later. Prior to 3.6, object types must use comment type hint syntax. An Object base class that eliminates boilerplate code and verifies and coerces types when ...

Figure 1. The official Microsoft-authored extension for Python in VS Code also bundles the Pylance linting and type-checking extension. In addition to the Python and Pylance extensions ...

Microsoft started work on Pylance last June and promised it had "the ability to supercharge your Python IntelliSense experience with rich type information, helping you write better code faster." ...

Python’s popularity is still backed ... Instead of finding excuses for not testing your code, you can specify the type wherever it makes sense. While all these things sound pretty great, it ...

This article is adapted from an edition of our Off the Charts newsletter originally published in October 2021. Off the Charts is a weekly, subscriber-only guide to The Economist’s award-winning ...