Type hinting Python functions. ... Deferred evaluation of annotations. When using type hints for custom objects, we sometimes need to provide a type hint for an object that hasn’t yet been defined.

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.

Learn how Mypy's type checking works with functions and generators. In my last two articles I've described some of the ways Mypy, a type checker for Python, can help identify potential problems with ...

Python 3 introduced the idea of "type annotations," and as of Python 3.6, you can annotate variables, not just function parameters and return values. The idea is that you can put a colon (:) and then ...

PEP 484 type hints including generics (PEP stands for Python Enhancement Proposal) PEP 526 syntax for variable annotations PEP 544 structural subtyping Type inference for function return values, ...