Guido van Rossum, best known as designer of the Python programming language, recently sent out a proposal on the python-ideas mailing list for adding type annotations to Python function declarations.

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 ...

Mypy can check more than simple Python types. In my last article, I introduced Mypy, a package that enforces type checking in Python programs. Python itself is, and always will remain, a dynamically ...

NumPy 1.20.0, described as the largest-ever release of the scientific computing package for Python, has arrived, introducing new capabilities such as type annotations and expanded use of SIMD ...

This is clearly not what you wanted to do. Python versions 3.6 and higher provide “type annotations,” a feature that enables you to define the type of data each function argument should take.