There are two common ways this happens: using Python keywords or built-in names as your own, and accidentally naming your scripts after existing Python modules.

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.

Tools If you decide that porting code from Python 2 to 3 is the way to go, there are some existing tools to make your life easier. 2to3 – the official automated code translation tool.