Comment by etaweb
15 hours ago
Note that Python supports type annotations in its syntax, but the interpreter will just ignore them as they are meant to be used by external tools such as ruff: https://github.com/astral-sh/ruff
I've had a good experience developing small to medium sized Python programs/scripts using type annotations plus ruff connected to my editor through its LSP (Language Server Protocol). It helps a lot, and I don't like to write Python without it.
You can create types from literal values and use union types, which I feel makes it more pleasant than Go's type system for example.
Definitely mypy keeps my sanity in a relatively large Python project I'm working on :). But I don't believe Python actually assigns any meaning to them, and at times mypy and e.g. pyright may disagree on what the types actually are.