Optional [...] is a shorthand notation for Union[..., None] , telling the type checker that either an object of the specific type is required ... ... <看更多>

today I talk about the Optional type in python typing and why I think it is very poorly namedplaylist: ... ... <看更多>

from typing import overload, Literal, Tuple, Optional, ... for a way to fix that wouldn't involve changes to how Python parses code: ... ... <看更多>

Python added support for type hints in the typing module in Python ... type hints are an optional feature of python. ... Using type hints is optional. ... <看更多>

from typing import TypeGuard # use `typing_extensions` for Python 3.9 ... def validate(credentials: MaybeCredentials) -> Optional[tuple[str, ... ... <看更多>