Generate type hints for python #675
Description
Python 3 (2 is EOL) allows to add some type hints. They are not enforced without special measures, but can be used by linters (like mypy), REPLs and langservers.
import typingto the top of a file- Output type of a function is shown by an
->before: - Types of arguments are shown by adding
: TypeOfArgright after arg name - Union types are
typing.Union[T1, T2] - Lists are
typing.List[T], or maybe even more generictyping.Iterable[T] - type of
selfis usually not marked as a type of an arg - If a func returns nothing, use
-> None - You need to set the types as strings containing their names if the type is not yet defined:
def a(b: "A") -> "A":
return b
class A:
def __init__(self, asdf: typing.Optional["A"] = None) -> None:
pass
class B:
def __init__(self, asdf: A) -> None:
pass