I've been looking into type hinting my code but noticed that Python programmers typically do not type hint self in their programs Even when I look at the docs, they do not seem to type hint self, see here. This is from version 3.10 post forward declarations def __init__(self, value: T, name: str, logger: Logger) -> None: I can understand why this is an issue before type annotations were introduced in 3.7 with Forward declarations More info here and here The reason this seems useful to me is mypy seems able to catch bugs with this problem example: from __future__ import annotations class Simple(object): def __init__(self: Simple): print(self.x) would return this from mypy mypy test.py test.py:5: error: "Simple" has no attribute "x" Found 1 error in 1 file (checked 1 source file) Which if you remove the type from self becomes Success: no issues found in 1 source file Is there a reason that self is not annotated or is this only convention? Are there trade offs I'm missing or is my annotation of self wrong for some reason? Continue reading...
