> x: typing.Union[str, typing.Any] That's absolutely a valid and useful annotation. It tells me, and autocomplete, that "x" is probably a str, more likely than

> x: typing.Union[str, typing.Any] That's absolutely a valid and useful annotation. It tells me, and autocomplete, that "x" is probably a str, more likely than not, but I need to be aware that it might not be.