I have a function which accepts any function such that:

• it accepts any number of arguments of type str
• it may accept any number of keyword arguments of any type
• it returns str

Examples of acceptable function:

• def func(a: str, b: str, c: str, *, foo: int) -> str
• def func(a: str, b: str, *, foo: int) -> str
• def func(a: str) -> str

Examples of non-acceptable functions:

• def func(a: str, b: str, c: str, foo: int) -> str
• def func(foo: int) -> str

How can I type this so mypy will accept it?

I’ve tried Callable[[str, ...], str] but mypy already rejects that, and I don’t know how to add in the “kwargs of any type” part