Method param

src/_pytest/mark/structures.py:86–101

(
        cls,
        *values: object,
        marks: Union["MarkDecorator", Collection[Union["MarkDecorator", "Mark"]]] = (),
        id: Optional[str] = None,
    )

):
    @classmethod
    def param(
        cls,
        *values: object,
        marks: Union["MarkDecorator", Collection[Union["MarkDecorator", "Mark"]]] = (),
        id: Optional[str] = None,
    ) -> "ParameterSet":
        if isinstance(marks, MarkDecorator):
            marks = (marks,)
        else:
            assert isinstance(marks, collections.abc.Collection)

        if id is not None:
            if not isinstance(id, str):
                raise TypeError(f"Expected id to be a string, got {type(id)}: {id!r}")
            id = ascii_escaped(id)
        return cls(values, marks, id)

    @classmethod
    def extract_from(