Method __init__

src/_pytest/python_api.py:929–938

(
        self,
        expected_exception: Union[Type[E], Tuple[Type[E], ...]],
        message: str,
        match_expr: Optional[Union[str, Pattern[str]]] = None,
    )

@final
class RaisesContext(Generic[E]):
    def __init__(
        self,
        expected_exception: Union[Type[E], Tuple[Type[E], ...]],
        message: str,
        match_expr: Optional[Union[str, Pattern[str]]] = None,
    ) -> None:
        self.expected_exception = expected_exception
        self.message = message
        self.match_expr = match_expr
        self.excinfo: Optional[_pytest._code.ExceptionInfo[E]] = None

    def __enter__(self) -> _pytest._code.ExceptionInfo[E]:
        self.excinfo = _pytest._code.ExceptionInfo.for_later()