Method __init__

src/_pytest/fixtures.py:814–820

(
        self, argname: Optional[str], request: FixtureRequest, msg: Optional[str] = None
    )

    """Could not return a requested fixture (missing or invalid)."""

    def __init__(
        self, argname: Optional[str], request: FixtureRequest, msg: Optional[str] = None
    ) -> None:
        self.argname = argname
        self.request = request
        self.fixturestack = request._get_fixturestack()
        self.msg = msg

    def formatrepr(self) -> "FixtureLookupErrorRepr":
        tblines: List[str] = []