Method lookup_type

mypy/checker.py:7821–7826

(self, node: Expression)

        return None

    def lookup_type(self, node: Expression) -> Type:
        for m in reversed(self._type_maps):
            t = m.get(node)
            if t is not None:
                return t
        raise KeyError(node)

    def store_types(self, d: dict[Expression, Type]) -> None:
        self._type_maps[-1].update(d)