Method optional_type

mypy/treetransform.py:795–799

(self, type: Type | None)

        return type

    def optional_type(self, type: Type | None) -> Type | None:
        if type:
            return self.type(type)
        else:
            return None

    def types(self, types: list[Type]) -> list[Type]:
        return [self.type(type) for type in types]